Theory of Computing Systems \/ Mathematical Systems Theory最新文献_第8页

An Efficient Palladium-Thiourea Catalysed Heck Cross-Coupling Reaction for Molecular Electronic Interest 一种高效的钯-硫脲催化Heck交叉偶联反应的分子电子兴趣

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-08-25 DOI: 10.7454/MST.V21I2.3081

W. Khairul, M. Shariff, R. Rahamathullah, A. Daud, M. Shamsuddin, S. K. C. Soh

{"title":"An Efficient Palladium-Thiourea Catalysed Heck Cross-Coupling Reaction for Molecular Electronic Interest","authors":"W. Khairul, M. Shariff, R. Rahamathullah, A. Daud, M. Shamsuddin, S. K. C. Soh","doi":"10.7454/MST.V21I2.3081","DOIUrl":"https://doi.org/10.7454/MST.V21I2.3081","url":null,"abstract":"The synthesis and utilization of C-C bonds formatio n are concerned about the key steps for the buildin g of several conducting molecular electronics involving many asy mmetric catalysts approached, which is an essential task that most researchers would ignore in preparing these materia ls to enhance the production yield of cross-couplin g materials. Despite the enormous progress, there still remains great demand for economic and practicable cross-c upling processes involving ultra-low catalyst loadings wit h high turnover numbers due to the employment of co nventional metal catalyst. Thus, there has been an excessive i nterest to cultivate non-phosphine palladium cataly s s for excellent achievement of activity, stability, and substrate t olerance which permit the coupling reactions to be conducted under mild reaction condition at ambient atmosphere. In t his contribution, N-(4-nitrophenylcarbamothioyl)-N’ -(4methylbenzoyl) thiourea ( LT1 ) and its metal complex of MLT1 featuring Pd (II) have been successfully character ised via typical spectroscopic methods namely; Infrared (IR) spectroscopy, Ultraviolet-visible (UV-Vis) spe ctroscopy, CHNS elemental analysis, and Nuclear Magnetic Reson ance ( H and C NMR). In turn, catalytic studies of palladium catalyst ( MLT1 ) were tested for its homogenous catalytic activity in Heck cross-coupling reaction. The reaction was monitored by Gas Chromatography-Flame Ionisation De tector (GC-FID). Results reveal that MLT1 exhibits 100% of conversion starting material into a cross-coupling product, which was alkene-based compound.","PeriodicalId":22842,"journal":{"name":"Theory of Computing Systems \\/ Mathematical Systems Theory","volume":"44 1","pages":"58-64"},"PeriodicalIF":0.0,"publicationDate":"2017-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91157597","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: 3

Spectroscopic Contrast of Diarylethene Molecules on Octanethiol Monolayer 辛烷硫醇单层上二乙烯分子的光谱对比

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-08-24 DOI: 10.7454/MST.V21I2.3084

A. Arramel, T. Kudernac, N. Katsonis, B. Feringa, B. Wees

{"title":"Spectroscopic Contrast of Diarylethene Molecules on Octanethiol Monolayer","authors":"A. Arramel, T. Kudernac, N. Katsonis, B. Feringa, B. Wees","doi":"10.7454/MST.V21I2.3084","DOIUrl":"https://doi.org/10.7454/MST.V21I2.3084","url":null,"abstract":"We present a systematic scanning tunneling microscopy (STM) study of bias-dependent imaging of disulfur diarylethene (2S-DE) molecules on octanethiol (C8) monolayer at room temperature. In a rigid confinement of the C8 matrix, we did not observe any significant variation in the appearance of the 2S-DE. On the contrary, a reversal in the apparent height of the 2S-DE was present when the molecule was situated on a gold vacancy island. We attributed this finding to the presence of a new electronic state that became accessible for a tunneling event. In addition, the C8 surface structure underwent a reversible phase transformation from root 3 x root 3 R30 degrees hexagonal to c(4x2) square superlattice when the bias voltage was reduced from -825 mV to -425 mV or vice versa. Under a finite bias voltage, an appreciable topographic variation of the 2S-DE signature was demonstrated for the first time. This finding can be ascribed to a finite overlap of the associated wave functions that occurred between the tip state and the 2S-DE molecular energy level. We believe that physical insight on the bias-dependent imaging of organic molecules on solid surface is important towards the advancement of molecular electronics-based devices.","PeriodicalId":22842,"journal":{"name":"Theory of Computing Systems \\/ Mathematical Systems Theory","volume":"46 1","pages":"75-82"},"PeriodicalIF":0.0,"publicationDate":"2017-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91323208","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

Personality Trait Based Intervention for Workplace Accident Prevention 基于人格特质的工作场所事故预防干预

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-08-24 DOI: 10.7454/MST.V21I2.3087

Y. Yassierli, N. Nurhayati, Marisa Anatasia, S. Bahri

引用次数: 2

Urban Drainage Management and Flood Control Improvement Using the Duflow Case Study: Aur Sub Catchment, Palembang, South Sumatra, Indonesia 城市排水管理和防洪改善——以Duflow为例研究:印度尼西亚南苏门答腊岛巨港的Aur集水区

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-08-24 DOI: 10.7454/MST.V21I2.3085

C. Fraiture, R. H. Susanto, F. X. Suryadi, Harrini Mutiara Hapsari Wahyu

{"title":"Urban Drainage Management and Flood Control Improvement Using the Duflow Case Study: Aur Sub Catchment, Palembang, South Sumatra, Indonesia","authors":"C. Fraiture, R. H. Susanto, F. X. Suryadi, Harrini Mutiara Hapsari Wahyu","doi":"10.7454/MST.V21I2.3085","DOIUrl":"https://doi.org/10.7454/MST.V21I2.3085","url":null,"abstract":"Urban flooding often times staggers the livelihood in an urban area, which most likely happens in the lowland urban area. Therefore, the existing urban drainage system hould be improved in order to tackle the upcoming urban flooding events, which are more than likely to be more devas tating than those in the previous years. The resear ch location is in Palembang, Sumatra, Indonesia, where 30% of its urb an part is a lowland area. The selected Aur Sub Cat chment is located in Silaberanti. The main objective of this re earch is to improve the current drainage system in order to achieve the optimal design for urban drainage arrangement. This research was developed using Duflow Modelling Studio 3.8.3 in collaboration with ArcGIS 10.1 to schematize the dr ainage system and analyse the spatial and topograph ical condition of the research area. As a result, there are three dev lopment scenarios established by Duflow Modelli ng Studio in order to improve the drainage system in the research area . The first scenario is the current and extreme con dition in the study area. The second scenario is the extreme condition, which is represented by the extreme rainfall. The third scenario is the improvement possibilities of the existing drain age system. There are three different types of impr ovements and modifications for the third scenario which are: can al dredging, canal dike/embankment, a pump installa tion, and a flap gate installation. In conclusion, based on three differe nt scenario analyses, the most feasible, suitable, eff ctive, and efficient alternative for overcoming the flooding in Silabera nti is a flap gate installation combined with dike construction in the flood risk sections of the river because it works a utomatically depending on the water level in the Ri ver.","PeriodicalId":22842,"journal":{"name":"Theory of Computing Systems \\/ Mathematical Systems Theory","volume":"23 1","pages":"83-92"},"PeriodicalIF":0.0,"publicationDate":"2017-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80035772","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

Physical and Mechanical Properties of Palm Kernel Oil-Based Polyester Polyurethane/Multi-Walled Carbon Nanotube Composites 棕榈仁油基聚酯聚氨酯/多壁碳纳米管复合材料的物理力学性能

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-08-24 DOI: 10.7454/MST.V21I2.3083

K. M. Amin, M. A. Zailani, N. Zulkifli, K. Badri

{"title":"Physical and Mechanical Properties of Palm Kernel Oil-Based Polyester Polyurethane/Multi-Walled Carbon Nanotube Composites","authors":"K. M. Amin, M. A. Zailani, N. Zulkifli, K. Badri","doi":"10.7454/MST.V21I2.3083","DOIUrl":"https://doi.org/10.7454/MST.V21I2.3083","url":null,"abstract":"In this study, polyurethane (PU) films from palm ke rn l oil-based polyester (PKO-p) incorporated multi -walled carbon nanotubes (MWNTs) are prepared via a evaporative casting method. Nanoparticle fluid d ispersions containing 0.02%, 0.03%, and 0.05% wt. of MWNTs are added into PKO-p based resin and mixed by digital probe sonicator fo r 30 min followed by mixing with isocyanate to produce PU-MW NTs composite films. The mechanical properties, swe lling, water vapour transmission rate (WVTR) and conductiv ity of the PU-MWNTs composite films are examined. R esults show that the toughness (T) or flexibility, the ten sile strength (TS), and Young’s modulus (YM) values of PU-MWNTs composite films increase with the increasing concen trations of MWNT. In contrast, the water vapour tra nsmission rate (WVTR) and swelling test of PU-MWNTs composite film s decrease with the increase of MWNT concentrations . For conductivity testing, the film with 0.05 wt.% MWNT (PU-5) has the highest conductivity value at 2.19 x 10 S cm. In summary, incorporation of MWNTs has improved the me chanical properties of the polyurethane composites film .","PeriodicalId":22842,"journal":{"name":"Theory of Computing Systems \\/ Mathematical Systems Theory","volume":"228 1","pages":"70-74"},"PeriodicalIF":0.0,"publicationDate":"2017-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89172922","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

Residual Stress Measurements on the TIG Weld Joint of 57Fe15Cr25Ni Austenitic Steel for Structural Material Applications by Means X-Ray Diffraction Techniques 用x射线衍射技术测量结构材料用57Fe15Cr25Ni奥氏体钢TIG焊接接头残余应力

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-08-24 DOI: 10.7454/MST.V21I2.3080

P. Parikin, A. H. Ismoyo, R. Iskandar, A. Dimyati

引用次数: 2

A Study on Dielectric Properties of The Cellulose Derivative-NH4Br-Glycerol- Based The Solid Polymer Electrolyte System 纤维素衍生物- nh4br -甘油基固体聚合物电解质体系介电性能研究

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-08-24 DOI: 10.7454/MST.V21I2.3082

N. Rasali, Saifful K Muzakir, A. S. Samsudin

引用次数: 11

Ethanol Purification Using Activated Natural Zeolite 活化天然沸石提纯乙醇

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-08-24 DOI: 10.7454/MST.V21I2.3086

C. Purnomo, N. Putri, I. Perdana, H. Hinode

引用次数: 0

Plume Contamination Measurements of an Additively-Printed GOX/ABS Hybrid Thruster 增材打印GOX/ABS混合推进器羽流污染测量

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-07-10 DOI: 10.2514/6.2017-4982

D. Brewer

{"title":"Plume Contamination Measurements of an Additively-Printed GOX/ABS Hybrid Thruster","authors":"D. Brewer","doi":"10.2514/6.2017-4982","DOIUrl":"https://doi.org/10.2514/6.2017-4982","url":null,"abstract":"PLUME CONTAMINATION MEASUREMENTS OF AN ADDITIVELY-PRINTED GOX/ABS HYBRID THRUSTER by David A. Brewer, Master of Science Utah State University, 2018 Major Professor: Dr. Stephen A. Whitmore Department: Mechanical and Aerospace Engineering Historically, due to the lack of a reliable, on-demand, and multiple-use ignition methodology, hybrid rockets have never been previously considered for in-space propulsion. Recently, the Propulsion Research Laboratory at Utah State University has developed unique arc-ignition system that overcomes this problem and allows hybrids to be started, stopped, and restarted with a high degree of reliability, and requiring a low power input. The technology is derived from the unique electrical breakdown properties of 3-D printed plastics like ABS. Because ABS is an entirely new material for propulsion applications, and no database exists to describe the potential deleterious effects of the exhaust plume on spacecraft surfaces. Adsorption of propellant effluents on spacecraft surfaces can create multiple operational concerns; for example, deposition of molecules on solar arrays and thermal control surfaces can lead to decreased power production and increased spacecraft temperatures. This paper presents the results from a set of preliminary","PeriodicalId":22842,"journal":{"name":"Theory of Computing Systems \\/ Mathematical Systems Theory","volume":"1 1","pages":"10"},"PeriodicalIF":0.0,"publicationDate":"2017-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72872072","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: 8

Using Nucleon Multiplicities to Analyze Anti-Neutrino Interactions with Nuclei 用核子多重度分析反中微子与原子核的相互作用

Theory of Computing Systems \/ Mathematical Systems Theory Pub Date : 2017-07-01 DOI: 10.2172/1371577

M. Elkins

引用次数: 0