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Monday, December 13, 2021

Awareness and Attitude to Social and Health Hazards from Portable Power Generator in Commercial Areas of Karachi, Pakistan_Crimson Publishers

 Awareness and Attitude to Social and Health Hazards from Portable Power Generator in Commercial Areas of Karachi, Pakistan by Durdana R Hashmi in Significances of Bioengineering & Biosciences_Journal of Bioscience and Bioengineering


Abstract

The acute shortage of electricity in Pakistan has led to indiscriminate, unregulated and prolong use of generators for electricity by the citizens, contributing the noise pollution in the country. The aim of this study was to estimate the level of noise pollution and possible health impacts from the use of portable electricity generators at 04 locations areas selected in commercial of Karachi city. Impacts of noise pollution were calculated by a semi-structured questionnaire interview method regarding the health hazards associated with the noise of portable power generators. Survey was conducted with 310 persons, randomly selected as shopkeepers, office workers and push-carters. Results showed that continual exposure of generator noise producing adverse health effect on the habitants includes hearing loss, noisiness, sleep disturbances, cardiac disturbances, impaired task performance, annoyance and bad behavioral reactions. This negative health effect of noise pollution among residents of the city needs urgent attention.

Keywords: Health hazards; Environment; Exposure; Portable generator; Noise pollution

Introduction

World Health Organization ranked third position to noise pollution after water and air pollution. Noise pollution problem is becoming a universal issue in developing countries and an important factor for public health problems [1]. Presently in our country, one of the main causes of noise pollution is portable power generators. The Severe shortage of electricity in Karachi city has directed to indiscriminate, unregulated, and prolong use of portable electric power generators for electricity by her citizens. A portable power generator is a gasoline, petrol or diesel-powered device that is used as an alternative temporary arrangement of electrical power supply up to certain voltage [2]. Portable power generators are used very commonly in shops, offices and homes as an alternative source of power supply during power shutdowns period [3,4]. These generators emit very high levels of noise, in addition to noxious air pollutant emissions.
According to the recent researches noise is now considered as a serious health hazards in our modern societies [5]. Prevalence of both auditory and non-auditory effects is widespread among the workers/operators working in a noisy environment. The non-auditory hazards of noise include irritation, anger, loss of memory and sleeping disorders [6]. World Health Organization (WHO) estimated that 360 million peoples in the world disabling the hearing loss, out of which 91% are adults and only 9% are children [7]. Incidence of disabling hearing impairment in South East Asia is 2.4% in children, 9.5% in adults below 65 years and up to 48% in adults above the age of 65 [8].

Materials and Methods

This study was conducted at 04 locations in commercial areas of Karachi. All the selected locations were highly commercial activities areas surrounded by different types of shops, offices, pushcarts and commercial cum residential buildings. A comparative cross-sectional study design was used which involved questionnaire to the participants/generator users. The questionnaire assessed a cross-section of different age groups, educational levels/literacy level and occupation of respondents. The general population who had participated in this study included small business shops keepers, office workers, loaders and push carters above 16 years of age in all the selected areas and categories. A semi-structured questionnaire was used to gain information on the perception and knowledge from the participants regarding the Health hazards of noise. The questionnaire was divided into three sections. First section asked some general questions, such as age, occupation and educational status. The following section incorporated the questions on the status of Knowledge/Information about hazardous effects and the last section of the questionnaire, asked the questions to examine the risk/hazards with the exposure of generator noise on human health.

Result

(Figure 1) presented the percentage of the respondents according to the age limit. It reveals that majority 267(86.1%) of the respondents were aged above 20 years. Of these a large number (54.5%) belongs to 30-50 years age, while 43(14%) were below 20 years of age group.

Figure 1:Respondents according to the age group.


Figure 2:Level of education of the respondent.


(Figure 2) presented the percentage of the respondents according to the level of education, 19% of the respondents have no education, whereas 30% of the respondents were educated up to secondary school certificate (level 10) and from the remaining 51% respondents, 32% were educated up to higher secondary school certificate (level 12) and 19% were having graduate and above level education.

Figure 3:Percentage of respondents according to awareness/knowledge of health hazards.


(Figure 3) presented the percentage of respondents according to the awareness/knowledge of Health Hazards associated with Portable Power Generators in home shops and workplace. More than half of the respondents 209(67.4%) agreed that use of portable electric generators cause great harm on human health. 223(72%) were well informed about the fact that noise can cause impaired hearing, a large percentage 180(58%) indicated that portable power generator is major source of indoor noise pollution. Less than half of the respondents 94(30%) believed that noise from the use of portable generator can bring about conflict among neighbors, 102(33%) assumed that dispensing fuel into the portable power generator could pose any danger to human and environment. Surprisingly less than 50% of the participants 132(42%) agreeing to the fact that exposure to noise from power generator can cause sleeplessness. Majority of the respondents 223(72%) agreed that use of hearing protection device can protect oneself from hearing impairment.

Figure 4:Percentage of respondents according to the risk of health.


(Figure 4) presented the percentage of respondents according to the awareness/knowledge about health risk with the use of Portable Power Generators. A large percentage of participants 212(68%) respond that by the indoor use of portable electric generators they feel hearing disability (specially in adults), whereas half of the respondents 162(52.3%) indicated that indoor use of portable generator shows behavioral effect specially in female as they spent most of the time in the indoor environment for housekeeping. Similarly, about half respondents 146(47%) also complain about performance effects due to noise intensity in the indoor and outdoor environment. Less than half of the respondents 132(42%) believed that noise producing from portable generator in house, shops and at workplace causing hypertension problem. Similarly, very low percentage of the respondents 106(34%) showing some mental disorder similarly 91(29%) complained about cardiac effects due to regular use of power generator in the indoor environment during electricity shut down period.

Discussion

Present study was conducted at 04 locations in commercial areas of Karachi. A semi-structured questionnaire was used to gain information on the perception and knowledge from the participants regarding the hazardous effects associated with power generator noise. The age of Participants in this study from all the selected locations ranged from 16 to 59 years. Majority (82%) were above 20 years while (14%) were below 20 years of age (Figure1 & 2). Knowledge and awareness about Health Hazards presented in (Figure 3 & 4) respectively. High level of Knowledge and awareness (67%) was noticed among the users of portable power generators about health hazards (58%) participants respond that presently one of the major sources of noise pollution is power generators, using 03 times daily for two hours during load shedding period. According to the recent researches on noise pollution hazards majority of the respondents agreed to the fact that noise pollution is a source of hearing impairment [9]. Result regarding the use of hearing protection devices such ear plug and earmuffs in order to protect from hearing loss is not surprising because some of them were already using cloths and scarf to protect their ears from noise pollution hazards.
The efficiency of hearing protection devices in preventing the noise induced hearing loss is mainly depend on the correct choice, use and properly wearing these protection devices [10]. Results of a study that was conducted in a steel rolling mill in Nigeria, shows that less than half of the workers were properly using Hearing Protection Devices (HPDs), due to the lack of awareness and information regarding the noise induced health hazards [11]. Sleep disturbance is one of the serious problems due to noise pollution. Result of this study regarding the sleep disturbance due to power generator noise is surprising, as less than half of the respondents were agreed that generators noise could cause sleep disturbance. One of the reasons might that due to hard working in day/nighttime the noise of generator is uncountable factor than the sleep, in the view of respondent noise is bearable than the hotness of summer season.

According to the World Health Organization (WHO) guideline noise level for a good sleep is 30dB(A), while noise levels exceeding 45dB(A) should be avoided [12]. Regarding the question about conflict among neighbors, less than half of the respondents were agreed to this fact. According to the National Environment Quality Standards (NEQS), the limit for noise in residential areas was set at 55 decibels during the day and 45dB during the night., Whereas, diesel generators generate 88dB of noise, while generators running on petrol or gas can go above 95dB (Published in The Express Tribune, May 22nd, 2011),

Conclusion

The present study shows that commercial areas of Karachi are highly exposed to noise pollution. Due to shortage of electricity and erratic shutdown of power supply, inhabitants are immense to use portable power generators in homes, offices and their workplace during shutdown period that are producing noise pollution and serious health hazard. Results show that most of the respondents had high level knowledge about the harmful effects of noise at workplace and home. Main finding of this study is that majority of the respondents revealed that noise induce hearing loose (NIHL) had low priority than other health hazards such as cancer, cardiovascular disease, pulmonary problems, chemical burn and other issues in the life.

There is a need of eco-city planning and of arranging awareness program on noise pollution hazards to train the workers about harmful effects of noise pollution on hearing disability, stating the level at which noise is considered dangerous. Necessary preventive measures must also be taken by the government and appropriate authority to implement the noise pollution (Regulation and Control) Rules.

References

  1. Azodo AP, Adejuyigbe SB (2013) Examination of noise pollution from generators on the residents of Obantoko Ogun state, Nigeria. Asian J Eng Sci Technol 3(1): 31-41.
  2. Ashmore MR, Dimitroulopoulou C (2009) Personal exposure of children to air pollution. Atmospheric Environment
  3. 43(1): 128-141.

  4. Ibitoye FI, Adenikinju A (2007) Future demand for electricity in Nigeria. Applied Energy 84(5): 492-504.
  5. Azodo AP (2014) Electric power supply, main source and backing: A survey of residential utilization features. Int J Res Stud Manage 3(2): 87-102.
  6. Stansfeld S, Haines M, Brown B (2000) Noise and health in the urban environment. Rev Environ Health 15(1-2): 43-82.
  7. Evans GW, Lercher P, Meis M, Ising H, Kofler WW (2001) Community noise exposure and stress in children. J Acoust Soc Am 109(3): 1023-1027.
  8. World Health Organization (2014) Deafness and hearing impairment fact sheet.
  9. WHO (2012) Global estimates on prevalence of hearing loss?
  10. Jibiri NN, Olaluwoye MO, Ayinmode BO (2015) Assessment of health effects of noise and vibration levels at major business complexes and markets in Ibadan metropolis, Nigeria. Journal of Health Science 5(4): 69-75.
  11. Yesufu AL, Ana GREE (2012) Electric generator characteristics, pattern of use and non-auditory health effects experienced by commercial workers in Agbowo and Ajibode areas of Ibadan, Nigeria. Review of Global Medicine and Healthcare Research 3(2): 159-171.
  12. Anya AA, Solomon NC, Paul CO, Aguh PS (2017) Effects of noise and vibration on subjects exposed to electrical power generating set pollution. Advances in Research 11(4): 1-11.
  13. World Health Organization Regional Office for Europe (2004) Noise and sleep technical meeting on sleep and health. Bonn, Germany.

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Friday, December 10, 2021

Some Unexpected Results of Experimental Measurement of Papers in Experiments in Fluids_Crimson publishers

 Some Unexpected Results of Experimental Measurement of Papers in Experiments in Fluids by Tang JH in  Advancements in Civil Engineering & Technology_Civil engineering research journal


Abstract

In project of applied geotechnical engineering it is necessary to know the shearing characteristics of the soil in place. In some cases, it is not possible to recover intact samples, maintaining their representative mechanical properties and analyzing them in the laboratory. It is, therefore, necessary to carry out tests in situ to determine the mechanical characteristics of soil that are essential to project design. This article reports a practical case study on alluvial sediments with a coarse gravel sandy texture. For its appropriate analysis a large in situ direct shear test has been designed and performed. This technique identified the presence of a weak soil cementation by natural calcite and its important effect on geotechnical soil failure behavior. Moreover, the test stated the unusual shear characteristics for a granular soil-structure of alluvial origin, and the proper cohesion and friction angle values (C=36.9 kPa; ϕ= 52°) to consider in the project.

Keywords: In situ direct shear test; Gravel granular material; Natural cemented soil; Geo Identity Research

Introduction

The geological environment is represented by fluvioglacial sediments with natural cemented soils composed of clean gravel, with pebbles, sand and well-rounded grain shape. The traditional investigations, such as geo-gnostic surveys and excavations, alter mechanically the natural state of this soils removing the partial vadose cementation between grains and consequently sampled soil appear as loose granular material. Both the in situ and laboratory geotechnical tests can miscalculate or underestimate its shear characteristics, which are essential in designing projects. In this case also a small amount of cementation of soil was still of essential importance, because the project included the hydraulic thrust of a large concretemonolithic box into the ground and the soil strength properties play a critical role to the construction accomplishment. Therefore, to define the strength characteristics of materials, experimental large in situ direct shear test has been designed and performed. This publication presents a geological and hydrogeological description of the zone, the carried out direct shear test and its geotechnical results, with evaluation of the shear resistance of investigated soil.

Material and Methods

Site and geology description

This trial was conducted in Northern Italy, precisely at the GPS Coordinate: 45°25’37.3”N 10°56’50.6”E. From geological point of view the area belongs to the central part of the high Po Valley, which is characterized by well-defined geomorphological and hydrogeological features. It is a large portion of territory between the morainic hills of Garda Lake, on the West side, the northern massive carbonate from the chain of Lessini mountains and, on the south, the so-called water reviving line on the Pianura Veronese. The morphological distinctive element of this area is undoubtedly made up of the huge alluvial fan of the Adige River. It was formed in the Quaternary era by the input of massive quantity of debris material, transported by the river that stemmed from the great Pleistocene Alpine glaciers. The catchment basin of the Adige River is composed of many limestones Formations, which form a part of the Southern Limestone Alps complex. Water percolates through limestone and chalk during Quaternary periods were largely made up of calcium and magnesium carbonates. The re-deposition of this minerals in form of calcite cement in the porous sediment of the flood plain was so favored. From the hydrogeological point of view the area is composed of a single phreatic complex, whose piezometric surface is located between -50 m and -52 m below the surface [1,2]. The subsoils have been explored with geological surveys and its stratigraphy indicates a thick sediments layer of several decameters composed by gravel to gravelly-stony materials, with sporadic sandy matrix and local traces of silt. The grains that compose the subsoil are cemented by natural calcite with an open-porphyric pattern, in which the primary grains float in the expanding crystal matrix [3]. In this particular case ionicly bonded calcite forms a thin film coat that covers the grains at particle contact points, providing a weak cementation of the soil while this preserves a high level of porosity.

Analytical methods

For the evaluation of the geotechnical soil properties following tests were performed: Classification of the material by soil particle size analysis and Atterberg limits according to standard CNR-UNI 10006 [4]; determination of bulk density in the site according to technical standard CNR n. 22 [5]; determination of the soil resistance parameters through direct shear test in the site according to ASTM D 4554 [6]. Regarding the latter, a large in-situ direct test was necessary to verify, direct in place and experimentally, the shearing features of the soil. Due to the lithological characteristics described above, undisturbed soil samples for laboratory analysis could not be taken in any way. A further problem was the representativeness of an eventual soil sample containing grains with dimension larger than then centimeter, that requires outsized and not normally available laboratory equipment. Thus, a sort of direct share box test has been assembled preserving the natural undisturbed soil inside of it (Figure 1). The size of the in situ tested samples was proportionate to that of the gravel present soil. The share box was assembled by a reinforced concrete casting that covers samples that were preventively excavate with high accuracy in soil. The direct shear test consists in subjecting the soil sample to two forces acting on orthogonal planes to each other, a vertical σ stress and a horizontal cutting τ stress, to verify its behavior till to the critical state. In consideration of the geological engineering problem of interest, shear tests were carried out in a low range of vertical load, which should reflect the stress state of the soil in real conditions.

Figure 1:Layout of the large in situ direct test.


Result and Discussion

Soil characteristics

The study of the grain size distribution curves classifies the soil as clean gravel (silty fine fraction <2.3%) with pebbles and sand, well sorted, hazel color with rounded to sub-rounded shape, weakly cemented and with strong reaction to hydrochloric acid. According to Unified Soil Classification System USCS [7] the soil corresponds to the group GP, poorly graded gravel. The Atterberg limits indicate instead: plastic limit PL= non-plastic; plastic index IP=0. An extremely reduced presence of silt-fraction was therefore confirmed, and this leads to the exclude any cohesive action provided by the soil fine-matrix. On site defined bulk density revealed the following values, typical of a dry compact soil: Dry bulk density: γd= 1,93 t/m3; Water content in its natural state: w=4.3 %.

Shear resistance

The stress-controlled tests were performed on a total of five samples and completed under drained condition. The shear characteristics have been defined with reference to the stress state recorded at the peak of the stress-strain curves (Table 1). To predict the shear strength in drained conditions the Mohr-Coulomb theory may be used [8]. In terms of effective stresses, the shear strength is often approximated using the equation: τ=c + σ tanϕ. Were “c” is called cohesion, ϕ is the angle of internal friction and σ is the total stress applied normal to the shear plan. As confirmation of the good result of the test carried out and the consequential reliability of the obtained data, it should be noted the curved trend of the experimental interpolation which passes through all the points defined by the shear tests (Figure 2). This in analogy with the curvature (nonlinearity) of the theoretical failure envelope that occurs because the dilatancy of closely packed soil particles on confining pressure. The intercept of the fitting curve on the τ shear stress axis represent the natural cohesion of soil we were evaluating.

Table 1:Recorded values of normal stress (σn) and the peak shear stress (τ) on the tested soil samples.


Characteristic shear strength parameter of soils like cohesion and friction angle could be extrapolated from the failure curve. A linear interpolation of data set bound to the minimum value of shear stress provide values of intercept and inclination respectively equal to c=21kPa and ϕ=55°. The natural morphology of the project location defines the presence of a modest lithostatic stress, due to the shallow depth under the surface of the underpass excavation. Therefore, in our real case the failure curve can be approximated to a straight line marked out in a normal stresses range close to that predicted in project (Figure 2). So, values of intercept and inclination provide values of cohesion C=36.9kPa and soil friction angle ϕ=52°. These values are significantly higher than those normally considered for loose ground, even if partially cohesive. Moreover, test samples contain only 2.3% of fine fraction <0.075 and so we can exclude the presence of cohesion for this poorly graded gravel soil [9-11]. Moreover, the tests confirmed the presence of a weak cementation that influences the constructive design techniques.

Figure 2:Representation on the σ-τ plane of the direct shear tests results.


Drained stress strain curves

Figure 3:Detail of the stress/strain behaviour with any normal stress applied on sample five.


The weak cementation of soil, otherwise undetectable by geognostic routine analysis, is confirmed by the stress-strain curve of the sample number five (Figure 3), for which the test was performed with any normal stress. This curve describes the non-frictional part of the shear resistance which is independent of the normal stress, and the stress-strain response directly represent the strength of cemented material. In fact, by placing σ=0 in the Mohr-Coulomb equation (τ=c + σ tanϕ), the shear strength depends theoretically only on the cementation (τ=c). The curve shows in its initial part the absence of share strain, due to the resistance offered by the stiffness properties of the grain’s cementation. By increasing the shear stress produce a progressive failure of the ionic bonds that cement the soil grains, and the critical state is passing from elastic to elastoplastic, which drives volumetric changes in the sample. After that interparticle bonds are broken, a stress strain curve typical for a drained dilatant soil is shown, which is no more depending from the intergranular contact forces of cement. The presence of a substantial bonding action between grains offered by a weak carbonate cementation was therefore confirmed, and a smooth transition between the fully cemented zone and the fully plastic zone occurs [12]. The complete set of tests data are illustrated in Figure 4, where the stress strain curves appears often complicated by the non-uniformity of sample deformation [13]. But this should be considerate usual and not unique to the here described tests. The trial indicates moreover that the share strain range should be chosen carefully. Soil preconsolidation pressure should be applied with caution in such a brittle behavior, as not to favor the breakage of ionic bonds of the weak calcite cement even before the test start.

Figure 4:Shear Stress-Horizontal displacement curves under different normal stress. The initial elastic deformation is due to the cohesion effect of the calcite crystals in the sediment pore spaces. The overlap of all the curves in this first sector confirms the soil uniformity and the test consistency.


Conclusion

The behavior of a natural weak cemented gravel soil was investigated by carrying out a large in situ direct shear test. The applied method can be a practical tool to overcome the problems arising from the inability to test very coarse and cemented soils in the standard shear-box apparatus or using other classical in situ tests. Experimental results show a significant effect of cementation, influencing both the stress-strain behavior and the peak strength at strains beyond those required to fracture the cement bonding. The cementation increases the shear modulus and size of the yield locus, but little effect on initial volume change because of the weak grade of cementation was observed. Although the soil cementation strength was reduced, it was in practice able to hinder the directional forward translation of the concrete monolithic box, affecting the constructive design techniques. Exhaustive knowledges of the site and of its geological history should have been essential for the correct preliminary classification of subsoils and for the planning of geotechnical surveys. Tests conducted in the absence of such geological information may lead to improper estimation of the strength characteristics of the material, affecting the design and construction choices.

References

  1. Del Veneto R (1987) Geomorphological units map scale 1:250.000. National Geological Survey. SELCA. Florence, Italy.
  2. Del Veneto R (1988) Geological map of Veneto scale 1:250.000. National Geological Survey. SELCA. Florence, Italy.
  3. Chadwick OA, Nettleton WD (1990) Soil micromorphology: A basic and applied science. In: Duglas LA (Ed.), Elsevier ISBN 0-444-88302-9, pp. 207-212.
  4. CNR-UNI 10006 (1998) Road construction and maintenance, Land use techniques. Ministry of Environment Decree, p. 88.
  5. CNR 22 (1972) Apparent specific gravity of an in-situ CNR Official Bulletin IV, p. 15.
  6. ASTM D4554-12 (2012) Standard test method for in-situ determination of direct shear strength of rock discontinuities. ASTM International. West Conshohocken, USA.
  7. ASTM (2011) Standard practice for classification of soils for engineering purposes (Unified Soil Classification System). American Society for Testing and Materials ASTM International. West Conshohocken.
  8. Terzaghi K (1942) Theoretical Soil Mechanics. Wiley, New York, USA.
  9. NAVFAC (1986) Design manual 7.2-foundations and earth structures. SN 0525-LP-300-7071. Naval Facilities Engineering Command. Washington, USA.
  10. Swiss Standard SN 670 010b (2000) Characteristic coefficients of soils. Federal Institute of Technology in Lausanne. Lausanne, Switzerland.
  11. MnDOT (2007) Pavement Design Manual. Section 3.2 Subgrade Soils. Minnesota Department of Transportation. St. Paul, Minnesota, USA, p. 39.
  12. Lade PV, Trads N (2014) The role of cementation in the behavior of cemented soils. Geotechnical Research 1(4): 111-132.
  13. Liu MD, Airey DW, Carter JP, Xu JK (1999) Explicit stress-strain relations for an artificial cemented carbonate sand. In Pre-failure Deformation Characteristics of Geomaterials, Balkema. Rotterdam, Netherlands.

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Thursday, December 9, 2021

Intercultural Communication Problems of Nigerian Students in Mainland China_Crimson Publishers

 Intercultural Communication Problems of Nigerian Students in Mainland China by Dorathy Onyinye Achu in Archaeology & Anthropology:Open Access_journal of archaeological science abbreviation


Abstract

The advancement of globalization and development of the Sino-African framework has increased migration of Nigerian students in search of foreign education to China. On arrival, these students are faced with very many challenges and difficulties. Cultural differences and personal adjustment problems has affected the Nigerian students language acquisition and adjustment patterns, creating an urgent need to proffer Solution to this inter cultural communication problems. This research focuses on the intercultural communication competence of Nigerian students studying at various Universities in China and explores through literature and practical research; the reason behind their lack of smooth integration within the Chinese society, the frequency of interactions with the Chinese nationals, difficulties encountered, reasons attributed to these difficulties, and the different coping method employed.

The investigative Results reveals that majority of the Nigerian students have no prior socio-cultural knowledge of the host country, and have problems in their Social, education cultural and personal adaptation patterns, which they attribute to lack of intercultural communication knowledge, culture shock, ethnocentrism, racial discrimination, differences in nonverbal communication between countries. Findings suggests the following; an Expansion & Restructuring of the Confucius Institute in Nigeria to fit the growing Chinese language population in Nigerian, need for an extensive theoretical and practical Chinese cultural studies through organization of inter and extra-curricular activities, introduction of a multi-cultural curriculum, embedment of the intercultural studies into the language curriculum, and most importantly is for orientation programs to be organized by the embassy prior to students departure.

Keywords: China; Cultural adaptation; Globalization; Intercultural communication; Nigerian students

Abbreviations: BRICS: Brazil, Russia, India, China and South Africa; GDP: Gross Domestic Product; PRC: People’s Republic of China; CSC: China Scholarship Council

Introduction

Studying in a multicultural environment has turn out to be overwhelmingly popular globally. For decades, it has been a popular method of exposing students to international perspectives [1,2]. This is because; students attending university overseas have the opportunity to discover novel cultures and environments [3] and to reflect on their own culture’s shortcoming [4]. Based on the fact that communicating with others that come from different cultures is an invaluable skill for any international student [5]. In the decades since 1950, political, social, and technological barriers have been diminished by globalizing forces that are fueling the economies of high-growth nations such as Brazil, Russia, India, China and South Africa (commonly referred to as BRICS), leading to an international convergence in economies and narrowing the asymmetries between developed and developing nations [6]. Education and cultural communication are a formidable pivot in that convergence, which has been further accentuated by the worldwide flows of students and by the pervasive dissemination of core knowledge, which Badaracco [7] delineates as migratory and embedded. Such flows have major implications for the well-being and competency of participants on the worldwide landscape, especially those in the University [8,9]. This is because the cultural difference comes with diverse responsibility, and sometimes it feels like one is struggling alone. Imagine leaving a familiar terrain to go into an unfamiliar territory where everything ranging from language, culture, food and so on, seems different and you are struggling so hard to understand how things operate. It is like taking a giant leap into the unknown. Globally, cultures have their own values, individual traditions, beliefs and norms, which can surely make them unique from each other. As a result of diverse culture and community practices, the sojourners always face culture shock when they first get to the host nations.

Speaking of host nation, recently China has been a hub for a vast majority of International students. Having come a long way since it became the People’s Republic in 1949, and as an emerging nation, with a record two-digit growth rate of the Gross Domestic Product (GDP) every year until 2014, its association in the group of emerging newly industrialized and developing economies (BRICS), has made it a world leader in the economic front. China is Africa’s biggest economic partner, followed by France and the US. Besides its commercial and economic involvements, education is also a great component of the Sino-African Framework. Twenty years ago, a political scientist named Gerard Segal wrongfully predicted that Africa would be “the least important region for China” [10]. As of 2009, China has surpassed the United States as African’s largest trade partner [11]. The linkage between Africa and China goes back to the 10th century, although the media and international civil society have only become aware of Sino-African relations this past decade. China has made significant improvement in the aspect of offering scholarship to African students. Currently China is coming up on the list of preferred places Nigerian students or African students in general prefer to study. Since 1960, France has been the major hub of the African student body, and this comes mainly from former French colonies. England, which has a majority of Nigerians and Kenyans, is a major destination for the English colonies, while Portugal is the main destination country for Mozambicans, Cape Verdeans and Angolans. Spain is the main destination country for Equatorial Guineans. Hence it could be calculated as the first destination for Sub-Saharan Africa, is Western Europe: France (21%), United Kingdom (12%), Germany (6%) and Portugal (5%). In 2000 China announced, among others, the creation of the Confucius institutes; cultural and linguistic centers in Africa, and a doubling of study grants for Africans, principally in the areas of medicine, agriculture, languages, education, economics and management. In 2009, 49 African countries adopted an action plan for 2010- 2012 with China, this intensified both University and Scientific cooperation, and increased Chinese government grants to 5,500 African students in 2012, and 100 joint research and development projects to promote Chinese language in Africa. The action plan that was signed in 2012, against 2013-2015, was meant to provide for 18,000 student grants and development of the Confucius institutes (University world News Report 2013). Currently China’s intent is to offer 50,000 government scholarships to African students, invite 200 African scholars to annual visit, offer 500 young Africans study trip to China, and provide 2,000 educational opportunities with degrees and diplomas [12]. These figures are quite impressive considering, the increase in scholarship for African countries from 2011 till now.

Some sources quoted the numbers of African students on Chinese scholarship were from 922 in 1996 to 7821 in 2014 [13,14]. Based on the paradigm switch in bilateral relations as well as the growing economic importance of Nigeria, as can be seen in mid- 2016, it overtook South Africa as the largest economy on the African continent and is recently viewed as having the potential to emerge as a major global economy. However, a substantial dependency on oil revenues has radically undercut this potential. Just as there has been a marked increase in the total influx of foreign students into China, so has there been an increase in the number of Nigerian students in China. Nigeria is one of the developing countries with higher priority on education and many Nigerian students can now access their preferred fully funded higher education programs and Chinese language programs in China. As such, every year numerous Nigerian students enroll in Chinese universities, and the number keeps soaring. As a result, in the twenty-first century Chinese educators are finding their classrooms filled with students from diverse cultures. This increase in Nigerian students studying in China is as a result of the establishment of the Forum on China- Africa Cooperation that was established in 2000.

The forum was encouraged in part by the burgeoning, diverse relationships between the People’s Republic of China (PRC) and Africa, which continues to send many its students to China. And the soaring figures of Nigerian students in China provide a beachhead for including Nigerian youth in the development of Nigeria and the building of a stronger relationship between Nigeria and China. Additionally, it is plausible that China’s interest in sharing its culture and language with the Nigerian youth, enrolled via the China Scholarship Council (CSC), is that China trained Nigerians may in the long run serve as volunteer ambassadors of Chinese culture. While this idea and studying in China may sound so exciting the cultural differences among students have a significant impact on the learning, communication process, and understanding between Chinese and Nigerian students. Speaking of cultural shock, in a psychological MA thesis based on an investigation of 181 feedbacks out of 210 forms, a rather high ratio for an investigation. The author aim of the study was to examine cultural shock and adaptation among African students in China. It found that cultural shock is common for African students in China, and the best remedy is to increase social contact with local people. It also found that although all African students experienced cultural shock, the extent is different according to the grade and gender, e.g., more serious for undergraduates than graduates, female than male [15-18]. Other studies are either on cultural adaptation, cultural differences and their impact, or different concepts of time and family. In order to solve this culture shock, Anderson [19] asserts that students need guidance when identifying diverse cultural traditions. A brief study of the Nigerian, Chinese Culture, people and their behavioral pattern, will give an insight to why these students face such Challenges in China, and how to quickly adapt to the new environment.

Methodology

The descriptive survey design is chosen for this research, while a quantitative and qualitative research approach was employed. A sample size of two hundred and fifteen people (215) was used to represent all Nigerian students in China, and 10 people were randomly selected for interviews. Instruments for data collection include Observation, questionnaire and interview. For this study, two instruments for data collection were used; questionnaire and interview. The questions were all close ended questions and consist of two sections. It was designed this way to make analysis simple and less complicated. The first section is from question 1-25 and comprise of both the single and multiple, choice questions, while the second section consist of 25 questions ranging on a scale of 5 (Not difficult, slightly difficult, comparatively difficult, Difficult, very difficult). The Interview was carried out by direct contact and through telephone.

A Purposive sampling was chosen as the best fit for this research, as participant need to

a. Be a citizen of Nigeria.

b. Be studying in any University in China.

c. Be a registered Chinese Language Program/Bachelor degree/Master degree student.

d. Be willing to co-operate and partake in the research.

Anonymity and Confidentiality was key in the course of the research. Student’s anonymity was promised and ensured during the course of this research, this led to their turnout and appropriateness in filling the survey.

Findings

Respondent’s demographic profile

From the data obtained, male respondent were, one hundred and twenty-nine (129), females were eighty-six (86), which is sixty percent 60% and forty percent 40% respectively. This gives a total of 215 respondents. The gender of respondent is indicated in the A pie chart below (Figure 1). The age of students were also taking into consideration. It was observed that from age 18-24 had a majority of one hundred and five people (105) making up 48.84% of the population, while 25-29 age range was the second highest, with a total number of 70 people making up 32.56%, while 30-35 age range had 27 people making up 12.56%. Student less than 18 years of age and greater than 35 years of age had the least number with a total of 6 and 7people respectively, making up 2.79 and 3.26 respectively in the B pie chart. The C above shows the number of years spent in China. It was observed that majority of the student (90 people) have spent 1-2 years in China, making up 41.86% while 58 people have lived lesser than 1 year in China, making up 26.98%. There is a downward trend after having lived for 2 years, it is observed that the higher the years, the lesser the number of Nigerian students, as 57 people have stayed 3-5 years, making up 26.51%, and only 10 persons has stayed over 6 years- 4.65%.

Figure 1:Distribution (%) of gender, age, and duration of stay in China..


Respondent’s language proficiency

The first objective of this study is to find out the Cultural communicative Problems of the Nigerian student in China. In view of this, the following questions were asked to elicit information on their Chinese language ability (Figure 2). Chart D gives the duration of Chinese language study. 51 people (23.72%) have studied for less than a year, while 90 people (41.86%) have studied between 1-2 years, while 68 people (31.63%) have studied the language between 3-5years, and just 6 people (2.79%) have studied between 6-10 years.

It was important to note if the Nigerian students had prior knowledge of Chinese language before coming to China. The result from E states clearly that 120 people (55.81%) representing majority of the Nigerian students had no prior Knowledge of the Chinese language, while 95 people (44.19%) had a basic knowledge of Chinese language. When asked if Age has a correlation with their Chinese ability, since majority of the Nigerian students in China are teenagers in their youthful stage. It’s interesting to note that 57 students (26.51%) agreed that their age influences their language learning while 158 students (73.49%) said age has no correlation with their language ability. G shows 130 students (60.47%) do not believe that their language ability diminishes with age, while 85 students (39.53) believe and agreed that their language ability diminishes with age.

Nigerian students adjustment problems

In Chart H Students were asked if they had communication problems with the Chinese. 156 (72.56%) Students responded yes, while 59 students (27.44%) said they didn’t have a problem of communication with the Chinese (Figure 3). In-order to understand their communication problems, its important to understand the language area they find problematic, frequency at which they use the Chinese language, Ease at which they communicate with the Chinese nationals, and their interaction pattern. 113 students (52.56%) reportedly found writing characters to be the hardest and most difficult, followed by Grammar which 58students (26.98%) also found to be difficult as it affects both their orals and writing. 22 students (10.23%) indicated orals while 22 other students found listening to be their major problem.

Figure 2:Respondent’s duration of chinese study, prior knowledge of chinese lang., age correlation and ability of language study to diminish with age.


Figure 3:Distribution of students having Chinese communication problems and the various aspects of difficulties.


Language barriers affecting inter-cultural communication: The chart J shows the most frequently used language Nigerian students use in communication with co-nationals, Africans, Chinese students and other nationals in China. 154 students (71.63%) chose English, 41 students (19.07%) chose Chinese language, 18students (8.37%) chose Igbo, and 2students (0.93%) chose Yoruba. Chart K shows how many Chinese friends the Nigerian students have. It is clear that the majorities have Chinese friends, but the number of friends varies as 102 students (47.44%) have over 6 Chinese friends, 60 students (27.91%) have 3-5 friends, 47 students (21.86) have over 6 Chinese friends, 60 students (27.91%) have 3-5 friends, 47 students (21.86) have 1-2 friends while 6 students (2.79%) do not have a Chinese friend.

Chart L tells us how often they spend in the company of their Chinese friends. 23students (10.7%) hang out daily with their Chinese counterpart, 34 students (15.81%) hang out 2-3times in a week, 47 students (21.86%) hang out once in a week, 15 students (6.98%) hang out every fortnight, and 96students (44.65%) only hang out once in a month (Figure 4). Chart M tells us what kinds of conversation are usually exchanged between the Nigerian students and their Chinese friends. The graph below gives us a good detail of their conversational pattern. B Language Preference and Ease of Communication Students were asked upon arrival to China, which group of people did they looked forward to mingling and making friends with. 59 students (27.44%) indicated Africans, 56 students (26.05%) looked forward to the Chinese as friends, 51 students (23.72%) preferred Nigerians and 49 students (22.79%) looked forward to making friends with other nationals (Figure 5). Chart O further explains whom students found it easier communicating with. 87students (40.47%) found it easier communicating with their fellow Nigerians, 66 students (30.7%) found it easier communicating with Africans, 36 students (16.74%) found it easier communicating with other nationals, while 26 students (12.09%) found it easier communicating with the Chinese.

Figure 4:Showing most used language, number of chinese friends, frequency of hangouts and topics discussed.


Figure 5:Showing preferred friends and their ease of communication with respect to country..


Cultural & personal barriers affecting inter-cultural communication: P-highlights the aspect of culture that impacts the Nigerian students’ Chinese socio-cultural interaction. Students were allowed to pick more than one variable they think had an impact on their social cultural interaction. 57.21%, consisting of 123 Students indicated Social culture as the biggest factor, 48.37% comprising of 104 students indicated food culture, 44.65% comprising of 96 students indicated educational culture, 35.81% comprising of 77 students indicated National culture, another 35.81% indicated environmental culture, other factors can be seen as represented (Figure 6).Knowing fully well that students find different aspect of culture problematic, Chart Q- shows the aspect they would like to improve on. 43.72% would like to improve their knowledge on the Chinese educational system, 40.93% would like to improve their knowledge about the Chinese National culture, 36.74% would like to improve their knowledge about their environmental culture, 31.16% would like to improve their knowledge on the Chinese family and social culture, the rest is represented below starting with the highest % moving in a downward trend. R-shows some non-verbal communication problems student encounter during communication. 51.16% comprising of 110 students encountered difficulties associated with paralinguistic, 41.4% comprising of 89 students had some gestures related problems, 29.77% comprising of 64 students had challenges with the Chinese Head and Body movement, others include the use of hands, space, time, graphically represented above. These personal barriers in S- has a relationship with an individual’s personal attitude during communication. Students were asked personal reasons why they find it difficult to contribute or successfully hold a conversation with the host national. They had the option of selecting more than one reason. Their reasons are represented in the graph.

Figure 6:Showing cultural aspect affecting socio-cultural interaction, areas they’re willing to improve on, Nonverbal problems and individual barriers affecting cultural communication.


Educational barriers affecting student’s academics: In Figure 7, students were asked what type of barriers affected them education wise and were allowed to pick more than one option. These barriers could be either from the students or teachers and obstruct smooth teacher-student communication flow. The barriers listed as a lot to do with their language and Exams. The result shows that 50.23% comprising of 102 students owed it to the Language difference, 46.51% owed it to their incorrect Tone, 40.93% comprising of 88 students owed it to their Unfamiliar Accent, 28.37% comprising of 61 students said it was due to their low vocabulary buildup, 21.86% comprising of 42 students allege it was due to their low language proficiency, 20.93% comprising of 45 students indicated it was due to their poor communication skills, others reasons are graphically represented (Figure 7).

Figure 7:Students educational barriers.


Social barriers affecting inter cultural communication: This has to do with the social environment factors in china. Nigerian students were asked what kind of social barriers hindered their successfully interaction and communication with the Chinese nationals and were allowed to choose multiple options. 53.02% comprising of 114 students indicated Racial discrimination to be a major social barrier, 44.65% comprising of 96 students indicated a difference in perception & Viewpoint, 26.51% comprising of 57 students chose stereotype, 26.05% comprising of 56 students indicated misinterpretation of non-verbal actions, 23.26% comprising of 50 students indicated culture shock, 22.79% comprising of 49 students owed it to politeness, 8.84% comprising of 19 students indicated gender was a barrier. This reason associated with social factors is graphically represented (Figure 8).

Figure 8:Showing socio-cultural barriers.


Socio-cultural adaptation

This covers the second part of the questionnaire. Here students were asked to choose between a 5point scales ranging from not difficult - A little difficult - Comparatively difficult- Difficult- Very difficult. It’s clear from the 25 questions, students find “Dealing with Discrimination (3)” the most difficult, as this had the highest average score. “Weather in China (2.79)”, was the second most difficult, while “Seeing things from china point of view (2.73)” came third. “Dealing with unsatisfactory service (2.71)” was fourth, and “Dealing with someone who is unpleasant (2.62)” came fifth. Other adaptation problems are listed in the graph (Figure 9).

Figure 9:Graphical representation of students socio-cultural adaptation.


Emotions & feeling

Students were asked how they felt when they encounter barriers or challenges. It’s glad to see that 52.56% remained positive and are creatively looking for strategies to deal with the situation. 33.95% feels the need to give up, 30.95% feel frustrated and disappointed. Some students feel quite comfortable, while others feel embarrassed, and depressed. These are well represented in the Table 1.

Table 1:Nigerian students emotions & feelings.


Coping Pattern

Since we know the challenges and barriers these students face, it’s also important to know how they overcame it. Students were asked how they cope with misunderstanding and difficulties. 44.19% comprising of 95students said they withdrew in the face of difficulties, 41.86% comprising of 90 students indicated Avoidance, 22.79% comprising of 49 students had to compromise, 15.81% comprising of 34 students integrated, 13.02% out of 28 students had to isolate themselves, 11.16% comprising of 24 students confronted their difficulties, other coping methods are represented in the Table 2.

Table 2:Coping methods of Nigerian student.


Analysis of Findings

Based on respondent profile

Chart A in Figure 1 shows a higher % of males (60%) to females (40%). This goes to prove the gender inequality in the educational aspect that is eminent in Nigeria, while chart B shows that majority of the Nigerian students in China are youths in their early stage.

Based on language ability & competence

From Chart E in Figure 2 it is observed that majority (73%) of the Nigerian students do not have Prior Chinese Knowledge before coming to China. They either learnt or acquired the language upon entry into China. This could be due to lack of expansion of the Confucius institute, as there are only 2 recognized Confucius institute, one in University of Lagos in the West and the other in Nnamdi Azikiwe University Anambra state in the East with two branches. This is not enough to serve a growing population of Over 180 million people located in 6 geographical zones. From Chart D, we can tell the Nigeria students only have a basic knowledge of the Chinese language as majority have only studied for 1-2 years. Although the Nigerian students are known to be fast learners when it comes to learning Chinese, but this does not guarantee cultural competence.

Age has been argued by many researchers to have a relationship with language study. Fig 6 confirms that Age currently has no role in the Nigerian students (Youths) language ability. This could be because most of them are youths (18-35years) in their early stage when the brain is active and ready to work. It could also be as a result of their belief; that the youthful stage is a time to achieve all one sets his/her mind on. However, 60.47% agreed that ability to study does diminish with age. This is well understood as a Child learns and acquires a language easier and faster than an adult. Chinese language is not only interesting and Unique, but a major barrier to inter-cultural communication. It’s writing style that has a long history seems to be an uphill task for 53% majority of the Nigerian students as indicated in Chart I, while grammar is the major headache for 26.98%. Their inability to type characters already limits their social interactions as they cannot send messages, or chat on the Chinese social networks. Their grammatical incompetence affects both oral and written ability.

Based on educational, social and cultural and personal adjustment

It is evident from the above investigations that the Nigerian Students would love to increase their Chinese educational Knowledge. Difference in language poses a challenge to the Nigerian student. They often do not answer questions or actively participate in class due to problem of accents and language difference, but take their course works seriously. They try to avoid mispronunciations, and dramas while in class. While Silence is considered a virtue in the Chinese Classroom, a highly interactive class, open to discussion, where students are free to ask questions is prized in the Nigerian classroom. The Use of Language also causes lack of comprehensive note taking, and ineffective interaction in class. Some researchers like Pruitt [20] stated that African students have a problem with the host country examination format, while Arubayi [21], Okwudishu [22] states that Nigerian students have a problem with open-ended questions. This is in contrast with the Nigerian student in China. A large percentage of the Nigerian students in China seem used to the Chinese Examination format and grading system, as these ranked low in Figure 7. Students acknowledge fairness during grading, and majority didn’t see this as a problem.

Although the Chinese teachers are often times very simple, casually dressed, and ride on bicycles, yet the Nigerian students still do not understand the concept behind the informal dressing, as they do not have an informal relationship with their teacher. This could be as a result of no personal interest from the teacher, as a lot of Chinese teachers lack basic information about Nigeria and Africa as a whole. This perception to an extent affects their educational adjustment. To facilitate educational adjustment, it is suggested that teachers know their students, take personal interest in them and guide them on how to successfully tackle and complete the course [23]. Socially, the Nigerian students are very friendly, yet view Racism as their biggest Socio communication difficulty, and find it extremely difficult dealing with discrimination. Although they have many Chinese friends, yet the rarely hang out with them. Their inability to socialize is a clear indication of their outward expression to unpleasant situation [24-26].

Culturally, both countries are both Communalist, yet their style of communalism varies to a great extent. The Nigerian students cultural problems arise as a result of lack of theoretical/classroom cultural knowledge. There have both physical and culture bound problems, this range from difference in perception and viewpoint, misinterpretation of non-verbal cues to adapting to the weather in China, food, etc [27,28]. The Nigerian students try so much to overcome these challenges, their outward expression speaks volume, and their reaction is clearly seen in their different coping patterns. They remain positive, in the face of challenges looking for a creative way to deal with their problems [29-32].

Conclusion

The main purpose of this study is to investigate and analyze the cross-cultural communication problems affecting Nigerian students in China. The researchers intend to identify the nature of the communication that exists between Nigerian students and their intended nationals and the various coping methods used to overcome the difficulties of communication. The electronic questionnaires were sent to different Nigerian student groups through Chinese social media. The researchers used descriptive research methods and surveys to collect data from students [33]. A well-designed closed questionnaire was distributed to student groups, and a total of 215 respondents took the time to respond appropriately. Another goal is to study their behavioral patterns and coping methods. Nigerian students show positive and negative coping styles. Their negative coping methods include withdrawal and avoidance, while positive coping styles include confrontation and compromise. They also feel creative need to devise strategies to deal with new and unpleasant situations. Cross-cultural communication and challenges coexist, although it can be seen from this study that Nigerian students face social, educational, personal and cultural difficulties. 72.56% of Nigerian students said they had problems communicating with Chinese citizens. This reflects two core issues, cultural adaptability and language proficiency. Most Nigerian students have problems in adapting to certain sociocultural aspects, such as dealing with discrimination, seeing things from a Chinese perspective, and dealing with unpleasant people. More than half of Nigerian students say Chinese citizens have a negative perception of them and are subject to racial discrimination. Such perceptions may stem from their assumptions about cultural similarity or the misinterpretation of nonverbal behavior.

The Chinese style of ethnocentrism, stereotypes, lack of understanding of blacks/Africans could be the reason why the Nigerian students feel discriminated. Second is the language problem. Most Nigerian students are Basic Chinese learners, and 71.63% of the Nigerian students in the host country communicate in English. It is clear from the study that language fluency is an obstacle because most Nigerian students are Basic and intermediate learners [34]. This affects their social interaction and the topics to be discussed. It also affects their active participation in the classroom, as they seem to perform well in group discussions and assignments. Their daily use of English language impacts their friendship model, social and cultural behavior with the Chinese citizens. Although most Nigerian students blame it on Chinese discrimination, language barriers cannot be overlooked. When the problem of language barrier is solved, the problem of misunderstanding, thinking, ethnocentrism, prejudice, etc. will be reduced. In the Socio-adaptation aspect, apart from China’s weather and food, Nigerian students have no difficulty adapting to China’s environmental conditions; during social interactions, its noted that they have over six Chinese friends, but they hardly ever hangout with them.

They have had difficulties in maintaining friendship with Chinese citizens; their frequency of hangout is at most once in a month. Also Nigerian students seem to have some unrealistic expectations for their teachers and administrators in their communication with schools. Lack of listening seems to be an obstacle, and they want teachers and administrators to be able to listen to them. Accents also seem to affect their communication skills. The changes in education policy are not communicated in advance, and most of the information is communicated halfway through the semester, which is a big problem for most scholarship students. The age, gender or degree of Nigerian students has no direct impact on their experience and challenges, as they all meet the same challenges. However, the longer they stay, the better their adaptation will be. When they encounter difficulties, some students think it is necessary to develop strategies to deal with this situation, and show positive behavior, such as Confronting and compromising. At the same time, some others feel frustrated and disappointed, opting for withdrawal and avoidance, and they withdraw into their ethnic enclaves. Positive changes in the face of difficulties will eventually result in better adaptation and other benefits. These experiences will help to broaden the horizons of Nigerian students so that they can accommodate others and provide them with the skills they need to succeed in the global marketplace.

Acknowledgement

This work was carried out in the overseas college of Xiamen University Xiamen China. The author gratefully acknowledges the support of Prof Pan Chao qing and fellow Nigerian students in China.

References

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  2. Zhai L, Scheer SD (2002) Influence of international study-abroad programs on agricultural college student. Journal of International Agricultural and Extension Education 9(3): 23-29.
  3. Drexler DS, Campbell DF (2011) Student development among community college participants in study abroad programs. Community College Journal of Research and Practice 35(8): 608-619.
  4. Miller EJ (1993) Culture shock: A student’s perspective of study abroad and the importance of promoting study abroad programs. Paper presented at the Annual Intercultural and International Communication Conference pp. 25-27.
  5. Waco K (2008) Study abroad: Fisheries in a global environment. Fisheries 33(1): 38-39.
  6. Spence M (2011) The next convergence: The future of economic growth in a multispeed world. Farrar, Straus and Giroux, New York, USA.
  7. Badaracco JL (1991) The knowledge link: How firms compete through strategic alliances. Harvard Business School Press, Boston, Massachusetts, USA.
  8. Klomegah RY (2006) Social factors relating to alienation experienced by international students in the US. College student journal 40(2): 303-315.
  9. Lee J, Rice C (2007) Welcome to America: International student perceptions of discrimination. Higher Education 53(3): 381-409.
  10. Segal G (1992) China and Africa. The annals of the american academy of political and social science 519(1): 115-126.
  11. Alessi C, Hanson S (2012) Expanding China and Africa oil ties. Council of Foreign Relations.
  12. Ehizuelen MMO (2019) Education and skills development cooperation. Frontiers of Education in China 13(4): 553-600.
  13. Liu H, Li A (2014) Evolution of the chinese policy of funding african students and an evaluation of its effectiveness, Draft of UNDP Project.
  14. Wan X (2015) The trend of China’s aid to african education. NORRAG News, Switzerland. 52: 133-135.
  15. Hull WF, Klineberg (1979) An international study of adaptation and coping. Praeger, New York, USA.
  16. Tugba S (1984) Intercultural communication problems of nigerian students in the portland metropolitan area: A comparative study of a review of literature and personal interviews. Dissertations and Theses. p. 3420.
  17. Disima (2004) Cultural adaptation of foreign students in China. Nanjing Normal University, China.
  18. Oppong CO (2016) Education and intercultural relations: a case study of Ghanaian and Nigerian students in Finland. University of Eastern Finland, Europe.
  19. Anderson A (2003) Women and cultural learning in Costa Rica: Reading the contexts. Frontiers: The Interdisciplinary Journal of Study Abroad 9: 21-52.
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  21. Eric AA (1981) Perceptions of problems identified by nigerian students in american higher institutions: A comparative analysis. Personnel Abstracts, College Student Journal 15(2): 116-120
  22. Okwudishu, Appolonia U (1983) The Goals, objectives and problems of nigerian students in certain U.S. Universities, Southern Illinois University, USA.
  23. Helen C, Ozawa M (1970) Foreign student in the united states. School of social work, University of Wisconsin, USA.
  24. Alexander AO (2011) Cultural faces of interpersonal communication in china and nigeria. 8: 225-247.
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  32. Xia L, Lijun X (2014) The influence of Sino-African cultural difference on the education of African students in China: Taking angola students as the example. Journal of Chongqing University of Education 27(1): 133-136.
  33. Jane Marshall (2013) University world News Report.
  34. Ye Shuai (2011) A comparative analysis of the cross-cultural communication based on the Somali students and the chinese students on time and family concepts. Kexue Wenhui 11: 30-31.

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Wednesday, December 8, 2021

Posterior Urethral Valve_Crimson Publishers

 Posterior Urethral Valve by Najia al hojaili in Research in Pediatrics & Neonatology_The Journal of Pediatrics


Abstract

Posterior urethral valve (PUV) disorder is an obstructive developmental anomaly in the urethra and genitourinary system of male newborns [1]. A posterior urethral valve is an obstructing membrane in the posterior male urethra as a result of abnormal in utero development. It is the most common cause of bladder outlet obstruction in male newborns. PUV may cause the kidneys to swell-this is called antenatalhydronephrosis and is a common problem for babies in the womb. Occasionally, this causes more serious problems. Boys with PUV may be more likely to get urinary tract infections (UTIs) when germs get into the urine and cause infection and illness. These are treated with medicines. In some cases, boys with PUV get a serious infection in their kidneys or in their blood. PUV may cause vesicoureteral reflux (VUR)- when urine refluxes (goes back up) the wrong way towards or into the kidneys.20-30 of patient had renal failure even if treated

Epidemiology

In the United States, PUV is the most common cause of lower urinary tract obstruction in male neonates; the reported incidence ranges from 1 per 8000 to 1 per 25,000 live births.

Case Presentation

F.T 2.9 kg, 11 days old, shifted from another hospital as a case of PUV and bilateral hydronephrosis.

Product of a mother 45 years G8 P6+1, hepatitis B carrier, negative consanguinity (baby received hepatitis vaccine and immunoglobulin.in his hospital.

Investigation

CBC: was normal

Chemistry sent

Echocardiogram was done PFO, mild PS

Seen by urology and booked for operation

Antenatal diagnosis

The widespread use of antenatal ultrasonography (US) has enabled diagnosis of posterior urethral valves (PUVs) in many more individuals. Patients who have PUVs that are not diagnosed on antenatal US and who do not present with overt urinary pathology are at risk for delayed presentation of PUVs.

Differential diagnosis

A. Neonatal hydronephrosis

B. Urnary tract infection

C. Viasicoureteric Reflex

D. Renal failure

Management

Treating before birth

In most cases, there is no treatment before birth. In a small number of cases, and only when the level of amniotic fluid (or liquor) around the baby has dropped, a surgical procedure called a vesico-amniotic shunt is recommended during pregnancy. This operation is always done by trained healthcare professionals in a specialist center. A tube (the shunt) is inserted through the mother’s abdomen and into the baby’s bladder. This aims to drain urine out of the baby’s bladder and into the amniotic fluid. This reduces the effects of pressure and helps the baby’s lungs to develop normally. Your healthcare team will talk to you about the risks of the procedure and the risks of not doing the procedure, so you can make an informed decision. Our case admitted in NICU operated in 2nd day of admission there was UVC+ circumcision+ vasectomy, Urethra was edematous with blood spot and debris. Many attempts done and scope was not clear. Pt. developed desaturation b/o diffusion of saline from urinary bladder to periton and try to empty the bladder, Route was blocked by edema, so vasectomy done, and Foley’s catheter inserted, fulguration was failed [2,3].

Baby return from OR on mechanical ventilation. Sepsis work up was done, Baby on Meropenam and Ditropan. Creatinine starts to rise, and baby developed generalized edema and anuria, thrombocytopenia

Hypertension, IV fluid adjusted according to IWL + Urine output

ID consultation was done continue Meropenem and Bactrim

For LP when it is possible. To do CT brain with contrast r/o CNS infection

Nephrology consultation done: their impression was obstructive Uropathy

Plan to do HD only if:

1. Refractory acidosis

2. Refractory hyperkalemia

3. Sign of fluid overload (pulmonary edema).

Serial renal US was done which showed increase in parenchymal echogenicity with grade II nephropathy and enlarged both kidneys with marked dilated calycle system and both ureters. BL/c came Burkholderia cepacian Bactrim was added and dose adjusted. Baby went for 2nd OR, 2nd exploratory laparotomy and cystoscopy they found UB perforation. And then bed side contrast was done there was bladder extra vacation of contrast, no intrapretonial fluid. Urgent bilateral nephrostomy was done guided by US.in Al-Noor hospital. Dye was injected there were bilateral hydronephrosis and no connection with urinary bladder After nephrostomy baby improved dramatically creatinine go down, urine output calculated from nephrostomy, IVF adjusted, baby ex-tubated to room air, vitally stable. Planned by urology team to do nephrostogram which was done and showed; RT nephrostogram shows dilated tortuous Rt. ureter and pelvicalceal system, the contrast reached the distal RT ureter but did not pass into the bladder. LT nephrostogram shows severely dilated tortuous LT ureter and pelvicalceal system and contrast passed into bladder. Planned by urologist to clamp the Lt. nephrostomy to allow passage of urine to UB but if LT ureter increase in size or creatinine increase open the clamp (It was successful attempt the baby pass urine from bladder). For removal of Lt nephrostomy. Their plan to do RT nephrostogram and if passed urine to UB to remove Rt. nephrostomy and to do fulguration for PUV Figure 1-2.

Figure 1:


Figure 2:


Complication

A. Lung hypoplasia duo to This happens when PUV cause there to be less amniotic fluid (or liquor), the fluid that babies float in when growing in the womb, than usual. In extreme and rare cases, the lungs do not develop enough for the support to help, and the baby dies before, or shortly after birth. The baby swallows and “breathes in” the amniotic fluid. When the kidneys develop, they start making urine. The baby passes the urine out, adding to the amount of amniotic fluid. If the baby cannot pass urine, there is not enough amniotic fluid-this is called oligohydramnios. In serious cases, this can stop the lungs fully developing-this is called pulmonary hypoplasia.

B. Limb deformity duo to oligohydramnios.

C. Renal failure if PUV is severe.

D. Vesico ureteric Reflex.

Prognosis

Over the past 30 years, the prognosis of children with PUV has steadily improved. In the past, most children were found to have PUV only after presenting with urosepsis or progressive renal insufficiency. Older series demonstrated mortality figures approaching 50% by late adolescence. Today, most individuals with PUV are discovered when antenatal US reveals hydronephrosis. Prompt resolution of bladder obstruction, aggressive treatment of bladder dysfunction, and improved surgical techniques have lowered the neonatal mortality to less than 3%. PUVs are the cause of renal insufficiency in approximately 10-15% of children undergoing renal transplant, and approximately one third of patients born with PUV progress to ESRD in their lifetimes. Early initial presentation, pneumothorax, bilateral vesicoureteral reflux (VUR), and recurrent UTIs after valve ablation are all associated with risk for progression to ESRD

Follow-Up

A check cystoscopy may be done after some time, to make sure the PUV have been completely removed. If they have not, they will need to resect away again. Sometimes they will need an alternative treatment. Kidney function tests check how well your child’s kidneys are working. They include blood tests urine tests. ultrasound scans or other imaging tests, such as DMSA and MAG3 scans-to look at their kidney.

References

  1. Manzoni C, Valentini AL (2002) Posterior urethral valves. Rays 27(2): 131-134.
  2. Heikkilä J, Holmberg C, Kyllönen L, Rintala R, Taskinen S (2011) Long-term risk of end stage renal disease in patients with posterior urethral valves. J Urol 186(6): 2392-2396.
  3. https://www.infokid.org.uk/

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A Close Look at the Application of the Yin-Yang- Based Acupoint Pairs_Crimson Publishers

A Close Look at the Application of the Yin-Yang- Based Acupoint Pairs by Tong Zheng Hong in Advancements in Bioequivalence & Bioavailabi...