bluuebunny/crossref_metadata_2025 huggingface dataset:
Heterosis and Qualitative Attributes in Winter Tomato (Solanum lycopersicum L.) Hybrids
Authors: Islam MR , Ahmad S , Rahman MM
Published: July 2012

An investigation was carried out at the Research Farm of Olericulture Division of Horticulture Research Centre of Bangladesh Agricultural Research Institute (BARI) to evaluate the heterotic performance in F1 generation of tomato. The hybrids showed significant variation in heterosis. The highest heterobeltiotic effects were observed in the cross P3 x P8 (-18.46%) for earliness, P1 x P6 (8.57 %) for flowers per cluster, P2 x P6 (21.73%) for fruits per cluster, P6 x P7 (75.54%) for plant height, P5 x P6 (67.44%) for fruits per plant, P9 x P10 (54.82 %) for yield per plant, P2 x P8 (21.21 %) for individual fruit weight, P7 x P8 (3.09 %) for fruit length, P3 x P8 (14.11 %) for fruit diameter and P1 x P6 (13.11 %) for brix content. In respect of fruit external characters like shape, pedicel area, shape of pistil scar, blossom end shape genotypes were found diverse. Internal qualitative character like firmness, fleshiness and less seeded and locule numbers were highly variable among the genotypes. Considering all the characters the crosses P1 x P8, P2 x P6, P2 x P7, P2 x P8, P3 x P8 and P5 x P6 were found suitable for further studies to variety selection. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11175 Bangladesh J. Agril. Res. 37(1): 39-48, March 2012
Economics of Rainfed Sericulture-A Study in the District of Udaipur in Rajasthan, India
Authors: Shukla Ruchira
Published: July 2012

Sericulture is a labour intensive agro-based rural industry, which provides  periodical income throughout the year. In view of this, it is very much  imperative to know the sericulture economics in order to motivate new farmers  to take up sericulture and increase their income. Therefore, a study was  conducted with the help of personal interview of 70 rainfed sericulture farmers  in Udaipur district of Rajasthan, India. The study concluded that in garden  establishment, highest share of cost was associated with human labour (INR  14,400.00) followed by that for FYM (INR 2418.75). Similarly human labour  (51.93%) accounted for highest element of cost in leaf production activities too  owing to high labour wages and shortage of manpower. Labour (25.33%) was  second major cost component next to mulberry leaf (38.64%) in silk cocoon  production. The average yield of silk cocoon obtained was 1289.04 kg/ha per  year. The net return obtained was INR 52039.32 and benefit cost ratio was 1.49. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11176 Bangladesh J. Agril. Res. 37(1): 49-54, March 2012
Study on Agronomically and Economically Dominant Cropping Patterns in Some Selected Areas of Barisal District
Authors: Kabir Md Jahangir , Islam Md Monirul
Published: July 2012

The study area was Shanuhar village of Babugonj Upazila of Barisal district, which was selected purposively based on agronomic suitability of growing Rabi crops. Necessary data were collected through focus group discussion (FGD) with 30 farmers including small, medium, and large farm households, school teachers, village leaders all the remaining by using pre design check list and structure schedule during May 2007 considering Rabi season of 2006-2007. Usually, farmers of the village could not sow their crops within the optimum  time. They transplanted Aman rice in late due to inundation of land and planting of Rabi crops in late because of land unsuitability and long duration of T. Aman rice. Boro rice was adopted about 75% of the cropped area in Rabi season and but yield was low because of inadequate irrigation facilities. In contrast wheat  needs comparatively less irrigation than Boro rice. Moreover, mungbean, mustard, lentil and grass pea produce reasonability good yield in rainfed condition. About 20- 25 % land become suitable for seeding wheat by first week of December after harvesting NfV T. Aman which indicated good prospect of   growing wheat in the study village. Wheat is a more profitable Rabi crop than   other crops like grass pea, mustard, lentil. Farmers earned the highest per  hectare gross return (Tk.98646) and gross margin (Tk.22870) from the Wheat  Aus rice -T. Aman rice pattern whereas Boro rice - Fallow - T. Aman pattern produced the lowest gross return (Tk.65918) and gross margin (Tk.10134). Higher benefit was achieved from the pattern Wheat Aus rice -T. Aman rice because of less production cost and high price of wheat grain, though three   cereals crops could exhaust soil nutrient so that Mungbean-Aus rice  T. Aman pattern may be alternate option to sustain soil health as well as productivity of   the selected area. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11177 Bangladesh J. Agril. Res. 37(1): 55-65, March 2012
Preservation of Jackfruit (Artocarpus heterophyllus) by Osmotic Dehydration
Authors: Rahman Md Mizanur , Miaruddin Md , Chowdhury MG Ferdous , Khan Md Hafizul Haque , Rahman Md Muzahid-E-
Published: July 2012

Preservation of jackfruit (Artocarpus heterophyllus) by osmotic dehydration    method has been standardized. Four treatments of sugar concentration viz. 35°:, 40°:, 45°:, and 50°: Brix were used for osmotic dehydration. After osmosis of the jackfruit slices in the sugar solutions these were laid on the cabinet drier for dehydration. After osmotic dehydration, the products were packed in high density polyethylene bags and stored in ambient temperature for a period of 8 months. The physico-chemical properties and the microbiological changes of the products were evaluated and a taste panel evaluated the organoleptic quality of  the products during the storage period. Minimum microbial count was recorded for osmosis in 50°: Brix sugar solution followed by 45°: Brix sugar solution. The retention of vitamin A (ß- carotene), vitamin C, total acid and total sugar was also better for osmosis in 45°: Brix sugar solution followed by 50°: Brix sugar solution. The product of 45°: Brix solution when stored 8 months at room temperature secured highest score in organoleptic evaluation and was ranked "like moderately" followed by the product of 50°: Brix solution. Considering the overall acceptance of sensory evaluations, retention of nutritional quality and quantity of sugar needed, the osmotic dehydrated jackfruit prepared by 45°: Brix sugar solution could be selected for commercial processing.DOI: http://dx.doi.org/10.3329/bjar.v37i1.11178Bangladesh J. Agril. Res. 37(1): 67-75, March 2012
Profitability of Flower Production and Marketing System of Bangladesh
Authors: Mou Nusrat Hasan
Published: July 2012

This study examines the production and profitability of some selected flowers in comparison with their competing crops. The study also attempts to identify the value chains and channels of flower marketing in Bangladesh. Stratified random sampling method was used to collect Primary data collected from the 32 farmers of Guptergaon under Phulpur Upazila in Mymensingh district and from the 21 flower traders, retailers and wholesalers of different flower trading zones in Dhaka city. The study reveals that gross margins of flower and vegetables per hectare were Tk.1,359,824.20 and Tk.46,362.14, respectively. The average marketing margin of three intermediaries i.e., BRAC, wholesaler-cum-retailer and retailer in Dhaka city, were Tk. 187.56, Tk. 638.39 and Tk.689.72 per 100 flowers, respectively. Lack of mother stock and their high price, price of fertilizer and insecticides, lack of scientific knowledge & training, attack by pest & disease, lack of extension work came out as major financial and technical problems of the flower farmers while inadequate & underdeveloped transportation & communication system, low market price, lack of market information, unstructured market are among major market related problems. On the other hand marketing intermediaries specified price instability, lack of adequate market information, lacking storage facilities, unsold flower, inadequate shop-space, demand fluctuation, strikes as their problems and constraints. Pertinent recommendations for facilitating flower production and developing an improved marketing system in Bangladesh include - a concentrated effort by the government and non-govt. agencies to provide  appropriate trainings to farmers and traders, to provide appropriate production assistance and storage facility & to build countrywide permanent trading infrastructure, deployment of an Market Information System (MIS) and deployment of Entrepreneur-friendly SME and credit policies and packages for ensuring a balanced growth of the floriculture industry. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11179 Bangladesh J. Agril. Res. 37(1): 77-95, March 2012
Economic Performance of Ginger (Zingiber officinale Rose.) Cultivation in Some Selected Locations of Bangladesh
Authors: Islam QM Shafiqul , Matin MA , Hossain S
Published: July 2012

The study was conducted in two ginger growing districts, namely Nilphamari  and Khagrachari of Bangladesh during the period of 2009-10 to estimate the technical efficiency of ginger growers. The study revealed that ginger production was profitable and the average benefit cost ratio (BCR) was found 2.17. The estimated results showed that the average level of technical efficiency among the sample farmers was 85. This implies that given the existing technology and level of inputs, the output could be increased by 15 percent. In inefficiency model, the coefficient of farmers education and experience in ginger cultivation was negative and significant. Sixty eight percent farmers produced outputs to the maximum frontier output level (81-95%). Farmers in the study area also mentioned some problems like incidence of root rot disease, high price of seed, insect infestation etc to its production. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11182 Bangladesh J. Agril. Res. 37(1): 109-120, March 2012
Genetic Divergence in Chickpea (Cicer arietinum L.)
Authors: Syed MA , Islam MR , Hossain MS , Alam MM , Amin MN
Published: July 2012

Genetic diversity of 27 chickpea genotypes was studied through Mahalanobis D2 and Principal Component analysis. The genotypes under study fall into five clusters. The cluster II contained the highest number of genotypes (11) and Cluster I contained the lowest. Cluster I produced the highest mean value for number of pods per plant. The inter cluster distances were much higher than the intra cluster distances. Cluster V exhibited the highest intra cluster distance while the lowest distance was observed in cluster I. The highest inter cluster distance was observed between cluster I and II while the lowest was between cluster III and V. Considering all the characters, it was suggested that the genotypes BD6549, BD6603, and BD6548 could used as parents for future breeding programs to develop high yielding varieties of chickpea. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11184 Bangladesh J. Agril. Res. 37(1): 129-136, March 2012
Response of Mustard (Brassica) Varieties to Boron Application
Authors: Hossain MA , Jahiruddin M , Khatun F
Published: July 2012

An experiment was conducted at the Regional Agricultural Research Station (RARS), Jessore (AEZ11, High Ganges River Floodplain) during 2003-2006 to evaluate the response of different varieties of mustard to boron application. Boron application was made at 0 and 1 kg/ha. The mustard varieties responded to B application. The response of the three Brassica species followed the order: B. napus > B. campestris > B. juncea. The varieties chosen from B. campestris were BARI Sarisha 6, BARI Sarisha 9, and BARI Sarisha 12. The B. napus varieties were BARI Sarisha 7, BARI Sarisha 8, and BARI Sarisha 13. Varieties BARI Sarisha 10 and BARI Sarisha 11 were from the B. juncea group. The seed yield was positively and significantly correlated with the yield contributing characters viz. pods/plant, seeds/pod, and 1000-seed weight, but not with plant height and pod length. This result showed that boron had positive influence on reproductive development, not on vegetative. The result suggests that BARI Sarisha 10 and BARI Sarisha 11 were the most B in-responsive (B efficient) varieties. So the farmers can grow these varieties in the moderately B deficient soils with a minimum dose (0.5 kg/ha) of B application. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11187 Bangladesh J. Agril. Res. 37(1): 137-148, March 2012
Effect of Different Hedgerow Species and Nitrogen Level on the Soil Properties and Yield of Okra (Abelmoschus esculentus L. Moench)
Authors: Firoz ZA , Nasiruddin KM , Mondal MF
Published: July 2012

Khagrachari from June 2002 to November 2004 to find out the effect of hedgerow species (Ipil-ipil, Indigofera, Pigeon pea , Pineapple with control) and different nitrogen levels (50, 75, and 100% recommended dose of N) on the soil properties and yield of okra in hill slope condition during the rainy season. Different soil properties were affected by hedgerow species and N level with okra crop. In maximum cases, Indigofera with 100% N showed better performance. The highest pH value 6.0, total nitrogen content 0.84, available phosphorus 4.4, exchangeable calcium 1.27 meq/100g, exchangeable sulphur 12.8 meq/100g, and CEC 21.5 were recorded from Indigofera with 100% N. The most satisfactory okra yield 15.05 t/ha was in Indigofera+100% N that was statistically at par with Indigofera+75% N. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11190 Bangladesh J. Agril. Res. 37(1): 159-169, March 2012
Measuring Technical Efficiency of Onion (Allium cepa L.) Farms in Bangladesh
Authors: Baree MA
Published: July 2012

An attempt was made to determine the overall farm-specific technical efficiency or inefficiency of onion farms of Bangladesh. Farm-level data were used for the estimation of the parameters of Cobb-Douglas stochastic frontier production function. The model for technical inefficiency effects in the stochastic frontier included age, experience, education, and farm size. The elasticity of output with respect to land, labour, and capital cost was estimated to be positive values of 0.3026, 0.0718, and 0.0442, respectively, and also significant. With respect to seed and irrigation, it was found to be insignificant with negative values of 0.0045 and 0.0007. It indicates that per hectare yield of onion decreases if the amount of seed and irrigation hour increase. The coefficients of age, experience, and farm size were significant with expected negative signs, which means that the inefficiency effects in onion production decreases with increase in age, experience, and farm size. The technical efficiency of onion farms varied from 58% to 99% with mean value of 83%. It denotes that there is a scope to increase output per hectare of onion farm by 17% through the efficient use of production  technology without incurring any additional costs. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11191 Bangladesh J. Agril. Res. 37(1): 171-178, March 2012
Response of Rice (Oryza sativa L) to Split Application of Potassium in Old Brahmaputra Flood Plain Soil
Authors: Uddin MS , Mian MJ Abedin , Saleque MA
Published: July 2012

Not available DOI: http://dx.doi.org/10.3329/bjar.v37i1.11192 Bangladesh J. Agril. Res. 37(1): 179-184, March 2012
Power Spectral Analysis of Heart Rate Variability in Female Rheumatoid Arthritis Patients
Authors: Jahan Kawser , Begum Noorzahan , Ferdousi Sultana
Published: July 2012

Background: Association of increased cardiovascular morbidity and higher sympathetic activity in  patients with Rheumatoid arthritis (RA) has been recognized. Heart rate variability (HRV) is a useful  measure to assess sympatho-vagal balance.Objective: To assess autonomic nerve function status in  patients with Rheumatoid Arthritis (RA) by HRV analysis.Methods: This cross sectional study was  conducted in the Department of Physiology, Bangabandhu Sheikh Mujib Medical University  (BSMMU), Shahbag, Dhaka from January to December 2010. Sixty female RA patients aged 18-50  years were included in the study group. They were enrolled from the Out Patient Department of  Rheumatology Wing of the Department of Medicine, BSMMU, Dhaka. For comparison age matched  thirty apparently healthy females were also studied as control. The HRV parameters were recorded by  a Polyrite machine. For statistical analysis independent sample t test was used.Results: Mean resting  pulse rate, diastolic blood pressure and mean systolic blood pressure were higher in rheumatoid  arthritis patients in comparison to those of healthy control. Mean values of LF power, LF norm and LF/  HF were significantly higher (p<0.001) & TP and HF power, HF norm were significantly lower (p<0.001)  in RA patients in comparison to those of healthy control.Conclusion: This study may conclude that  sympathetic activity was higher with lower parasympathetic activity along with shifting of  sympathovagal balance towards sympathetic predominance in patients with rheumatoid arthritis. DOI: http://dx.doi.org/10.3329/jbsp.v7i1.11153 J Bangladesh Soc Physiol. 2012, June; 7(1): 8-12
Association Between ABO Blood Groups And Myocardial Infarction In Jodhpur City of India
Authors: Garg Priyanka , Kumar Jayant , Choudhary Raghuveer , Chawla VK
Published: July 2012

Background: Many reports have appeared in recent years showing an association between blood  groups and Myocardial Infarction. Clinical studies have shown a significant association between MI  and blood group B.Objective: To investigate correlation of ABO blood groups with risk of MI.Methods: The present cross sectional study analyzed ABO blood group among total 400 subjects of  any age from the local population of Jodhpur city from July to December 2011.Among them 200  subjects were normal health (135 male and 65 female) students of Dr. S.N. Medical College, Jodhpur  and another 200 (135 male, 65 female) were MI patients admitted in the CCU of Mathura Das  Memorial (MDM) Hospital, Jodhpur. ABO blood group of all subjects were determined by slide  agglutination method. Risk of MI was expressed by risk ratio. Data were analyzed by one sample chi  square test.Results: The results obtained in this study showed that the prevalence of MI in blood  group B is significantly higher than in all other ABO blood groups.Conclusion: The results may  conclude that there is a significant association between MI and blood group B. So this study reveals  MI risk is associated with the blood group B. DOI: http://dx.doi.org/10.3329/jbsp.v7i1.11154 J Bangladesh Soc Physiol. 2012, June; 7(1): 13-17
FVC, FEV1 And FEV1/FVC% In Type-1 Diabetic Male And Their Relationships With HbA1c
Authors: Arif Khan Mohammad , Jahan Nasim , Sultana Nayma , Akter Rezina
Published: July 2012

Background: Diabetes mellitus is a chronic and debilitating disease. Its complications give rise to micro and macrovascular diseases which affect eyes, kidneys, heart, blood vessels, nerves and also lungs. There may be a relationship between type-1 diabetes and reduced lung function.Objectives: To observe FVC, FEV1, FEV1/FVC % and their relationship with HbA1C in type-1 diabetic male in   Bangladesh.Methods: This cross-sectional study was carried out in the Department of Physiology, Sir Salimullah Medical College, Dhaka from January to December 2009. A total number of 60 male   subjects, from 18-30 years of age was taken and was divided into control and study groups. Among them study group was consisted of 30 type-1 diabetic male patients. Control group was consisted of 30 apparently healthy age, sex, BMI and socioeconomic status matched non-diabetic subjects. All the subjects belonged to lower socio-economic status. For assessment of lung function, FVC, FEV1, FEV1/FVC % of all the subjects were measured. All of theses tests were done by spirometric method by using a digital Spirometer. Again, to observe glycemic control of blood, glycosylated hemoglobin (HbA1c) levels of diabetic patients were also measured by usual laboratory technique. Data were analyzed by Independent-Samples t test and Pearsons correlation coefficient test as applicable.Results: FVC (p <0.001), FEV1 (p < 0.001), and FEV1/FVC% (p < 0.05) were significantly lower in type-1 diabetic patients in comparison to those of apparently healthy non-diabetic male. Again FVC and FEV1 had significant (p < 0.001) negative correlation but FEV1/FVC% had non-significant positive correlation with HbA1c.Conclusion: Impairment of some lung functions may be found in type-1 diabetic male which may be due to poor glycemic control. DOI: http://dx.doi.org/10.3329/jbsp.v7i1.11156 J Bangladesh Soc Physiol. 2012, June; 7(1): 23-28
Some Aspects of Liver Function Status in G6PD Deficient Neonates and Its Relationship with G6PD
Authors: Akhter Nilufa , Begum Noorzahan , Ferdousi Sultana
Published: July 2012

Background: Neonatal jaundice is a common cause of newborn hospital admission. G6PD enzyme defects is one of the factor to develop neonatal hyperbilirubinemia, which may be related to abnormal liver function in this group of neonates.Objective: To observe some aspects of liver function status by measuring serum bilirubin and alanine amino transferase levels in G6PD deficient neonates and also their relationship with erythrocyte G6PD levels.Methods: The study was conducted on 30 male, term neonates with G6PD deficiency in the Department of Physiology, Bangabandhu Sheikh Mujib Medical University (BSMMU) between 1st July 2007 to 30th June 2008. For comparison age and sex matched 30 apparently healthy neonates without deficiency (control group) were also included in the study. Erythrocyte G6PD level was measured by Spectrophotometric method by using kit of Randox. Alanine amino transferase level was done by Schumann and Klauke method. For statistical analysis independent sample t test and Pearsons correlation coefficient test were performed as applicable by using SPSS for windows version-13Results: In this study, significantly (p<0.001)higher level of serum bilirubin & ALT were found in G6PD deficient group in comparison to those of non-deficient group. Further more, serum bilirubin & ALT levels were negatively (r=-.671, (r= -.534) correlated with erythrocyte G6PD level and it was statistically significant (p<0.01) in G6PD deficient group. Again, significant (p<0.05) positive (r=+.429) correlation of serum bilirubin level was observed in non deficient group. Whereas, non significant positive (r=+.041) correlations of ALT was found in non deficient group.Conclusion: From the study results it can be concluded that higher level of alanine amino transferaseand hyperbilirubinemia were present in G6PD deficient neonates & increase serum bilirubin and serum alanine amino transferase levels were associated with degree of G6PD enzyme deficiency. DOI: http://dx.doi.org/10.3329/jbsp.v7i1.11158 J Bangladesh Soc Physiol. 2012, June; 7(1): 36-40
Assessment of Autonomic Nerve Function In Hypothyroids By Time Domain Method of Heart Rate Variability
Authors: Ahmed Matia , Begum Noorzahan , Ferdousi Sultana
Published: July 2012

Background: Cardiovascular complications are common in hypothyroids .Time domain measures of HRV is useful to determine the cardiac autonomic regulation by assessing sympathovagal balance.Objective: To assess the cardiac autonomic nerve function activity by time domain measures of heart rate variability in patients with hypothyroidism.Methods: This cross sectional study was carried out in the Department of Physiology, Banghabandhu Sheikh Mujib Medical University between July 2008 to June 2009 on 60 female patients with hypothyroidism aged 30-50 years. 30 age matched apparently healthy euthyroid subjects were also studied as control. Hypothyroid patients were divided into 2 subgroups, one group includes patients on their 1st day of diagnosis, before starting of treatment and another group includes patients with medication for 12-18 months. The patients were selected from the Out Patients Department of Endocrinology Wing BSMMU. Serum TSH and FT4 levels of all subjects were measured by AxSYM system. For assessing HRV by time domain method, mean R-R   interval, mean heart rate, SDNN, RMSSD and variance were measured by a Polyrite. For statistical analysis, Independent Sample t test and One Way ANOVA were used.Results: The mean serum TSH was significantly higher and FT4 was significantly lower (p<0.001) in newly diagnosed hypothyroids than those of control and treated group. In untreated hypothyroid patients the mean values of heart rate, SDNN, RMSSD,variance were found significantly (p<0.001) lower in comparison to both control and treated patients. No significant difference in these hormonal levels and all these time domain measures were found between control and treated group.Conclusion: This study concludes that decrease parasympathetic nerve activity may be a consequence of hypothyroidism, if not treated properly. DOI: http://dx.doi.org/10.3329/jbsp.v7i1.11162 J Bangladesh Soc Physiol. 2012, June; 7(1): 48-52
Assessment of Autonomic Nerve Function In Patients With Irritable Bowel Syndrome
Authors: Nayem Mohammad , Begum Noorzahan , Ferdousi Sultana
Published: July 2012

Background: Autonomic nerve function impairment is related to development of Irritable Bowel Syndrome (IBS). Heart rate variability (HRV) is a useful tool to measure autonomic nerve function activity and also sympatho-vagal balance.Objective: To assess autonomic nerve function activity by heart rate variability analysis in patients with Irritable Bowel Syndrome.Methods: This cross sectional study was conducted in the Department of Physiology, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka from 1st July 2010 to 30th June 2011. Ninety patients aged 20-50 years of both sexes with Irritable bowel syndrome were included in the study group. They were enrolled from the OPD of Gastroenterology in BSMMU. For comparison age and sex matched 30 apparently healthy subjects were also studied as control. The power spectral HRV parameters were recorded by a digital Polyrite. For statistical analysis ANOVA, independent sample t-test were performed.Results: Mean resting pulse rate, mean HR, SBP, DBP, LF, LF norm and LF/HF were significantly higher(P<0.001) and total power, HF, HF norm were significantly lower(P<0.001) in IBS group compared to those of control.Conclusion: This study concludes markedly lower parasympathetic with concomitant higher sympathetic activity and shifting of sympathovagal balance towards sympathetic predominance in patients of IBS. DOI: http://dx.doi.org/10.3329/jbsp.v7i1.11163 J Bangladesh Soc Physiol. 2012, June; 7(1): 53-59
Endogeneité et autocorrélation spatiale : quelle utilité pour le modèle de Durbin ?
Authors: Fingleton Bernard , Le Gallo Julie
Published: July 2012

Cet article s’intéresse au problème de l’endogénéité dans un cadre spatial. Nous analysons le cas où l’endogénéité provient d’une variable omise spatialement autocorrélée. Nous montrons, de façon théorique et à l’aide de simulations de Monte-Carlo, qu’une façon de réduire le biais de variable omise consiste à estimer un modèle de DURBIN spatial, qui est un modèle dans lequel figurent à la fois une variable endogène spatiale décalée ainsi que les décalages spatiaux des variables exogènes. Les simulations soulignent également que le biais et la RMSE des estimateurs obtenus sur la base de ce modèle restent relativement faibles dans les cas de quasi non-stationnarité.
Mobilité quotidienne et vulnérabilité des ménages
Authors: Nicolas Jean-Pierre , Vanco Florian , Verry Damien
Published: July 2012

L’évolution des prix des carburants ces dernières années a relancé les débats sur la vulnérabilité des ménages en situation de dépendance automobile. Le travail présenté ici développe une méthodologie pour calculer le taux d’effort budgétaire des ménages pour leur mobilité quotidienne, à partir duquel un seuil de vulnérabilité est proposé. Cette méthode s’appuie en grande partie sur des bases de données disponibles dans la plupart des grandes agglomérations françaises, et notamment sur les enquêtes ménages déplacements. Une analyse des facteurs socioéconomiques et spatiaux explicatifs des variations de cette vulnérabilité suivant les ménages a pu alors être réalisée à partir des Enquêtes Ménages Déplacements de Bordeaux, Lille, Lyon et Marseille.
Mutations industrielles et dynamiques territoriales
Authors: Perrat Jacques
Published: July 2012

L’industrie reste un secteur-clé du développement économique de notre pays, à condition pour elle de relever les défis des nouvelles exigences environnementales. C’est le principal objectif des politiques publiques d’innovation. Les acteurs régionaux et locaux manquent souvent d’un cadre méthodologique adéquat pour appréhender l’impact de ces politiques sur les potentiels productifs de leurs territoires. Ce texte tente de répondre à ce besoin. La notion de complexe territorialisé de compétences est proposée pour évaluer le degré de performances technoproductives et institutionnelles d’un territoire, mais aussi sa capacité à maintenir ou à améliorer son rang dans la « hiérarchie des places » globale, face, notamment, à la stratégie des firmes multinationales.
Coûts de transaction et adoption des MAE territorialisées à enjeu eau
Authors: Rousset Sylvain , Louis Mathilde
Published: July 2012

Les mesures agroenvironnementales territorialisées (MAET) sont un nouvel instrument d’intervention publique pour atteindre l’objectif de bon état des milieux aquatiques prévu par la Directive cadre sur l’eau (DCE). A mi-parcours du Programme de Développement Rural Hexagonal 2007-2013, le taux de couverture des territoires à enjeu eau reste modeste. En référence au cadre de l’économie néo-institutionnelle, on formule la proposition selon laquelle les coûts de transaction jouent un rôle décisif dans les freins à l’adoption des mesures proposées par les opérateurs locaux. Une enquête auprès d’agriculteurs éligibles aux MAET en Poitou-Charentes confirme l’importance de l’accès à l’information et des préférences des producteurs en matière de flexibilité contractuelle.
Territorialisation de la politique rurale européenne en Emilie Romagne
Authors: Landel Pauline , Le Roy Anne
Published: July 2012

Cet article propose une analyse de la traduction régionale du Règlement de Développement Rural (RDR) 2007-2013 en Emilie Romagne en Italie. Construisant une démarche interdisciplinaire, nous analysons la mise en œuvre du RDR par la Région à partir des objectifs affichés dans la programmation, des leviers socioéconomiques sollicités, complétés par l’étude des modalités institutionnelles de mise en œuvre. Cette analyse débouche sur celle des instruments de territorialisation des mesures de développement rural (mesures de l’Axe 3 du RDR). Deux types de conclusions peuvent être tirés de cette étude. D’une part, le choix des instruments de territorialisation s’explique par le jeu de contraintes spécifiques dans lequel s’élabore l’action publique de développement rural, entre objectifs de renouvellement et rapports de pouvoirs en présence. D’autre part, d’un point de vue méthodologique, l’analyse de politique publique permet de révéler ces choix de territorialisation et d’alimenter une démarche d’évaluation compréhensive des effets des politiques publiques.
Research on Taylor Vortices in the Wedge-Shaped Air Gap of Evaporation Cooling Turbo Generator
Authors: Gao Jin Shui , Gu Guo Biao
Published: July 2012

Cooling technique is one of the most important parts to improve the development of turbo generator. Turbo generator with evaporative cooling stator and water cooling rotor possesses many excellent qualities for mid unit. In this system the stator bars and core are immerged in evaporative coolant, which could be cooled fully. The rotor bars are cooled by water inner cooling mode. In this paper, we describe the Taylor Vortices in the Wedge-shaped air gap of Evaporation cooling Turbo Generator and present the research on gas-flow and heat-transfer with different features in the turbo generator. The CFD method is used to analyze this system, which has different features, including gap size, rotating speed, Apex angle. And the heat-transfer calculation proves the axial direction gas-flow can do well to the rotator heat-emitting.
Omni-Vision System of Intelligent Car Based on DSP & FPGA
Authors: Zhou Yu Bin , Yang Yu Ning
Published: July 2012

In order to realize omni-vision system of intelligent car for auto wandering in real-time processing, an image processing system with 6 vision channels based on FPGA&DSP is designed. In the system, two ZBT SRAM chips are used as the input and output cache for high data transferring. A FPGA chip is responsible for the core logic controlling and video synchronous. Digital videos are sent so processing module by camlink bus. Data are exchanged by EMIF and McBSP between FPGA and DSPs. EDMA is used for data transferring between SRAM in FPGA and ZBT SRAM. The QDMA is used for 2D data transferring to 1D into DSP cache. Tasks are assigned to chips by μC/OS on master DSP. All this together, real-time data sampling and processing for multi-channel vision was realized.
Finite-Time Chaos Control and Synchronization of the New Chaotic System with Unknown Parameters
Authors: Li Ke E , Xu Yu Hua
Published: July 2012

In this paper, a new chaotic system is discussed. Some basic dynamical properties are studied , and we also deal with the finite-time chaos control and synchronization of the new chaotic system. Based on the finite-time stability theory, the control law are proposed to drive chaos to equilibria within finite time, and the control law and the parameter update law are proposed to realize finite-time synchronization of the new chaotic system under unknown parameters. The controller is simple and robust to noise. Numerical simulations are given to show the effectiveness of the proposed controllers.
Chaotic Analysis of the Velocity Signal in Impinging Stream Mixer
Authors: Zhang Jian Wei , Song Yan Fang
Published: July 2012

The velocity signal of the flow field in Impinging Stream Mixer (ISM) was measured with Laser Doppler Anemometer. A de-noising method for velocity signal in ISM based on wavelet threshold was used. It is obtained that the attractor of the system possess infinite self-similar nested structure by comparing the strange attractor before and after de-noising, which is based on phase space reconstruction theory. It is shown that K entropy and the largest Lypunov exponents have the similar tendency in spatial distribution through scientific computation, however, the stratification of K entropy is more obvious. The value of K entropy and the largest Lypunov exponents are both positive, proving that the system is chaotic. The results indicate that K entropy and Lyapunov exponents can be increased by improving the rotating speed, the disorder and unpredictability of chaos system will increase homogeneously, so as to promote the micro-mixing and improve work efficiency
Modeling and Experiment on Active Vibration Control of Hydraulic Excitation System
Authors: Zhang Hui Xian , Miao Ling Xia
Published: July 2012

For studying dynamic characteristics of fluid filled pipe under hydraulic excitation force generated actively by a new developed vibration exciter, at first a computer code based on the method of characteristics (MOC) was developed. Then the excitation force calculated by MOC was applied to the corresponding nodes of finite element of pipe, by using Newmark’s method, the dynamic response at every cross section of pipe was obtained. The numerical simulations show that a simple harmonic motion arises at every cross section of the pipe, and the lateral vibration amplitude of every node along the pipe increases as the rising excitation force. In addition, measured data were compared with numerical simulation, which were basically consistent with each other.
Finite Element Analysis of the Static/Dynamic Behavior of Wind Turbine Gearbox
Authors: Jing Wei , Sun Xu Jian , Sun Wei , Guo Ai Gui
Published: July 2012

Gearbox is a key part and is more easily over loaded and it has a high failure rate in MW-class wind turbine. It is necessary to analyze, predict and optimize its static/dynamical behavior. It presents the performance of one type wind turbine gearbox and the static analysis results of the housing, spline and gear pairs of the wind turbine gearbox are obtained using finite element method. The natural frequency and modal shape of the gearbox are analyzed. The modification data of the flank shape for each class tooth alignment and tooth profiles are obtained from the analysis. The related data on the strength and stiffness of all the parts in wind turbine gearbox are provided. It lays a foundation for the reliability assessment and optimization design of wind turbine gearbox.
Design of Auto Route Identified Vehicle Model Based on MC9S12XS128
Authors: Zheng Fu
Published: July 2012

A vehicle based on automatic route identification technology by using modulated infrared photoelectric sensors was introduced. Circuits for path detecting , motor drive, speed sensor and servo drive were designed. And the controlling strategy was introduced. At last, the assembled model car could run along the black line stably and fast.
Real-Time Attitude Simulation of Aerocraft Using dSPACE Emulator and Three-Axis Turn Table
Authors: Xie Dao Cheng , Wang Zhong Wei , Zeng Qing Hua
Published: July 2012

To solve the problem of ground simulation of aerocraft attitude in hardware-in-the-loop simulation (HILS), recurrence of aerocraft attitude is realized using dSPACE emulator and three-axis turn table. The hardware configuration and key technologies of control system are introduced. Construction and downloading of the dynamic model is done in dSPACE monitor computer, the model is calculated in dSPACE emulator. The communication between dSPACE and turn table is settled with serial-port of DS4201s card. The rotate motion of the inner middle and outer axis correspond to the three-channel motion of the aerocraft body. Simulation results indicate that dSPACE finish calculating complicated dynamic model, sending and receiving velocity data through serial-port is proper, bandwidth of turn table satisfies the need of simulation. Real rotating velocity of turn table is displayed using Controldesk tools, and fits well with the digital simulation data in pitching yawing and rolling directions, and the need for real-time attitude simulation in HILS is satisfied.
Experimental Study on Bending Capacity of Plain Wall System
Authors: Yee Hooi Min , Rohim Rohamezan , Chong Yong Ong
Published: July 2012

Plain wall system is highly suitable to be used with reinforced concrete as its building material. Concrete vertical walls may serve both architecturally partitions and structurally to carry gravity and lateral loading. Moment transfer of joint is an important aspect for proper structurally functioning of plain wall system. Hence, the aim of this study is to investigate experimentally the effect of reinforcement details in the wall on bending capacity for support stiffness in plain wall system in Malaysia. A total of six wall specimens were tested. Three of this specimens consisted single layer of rebar while another three specimen consisted of double layer of rebar. The size of the plain wall’s specimens is 1000mm in length, 1080mm in width, 1000mm in height and 80mm in thickness. The average concrete strength was 23.49MPa with Grade 30N/mm2 and the average yield strength of R5 bar was 817MPa. The bending capacity at failure for single layered of rebar in wall for specimen 1, 2 and 3 were found to be 3.59kNm, 3.81kNm and 3.15kNm, respectively. The bending capacity at failure for double layered of rebar in wall for specimen 1, 2 and 3 were 5.50kNm, 6.31kNm and 7.00kNm, respectively. Based on the results, specimens consisted of double layered of rebar in wall is found to provide higher bending capacity to the joint of plain wall system in the range from 56.25% to 98.86% compared with single layered of rebar in wall.
Gear Vibration Monitoring System Based on Virtual Instruments
Authors: Wu Chuan Hui , Guo Yu , Fan Ya Jun
Published: July 2012

Vibration analysis is widely used for gear faults diagnosis. A gear vibration monitoring system based on virtual instrument developing platform LabVIEW and vibration analysis technology is developed and introduced in this paper. It satisfies the requirements of machinery condition monitoring and supports function expansion. Online and offline monitoring of gear running states can be realized though this system in both time domain, frequency domain and joint time –frequency domain. Experiments showed that this gear vibration monitoring system can be widely employed in gearbox. System not only guarantees the accuracy of the test results but also provides a friendly user interface for users’ easy operation.
Design and Dynamic Walking Control of Humanoid Robot SCUT-I
Authors: Bi Sheng , Zhuang Zhong Jie , Min Hua Qing , Mo Hua Xi
Published: July 2012

The basic configuration and control method of the humanoid robot SCUT-I are presented. SCUT-I, developed by the Robot and Intelligent Software Laboratory in South China University of Technology, 58.2 centimeter tall and 3.9 Kg weight with 21 degree of freedom (DoF), was designed to be humanlike including two legs, two arms, a trunk and a head. The mechanical design, hardware description, sensor fusion and motion control schemes of SCUT-I are represented, and a kind of dynamical walking control schemes based on linear inverted pendulum model (LIPM) and attitude sensor feedback control is proposed.
Maximum Bending Moment and Maximum Additional Bending Moment for High Vertical Vessels under Wind Pressure
Authors: Tian Jian , Zhang Zhong Ning
Published: July 2012

On the basis of analyzing all forces on the self-supported vertical vessels, the superposition method in mechanics of materials and a MATLAB program are used to calculate the maximum wind bending moments of the high vertical vessels caused by both weight and linear distributed wind pressure. The results show that the effect of weight to wind bending moments of the heavy weight high columns can not be ignored. And a special formulation for calculating the maximum wind bending moment is deduced which can be directly used for strength and/or stability calculations.
Experimental Research on Trajectory Control of Walking Rehabilitation Training Robot
Authors: Wen Zhong , Qian Jin Wu , Shen Lin Yong , Zhang Ya Nan
Published: July 2012

In order to improve the effect of smooth motion, the impedance control is introduced into the control system of walking rehabilitation training robot. An impedance control strategy for active rehabilitation training model is proposed and analyzed, and an adaptive control algorithm is proposed on that basis. The experimental tests of three control methods including PD position servo control, impedance control and adaption control are implemented on the robot prototype. The experimental results show that the robot can continuously adjust its gait trajectory according to the human-robot interaction force to meet the expected gait characteristics under the latter two control strategies. The feasibility and validity of the two control strategies is proved, which will be used in active rehabilitation training.
Design of an Adaptive Terminal Dynamic Sliding Mode Controller for Anti-Ship Missiles
Authors: He Peng Cheng , Jia Lin Sheng , Wang Yu Lin , Zhang Wen Guang
Published: July 2012

Adaptive dynamic sliding mode control strategy for the overload control of anti-ship missiles using Lyapunov stability theory is proposed. By using a function augmented sliding hyperplane, it is guaranteed that the output tracking error converges to zero in finite time. In addition, an adaptive method is adopted to attenuate the uncertainties. The simulation shows validity of the proposed method.
Electric Vehicle Transmission Gear Ratio Optimization Based on Particle Swarm Optimization
Authors: Gu Qiang , Cheng Xiu Sheng
Published: July 2012

The driving range of electric vehicles is less than traditional vehicles due to the restriction of energy storage. It is raising the efficiency of each power component that is one of increasing electric vehicle driving range methods. A particle swarm optimization is used to optimize transmission gear ratio on established electric vehicle power component models. A simulation that simulates the energy consumption of vehicle after gear ratio optimization is given to compare with the actual energy consumption data of the vehicle before gear ratio optimization. The results show that the energy consumption and driving range of the latter are better than the former therefore this optimization is valid.
Electronic Structures of X Level due to Indium-Carbon Dimers in Silicon
Authors: Kawanishi Hiroyuki , Hayafuji Yoshinori
Published: July 2012

Electronic structures of silicon with carbon, indium, or indium-carbon dimers were calculated to investigate the interaction between indium and carbon in X center due to the indium-carbon dimers. Ab initio calculations were carried out mainly for basic Si71H60, C-Si70H60, In-Si70H60, and InC-Si69H60 clusters. The results showed that : (i) the X level was observed at EHOMO + 0.42 eV in the InC-Si69H60 which was a little bit shallower than EHOMO + 0.44 eV of the corresponding substitutional In in the In-Si70H60, (ii) dominant constituents of density of states of the X level were the partial densities of states of In and Si, and (iii) the X level had the antibonding nature between In and C.
Improvement of Corrosion Resistance of Rare Earth Element (REE)-Based Anodic Oxidation Coating on AZ91D Magnesium Alloy
Authors: Zain M.Z.M. , Illias S. , Salleh M. Mat , Ismail K. Azwan , Nooraizedfiza Z.
Published: July 2012

Anodization is a useful technique for forming protective films on magnesium alloys and improves its corrosion resistance. Based on the rare earth metal (REE) salt solution, the optimum parameter was selected by comparing the anti-corrosion property of anodic film. The structure, component and surface morphology of anodic film and cross-section were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS). The corrosion behavior was evaluated by immersion test. In this paper, a dense anodic film approximately 20 µm thick was prepared on a AZ91D magnesium alloy through anodic oxidation coating. The results show that the anodic films were mainly composed of Mg17Al12, Mg17La2, MgO and amorphous compounds. The best corrosion resistance was obtained with specimen anodized in solution containing both lanthanum nitrate and magnesium, whose corrosion resistance is approximately 3 times higher than that of as-received AZ91D magnesium alloy.
Enhancement of Mica Paper Insulation Strength with Surface Modification
Authors: Zhang Xiao Wei , Liu Shu Peng , Qian Yu Peng , Zhu Ying Bo
Published: July 2012

Mica paper is made as one kind of insulation material, but low strength limits its applications. Surface modification is proved to be an effective way to enhance its strength. In this paper modifier like ethylene diamine tetraacetic acid, cationic polyacrylamide, cationic starch, ethylene diamine tetraacetic acid plus cationic polyacrylamide and ethylene diamine tetraacetic acid plus cationic starch are introduced to improve strengths of mica paper. Finally ethylene diamine tetraacetic acid plus cationic starch is chosen as modifier of mica flakes. After modification mica paper can reach high tensile strength of 19.84N/cm, which is more than six times high than mica paper without any modification.
Index Loss Analysis of YBCO Coated-Conductor Coils by Means of Simulation
Authors: Li Xiu , Wang Yin Shun , Zhang Yang Rui
Published: July 2012

The high temperature superconducting (HTS) tape has low index value compared with the 1st generation superconductor based on the power-law model of V-I characteristics because of its intrinsic characteristics of weak-link and low pinning potential. So, there is potential drop resulting in joule heat called index loss when it operates below quench. To search a way for researching, the Weibull distributions of critical current and n-value in turns of a model double-pancake (DP), made of coated conductor, are numerically calculated based on anisotropic empirical models obtained by fitting the experimental data in the temperature of 77 K. And also the index loss of double-pancake (DP) is also calculated. Then, the double-pancake is tested at 77 K, furthermore the simulative results are quietly approaching the experimental results. Finally the optimal operation current for this DP is discovered.