Pacific Science Review A: Natural Science and Engineering最新文献_第3页

Process of designing efficient, emission free HVAC systems with its components for 1000 seats auditorium 为1000座礼堂设计高效、无排放的暖通空调系统及其组件的过程

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.09.010

Rutvik Lathia, Jaymin Mistry

{"title":"Process of designing efficient, emission free HVAC systems with its components for 1000 seats auditorium","authors":"Rutvik Lathia, Jaymin Mistry","doi":"10.1016/j.psra.2016.09.010","DOIUrl":"10.1016/j.psra.2016.09.010","url":null,"abstract":"<div><p>Heating, Ventilating and Air Conditioning Systems (HVAC) are applied for primarily cooling purpose as well as to maintain quality of air. Since, most of the HVAC company has lack of data for the designing purpose – leads to uncomforting. Less standardization in designing criteria of HVAC Systems (Except ASHRAE which provides data for refrigeration systems) leads to write this paper. There is no any sources available that can exactly says how to design an energy efficient HVAC Systems. This paper provides the mathematical aspects for designing the HVAC Systems. This paper includes the process of designing HVAC with components by using mathematical framework – confirmed by software. This paper provides proper selection of capacity of systems and life cycle cost analysis too. For the simplicity of understanding, we have provided a demonstration with the example of 1000 seats auditorium situated at Vadodara, Gujarat. As the result of this designing, we got an emission free HVAC Systems with low GWP (Global Warming Potential) and ODP (Ozone Depletion Potential) – providing best comfort condition with reduction trunk duct arrangement and low life cycle cost. However production side of the Ducting Systems will become more expensive and complex due to numbers of joints and duct sizes but after applying it properly – better performance and less frictional losses lead the system to high Energy Efficiency Ratio (EER).</p></div>","PeriodicalId":100999,"journal":{"name":"Pacific Science Review A: Natural Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.psra.2016.09.010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74522887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Equipment to increase the functional activity of rice seeds by laser radiation 利用激光辐射提高水稻种子功能活性的设备

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.09.007

Coj San Zin , O. Chol Zin , Oleg Kamenev

引用次数: 1

Journey of enzymes in entomopathogenic fungi 昆虫病原真菌中酶的历程

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.10.001

Subhoshmita Mondal , Sibashish Baksi , Andras Koris , Gyula Vatai

引用次数: 88

Design and construction of an automatic syringe injection pump 自动注射器注射泵的设计与构造

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.09.015

Mohsen Jafarzadeh , Fardad Farokhi

{"title":"Design and construction of an automatic syringe injection pump","authors":"Mohsen Jafarzadeh , Fardad Farokhi","doi":"10.1016/j.psra.2016.09.015","DOIUrl":"10.1016/j.psra.2016.09.015","url":null,"abstract":"<div><p>Today, the world is witnessing more interest in robotics and their application in various fields, such as medicine. Enhancing accuracy, increasing speed of operation and reducing costs are the primary performance objectives in the improvements to design and manufacture of devices or robots. One of the best ways to achieve these aims is using devices or robots instead of human resources. The injection pump we designed and manufactured in this work is a type of robot that has applications in medicine and health centres. This device is used for patients who are unable to receive foods and drugs orally. By examining similar foreign devices in Ardebil health centres, studying their advantages and disadvantages, and researching health centre requirements for these devices, we designed and constructed such a device for the first time in this country. The most important items achieved in these investigations include time, accuracy, speed of drug injection and cost reduction. The shortest time we achieved using this device was approximately 6 s for 1 cc of drug or fluid. We also calculated the speed of injection for 1 cc of drug to be approximately 0.17 cc per second, which was an ideal value compared to that of similar foreign devices. In comparison to the cost of similar foreign devices, our device has a lower cost due to simplicity and high performance. To achieve these results, we designed a new device engine. In this design we used a three-step engine that has a different algorithm than similar devices. In this engine, every cc was injected in 2000 steps of the engine, and each step was 3 ms, achieving 6 s for each cc of injection.</p></div>","PeriodicalId":100999,"journal":{"name":"Pacific Science Review A: Natural Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.psra.2016.09.015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90523702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Biological activities of different neem leaf crude extracts used locally in Ayurvedic medicine 印度草药中不同印楝叶粗提取物的生物活性

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.09.013

Zainab Saif Saleh Al-Hashemi, Mohammad Amzad Hossain

{"title":"Biological activities of different neem leaf crude extracts used locally in Ayurvedic medicine","authors":"Zainab Saif Saleh Al-Hashemi, Mohammad Amzad Hossain","doi":"10.1016/j.psra.2016.09.013","DOIUrl":"10.1016/j.psra.2016.09.013","url":null,"abstract":"<div><p>Neem (<em>Azadirachta indica</em>) is widely used in the Ayurvedic medicine system for treating malaria and fever. The present study was undertaken to prepare crude extracts of neem leaves with different polarity organic solvents by using a maceration method and assessing phytochemical screening, the total phenol content and antioxidant activity by the spectroscopic method. The leaf samples collected from the Bahla, Ad Dakliyah region were used for extraction by a maceration method using different organic solvents with increasing polarities. Biochemical screening was determined by established methods. The total phenol content and free radical scavenging activity were assessed by conventional Folin–Ciocalteu reagent (FCR) and α, α-diphenyl-β-picrylhydrazyl (DPPH) methods. Biochemical screening of the crude extracts of neem leaves revealed positive results of flavonoids, saponins, steroids, alkaloids, amino acid and tannins. However, triterpenoid and anthraquinone were not detected in the crude extracts of neem leaves. The total phenol content of crude extracts from the leaves of the plant selected to be the gallic acid equivalent was found to be the highest in the ethyl acetate extract containing phenol compounds (3.58 g/100 g of dry powder) and the lowest in the water extract (0.42 g/100 g of dry powder). The highest antioxidant activity was found in the butanol extract and the lowest was in the hexane extract of the plant selected to be equivalent to DPPH. The crude extracts of neem showed significant antioxidant activity; thus, these extracts could be used as natural antioxidants for the preparation of medicines to treat different diseases.</p></div>","PeriodicalId":100999,"journal":{"name":"Pacific Science Review A: Natural Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.psra.2016.09.013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80444163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 67

The nonlinear nature of barotropic currents in oceans 海洋中正压流的非线性性质

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.09.002

Alexander V. Kazansky

引用次数: 0

Long-term load forecast modelling using a fuzzy logic approach 利用模糊逻辑方法建立长期负荷预测模型

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.09.011

Danladi Ali, Michael Yohanna, M.I. Puwu, B.M. Garkida

引用次数: 73

Proposed efficient algorithm to filter spam using machine learning techniques 提出了一种利用机器学习技术过滤垃圾邮件的高效算法

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.09.017

Ali Shafigh Aski , Navid Khalilzadeh Sourati

{"title":"Proposed efficient algorithm to filter spam using machine learning techniques","authors":"Ali Shafigh Aski , Navid Khalilzadeh Sourati","doi":"10.1016/j.psra.2016.09.017","DOIUrl":"10.1016/j.psra.2016.09.017","url":null,"abstract":"<div><p>Electronic spam is the most troublesome Internet phenomenon challenging large global companies, including AOL, Google, Yahoo and Microsoft. Spam causes various problems that may, in turn, cause economic losses. Spam causes traffic problems and bottlenecks that limit memory space, computing power and speed. Spam causes users to spend time removing it. Various methods have been developed to filter spam, including black list/white list, Bayesian classification algorithms, keyword matching, header information processing, investigation of spam-sending factors and investigation of received mails. This study describes three machine-learning algorithms to filter spam from valid emails with low error rates and high efficiency using a multilayer perceptron model. Several widely used techniques include C4.5 decision tree classifier, multilayer perceptron and Naïve Bayes classifier, all of which are used for training data whether in the form of spam or valid emails. Finally, the results are discussed, and outputs of considered techniques are examined in relation to the proposed model.</p></div>","PeriodicalId":100999,"journal":{"name":"Pacific Science Review A: Natural Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.psra.2016.09.017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74280446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 53

Chemical and biological evaluation of Andrographis echioides leaf extracts collected from the Vellore district in Tamil Nadu, India 印度泰米尔纳德邦Vellore地区穿心莲叶提取物的化学和生物学评价

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.09.016

D. Mathivanan, S.R. Suseem

{"title":"Chemical and biological evaluation of Andrographis echioides leaf extracts collected from the Vellore district in Tamil Nadu, India","authors":"D. Mathivanan, S.R. Suseem","doi":"10.1016/j.psra.2016.09.016","DOIUrl":"10.1016/j.psra.2016.09.016","url":null,"abstract":"<div><p>The chemical and biological activities of crude extracts of <em>Andrographis echioides</em> leaves using petroleum (pet) ether, ethyl acetate, methanol and aqueous solvents were assayed.</p><p>The total phenol, flavonoid, protein and carbohydrate contents of <em>A</em>. <em>echioides</em> crude extracts were evaluated. The antioxidant activities of the leaf extracts were determined by 1,1-diphenyl-2-picrylhydrazyl radical (DPPH), hydrogen peroxide, metal chelating, reducing power and total antioxidant activity assays. In addition, the crude extracts were screened for antibacterial activity (gram-positive and gram-negative bacteria) by disc diffusion method and the minimum inhibitory concentration was determined.</p><p>Of the crude extracts tested, the pet ether extract of <em>A</em>. <em>echioides</em> contained more total phenols (0.01955 ± 0.0012 mg/g), flavonoids (1.2889 ± 0.3606 mg/g) and proteins (1.6065 ± 0.160 mg/mL). The aqueous extract of <em>A</em>. <em>echioides</em> was enriched for carbohydrate (467.6 ± 0.003 mg/mL). The methanol extract of <em>A</em>. <em>echioides</em> exhibited potent antioxidant activity IC50 values (1.14 ± 0.06 to 1.15 ± 0.45 μg/mL), as well as antibacterial activity (16 ± 1.527 mm), than the aqueous extract of <em>A</em>. <em>echioides</em> (20 ± 1.527 mm).</p><p><em>A. echioides</em> has great potential as a source of anti-cancer compounds due to its high antioxidant content and antibacterial activity.</p></div>","PeriodicalId":100999,"journal":{"name":"Pacific Science Review A: Natural Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.psra.2016.09.016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84628008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Dynamics of a two prey and one predator system with time interruption and random fluctuations 具有时间中断和随机波动的两个猎物和一个捕食者系统动力学

Pacific Science Review A: Natural Science and Engineering Pub Date : 2016-07-01 DOI: 10.1016/j.psra.2016.10.002

K. Shiva Reddy , M.N. Srinivas , C.V. Pavan Kumar

引用次数: 3