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Treatment of Municipal Wastewater by Subsurface Flow Wetlands Modified to Rural Communities in Mexico 墨西哥改造的地下流湿地处理城市污水的研究
Pub Date : 2017-01-10 DOI: 10.9734/bjast/2017/31425
Luis Osornio-Berthet, I. Barceló-Quintal, M. García-Martínez, H. Solís-Correa, J. González-González
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引用次数: 0
Simulation of Steady State Heat Conduction Using an Hybrid Floating Walk and Markov Chain Technique 用浮动游动和马尔可夫链混合技术模拟稳态热传导
Pub Date : 2017-01-10 DOI: 10.9734/bjast/2017/30224
A. Dare
Markov chain technique had been developed for numerical simulation of steady state heat conduction. However the technique could only be used to handle domain with regular boundaries. An hybrid of floating walk and Markov chain techniques has therefore been developed. The technique was used to simulate temperature distribution in rectangular and two arbitrary shaped domains with mixed boundary conditions. The results obtained were compared with that obtained using finite difference and as well as using floating walk technique. Results were statistically analysed using ANOVA ( α =0.05) and the computer execution for all the three cases considered compared. The results from the developed hybrid technique were not significantly different from those from finite difference and floating walk techniques. The hybrid technique execution time was longer than that of finite difference technique but shorter than the floating walk technique. The study established the suitably of the hybrid floating walk markov chain technique for analysis of steady state heat conduction of arbitrary shaped domain.
马尔可夫链技术已被发展用于稳态热传导的数值模拟。然而,该技术只能用于处理具有规则边界的域。因此,浮动行走和马尔可夫链技术的混合已经被开发出来。该技术被用于模拟具有混合边界条件的矩形和两个任意形状区域的温度分布。将所获得的结果与使用有限差分和浮动行走技术获得的结果进行了比较。使用ANOVA(α=0.05)对结果进行统计分析,并对所有三种情况的计算机执行情况进行比较。所开发的混合技术的结果与有限差分和浮动行走技术的结果没有显著差异。混合技术的执行时间比有限差分技术长,但比浮动行走技术短。本研究建立了适用于任意形状区域稳态热传导分析的混合浮走马尔可夫链技术。
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引用次数: 1
Superluminal Hydrogen Atom in a Constant Magnetic Field in (3+1)-dimensional Spacetime (II) (3+1)维时空中恒定磁场中的超光速氢原子(II)
Pub Date : 2017-01-10 DOI: 10.9734/BJAST/2017/34195
E. Gazoya
In this paper, we have checked Stern-Gerlach experiment with the aim to study generic effect of an applied magnetic field onto transversely directed beam of hydrogen-like atoms. The ultrarelativistic phenomenon of spin of a Dirac particle (especially, electron spin) producing a continuum of linear angular momentum with the known result of superluminal propagation, suggests the feasibility of similar dynamics for a charged hydrogen-like particle under applied magnetic field, in spacetime. Another mechanism, very important but popularly less comprehensible, which sustains this linear momentum is known to
在本文中,我们检查了Stern-Gerlach实验,目的是研究施加磁场对类氢原子横向束的一般影响。狄拉克粒子的自旋(特别是电子自旋)产生连续线性角动量的超相对论现象,以及已知的超光速传播结果,表明在施加磁场的情况下,带电类氢粒子在时空中进行类似动力学的可行性。另一种维持这种线性动量的机制,非常重要,但普遍不太容易理解,已知
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引用次数: 0
A Geological and Physico - Mechanical Characterization of Marble of the Bidzar Quarry North-Cameroon 喀麦隆北部比扎尔采石场大理石的地质和物理力学特征
Pub Date : 2017-01-10 DOI: 10.9734/bjast/2017/30421
A. Wouatong, O. Kenmoe, F. Ngapgue, V. Katte, V. Kamgang
This study of the geological and physico-mechanical characteristics of the Bidzar quarry white marble exploited for cement manufacture has given rise to an exploitation model. This model has enabled the reduction in the size of the blast products through site reconnaissance and laboratory testing. The outcrops of white marble, dolomitic marble, quartzite and shales which were revealed Original Research Article Wouatong et al.; BJAST, 19(5): 1-11, 2017; Article no.BJAST.30421 2 on the ground surface and were foliated and fractured. The foliation plans however, showed two main directions of orientation on white marble: [NNE SSW and NNW SSE]. Likewise, the two main directions of fractures [NNW SSE (N160°E) in N S and NNE SSW (N10°E)] and two secondary directions [W E and NNW SSE (N140°E)] were present on white marble which is richer in CaO (52.65 to 55.45%) than the dolomitic one (30.15 to 31.78%). It came out that the quartzite was richer in SiO2 (95.43 to 98.86%) than shale (45.67 to 79.12%). The physical and mechanical characteristics of the white marble were: absolute density (2.77g/cm) and bulk density (2.75 g/cm). The mechanical fragmentation strength on the 6/10 mm and 10/14 mm fractions was 32% and 31%. The wear resistance on the same fractions was 33% and 25% respectively.
通过对Bidzar采石场用于水泥生产的白色大理石的地质和物理力学特性的研究,提出了一种开采模式。该模型通过现场勘察和实验室测试缩小了爆破产品的尺寸。原始研究文章Wouatong等人揭示的白色大理石、白云质大理石、石英岩和页岩的露头。;BJAST,19(5):2017年1月11日;物品编号:BJAST.30421 2,位于地面上,呈叶理状并断裂。然而,叶理平面图显示了白色大理石的两个主要方向:[NNE-SSW和NNW-SSE]。同样地断裂的两个主要方向[NNS-NNW-SSE(N160°E)和NNE-SSW(N10°E)]和两个次要方向/WE和NNW-SSE汉白玉的绝对密度为2.77g/cm,体积密度为2.75g/cm。6/10mm和10/14mm级分的机械破碎强度分别为32%和31%。相同组分的耐磨性分别为33%和25%。
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引用次数: 4
One Hundred Months of Construction Accidents in the Southeast of Mexico 墨西哥东南部100个月的建筑事故
Pub Date : 2017-01-10 DOI: 10.9734/BJAST/2017/33275
R. Carcaño
Construction work is considered to be one of the most dangerous activities, in which the workers are exposed to multiple risks. Due to the complex interdependence of the tasks and the fact that the productive plant changes location constantly, it is more difficult to manage injury prevention and safety in construction sites, with respect to other activities. The present study was conducted in Yucatan, Mexico, where low levels of prevention and compliance with obligatory norms have been reported. The aim was to analyze a sample of over one hundred construction accidents in building works in order to determine the causes and consequences of the lack of prevention. The risks which caused the accidents were analyzed with regard to their incidence and severity; the resulting injuries and the occupations of the workers affected were also analyzed. It was concluded that urgent measures are required in order to prevent four main risks (Concrete and masonry construction, Fall protection, Scaffolds, and Electrical); In addition, no actions were observed providing evidence that the phenomenon of lack of prevention in construction works is a priority for the authorities, companies or the trade unions.
建筑工作被认为是最危险的活动之一,工人面临着多重风险。由于任务的复杂相互依赖以及生产工厂不断变化的事实,相对于其他活动,建筑工地的伤害预防和安全管理更加困难。本研究是在墨西哥尤卡坦进行的,据报道,那里预防和遵守强制性规范的程度很低。研究的目的是分析一百多宗建筑工程意外的样本,以确定缺乏预防措施的原因和后果。从事故发生率和严重程度分析了造成事故的风险因素;并对造成的伤害和受影响工人的职业进行了分析。得出的结论是,需要采取紧急措施,以防止四个主要风险(混凝土和砌体结构,坠落防护,脚手架和电气);此外,没有观察到任何行动,证明建筑工程中缺乏预防的现象是当局、公司或工会的优先事项。
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引用次数: 2
Utility of River Training Structures and Present Status in Patuakhali District Bangladesh 孟加拉Patuakhali地区河道治理结构的应用及现状
Pub Date : 2017-01-10 DOI: 10.9734/bjast/2017/32073
S. Hossain, Wang Lixue, A. Adham, U. Navera, M. Ali
Aims: The focus of this study was to know usefulness of river training structures, controlling hydromorphological characteristics, socio-economic benefits of inhabitants and current situation of these structures in Patuakhali District. Study Design: Evaluations were measured on hydro-morphological features of rivers, protection safety based on utility of structures, environmental and social benefits by spot visit, face to face interview and focus group discussion methods. Original Research Article Mamun Hossain et al.; BJAST, 19(3): 1-12, 2017; Article no.BJAST.32073 2 Place and Duration of Study: Ten different river side location of Patuakhali District during JulySep in 2015. Methodology: Established five groups including eight persons/group in each location to carry out the questioner and evaluations were accomplished based on specific key point issue. Results: Three categories of river training structure were found at different location of the study area. Revetment with cement concrete (CC) block including 1.75 km bank protection measure from erosion due to high velocity tidal current at Lebukhali point (0.715 km), Patuakhali town protection point 2 (0.62 km) and Khepupara Bandar & town protection (0.42 km). Among them Lebukhali point was found more offensive comparing with others point. The level of risk of all structures was averages under low to medium except Lebukhali point. Conclusion: The training structures were found moderately stable due to maintenance and effectively acting as qualitative benefit for inhabitants in socio-economic aspect.
目的:本研究的重点是了解Patuakhali区河道整治结构的有用性、控制水力地貌特征、居民的社会经济效益以及这些结构的现状。研究设计:通过实地考察、面对面访谈和焦点小组讨论的方法,对河流的水文形态特征、基于结构效用的保护安全、环境和社会效益进行评估。原创研究文章Mamun Hossain等人。;BJAST,19(3):2017年1月12日;文章编号:BJAST.32073 2研究地点和持续时间:2015年7月至9月期间,Patuakhali区的十个不同河岸位置。方法:建立了五个小组,包括每个地点的八个人/小组来进行提问,并根据具体的关键问题进行评估。结果:研究区不同位置存在三类河道整治结构。用水泥混凝土(CC)块进行护岸,包括在Lebukhali点(0.715 km)、Patuakhali镇保护点2(0.62 km)和Khepupara Bandar镇保护点(0.42 km)采取1.75 km的护岸措施,防止因高速潮流而受到侵蚀。其中,勒布哈利点较其他点更具攻击性。除Lebukhali点外,所有结构的风险水平均为中低水平。结论:由于维护,培训结构适度稳定,在社会经济方面有效地为居民带来了质的效益。
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引用次数: 2
Geochemical Characteristic and Petrogenesis of Malumfashi Schist around Tandama Area, North-Western Nigeria 尼日利亚西北部Tandama地区Malumfashi片岩地球化学特征及岩石成因
Pub Date : 2017-01-10 DOI: 10.9734/BJAST/2017/30116
Idzi Alaku, O. Moshood, A. Agbor, A. Amos
between designed the study, the statistical ABSTRACT Malumfashi schists which occur in association with migmatite-gneisses and biotite granite, occupy about 60% of Tandama area, north-western Nigeria. geochemical features like the Na 2 O/Al 2 O 3 values, trace element ratios such as Th/U and REE patterns suggest that the protolith are predominantly derived from felsic igneous sources. Tectonically, SiO 2 /Al 2 O 3 versus K 2 O/Na 2 O plot revealed the protolith to have evolved within passive margin environment.
Malumfashi片岩与混辉片麻岩和黑云母花岗岩伴生,约占尼日利亚西北部Tandama地区的60%。Na 2o /Al 2o3、微量元素比值Th/U和REE等地球化学特征表明,原岩主要来源于长英质火成岩。构造上,sio2 / al2o3与k2o / na2o对比图显示原岩在被动边缘环境中演化。
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引用次数: 3
Effectiveness of Interactive Video Conferencing through Village Resource Centres of Karnataka, India: Farmers’ Feedback 印度卡纳塔克邦乡村资源中心交互式视频会议的有效性:农民的反馈
Pub Date : 2017-01-10 DOI: 10.9734/bjast/2017/30337
A. Shamna, K. Gowda, N. Gowda
Interactive video conferencing through satellite is an effective means of transferring the latest scored one was regarding the timing and duration of the programmes (69.5%). The prominent suggestions included regarding inculcation of experiences of progressive farmers and more success stories (89%). The study was ended with the conclusion that the technology transfer to farmers through this modern method of communication can empower the rural farmers in developing countries, enhance ecological and livelihood security and accelerate human development and quality of life.
通过卫星进行互动式视像会议是传送节目的有效手段,得分最高的是节目的时间和时长(69.5%)。突出的建议包括灌输进步农民的经验和更多的成功故事(89%)。研究的最后结论是,通过这种现代交流方式向农民转让技术可以赋予发展中国家农民权力,增强生态和生计安全,加速人类发展和生活质量。
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引用次数: 3
Soil Organic Carbon Concentrations and Stocks under Maize/Legume Cropping System in Alfisols of a Savanna Zone, Nigeria 尼日利亚热带稀树草原Alfisols地区玉米/豆科作物种植制度下土壤有机碳浓度与储量
Pub Date : 2017-01-10 DOI: 10.9734/BJAST/2017/32538
O. Chidowe, Musa Destiny, Abdulkadir Aisha
Carbon sequestration in soil aggregates and Carbon stock (SOC) under Maize-Legume Cropping system in a Northern Guinea Savanna Alfisol, Nigeria trial was conducted in 2014 and 2015 cropping seasons. The experiment was a randomized complete block design (RCBD), replicated three times and treatments used were: Sole Maize (M), Desmodium (D) and Soybeans (S); Maizesoybeans intercrop (MS), Maize-Desmodium intercrop (MD), Maize Strip cropped with Soybean (MS 2:4) and Maize Strip cropped with Desmodium (MD 2:4). Data obtained were evaluated for Organic carbon, carbon stock, Bulk density and mean weight diameter of aggregates in the soil. Results obtained show that Mono-crop (Sole) Maize treatment gave significantly higher BD than other treatments at 8WAP and 16WAP, suggesting that soils under sole maize were degraded for sustainable crop production. Organic carbon sequestered over 2014 to 2015 was least under MD and highest under MD2:4 treatments and mean carbon stock sequestered in the macro and micro aggregates was highest under MD 2:4 (28.35 t Cha -1 ) and least under MD (8.82 t Cha -1 ). Soil Original Research Article Chidowe et al.; BJAST, 21(1): 1-12, 2017; Article no.BJAST.32538 2 organic carbon (SOC) sequestered in macro aggregates under MS (1.38 gkg -1 ) were significantly higher than the other treatments. Maize/Desmodium 2:4 treatment was inferred to have best improved soil conditions (quality/health) for sustainable crop production, mitigate climate change and global warming by sequestering carbon better than the other treatments.
在2014年和2015年的种植季节,在尼日利亚几内亚北部Savanna Alfisol进行了玉米-豆类种植系统下土壤团聚体和碳储量(SOC)的固碳试验。实验采用随机完全区组设计(RCBD),重复三次,使用的处理方法为:Sole玉米(M)、Desmodium(D)和大豆(S);小麦-大豆间作(MS)、玉米-沙漠间作(MD)、大豆玉米条(MS2:4)和沙漠玉米条(MD2:4)。对获得的数据进行了评估,包括土壤中有机碳、碳储量、堆积密度和骨料的平均重量直径。结果表明,在8WAP和16WAP条件下,单季玉米处理的BD显著高于其他处理,表明单季玉米下的土壤已退化,可实现作物的可持续生产。2014年至2015年的有机碳螯合量在MD处理下最低,在MD2:4处理下最高,宏观和微观团聚体中螯合的平均碳储量在MD 2:4处理(28.35t Cha-1)下最高,在MD处理(8.82t Cha-1)之下最低。土壤原始研究文章Chidowe等人。;BJAST,21(1):2017年1月12日;文章编号BJAST.325382在MS(1.38 gkg-1)下大团聚体中固存的有机碳(SOC)显著高于其他处理。玉米/Desmodium 2:4处理被认为比其他处理更好地封存碳,从而改善了可持续作物生产的土壤条件(质量/健康),缓解了气候变化和全球变暖。
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引用次数: 5
Human Motion Analysis from Depth Video Sequences Using Multi-scale and Multi-directional Features 基于多尺度和多方向特征的深度视频序列人体运动分析
Pub Date : 2017-01-10 DOI: 10.9734/bjast/2017/31153
Tarafder, Hossain, Islam
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引用次数: 0
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British journal of applied science & technology
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