International Journal of Scientific Research in Knowledge最新文献_第10页

Application of Active Vibration Control for Earthquake Protection of Multi- Structural Buildings 主动振动控制在多结构建筑抗震中的应用

International Journal of Scientific Research in Knowledge Pub Date : 2013-11-01 DOI: 10.12983/IJSRK-2013-P502-513

M. Gudarzi, H. Zamanian

引用次数: 3

Tidal Influence on Epiphyton Population of Okpoka Creek, Upper Bonny Estuary, Nigeria 潮汐对尼日利亚邦尼河口上游Okpoka溪附生植物种群的影响

International Journal of Scientific Research in Knowledge Pub Date : 2013-10-01 DOI: 10.12983/IJSRK-2013-P373-387

O. A. Davies, O. A. Ugwumba

{"title":"Tidal Influence on Epiphyton Population of Okpoka Creek, Upper Bonny Estuary, Nigeria","authors":"O. A. Davies, O. A. Ugwumba","doi":"10.12983/IJSRK-2013-P373-387","DOIUrl":"https://doi.org/10.12983/IJSRK-2013-P373-387","url":null,"abstract":"Okpoka Creek of the Upper Bonny Estuary in the Niger Delta is a sink under tidal effects. The study investigated the influence of low and high tides on the species composition, diversity, abundance and distribution of epiphyton. The epiphyton samples were collected monthly from May 2004–April 2006 at both tides from ten stations according to APHA methods. Epiphyton was identified microscopically. Species diversity was calculated using standard indices. Data analyses were done using analysis of variance, Duncan multiple range and descriptive statistics. Phosphate and ammonia exceeded FEPA and USEPA acceptable levels (0.10 mg/L and 0.10 mg/L respectively) for natural water bodies. Phosphate had significant tidal variations (P<0.05). A total of 129 species of epiphyton were identified. Diatoms (35.4%) dominated the epiphyton population. Diversity indices of epiphyton diatoms were 0.9±0.03 (Margalef) and 0.5±0.01 (Shannon). Pollution-indicator species recorded at either or both tides were Navicula placentula, N. recognita, N. pusilla, N. similis, N. gastrum, Nitzschia bilobata, N. apiculata, N. lanceolata, N. acuta, N. sigma, N. linearis, Synedra ulna, C. menephiniana, Cocconeis placentula (diatoms), Cladophora glomerata, Scenedesmus sp (green-algae), Euglena acus (euglenoid), Anabeana spiroides (blue-green algae) and Ceratium furca (dinoflagellate). The presence of dominant diatoms, indicator species and high levels ammonia and phosphate indicate organic pollution and stress at both tides. Tide contributes to the perturbed condition of this creek. The study therefore suggests frantic environmental surveillance on the Upper Bonny Estuary to reduce the inflow of pollutants from the Bonny Estuary into this Creek caused by tide.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"72 1","pages":"373-387"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90901720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Reliability Based Approach for Predicting Optimal Tool Replacement Time 基于可靠性的刀具最佳更换时间预测方法

International Journal of Scientific Research in Knowledge Pub Date : 2013-10-01 DOI: 10.12983/IJSRK-2013-P413-421

A. S. Bhaskar, Venkata Ramesh Mamilla

{"title":"A Reliability Based Approach for Predicting Optimal Tool Replacement Time","authors":"A. S. Bhaskar, Venkata Ramesh Mamilla","doi":"10.12983/IJSRK-2013-P413-421","DOIUrl":"https://doi.org/10.12983/IJSRK-2013-P413-421","url":null,"abstract":"Turning can be classified as both rough and finishing process. Any failure during this process will cause a huge loss in terms of raw materials cost. In machining operation, to avoid failures and related consequences, tools are often replaced well before the end of their useful life time. Only 50-80% of the expected tool life is typically used. This is especially the case of production systems where process robustness is critical. Unfortunately, such a strategy leads to increased tool costs. Even though the cost of the tools is often assumed to be only 2-4% of the manufacturing costs, there are studies suggesting that tool costs can be much higher. The main objective of this paper is to outline a procedure for estimating the optimal tool replacement time based on the tool performance calculated using reliability function. This paper includes the selection of a suitable tool life distribution, modeling of reliability functions of cutting tool based on the flank wear as the major failure criteria, Experimental study to validate the reliability function developed for cutting tool, Development of total time on test (TTT) transformation to give brief idea regarding the failure rate of cutting tool.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"26 1","pages":"413-421"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81623080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption of Toluene by Waste Tyre Rubber Granules: Effect of Operating Variables, Kinetic and Isotherm Studies 废轮胎橡胶颗粒对甲苯的吸附:操作变量的影响、动力学和等温线研究

International Journal of Scientific Research in Knowledge Pub Date : 2013-10-01 DOI: 10.12983/IJSRK-2013-P427-438

A. Amenaghawon, F. Aisien, Osamudiamen Agho

引用次数: 9

Removal of Methylene Blue Dye from Aqueous Solution Using Activated Carbon Prepared from Pandanus Tectorius Leaves 虎芋叶活性炭去除水溶液中亚甲基蓝染料的研究

International Journal of Scientific Research in Knowledge Pub Date : 2013-10-01 DOI: 10.12983/IJSRK-2013-P388-403

M. N. Ismail, H. A. Aziz, M. A. Ahmad, M. A. Kamaruddin

引用次数: 4

Design & Development of Rotavator blade: Interrogation of CAD Method 旋转风机叶片的设计与开发:CAD方法的探讨

International Journal of Scientific Research in Knowledge Pub Date : 2013-10-01 DOI: 10.12983/IJSRK-2013-P439-447

S. K. Mandal, B. Bhattacharyya, S. Mukherjee, P. Chattopadhyay

{"title":"Design & Development of Rotavator blade: Interrogation of CAD Method","authors":"S. K. Mandal, B. Bhattacharyya, S. Mukherjee, P. Chattopadhyay","doi":"10.12983/IJSRK-2013-P439-447","DOIUrl":"https://doi.org/10.12983/IJSRK-2013-P439-447","url":null,"abstract":"Agricultural land preparation cost has increased to a new high label due to increase in fossil fuel prices. This directly increases the cost of food. Demand of food also increases due to high population rise and smaller land sizes (< 2-4 ha) due to fragmentation of land. So farmers are more interested to reduce the land preparation cost and increase the yield. Due to these facts, preparation of seedbeds for deep tillage in conventional tillage system, particularly in Indian farming, the situation is worsening day by day. This system of tillage escalates land preparation costs because it requires a series of operations using passive tillage tools to realize an acceptable till quality. It also ties down capital in the form of additional machinery and tillage tools; thus increasing significantly the cost of land preparation. Rotary tiller or rotavator is a tillage machine most suitable for seedbed preparation. In a Rotary tiller, Blades are the main critical parts which are engaged with soil to prepare the land. These blades interact with soil in a different way than normal plows which are subjected to impact and high friction that creates unbalancing and non uniform forces which result in blade wear. This actually decreases the service life of a blade. Therefore, it is necessary to design and develop a suitable blade so that self life is enhanced. This paper presents design and development of rotavator blade through the interrogation of computer aided design (CAD) method.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"38 1","pages":"439-447"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77180957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Antibiotic Resistance Profiles of Bacteria Associated with Fresh and Frozen Shrimp (Palaemonetes sp.) and Their Public Health Significance 鲜虾和冷冻虾相关细菌的抗生素耐药特征及其公共卫生意义

International Journal of Scientific Research in Knowledge Pub Date : 2013-10-01 DOI: 10.12983/IJSRK-2013-P448-456

L. Solomon, C. Ogugbue, G. Okpokwasili

{"title":"Antibiotic Resistance Profiles of Bacteria Associated with Fresh and Frozen Shrimp (Palaemonetes sp.) and Their Public Health Significance","authors":"L. Solomon, C. Ogugbue, G. Okpokwasili","doi":"10.12983/IJSRK-2013-P448-456","DOIUrl":"https://doi.org/10.12983/IJSRK-2013-P448-456","url":null,"abstract":"Bacteria associated with fresh and frozen shrimp were investigated to characterize the major bacterial pathogens of public health significance and to determine their antibiotic resistance profiles. Twenty (20) pieces of shrimp were analyzed using ICMSF recommended procedures. Fresh samples had an average total culturable heterotrophic bacterial (TCHB) count of 2.60 x 10 7 cfu/g and total coliform bacterial (TCB) count of 2.99 x 10 5 cfu/g while frozen samples had average count of 9.11x10 6 cfu/g for TCHB and1.66 x 10 6 cfu/g for TCB.The density of THCB and TCB in the fresh samples was significantly higher than that obtained for the frozen samples (p<0.05). A total of 290 bacteria were isolated, comprising 168 isolates from fresh samples and 122 isolates from frozen samples. The percentage of single isolate from fresh samples were: Proteus (6.5%), Escherichia (11.9%), Salmonella (8.3%), Staphylococcus (10.7%), Shigella (7.1%), Citrobacter (9.5%), Serratia (8.3%), Enterobacter (10.1%), Klebsiella (10.7%), Aeromonas (8.9%) and Vibrio (7.7%) while frozen samples had Pseudomonas (16.4%), Bacillus(4.9%), Streptococcus(15.6%), Alcaligenes (14.8%), Micrococcus (9.8%), Proteus (3.3%), Aeromonas (5.7%), Lactobacillus (11.5%), Moraxella (4.1%), Achromobacter (6.6%), and Flavobacterium (7.4%).Consumption of bacterial contaminated shrimps have been reported to be responsible for gastroenteritis, diarrhea, bacillary dysentery and typhoid fever in humans.Antibiogram of selected isolates indicated their multiple antibiotic resistances to all antibiotics. The highest resistance (100%) was recorded against streptomycin, cotrimoxazole, tetracycline, erythromycin, chloramphenicol, augmenting, gentamycin and amoxycilin. Ofloxacin (12.5%) recorded the least resistant followed by Ciprofloxacin (25%). Environmental sanitation and proper handling will reduce bacterial pathogens in shrimp and enhance its nutritional value.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"15 1","pages":"448-456"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82550646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Effect of Nano Materials on Asphalt Cement Properties 纳米材料对沥青水泥性能的影响

International Journal of Scientific Research in Knowledge Pub Date : 2013-10-01 DOI: 10.12983/IJSRK-2013-P422-426

S. Sarsam

引用次数: 17

Addition of Yattria Partially Stabilized Zirconia for Reinforcement of Dental Porcelain 添加部分稳定氧化锆增强牙瓷

International Journal of Scientific Research in Knowledge Pub Date : 2013-10-01 DOI: 10.12983/IJSRK-2013-P404-412

I. M. Hamouda, Mohammed M. Beyari, Dental Biomaterials

{"title":"Addition of Yattria Partially Stabilized Zirconia for Reinforcement of Dental Porcelain","authors":"I. M. Hamouda, Mohammed M. Beyari, Dental Biomaterials","doi":"10.12983/IJSRK-2013-P404-412","DOIUrl":"https://doi.org/10.12983/IJSRK-2013-P404-412","url":null,"abstract":"Effect of addition of Yttria partially stabilized Zirconia powder to dental porcelain was studied. The zirconium powder was incorporated in 3, 5 and 7-percent by weight to dental porcelain powder. The measured properties were flexural strength, modulus of elasticity, fracture toughness and hardness. Samples were prepared according to the manufacturers instructions. Zirconia powder was thoroughly mixed with the porcelain powder in the correct weight percent before use. Flexural strength, modulus of elasticity, and fracture toughness were measured using three-point bending test. The hardness was measured using a conventional microhardness tester. All data were collected and analyzed with one-way analysis of variance (ANOVA) and LSD test (p=0.05). The results indicated that the addition of 3 % and 5 % Yttria partially stabilized Zirconia to the conventional dental porcelain powder resulted in increased flexural strength and fracture toughness of the porcelain. On the contrary, 3 % and 5 % zirconia decreased both the modulus of elasticity and hardness. In addition, 7 % zirconium powder decreased the studied properties. X-ray examination showed that zirconia addition increased the radiopacity of the material. It was concluded that zirconia-modified dental porcelain was stronger and tougher than the conventional unmodified ceramic.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"7 1","pages":"404-412"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75884300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Studies of Physicochemical Properties of Rhizosphere of Elaeis guinensis in Ayingba 阿应坝金菖蒲根际理化性质研究

International Journal of Scientific Research in Knowledge Pub Date : 2013-09-01 DOI: 10.12983/IJSRK-2013-P358-362

Stephen Emmauel, Oguche A. Oguche

引用次数: 1