Open Access Journal of Science and Technology最新文献

{"title":"Effect of Tungsten on Physical and Optical Properties of Niobate Tellurite Glasses","authors":"M. S. Shaharin, R. Arifin, S. K. Ghoshal","doi":"10.31580/OJST.V2I1.919","DOIUrl":"https://doi.org/10.31580/OJST.V2I1.919","url":null,"abstract":"In the present work, three optically transparent tungsten niobate tellurite glasses with compositions of (90-x)TeO2-10Nb2O5-xWO3 (x = 0, 6, 12 mol%) were synthesized by conventional melt quenching technique. For all these three glass samples, the structural and the compositional dependence of different physical parameters such as density, molar volume and ionic packing density have been analyzed. It been observed that the amorphous nature of the samples has been confirm by X-ray diffraction analysis. The physical properties of the glasses were evaluated and the change in density ( ), molar volume ( ) and ionic packing density ( ) in these glasses indicates the effect of WO3 different content registered on the glasses structure. The highest refractive indexes value 2.171 at 632.8 nm was measured for 78TeO2–10Nb2O5–12WO3 glass. It is found that the addition of WO3 concentration to TeO2-Nb2O5 glass system increase the value of density, molar volume as well as ionic packing density. The refractive index value of the glass increase with tendency for small optical energy band gap.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82662765","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}

{"title":"Analysis Signage Systems Based on Local Wisdom: Study Case Setu Babakan","authors":"Santo Tjhin","doi":"10.31580/OJST.V2I1.902","DOIUrl":"https://doi.org/10.31580/OJST.V2I1.902","url":null,"abstract":"Betawi’s culture such as dance, food, and language is increasingly eroded. It can be said that it is gradually become extinct and this is due to the influence of technology developments. The government has taken many steps to preserve the Betawi culture, one of which is the placement of Condet region in East Jakarta for the development and preservation of Betawi’s culture. Recently, the DKI Jakarta Government takes steps to preserve the pride and mascot of Jakarta city, which is the Betawi culture in Setu Babakan. \u0000The word setu or \"situ\" itself means lake, while babakan means wood fiber. In the area of Setu Babakan, the provincial government provides a variety of facilities such as educational facilities as a learning area for Betawi culture and other various entertainments related to Betawi culture. Setu babakan has transformed from a lake into a tourism area, so it becomes one of the alternative tourism spot for local residents and foreign tourists. \u0000The large area requires a signpost or commonly called signage, this is very important because signage is part of wayfinding, which has a role in providing direction inside the city. Indirect signage plays role in improving the flow system of visitors, so that there will be no accumulation in one particular location. At present, the condition of the signage area is already exist, but it has not been maximized in the role of its function as a signpost. In terms of aesthetics and design, the existing signage does not display the elements of Betawi culture which should be represented through signage.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73278242","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}

{"title":"Laser Controlled Cavitation Deformation in Red Blood Cells","authors":"Tahira Ahmed, Y. Jamil","doi":"10.31580/OJST.V2I1.935","DOIUrl":"https://doi.org/10.31580/OJST.V2I1.935","url":null,"abstract":"In this research work, we studied µTAS (µ total analysis system) method to measure the deformability of red blood cells .We took  the sample of RBCs(red blood cells) in a micro fluidic based chamber, then  allowed  low intensity laser of infra red region, mostly at wavelength 1064 nm, to fall on the sample. This generated a cavitation bubble in the fluid because of evaporation mechanism involved. We tightly hold the slides containing blood sample so that the displacement of RBCs (red blood cells) stay confined in the viewing area of the microscope. Firstly the deformation due to expansion of cavitation bubble was sighted and then came the restoring of shape of RBCs (red blood cells) which was possible due to a focused and pulsed laser. The RBCs restored their shape after some time and was viewed with the help of a video recorded by a high- speed camera. In this way the plastic character and elastic properties of RBCs (red blood cells) was measured.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78395497","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}

{"title":"Activities of Student Centralisation, Questionnaire, Modelling, and KBAT Among Science and Non-Science Students","authors":"Tajul Rosli Bin Shuib, M. Husin, Norliza Ghazali","doi":"10.31580/OJST.V2I1.904","DOIUrl":"https://doi.org/10.31580/OJST.V2I1.904","url":null,"abstract":"The purpose of this study was to identify whether or not there was a significant difference in the variables of student centralisation, teacher questioning, teacher modelling and high-level thinking skills of students based on class stream for low-performing school students in Kudat, Sabah, Malaysia. This quantitative study used a survey method involving 250 respondents from the stated population. This study referred to the Absorption Learning Model (Swartz, Fischer and Parks, 1998) as the basis model for the study. The data were analysed using the T-test with Statistical Packages for Social Science (SPSS) version 22. Based on the class stream in Kudat district, the findings showed that there was a significant difference in the involvement of student centralisation between Science and non-Science students; there was no significant difference in teachers' questioning between Science and non-Science students; there was no significant difference in teacher modelling between Science and non-Science students; there was a significant difference in thinking skills level between Science and non-Science students. It is hoped that this study can provide useful inputs for improving the practice of teaching infusion of teachers to students from every class stream in Kudat region in particular and throughout Malaysia in general.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83991862","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}

{"title":"The Effect of Use of Social Media on Prosocial Behavior","authors":"Kamalrul Asyraf Abdul Malik, Anuar Ahmad","doi":"10.31580/OJST.V2I1.909","DOIUrl":"https://doi.org/10.31580/OJST.V2I1.909","url":null,"abstract":"This study aims to identify the impact of social media use on user's prosocial behavior. In today's development of technology, there is no doubt that internet needs are increasingly dominant in everyday life, both in socialization, education, business and others. Social media has a huge impact on one's life. For society, especially among adolescents, social media has become a necessity that makes it a consumer no day without opening social media. Does the use of social media affect the prosocial behavior of a user? Prosocial behavior refers to behavior that can benefit other people around it. Prosocial behavior is often regarded as the foundation of human relationships and has a positive value. The research used was a survey. The questionnaire used has 3 parts. Part A is demographic, part B is a social media usage pattern. While part C is prosocial behavior. The results showed that alpha chroma values ​​were high at 0.915. The sample involved 350 active social media users. Statistical Package for Social Science (SPSS) version 21 for descriptive and inferential data analysis. Descriptive statistics of frequency and mean used for distribution analysis. While inferential statistics, the T-test analysis is used to examine the differences in social and prosocial behavior among the sexes. The findings show that the use of social media does not affect the prosocial behavior of social media user in Malaysia.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83548178","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}

{"title":"TiO2/FetiO3/WO3 Ternary Composite Semiconductor as Efficient Photocatalyst: Structural Designing, Characteraization and Investigation of Photocatalytic Efficiency","authors":"Parvathy, Saranya, and Sivakumar","doi":"10.11131/2017/101259","DOIUrl":"https://doi.org/10.11131/2017/101259","url":null,"abstract":"WO3, FeTiO3 and TiO2 photocatalyst prepared by simple sol-gel method followed by thermal treatment at 550°C, 550°C and 450°C for 3 hours respectively. TiO2/FeTiO3/ WO3 ternary composite has shown good activity for the degradation of reactive dyes in UVvisible light than that of binary composites such as TiO2/WO3, TiO2/FeTiO3. The prepared photocatalyst characterized by various techniques. 2 wt% TiO2/FeTiO3/WO3 ternary composite has demonstrated highest activity for the degradation of Reactive Blue 160 (RB 160). The composite photocatalyst also has good reusability; the 2 wt% TiO2/FeTiO3/WO3 photocatalyst completely degraded RB 160 in 120 minutes than that of parent photocatalysts. COD analysis of the degraded dye solution shows more than 70% of dye molecules in 100 mg l-1 reactive dye solution were mineralized in 3 hours. Hence, RB 160 photocatalyst will be an efficient and simplest method for the degradation of organic dyes and other organic pollutants in industrial effluent.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89636662","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}

{"title":"CLAY ROOFING TILE: A COOL ROOF?","authors":"Anumah, Lesado","doi":"10.31580/ojst.v1i1.151","DOIUrl":"https://doi.org/10.31580/ojst.v1i1.151","url":null,"abstract":"The aim of this study is to determine if the clay roofing tile in its natural albedo can be considered “cool” in the thermal performance through a comparison of its surface temperature to a cool coated clay tile using the exposure rack method. It begins with highlighting the expectation (from review) of the thermal performance of a cool colored tile and comparing the surface temperature (maximum, mean and minimum) of the tiles. Day and night time temperature behaviors were also compared using graphs on excel software. A python t- test of means was also carried out to determine if there was any significant difference in the performance of the materials. It was found that the performance of the clay tile in its natural albedo is a cool tile in its thermal performance. The implication of this is a cost saving strategy. However, further research is needed as a form of coating may be needed in order to enhance its life span. A non- color coat whose only function is to protect the surface of the tile. This does not in any way disregard the use of coated tiles as user preference may still tend towards non- natural clay colored tiles, its purpose is to encourage informed cheaper methods of achieving cool roof strategies","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91518270","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}

{"title":"A NEW VIEW OF FUZZY ORDERED SEMIGROUPS","authors":"H. Khan, Asghar Khan, F. Khan, Amir Khan, Muhammad Taj","doi":"10.31580/OJST.V1I1.150","DOIUrl":"https://doi.org/10.31580/OJST.V1I1.150","url":null,"abstract":"fuzzy coding theory, fuzzy finite state machines, and fuzzy languages. In this paper, we introduce the concept of an interval-valued -fuzzy filter of an ordered semigroup, where with. Since the concept of an interval-valued -fuzzy filter is an important and useful generalization of the ordinary interval-valued fuzzy filter, we discuss some fundamental aspects of an interval-valued -fuzzy filters. An interval-valued -fuzzy filter is a generalization of the existing concept of an interval-valued fuzzy filter. We discuss the concept of an interval-valued -fuzzy left (right)-filters and provide some characterization theorems. Finally, we extend the concept of an interval-valued fuzzy subgroup with thresholds to the concept of an interval-valued fuzzy left (right)-filter with thresholds of s.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74081063","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}

{"title":"Performance evaluation on aggregate bases of real estate in a mixed asset portfolio in Lagos","authors":"S. Anule, Z. T. Jagun, M. Omirin, A. H. Bornoma, A. Ahmed","doi":"10.31580/OJST.V1I1.152","DOIUrl":"https://doi.org/10.31580/OJST.V1I1.152","url":null,"abstract":"This paper evaluates the performance of direct real estate in a mixed-asset portfolio, to ascertain whether the inclusion of real estate in the portfolio helps it perform better or not. Annual Transaction prices of government bonds, treasury bills, development stocks and commercial papers for a ten year period (2005-2014) were retrieved from the CBN bulletin. Annual rental values for commercial offices were collected through questionnaires administered on 220 out of 309 estate firms within the study location using simple random sampling technique. 165 questionnaires were returned and analyzed. The portfolio risk and returns were calculated with and without real estate to check performance at both levels. Correlation analysis was used to compare the strength of relationship and co-movement of assets. Findings show that real estate performed better than other assets giving higher returns though with higher risk. This can be attributed to the 2009 crash in the Nigerian stock market which made investors turn to real estate on the basis of security. However, correlation analyses of the assets revealed a moderately positive correlation indicating little or no diversification benefit. This paper recommends further study using direct and indirect real estate only to determine the level of performance on a risk and return basis.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82610071","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}

{"title":"Deep Inferior Epigastric Perforator Flap (D.I.E.P) for Breast Reconstruction: Impact of Intraoperative Intrathecal Morphine on Outcome","authors":"M. Aziz, K. Halenarova, E. Schröder, V. Kamps, M. Paesmans, M. Khalife, F. Urbain, M. Sosnowski","doi":"10.11131/2018/101325","DOIUrl":"https://doi.org/10.11131/2018/101325","url":null,"abstract":"Background: Pain control after breast reconstruction with Deep Inferior Epigastric Perforator (DIEP) often requires intravenous narcotic analgesia and inpatient hospitalization. Intrathecal morphine (ITM) administration analgesia is increasing in popularity because it decreases the use of intravenous analgesic medications and offer comparable pain relief with less systemic side effects. \u0000Questions/purposes: The aim of this retrospective study was to evaluate the effect of intrathecal morphine on postoperative morbidity of breast reconstruction by Deep Inferior Epigastric Perforator flap and compare it with intravenous narcotic analgesia. Methods: 269 patients underwent immediate or delayed DIEP reconstruction after mastectomy, by the same surgeon, at Jules Bordet Institute. Patients receiving ITM analgesia (300 μ) were matched 1:3 with patients undergoing intravenous narcotic analgesia for pain control in the same years by the same surgeon. Differences in peri- and postoperative complications across the two groups were assessed. Results: The two groups were comparable in terms of demographic characteristics and factors of morbidity. Intraoperative variables were not statistically different between the groups except for intraoperative blood loss (P = 0.0001), transfusion (P = 0.0001) and Intraoperative liquid requirement (p = 0.0001). Intra and postoperative blood pressure were lower in ITM group (p < 0.05). Patients in ITM group showed lower postoperative analgesia requirement (P < 0,0001), less respiratory complications and less acute respiratory failure (P = 0,003 and P = 0,004, respectively). No statistically significant differences in the length of hospital stay (LOS) were noted \u0000Conclusion: We found that intrathecal morphine analgesia was associated with less blood loss and fluid administration, better postoperative pain control, and less respiratory complications with an acceptable security profile than intravenous narcotic analgesia. Clinical relevance: \u0000This study suggests that using intrathecal morphine may result in less blood loss and blood transfusion, better postoperative pain control, and less respiratory complications.","PeriodicalId":19674,"journal":{"name":"Open Access Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85490773","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}