European Journal of Scientific Research
Volume 143 No 2
Effect of Strain Rate on Tensile Strength of Natural Fibers
Sagar Chokshi, Piyush Gohil, Vijaykumar Chaudhary and Chirag Patel
Natural fibers are the good alternative to synthetic fibers because they are environmentally more efficient and beneficial. Fibers are load-carrying member in natural fiber composites. Hence, it is required to study the behavior of fiber against different strain rate. In the present study, an attempt has been made to observe the behavior of natural fibers by varying the strain rate and observing its effect on tensile strength. For this purpose, natural fibers like bamboo fiber yarn, banana fiber and cotton fiber yarn were procured and characterized to measure tensile strength by varying strain rate in the range of 1 mm/min to 20 mm/min. The fiber samples were tested on the universal testing machine. Moreover, it was observed that the bamboo fiber yarn has higher tensile strength than banana fiber and cotton fiber yarn. Furthermore, the mathematical models based on exponential, linear, logarithmic, polynomial and power models were proposed which may be useful to predict the tensile strength with different strain rates. The proposed models were compared with experimental results. Through the comparison, it is suggested to prefer the polynomial model, power model and exponential model primarily to predict the tensile strength at different strain rates.
Keywords: Natural fibers, Strain rate, Tensile strength, Mathematical model, Comparison
Post Chemotherapy Bone Marrow Changes in Acute Myeloid Leukemia
Pankaj Bahadur Nepali
The incidence acute myeloid leukemia (AML) has been increasing over the years. Chemotherapeutic agents used in the treatment of acute myeloid leukemia (AML) cause damage to the hematopoietic environment of the bone marrow initially, followed by stages of hematopoietic recovery. The study of post chemotherapy bone marrow in acute myeloid leukemia (AML) is essential to analyze the response to chemotherapy and also to study the effects of chemotherapeutic drugs on the bone marrow micro environment.
1) To study the changes in the marrow due to chemotherapeutic agents in AML patients.
2) To study the response of leukemia to these drugs.
3) To study and compare bone marrow findings in the post induction phase and maintenance phase.
Materials and methods:
Total 15 cases of AML in the post induction phase were enrolled for the study, out of these 13 cases were followed up in the maintenance phase. Bone marrow aspirate and biopsy slides were studied for these cases.
In the post induction phase bone marrow aspirates were predominantly hypocellular (46%) with normal to increased erythroid regeneration (74%) but decreased myelopoiesis and megakaryopoiesis. The erythroid maturation was mainly in the form of normoblastic(84%) or normoblastic with megaloblastoid changes (40%). Dyspoiesis was present in all three lineages (Erythroid series -46%, Myeloid series - 28%, Megakaryocytes- 28%). In the maintenance phase bone marrow was normocellular or hypercellular (67.8%) with normal to increased erythropoiesis (80.7%) and predominantly normoblastic maturation (83.9%). Regeneration of myeloid series (61.3%) and megakaryocytes (96.7%) was also improved than in post induction phase. In the maintenance phase erythroid and myeloid dyspoiesis were decreased whereas megakaryocytic dyspoiesis was increased than in post induction phase.
Hence the study shows that though the bone marrow is hypocellular in the post induction phase , the cellularity improves during the maintenance phase. In the post induction phase erythroid regeneration appear first followed by myeloid and megakaryocytic regeneration.
Keywords: Post chemotherapy, Bone marrow, AML
Analysis and Performance of a Low Cost Multiple Alarm Security System for Smart Home Based on GSM Technology and Controlling Based on Android Smartphone
Motaz Daadoo, Saed Tarapiah and Shadi M.A Atallah
This paper demonstrates and explains the design and implementation of multiple alarm security system for smart home based on GSM technology and controlling based on android smartphone. Security is an important subject that could be added to a smart home system. Gathering all different security systems such as alarm, the fire alarm, access control, Intrusion Detection System (IDS), etc. makes our life safer. All the security systems mentioned above could be integrated into a smart home system. In addition, there are new available features that let users control objects remotely. Nowadays, most people have their smartphone nearby them; therefore, adding an interface on the smartphone to control an automated system is a big plus. Energy saving is another benefit of the smart home system. It enables us to save energy and cost with having a smart control of the heating and air conditioning system, lighting system, water sprinkler system, solar system, etc. this paper concerns integration of technologies to increase customer satisfaction. It focuses mainly on two parts: The first part is alarm based on Global System for Mobile technology (GSM) to send Short Message Service (SMS) to the owner, the proposed system is aimed at the security of home against theft, Fire, CO and gas. In case of risk the device sends SMS to the emergency number which is provided to the system. The system is made up of basic components: sensors, GSM Module, Arduino, relays to control the device and buzzers to give security alert signals in terms of sound. The second is the controlling part; it uses android application mobile to control the gas valve, the door lock of the main entrance and the PIR sensor. We propose and analyze home automation system that possess high design flexibility, greatly reduced delay time, and high expandability. The result of using the proposed system is improving the efficiency of operation, reducing delay time and cheaper as compared to existing systems.
Keywords: Android Application, Arduino Mega2560, Internet of Things, GSM Technology, Smart Technology.
Crisis Management in University Education from the Perspective Of Administrators and Faculty Members at Jordanian Public Universities
Wafaa Mohammed Ali Al-Ashqar
The purpose of the study is to investigate the level of crises management in university education from the perspective of Administrators and faculty members at Jordanian public universities, and to find out the effect of gender, experience, and academic rank on their perspective. To achieve the aim of the study a questionnaire was distributed among 35 Administrators and faculty members (19 males and 16 females) from four public universities. The questionnaires were collected and data was analyzed statistically using suitable statistics. Results showed that there are statistically significant differences in the administrators' and faculty members' perspective about the level of crises management in university education, it also showed that there are statistically significant differences at (&alph;= 0.05) in the administrators' and faculty members' perspectives about the level of crises management in university education due to the gender variable, and there are statistically significant differences at (&alph;= 0.05) in the administrators' and faculty members' perspective due to experience variable and academic rank variable.
Keywords: Crises Management, Public Universities, Administrators in Universities.
Diachronic study of the spatiotemporal changes of vegetal cover by remote sensing: the case of the province of Benslimane (central Morocco)
Bouchra RACHDI, Mustapha HAKDAOUI, Wadi BADRI, Hassan FOUGRACH, Ahmed EL ABOUDI and Mohammed HSAINE
The role and perception of the forest have largely evolved, it is no longer appropriate space but a heritage where various stakeholders can exercise their rights. This forest heritage has experienced significant changes over time. Doubled by a gradual aridification from the South to the North. These changes have transformed the physiognomy of the forest ecosystem in the province of Benslimane and led to a real therophytisation.
The question is how can we identify and quantify these changes in such a province? It is proposed to answer this question by drawing up thematic and dynamic soil occupation that will allow to evaluate forest cover degradation, understand and follow the evolution and dynamics of spatiotemporal changes in the province on a forty-year period from 1973 to 2013 by remote sensing and geographic information systems.
Keywords: Forest; Benslimane; spatiotemporal changes; Remote sensing.
Influence de la variabilité climatique sur les réserves en eau du sol et dans les systèmes agricoles du bassin côtier de l’Agnéby (Côte d’Ivoire)
Vincent Tchimou ASSOMA, Bernard ADIAFFI and Aimé KOUDOU
Côte d'Ivoire presents a vulnerability to climate change since the decade 1970, due to the challenges of political, socio-economic and demographic that she is confronted. In addition of to this situation, degradation of vegetation cover affects the hydrologic regime. Access to water resources is grown worrying. The study of impact of climate variability in the farming system is curried out from the analysis of climate variables (rainfall, temperature and evapotransration), calculation of climate request and hydrological and climate modeling in INSTAT+. The basin of Agnéby recorded from 1951 to 2002 a break of stationarity in 1968 and 17% of mean rainfall deficit. Rainfall variability is related to climate which is expressed by an increase of air mean temperature about 1°C. The potential water balance has a deficit of 17.5% with an annual rainfall module (1398 mm) below the PET (1694 mm). The available annual reserves have a deficit of 21% compared to the water requirement of the crops. The occurrence of adverse climate factors may lead in loss of agricultural productivity.
Keywords: climatic variability, farming system, water requirement, reserve available, Agnéby watershed, Côte d’Ivoire.
Cancer Du Col Uterin Au Chu De Sidi-Bel-Abbes (Algerie)
Meriem MEDLES and Malika BENDAHMANE
With the world scale the cancer of the cervix is in term of frequency, the second cancer touching the women after the breast cancer, it accounts for 10% of all cancers at the woman with 493 000 new identified cases each year and about 83% of these new cases occur in the developing countries. The objective of our work consists in making a retrospective epidemiologic study between 1998 and 2006 out of 236 old patients from 23 to 90 years, hospitalized on the level of the CHU of SBA for a neoplasy of the uterine collar. The results show that the majority of the cases (92%) presents an epidermoïde carcinoma of the invasive type. of which the most frequent symptom is the appearance of métrorragies (88.7%) and that the frequency of this cancer increases with the age of the women since it is very weak (1,31%) in young women under 25 years old, and very high (95,63%) for the women beyond 35 years old. The menopausal section (46 to 55 years) is more affected and concern 32% of the cases. Among the most plausible factors of risk are; the precocity of the sexual activity and the age of the first child conceived before 20 years old, the multiparity and/or the abortion affected 81,41% of women who had more than 5 pregnancies. In the same way, other factors can be accused such as the repeated genital infections (~23%), ageing (40%) and the socio-economic level low (58%) of which consequences a malnutrition.
Keywords: cancer – uterine collar – neoplasy - age – multiparity – ageing.
Taguchi’s Analysis and Surface Morphology of Coconut Shell Particles filled Hybrid Composites
T. Rangaswamy and Sudeep Deshpande
Application of natural fibers has attracted a great deal of attention among the composite research community in the past couple of decades. In this study, fabrication of E-glass/jute fiber reinforced epoxy composites with an addition of 10 wt.% and 15 wt.% as a filler of coconut shell particles used to study the tribological properties. The wear experiments designed according to Taguchi’s (L27) orthogonal array with three control variables such as sliding velocity, filler content and normal load. Addition of 10 wt.% of coconut shell particles into E-glass/jute fiber reinforced epoxy composites increased the wear resistance considerably and natural waste coconut shell particles can be used instead of ceramic filler in hybrid composites. Increase in addition of coconut shell particles above 10 wt.% decreases the specific wear rate and coefficient of friction. After the thorough analysis of factors, an optimal factor setting has been suggested for specific wear rate and coefficient of friction. Further, the scanning electron microscopy (SEM) images for worn surfaces of hybrid composites were studied. Finally, a confirmation test was carried out to validate the results.
Keywords: Hybrid Composites, Wear Rate, Taguchi’s Analysis, Surface Morphology.
Performance Of A Sequencing Batch Reactor For The Treatment Of Domestic Wastewater
Obaidi Ouidiane, Chaouch Mehdi, Merzouki Mohammed, Taa Najat and Benyahya Mohammed
Water environment pollution has become a major environmental problem recently. Disposal of wastewater to surface or groundwater present a high risk the environment and health public. Therefore, treatment of any kind of wastewater to produce a good effluent quality is necessary. In this regard choosing an effective treatment system stays a real challenge. Sequential batch reactor is a modification of activated sludge process and it has been successfully employed in municipal wastewater treatment. In this work, the sequential batch reactor process (SBR) was applied to treat the municipal wastewater. During the use of this process, many parameters such as sludge retention time (SRT), hydraulic retention time (HRT) and cycle period have been investigated and optimized. From the results, it was found that one cycle per day its suitable for the SBR and increasing HRT from 4 to 22 h, improve significantly the SBR performance. The SBR treatment leads to an efficiency of 96% in terms of COD and 98% in terms of BOD5 removal.
Key words: Domestic wastewater, Wastewater treatment, Optimization control, Sequential Batch Reactor
Economic Life and Religious Communities in Rural Farmers Mangki Pinrang South Sulawesi Indonesia
Dr. Ali Hanafi
This research is motivated by a perception that the educational level is low, then the confidence and productivity is also low. This study aims to reveal and analyze the work behavior, attitude and commitment to the moral values of rice farmers community to meet the economy and religious life. This study used a qualitative method with the descriptive-analytic approach, namely to uncover, understand, and describe in a narrative about the realities of economic life and religious communities rice farmers. Researcher as a human instrument for data collection in the field to complete. Data collected included; work habits, attitude, and commitment to apply the values or moral principles in addressing the needs of the economy and religious life. Data obtained through participant observation, in-depth interviews, documentation, and triangulation. Data were analyzed by using flow-based interactive analysis of descriptive-analytic. Results of the study indicated that people rice farmers with a level of average education completed primary school have a moral consciousness that became determinant factor in forming and self-discovery that workplace behavior and attitude of life is so high is guided to religious values as a cause of increasing the quality of economic life and religious , This study suggests the importance of curing mental attitude of society through the transformation process socio-cultural learning rational and motivated by values (principles) religious.
Keywords: Economic life and religious, hard work, pride.