bluuebunny/crossref_metadata_2025 huggingface dataset:
The Formation of Local Catalyst from Zeolite, Characterization and Performance in the Reaction
Authors: Mufrodi Zahrul , Astuti Erna , Budiarti Gita Indah
Published: June 2020

The existance of catalyst in a chemical reaction is very important. This catalyst can accelerate the chemical reaction. Currently there are local catalyst with the performance as good as commercial catalyst. One of those catalyst is zeolite. This paper determines the study of characterization of zeolite using Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD), and explains the perfomance of zeolite in the synthesis of triacetin. Catalyst from zeolite was made by mixing with H2SO4 in various concentrations, neutralization and drying. From morfology analysis by using Scanning Electron Microscope (SEM), density and X-Ray Diffraction (XRD) obtain that mixing with H2SO4 of 0.5M is better than the others. From the study of catalyst synthesis from natural zeolite it can be concluded that natural zeolite before activation has fragile structure meanwhile after being activated it was formed crystal structure. The best zeolite crystal phase was obtained from zeolite activated by using 0,5 M H2SO4 with glycerol conversion of 94.45% and triacetin selectivity of 4.01%.
Impact of Pulsed Electric Field on Glycerin Sedimentation from Biodiesel Production Process
Authors: Hinthao Thanadol , Wongwuttanasatian Tanakorn , Suksri Amnart
Published: June 2020

This research aims to study the impact of continuous pulsed electric field (PEF) on glycerin separation from Transesterification process. Transesterification process of biodiesel production using 100 ml vegetable oils with alcohol of 1:5 molar ratio together with potassium hydroxide (KOH) as catalyst 1 wt.% for the reaction. The designed glass tube reaction chamber is 250 ml contained with coaxial cylindrical electrodes. The applied voltage to an electrode was at 1 kV and frequency of 1 kHz with pulse duration of 500 μs and also 4 kHz with pulse duration of 125 μs. The results showed that the glycerin volume from transesterification process has rapidly sedimented with pulsed electric field method. It is much faster than using conventional gravity method. The sedimentation rate increases rapidly with an increasing in frequency of the applied voltage. The highest volume of glycerin sedimentation of 10.2 ml is by using pulsed electric field at 1 kV and 4 kHz.
Identification of Cacao Peels Potential as a Basic of Electrodes Environmental Friendly Supercapacitors
Authors: Yetri Yuli , Mursida Mursida , Dahlan Dahyunir , Taer Erman , Agustino Agustino , Muldarisnur Muldarisnur
Published: June 2020

Identification of the potential of cacao peel as the basic material of environmentally friendly supercapacitor electrodes had been identified. This identification was carried out through analysis of specific dimensions, densities, and capacitances. Activated carbon electrodes were made by a combination of chemical and physics activation methods. The technique of preparing carbon electrodes started from pre-carbonization, milling, chemical activation, pellet making, carbonization, and completed it with physics activation. In addition, the chemical activation applied 0.3 M KOH activator, whereas the physical activation used CO2 gas at a temperature of 700°C. The physical properties were tested by density and X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy Dipersive X-Ray (EDX). While the electrochemical properties were tested using the Ciclic Voltammetric (CV) method. The results showed that the mass, diameter, thickness, and density of the electrode decreased after passing the carbonization-activation process. A value of 2θ in the range of 23,569o for the reflection fields 002 and 44,781o for the reflection field 100 was obtained in the XRD measurements . The X-ray diffraction curve pointed out that the surface area of C 0,3 M sample was sizeable with the Lc value and lattice distance d002 around 20,01669 Å and 3,771705 Å. SEM analysis indicated the presence of pores between particles spread almost evenly on the surface of the sample, with an irregular and elongated shape. EDX testing showed carbon element of 87.05% while atomic percentage of 91.02%, and correspondently, electrochemical test showed the value of specific capacitance obtained at a concentration of 0.3 M was 90.2 F/gr with a density of 0.850gr/cm3. From the results of the tests obtained, it was shown that cacao peels was very potential to be used as electrodes for supercapacitors.
Weighted Spacer Design for Elevated Temperature Conditions to Mitigate Barite Settling by Identifying Suitable Viscosifier
Authors: Pandey Shantanu Savita , Tripathi Rajnish , Kumar Govindarajan Suresh
Published: June 2020

Any successful primary cementing operation at elevated temperature condition requires an efficient displacement of fluid surrounding the casing by cement slurry. In such conditions the cement slurry should be designed in such a way that it should be compatible with both cement and drilling mud. To achieve these requirements we designed the cement slurry with weighted spacer. Spacer is a barrier between cement & mud so that they should not mix with each other, also all these fluids should be incompatible inorder to avoid cement aggregation. The displacement efficiency during cementation is directly dependent on discharge rate, but however due to formation fracture pressure constraints, the discharge rate is limited, hence designing spacer becomes very crucial. This phenomenon becomes more pronounced at higher temperature as turbulent flow efficiency reduces due to the presence of weighting agent. The drive of the present work is to identify a suitable viscosifier to avoid settling of weighing agents in spacer and to maintain the stability of rheology admixture at elevated temperature condition. Laboratory tests were performed for compatible deformation and flow of matter with cement slurry-spacer-mud at temperature range (80-140°C) on a rotational viscometer as per the procedure of API RP 10B-2. The volumetric proportions of the cement slurry/spacer and spacer/mud admixtures were prepared with various ratios: 95/5, 75/25, 50/50, 25/75, and 5/95. Rheological compatibility of fluids (cement & spacer and mud & spacer) is evaluated by computing the R-Index Value (R) which is calculated by subtracting highest 100 rpm reading of admixture from highest rpm reading for an individual fluid for the given range of elevated temperature condition. The calculated R-Index Value can then be utilized to comment on fluid compatibility. After finalization of chemical compatibility, rheological hierarchy was achieved by incorporating the friction pressure loss with respect to discharge rate of an individual fluid for the given range of elevated temperature condition. The spacer system used achieved stable compatibility and efficient rheological hierarchy at elevated temperature cementing conditions. In addition, by comparing the results between the two different spacer systems, the role of hydration in attaining rheological compatibility is computed. This study will in turn prove helpful in figuring out the better spacer system which will play a vital role for better displacement and cementation quality.
Study on Mechanical Properties of Multilayer Graphene/Epoxy Nanocomposites
Authors: Huang Jen Ching , Lin Tsung Ching
Published: June 2020

In this paper, the implementation and testing of multilayer graphene/epoxy resin nanocomposites are discussed. Firstly, the epoxy resin hardener is mixed with the multilayer graphene, and then mixed with the main agent, then poured into the mold, and the low temperature cooling system is used. The curing time of the epoxy resin is slowed down, and the bubble is removed before the complete hardening by the vacuum defoaming method, and the mechanical properties such as tensile strength and toughness are compared with the pure epoxy resin after being sufficiently hardened. In this paper, we investigated the effect of multilayer graphene content on mechanical properties by using the tensile test and impact test. We discussed the effect of multilayer graphene content on the coefficient of elasticity of the multilayer graphene/epoxy resin composites at different stretching rates. And the toughness of the multilayer graphene/epoxy resin composites was evaluated by impact test. After the experiment, it was found that the stretching rate has a certain degree of influence on the grapheme/epoxy resin composite material. And that the addition of 2% multilayer graphene to epoxy resin had the best effect and could effectively improve the coefficient of elasticity and toughness.
An Internal Damage Real-Time Monitoring System Using CFRP-OFBG Plates
Authors: Zhao Jun , Liu Peng Fei , Xu Yi Yi
Published: June 2020

Composite material brings many challenges in structural health monitoring (SHM), especially in internal damage detecting. CFRP-OFBG, using Optical Fiber Bragg Grating (OFBG) sensors embedded in Carbon Fiber Reinforced Polymer (CFRP) composite structures, has been widely used in the field of structural reinforcement with smart sensing features. This work developed a real-time monitor system to detect internal damage by using dense arrayed fiber-optic sensor embedded in CFRP-OFBG. A classical triangulation procedure is selected and improved in damage location detection algorithm. Experimental results showed this design is an efficient and lightweight system in detecting internal damage for CFRP-OFBG materials.
Thermomagnetic Analysis of the Crystallization in Soft Magnetic Nanocrystalline Alloys
Authors: Tsepelev Vladimir S. , Starodubtsev Yuri N. , Wu Kai Ming , Tsepeleva Nadezhda P.
Published: June 2020

In this work, we investigated the dynamics of nanocrystallization from the amorphous state of the Fe72.5Cu1Nb2Mo1.5Si14B9 alloy together with magnetic phase transformations. The thermomagnetic analysis was performed with the simultaneous recording of the temperature inside the core by a thermocouple and the inductance of the winding wound over the core. It was found that the permeability of the core after the crystallization peak first increases rapidly, and then decreases and stabilizes at some level. Permeability growth begins at a temperature that coincides with the Curie point of the Fe80Si20 solid solution. A decrease in permeability was associated with stabilization of the structure of the amorphous and crystalline phases upon cooling. With decreasing temperature, the active redistribution of chemical elements is suppressed, and silicon atoms occupy a stable position in the crystal lattice of iron. Nanocrystalline cores have different Curie temperatures in the state after the peak of crystallization and 300 seconds after the peak. This indicates the continuation of the diffusion of silicon from the amorphous matrix into Fe-Si nanocrystals for some time after the crystallization peak.
Analysis of the Effect of Fly Ash on Compressive Strength of Concrete Using Neural Network and Parameter Analysis
Authors: Wang Xiao Yong
Published: June 2020

Compressive strength is a crucial design index of fly ash blended concrete. This study presents an estimation model to show the effect of fly ash on the strength development of concrete. First, a neural network model is proposed to estimate the compressive strength of fly ash blended concrete. The input variables of the neural network are water-to-binder ratio, fly ash replacement ratio, and curing ages. The output result of the neural network is a strength. The range of water-to-binder ratio is from 0.3 to 0.5, the range of fly ash replacement ratio is from 0 to 0.55, and the range of test age is from 3 days to 180 days. The neural network gives an accurate evaluation of compressive strength. Second, parameter analysis is carried out based on the neural network model. The results of parameter analysis show that the effect of fly ash on strength is dependent on water-to-binder ratio. The using of high-volume fly ash with low water-to-binder ratio concrete is a rational option.
Mechanical Characteristic of Surface Layer of Concrete with Recycled SiC
Authors: Pernicová Radka , Kolomaznik Tomas
Published: June 2020

Abrasion measurement of surface of specific concrete elements is presented in this paper. This article is focus on determination of wear resistance and strength of concrete floor. This concrete contains silicon carbide binder and part of it is recycled origin. This material are high on Mohr hardness scale and are they are suitable for use in indoor and outdoor areas with the heaviest traffic loads. From the results, follows that the even small differences in mixture (using new and recycled binder) has impact on the mechanical parameters. However, it is possible design mixture with recycled binder and reach characteristic of concrete, which are almost similar to the normal concrete.
Thermal Conductivity Enhancement in Polymer-Clay Nanocomposite Using Casting Techniques
Authors: Razonado Ivy Ann C. , Suarnaba Emee Grace T. , Madriaga Lawrence V. , Diaz Leslie Joy L.
Published: June 2020

Nowadays, there is a need for efficiency and miniaturization in electronic products. However, in the chip level, heat dissipation can limit the performance of these gadgets. Semiconductor industries addressed this thermal management challenge by using thermal interface material. Previous studies have shown that polymer-clay nanocomposite has an enhanced thermal conductivity which can be used as a thermal interface material. In this study, the aim was to determine the effect of casting techniques on the microstructure and thermal conductivity of the polymer-clay nanocomposites. Solution intercalation method was used in fabricating the 5vol% polymer-clay nanocomposite. Organo-modified montmorillonite (MMT) was dispersed in unsaturated polyester (UP) matrix by means of high frequency ultrasonication and formed using two casting techniques; mold casting and tape casting. Results showed a slight increase in the thermal conductivity coefficient of the tape-casted samples at 2.99 W/m-K compared to the mold-casted samples at 2.87 W/m-K. Transmission electron microscopy (TEM) and x-ray diffraction (XRD) results exhibited dispersed microstructure for both casting techniques. Polymer intercalation of ~16% increase in d-spacing of clay for mold-casted samples and with a ~20% increase in d-spacing of clay for tape-casted samples were observed. With these microstructure modifications, the increase in the thermal conductivity coefficient of the tape-casted samples can be attributed to the shear force employed by the tape casting technique.
The Potential of Black Rice Husk Ash (BRHA) in Brick Productions
Authors: Dahalan Nurol Huda , Mutalib M.H. Abdul , Yee Hooi Min , Ooi Mohd Haris Ridzuan , Hamid Haslinda Abdul
Published: June 2020

A lot of researchers have studied the rice husk brick and it is the most widely used material in earth construction. Although study has been carried out on rice husk brick previously, more in-depth study on the aspect of the optimal replacement levels of local black rice husk ash to the Ordinary Portland Cement (OPC) that will meet stated standard requirements for non load-bearing bricks need has not been carried out. Despite all the natural materials have been used in construction materials, black rice husk ash is important to be reviewed based on the rationale of availability and growing rice husk production year by year due to high demand of rice supply.
Kinetics and Isotherms of an Iron-Modified Montmorillonite/Polycaprolactone Composite Nanofiber Membrane for the Adsorption of Cu(II) Ions
Authors: Somera Lester Raj , Cuazon Ralph , Cruz John Kenneth , Diaz Leslie Joy L.
Published: June 2020

Exposure to toxic concentrations of Cu (II) continues to rise as developing countries undergo rapid industrialization. Because of its high solubility in water, improperly disposed copper contaminate our water sources in its aqueous Cu (II) form. A nanofiber membrane composed of iron-modified montmorillonite (Fe-MMt) dispersed in polycaprolactone (PCL) was electrospun for the adsorption of Cu (II) ions. Kinetics and isotherm models were used to study the adsorption behavior of the fabricated membrane. The adsorption capacity of this membrane was observed as a function of increasing contact time and initial Cu (II) ion concentration. Kinetic studies showed that Cu (II) adsorption follows a pseudo-second order kinetic model, while isotherm studies determined the adsorption to be monolayer as described by the Langmuir isotherm. Furthermore, it was observed that the adsorption capacity increases with increasing contact time, and with increasing initial metal ion concentration up to a maximum value of 6.44 mgg-1. Lastly, the Dubinin-Kaganer-Radushkevich isotherm was used to calculate for the sorption energy and determine the type of adsorption. A sorption energy of-5.83 kJmol-1 was obtained, thus the adsorption was classified to be physical.
Doping Concentration Tuning and Plasmonic Optical Properties Modelling of Metal Nano Particles Utilizing FDTD Method
Authors: Rafiee Mehran , Chandra Subhash , Ahmed Hind , Glenn Aaron , Mc Loughlin Conor , McCormack Sarah
Published: June 2020

Among noble metal nanoparticles (MNPs), plasmonic effect of gold and silver nanoparticles (Au NPs and Ag NPs) is interesting to study due to their high near-field energy. This makes them excellent particles to absorb and scatter incident radiation in optical applications such as coupling them to fluorescent emitters to enhance their radiative decay and emission rate. This paper reviews and studies the methodology required for tuning the doping concentration and modelling plasmonic optical properties of Au NPs and Ag NPs by using finite difference time domain (FDTD) method. The frequency-dependent optical behaviour of MNPs is discussed. Plasmonic optical properties of MNPs can be characterised by their dimension, shape and doping concentration. Dimension and shape of MNPs can be simply defined in FDTD space grid (known as Yee grid). However, tuning MNPs doping concentration is more challenging which is undertaken by changing the spacing between MNPs and lateral boundaries of FDTD Yee grid. This can be vastly useful in Au NPs and Ag NPs optical optimization and applications to estimate plasmonic resonance based on doping concentration of particles.
Thermal Stability of Epoxy Resin Modified with Developed Flame Retardant System Based on Renewable Raw Materials
Authors: Salasinska Kamila , Gajek Agnieszka , Celiński Maciej , Mizera Kamila , Borucka Monika , Duszak Katarzyna
Published: June 2020

A novel flame retardant system, embraced shell (S) and histidine diphosphate (H) as intumescent flame retardant developed in the Department of Chemical, Biological and Aerosol Hazards laboratory, was added to the epoxy resin and examined. The influence of flame retardant system on the thermal stability was assessed based on thermogravimetric analysis (TGA). Moreover, the flame retardant components were characterized by grain size distribution. It was found that the incorporation of the developed flame retardant system caused the formation of thermal stable char, which may inhibit the burning process.
Development of a Bioanod, Experimental Studies and Mathematical Modelling of Membraneless Microbial Fuel Cell
Authors: Koltsova Eleonora , Bogdanovskaya Vera , Vasilenko Violetta , Kalenov Sergei , Korchagin Oleg , Fokina Evgeniia
Published: June 2020

Microbial fuel cell (MFC) is a new technology that uses microorganisms to extract energy from complex organic mixtures. On the basis of aerobic granular sludge we have selected a nitrogen-fixing community of microorganisms that was immobilized on a carbon material (graphite foam, carbon nanotubes). The MFC anode has been developed on the basis of selected biological material. A membraneless glucose / oxygen MFC with bioanode and cathode based on non-platinum group metals or laccase enzyme has been developed. A mathematical model describing the processes in the MFC has been developed, on its base the calculations have been carried out.
Supercapacitors with Extended Operating Potential Window
Authors: Kouchahcvili Lia , Entchev Evgueniy
Published: June 2020

Electrolytes in supercapacitors (SCs) play an important role on their energy storage capacity. The electrochemical stability of electrolytes defines the operating potential of the SCs and their viscosity defines a power density of the SCs. In the present work, a new method for composing an electrochemically stabile but high viscous ethylene glycol (EG) based electrolyte has been discussed. A viscosity of the EG then reduced by dissolving an inorganic lithium tetrafluoroborate (LiBF4) salt. The affect of the concentration of the salt on EG viscosity has been investigated. The best capacitive performance of activated carbon (AC) based electrodes with large operating potential (-1.7V to 1.7V) was found in 3M LiBF4/EG electrolyte.
Study on Evolutionary Approaches for Improving the Energy Efficiency of Wireless Sensor Networks Applications
Authors: Lubin Balasubramanian D. , Govindasamy V.
Published: June 2020

One of the drastically increasing and tremendously demanding networks is the wireless sensor network, which provides an elastic platform where any user can design their sensor-based applications easily. Most of the WSN applications can be accommodated in the existing infrastructure or not require any predefined infrastructure. But it has a wide range of applications across the globe which further increases the complexity of the problems in it. Because WSN is a resourceconstrained kind of network where energy consumption is one of the major problems. Some of the problems were addressed by deterministic approaches discussed in earlier research works. In case of efficient routing of messages across the network dynamic programming is one of the deterministic approaches which addresses an efficient routing algorithm. But for a wide range of WSN deterministic algorithms are a time-consuming process. On the other hand, evolutionary algorithms are one such fast-growing domain in the past few decades which addresses many of WSN problems. This paper is a comprehensive survey on the Application of Evolutionary Algorithms in Wireless Sensor Networks. A detailed description of the papers taken for the survey is tabulated in this paper.
Foundations and new horizons for causal inference
Authors: Meinshausen Nicolai , Peters Jonas , Richardson Thomas S. , Schölkopf Bernhard
Published: June 2020

While causal inference is established in some disciplines such as econometrics and biostatistics, it is only starting to emerge as a valuable tool in areas such as machine learning and artificial intelligence. The mathematical foundations of causal inference are fragmented at present. The aim of the workshop "Foundations and new horizons for causal inference" was to unify existing approaches and mathematical foundations as well as exchange ideas between different fields. We regard this workshop as successful in that it brought together researchers from different disciplines who were able to learn from each other not only about different formulations of related problems, but also about solutions and methods that exist in the different fields.
Penerapan Yellow Box Junction Pada Perlintasan Sebidang Untuk Mengurai Antrian Kendaraan Akibat Penutupan Pintu Perlintasan Sebidang
Authors: Putra I Dewa Gede Tantara Tesa , Purwanto Edi
Published: June 2020

Good transportation is smooth, safe, safe, convenient and efficient transportation. In order to realizesuch good transportation, effort is needed in overcoming various transportation problems that existtoday and then do various further development. One of the transportation problems is the locationof the intersection of Jalan Teuku Umar by crossing a plot of KS Tubun Road between the road andthe railroad track. The crossing of this plot resulted in congestion in the aftermath of the closure ofthe railway crossing. This is very dangerous and causes a burden of loss if there is a train thatpasses at close intervals due to the unraveling of congestion that occurred on Jalan Teuku Umar.The method in this research is research and development. In this research, the research location isTeuku Umar Street. The data collection is divided into primary data and secondary data. Primarydata were obtained by directly conducting a survey to a research site on Jalan Teuku Umar. Theobservation period in the field is done on Sunday, 17 September 2017 for 14 hours from 06.00 to20.00 WIB. Secondary data is data sourced from institutions - insatansi related to research that isPT. Kereta Api Indonesia on the schedule of passenger trains and freight passing through a planeof Teuku Umar Street. Based on the analysis of the application of yellow box junction at theintersection can decompose the queue length that occurs on Teuku Umar Street.
Pendekatan Antrhopometry Tinggi Penglihatan Mata Sebagai Dasar Ukuran Redesain Median Jalan (Studi Kasus Jalan Diponegoro Simpang Gili Tugel)
Authors: Mushoffan Ali , Hidayati Tri Susila
Published: June 2020

The road median is a physical separation of the traffic lane that serves to eliminate traffic conflictsfrom the opposite direction, which in turn will improve the safety of traffic. road infrastructure factorsthat do not meet safety standards. An example is due to the manufacture of a median road at eachintersection that does not meet such standards as too wide and too high such as in the tegal city ofDiponegoro, this indicates reduced main function of the median road, Antrhopometry is anapproximation of the size of the human body. In this study discusses how to make the mediandesign does not eliminate the main function of traffic separator traffic by using antrhopometry. Thedata used are high-dimensional data of sight and median dimension size, looking forstandardeviation as the lowest value of high vision value to find the right value as a redesignracetrack.
Pengaruh Fase Apill Pada Simpang Terhadap Perilaku Menunggu Pengguna Sepeda Motor Di Kota Tegal
Authors: Dwiyantara Arga , Pramudyawardani Heni Putri , Kamal Muhammad Rikzam
Published: June 2020

Intersection is a critical area on a highway where a point of conflict and where bottlenecks due tothe merging of two or more roads. The junction arrangements that do not fit will cause trafficproblems, particularly the intersection you have installed APILL. Violations often occur are agresivedriving behavior in the form of the behavior of the wait. Based on existing conditions, the behaviorof waiting that occurred at an intersection with two and four phase settings have a difference.Violations committed by users i.e. a motorcycle broke through APILL, stop at the stop line and theopposing lanes consuming. APILL phase setting should resolve the problems of the particularbehavior of the wait. Methods of analysis used i.e. the dependent samples T-test test with SPSS16.0 program use. Based on the current test sig (2-tailed) of > 0.05 0.628 then it can be concludedthat there was no significant difference between the behavior of waiting at an intersection that has asetting of two and four phases.
Analisis Biaya Ban Vulkanisir Dengan Metode Roadtest Pada Perusahaan Angkutan Barang PT. JTI
Authors: Pranoto Ethys , Ahmad Syiham
Published: June 2020

Kajian yang dilakukan karena meningkatnya penggunaan dan produksi dari ban vulkanisir seiringdiperbolehkannya atau dicabutnya larangan penggunaan ban vulkanisir baik untik kendaraanpenumpang maupun kendaraan komersial atau niaga. Kajian ini dilakukan terhadap banvulkanisir pada kendaraan komersial yaitu truk. Pengujian dilakukan dengan metode roadtestguna mengetahui laju keausan tread dari ban vulkanisir. Ban vulkanisir diukur nilaikeekonomisannya dengan tetap memperhatikan ambang batas ketentuan ban. Pemenuhanketentuan ambang batas ban guna mewujudkan kendaraan yang berkeselamatan. Hasilpengujian menunjukkan adanya perbedaan laju keausan dari masing-masing ban vulkanisir.Penentuan ban vulkanisir yang digunakan pada kendaraanakanmempengaruhi biaya operasionalkendaraan.
Studi Pendahuluan: Perilaku Berkendara Anak Di Bawah Umur Ditinjau Dari Theory Of Planned Behavior
Authors: Kusumastutie Naomi Srie
Published: June 2020

Penelitian ini merupakan studi pendahuluan mengenai perilaku berkendara anak di bawah umurditinjau dari Theory of Planned Behavior (TPB). Langkah awal dalam penyusunan kuesioner TPBadalah mengidentifikasi keyakinan-keyakinan yang menonjol (salient beliefs) sebagai dasarpembentukan sikap, norma subjektif, dan persepsi kendali perilaku. Keyakinan-keyakinan yangmenonjol ini menjadi dasar penyusunan soal pada kuesioner, yang hasilnya akan digunakan untukmenyusun model perilaku berkendara pada anak di bawah umur. Pengumpulan data pada penelitianini menggunakan kuesioner terbuka, dengan responden yaitu siswa berusia di bawah 17 tahun diSMPN 1 Kota Tegal, SMAN 1 Kota Tegal, dan SMAN 5 Kota Tegal. Teknik analisis data yang digunakanadalah analisis isi. Behavior beliefs yang didapatkan adalah tidakmerepotkan orang tua, lebihcepatsampai tujuan, ditilang polisi, dan terlibat kecelakaan lalu lintas. Normative beliefs yang didapatkanadalah orang tua dan teman. Control beliefs yang didapatkan adalah adanya kebutuhan, tidakmemiliki SIM, ijin orang tua, dan kepercayaan diri.
Batas Aman Muatan Sumbu Roda Dan Temperatur Tromol Ditinjau Dari Ambang Batas Efisiensi Rem Mobil Pick Up Futura
Authors: Wijayanta Setya , Sutarjo Sutarjo , Shafa AF Nadziba , Pambudi Kurniawan
Published: June 2020

Kegagalan pengereman (rem blong) sering menjadi penyebab kecelakaan. Kelebihan muatan(Over loading) dan Temperatur tromol yang berlebihan (Over heating) sering diduga menjadipenyebab terjadinya kegagalan pengereman. Penelitian ini dibatasi pada pengaruh muatansumbu roda dan temperatur tromol terhadap efisiensi rem mobil pick up futura. Metode yangdigunakan adalah eksperimen dengan variasi kanvas original dan tiruan.Dari penelitian ini diperoleh hasil bahwa tinggi rendahnya muatan sumbu roda dan temperaturtromol berpengaruh signifikan terhadap efisiensi pengereman. Semakin tinggi muatan sumburoda dan temperatur tromol, maka semakin kecil efisiensi pengeremannya. Rumus empirishubungan antara muatan sumbu roda dengan efisiensi rem adalah y = -0,0003 x + 0,7891dengan R2 = 0,9737. Dari rumus empiris tersebut diperoleh nilai muatan kritis sumbu roda (x)963,67 Kg. Rumus empiris hubungan antara temperatur tromol dengan efisiensi rem adalah y =-0,0034 x + 0,8516 dengan R2 = 0,9041. Dari rumus empiris tersebut diperoleh nilai temperaturkritis luar tromol (x) 103,410 C. Ditinjau dari efisiensi rem yang dihasilkan dengan variasi muatansumbu roda dan temperatur tromol serta kecepatan kenaikan temperatur tromol, maka kanvasoriginal lebih baik dibandingkan kanvas tiruan (KW).
Gerçek Zamanda Bir Deprem Olayında Binaların Kullanılabilirlik Kararı İçin Sürekli Ötelenme Ölçümü
Authors: ÇELEBİ Mehmet
Published: June 2020

Ölçüm
aletleri yerleştirilmiş olan yapıların seçilen yerlerinde gerçek zamanlı yer
değiştirme, ya ivme-ölçer zaman serisi verilerinin çift entegrasyonu ya da
yüksek binaların çatılarına yerleştirilen yüksek örnekleme oranlarına sahip
diferansiyel küresel konumlama sistemi (KKS) ile elde edilir. Bu nedenle,
sensör verileri bir binanın performans seviyesi ve sağlığı ile ilgilidir.
Ötelenme oranları bir yapının hasar durumunun parametrik göstergesi olarak
hesaplanır. Tetkik ve/veya kullanılabilirlik kararı almak için çeşitli
seviyelerde eşik ötelenme oranları tahmin edilebilir. Ötelenme oranı, arka
arkaya seçilen kat çiftlerine konuşlandırılan ivme-ölçerlerden iki kat
arasındaki göreceli yer değiştirme kullanılarak hesaplanır. Bununla birlikte, KKS
ile ölçülen göreceli yer değiştirmeler zemindeki referansa göre sadece çatıdan
elde edilecek şekilde sınırlıdır. Bu nedenle bir bina için sadece ortalama
ötelenme oranı elde edilir. Yakın zamana kadar mevcut KKS sistemlerinin
saniyede 10-20 kayıt aldığı ve kullanımın sadece uzun periyotlu (T>1 sn) yapılarla
sınırlı olduğu bilinmekteydi. Son zamanlarda ise saniyede 50 örnekle kayıt
yapan diferansiyel KKS sistemleri başarıyla kullanılmaktadır ve bu KKS yaklaşımının
tüm yapı tipleri için gelecekteki faydasını mümkün kılmaktadır. Hem
ivme-ölçerlerden hem de KKS kurulumlarından elde edilen verilerle kazanılan
deneyim, sistemlerin güvenilir olduklarını, mal sahiplerini ve diğer ilgilileri
bilinçli karar almaları noktasında uyarma, önemli sarsıntılar sonrası önceden tanımlanmış
eylemleri seçmede pratik alternatifler sağladığını göstermektedir. Ayrıca, bu
tür yöntemlerin işletmeler tarafından kabul görmesi, uygulanabilirliklerinin
kanıtıdır.
Köprü Yapılarının Eş Zamanlı Sistem ve Girdi Tanılaması
Authors: GHAHARİ Seyed Farid , ÇELEBİ Mehmet , EBRAHİMİAN Hamed , CETİNER Barbaros , TACİROGLU Ertugrul
Published: June 2020

Bu makale, deprem kayıtlarını kullanarak köprü
yapılarının sistem tanılaması için yeni bir yöntem sunmaktadır. Köprüler,
genellikle yapısal elemanlarının geniş mesafelere yayılmasından ötürü, diğer
yapılara nispeten yer hareketlerinin uzamsal değişkenliğine daha hassastırlar.
Bu nedenle, özellikle temelleri değişik zemin türlerine oturan uzun ve çok
kolonlu köprülerin simülasyonlarında kullanılacak nitelikte yer hareketi
kayıtlarının ölçümü karmaşık bir süreçtir. Bilhassa hem eylemsizlik hem de
kinematik Zemin-Yapı Etkileşimi etkilerinin yaygın olduğu durumlarda, köprü Temel
Girdi Hareketlerinin doğrudan ölçümü mümkün olmayabilir. Bu çalışmada, uzamsal
olarak seyrek bir şekilde ölçülmüş sismik yapı davranış kayıtlarını kullanarak
eş zamanlı sistem ve girdi tanılaması sağlayan yeni bir yöntem önerilmektedir.
Önerilen metodun teyidi ve gerçek ölçekte problemlere uygulanabilirliğini
doğrulamak adına, yöntem Golden Gate Köprüsü'ne uygulanmış ve elde edilen
sonuçlar mevcut veriler ile karşılaştırılmıştır.
KEAUSAN CRANK PIN JOURNAL CRANKSHAFT PADA DIESEL ENGINE GENERATOR DI. MV. KARTINI BARUNA
Authors: Tristanto Prasetya  , Sarifuddin  , Budi Joko Raharjo
Published: June 2020

Crankshaft merupakan komponen mesin yang bekerja mengubah gerak lurus bolakbalikpiston dengan perantara batang piston menjadi gerak putar. Untuk mengubahnya,dengan proses sebuah crankshaft membutuhkan pena engkol (crank pin, sebuah bearingtambahan yang diletakkan di bagian ujung batang penggerak pada tiap silinder.

Mengingat pentingnya fungsi crankshaft maka keberadaan komponen mesin tersebutharus dirawat dengan baik. Dalam penelitian ini penulis menggunakan metode fault treeanalysis, yaitu metode analisa yang digunakan apabila terdapat suatu kejadian yang tidakdiinginkan atau undesired event terjadi pada suatu sistem. Sistem tersebut kemudiandianalisa dengan kondisi lingkungan dan operasional yang ada.

Dengan melaksanakan prosedur tersebut diharapkan sistem operasional dieselgenerator dapat berfungsi secara normal dan maksimal, sehingga kegiatan pelayaran danperusahaan tidak mengalami kerugian yang disebabkan terganggunya operasional kapal.Pada akhir bagian penelitian. Penulis menyajikan kesimpulan dan saran.
Oscillating among Different Traditions of Grounded Theory
Authors: Sigauke Innocent , Swansi kenneth , TSVARA PETER
Published: June 2020

Grounded theory is one of the major research designs used in qualitative studies. However, there is more than one genre of grounded theory. Some authors highlight the basic dichotomy between Strauss and Glaser’s approaches to grounded theory while still others go further to highlight that the grounded theory method is in fact more than a dichotomy, but a ‘contested concept.’ Though others seem to downplay such a contest, there are others who suggest that one does not have to choose between the two approaches, adding that a balanced approach is ideal as there is a lot to learn from all grounded theory forbearers. This paper provides an outline of the uncontested concepts of grounded theory while highlighting the options among the various grounded theory approaches.
Catatan Tentang Scleroderma pseudostipitatum Petch, Scleroderma verrucosum (Bull.) Pers., and Scleroderma nitidum Berk. (Gasteromycetes)
Authors: Rifai Mien A
Published: June 2020

Jamur Scleroderma pseudostipitatum yang hidup di tropik dikukuhkan sebagai jenis sendiri, dibedakan dari Scleroderma verrucosum yang berasal dari daerah beriklim sedang karena memiliki basidiospora yang lebih besar ditutup oleh duri-duri yang lebih pendek tetapi lebih gemuk, serta juga oleh peridium lebih kuning yang dihias dengan sisik berbeda susunan dan warnanya. Sejumlah catatan, gambar, dan pertelaan Scleroderma pseudotipitatum dan Scle-roderma nitidum Berk. serta juga kunci untuk mendeterminasinya disajikan.
Efek Jamur Endofit Asal Daun dan Akar Kacang Tanah terhadap Pertumbuhan dan Penghambatan Patogen Inangnya
Authors: Istifadah Noor , Sari I P
Published: June 2020

Keberadaan jamur endofit dalam jaringan tanaman dapat menguntungkan, merugikan atau tidak berpengaruh terhadap tanaman inangnya. Penelitian ini bertujuan untuk mengkaji pengaruh jamur endofit yang diisolasi dari akar dan daun kacang tanah terhadap pertumbuhan tanaman kacang tanah dan kemampuannya dalam menghambat patogen inangnya yaitu Sclerotium rolfsii dan Cercospora sp. secara in vitro. Sampel tanaman diperoleh dari daerah Panyingkiran (Kabupaten Majalengka), Jatinangor (Kabupaten Sumedang) dan Arjasari (Kabupaten Bandung). Isolat jamur endofit akar yang diperoleh diuji patogenesitasnya terhadap kecambah dan bibit tanaman kacang tanah. Isolat jamur endofit dari daun diuji patogenesitasnya dengan menginokulasikannya pada daun kacang tanah. Isolat jamur endofit akar yang bersifat non patogenik diuji kemampuan antagonistiknya terhadap S. rolfsii, sedangkan isolat yang berasal dari daun diuji terhadap Cercospora sp.secara in vitro. Hasil pengujian menunjukkan bahwa dari 13 isolat jamur endofit asal daun kacang tanah yang diperoleh, tiga isolat bersifat patogenik dan 10 isolat bersifat non patogenik. Semua isolat dari daun kurang efektif menekan pertumbuhan Cercospora sp. Diantara 10 isolat jamur endofit asal akar kacang tanah, sembilan isolat dapat meningkatkan pertumbuhan tanaman kacang tanah. Sebagian besar isolat jamur endofit asal akar yang diuji kurang efektif

menghambat pertumbuhan S. rolfsii secara in vitro. Diperoleh satu isolat jamur endofit akar yaitu isolat SAE (Aspergilus sp.) yang dapat menekan pertumbuhan patogen tersebut sebesar 66.9%.
Jamur Makro Di Pulau Saktu Kepulauan Seribu Jakarta Utara dan Potensinya
Authors: Noverita Noverita , Nabilah Nabilah , Siti F Y , Yudistari Yudistari
Published: June 2020

Pulau Saktu merupakan salah satu pulau yang berada dalam gugusan Kepulauan Seribu, terletak di desa Pulau Kelapa, Kepulauan Seribu, DKI Jakarta. Luas pulau berdasarkan analisis citra satelit adalah 0,172 km2, dan hampir ¾ dari luas pulau tersebut berupa hutan konservasi. Pulau ini sebelumnya dijadikan tempat wisata, dan sekarang hanya dihuni oleh penjaga rumah peristirahatan. Kondisi lingkungan basah dan lembab, serta banyak naungan sangat cocok bagi pertumbuhan banyak organisme, termasuk jamur makro. Penelitian dilakukan dengan tujuan untuk mengetahui spesies jamur makro yang ditemukan dari kawasan Pulau Saktu serta potensinya. Metode dalam penelitian ini adalah metode jalur dan plot, dengan mencatat karakter morfologi tubuh buah jamur makro disepanjang jalur penelitian. Diperoleh sebanyak 71 spesimen dari kawasan penelitian ini, 14 spesimen merupakan jamur yang termasuk sebagai bahan pangan, diantaranya Auricularia auricula, Volvariella volvacea, Lentinus sajor-cajo, Schizophyllum commune, 32 spesimen sebagai bahan obat, diantaranya Ganoderma applanatum, Daldinia concentrica, Stereum sp., Xylaria sp., Microporus xantophus.
KARAKTERISASI MORFOLOGI JAMUR ENTOMOPATOGEN DI HUTAN MANDIANGIN BANJARBARU, KALIMANTAN SELATAN
Authors: Halimah N , Imaningsih Witiyasti , Mariana Mariana
Published: June 2020

Jamur entomopatogen merupakan jamur yang hidup sebagai patogen pada serangga. Jamur ini menginfeksi serangga dengan cara masuk kedalam tubuh serangga inang melalui kutikula, saluran pencernaan dan spirakel. Selain itu mampu menginfeksi hampir semua ordo serangga. Keragaman jamur ini di Indonesia belum banyak diketahui, khususnya di kawasan hutan Mandiangin, Banjarbaru, Kalimantan Selatan. Penelitian ini bertujuan mengeksplorasi dan mengkarakterisasi genus jamur entomopaten di hutan Mandiangin. Sampel diambil sebanyak enam kali pada bulan Mei-Juli 2017. Sampel yang diambil berupa jamur yang berasosiasi dengan serangga serta menunjukkan struktur reproduksi jamur dengan ciri morfologi makroskopis memiliki bentuk stroma maupun sinema. Sampel yang berhasil diperoleh kemudian diidentifikasi secara morfologi. Sebanyak empat genera jamur entomopatogen diperoleh dari hutan Mandiangin Banjarbaru,yaitu Ophiocordyceps, Hypocrella dan Cordyceps yang ditemukan pada fase seksual serta Aschersonia ditemukan pada fase aseksual.
Potensi Inokulasi Jamur Trichoderma viride dan Glomus sp. Terhadap Produktivitas Capsicum annuum L
Authors: Santi Wira Purnama , Defiani Made Ria , Proborini Meitini Wahyuni
Published: June 2020

Cabai rawit (Capsicum annuum) merupakan komoditi pertanian yang digunakan dalam berbagai jenis produk makanan. Pemanfaatan pupuk anorganik berdampak buruk terhadap lingkungan sehingga diperlukan agen hayati, seperti Trichoderma viride dan fungi mikoriza arbuskula (FMA) untuk memperbaiki kondisi tanah. Tujuan penelitian ini mengobservasi pemberian kombinasi T. viride dan FMA Glomus sp. Terhadap produksi cabai rawit serta mengetahui dosis kombinasi optimum dalam meningkatkan produktivitas cabai rawit. Penelitian dilakukan di laboratorium Taksonomi Tumbuhan/Mikologi dan green house Program Studi Biologi, Fakultas MIPA, Universitas Udayana. Penelitian menggunakan Rancangan Acak Kelompok dengan lima perlakuan yaitu (A) tanah steril (Kontrol negatif); (B) tanah steril dan 50 spora Glomus sp.; (C) tanah steril dan 2 g pupuk anorganik CPN15-0-14 KNO3 Merah; (D) tanah steril, 5 mL T. viride dan 50 spora Glomus sp.; (E) tanah steril, 10 mL T. viride dan 50 spora Glomus sp. Setiap perlakuan memiliki lima ulangan yang terdiri dari tiga unit tanaman. Pengamatan dilakukan terhadap tinggi tanaman, jumlah buah, berat basah dan berat kering buah, berat kering tajuk, berat kering akar dan infeksi FMA. Hasil penelitian menunjukkan bahwa penambahan pupuk anorganik menghasilkan nilai tertinggi pada hampir seluruh parameter yang diamati kecuali pada persentase kolonisasi FMA. Perlakuan E menunjukkan hasil yang lebih optimum dalam produksi cabai rawit meski belum mampu menandingi pupuk anorganik.
Televizija i ljudska duša
Authors: Blaževska Daniela
Published: June 2020

“Kakva je korist čovjeku ako sav svijet zadobije a duši svojoj naudi? Ili kakav će otkup dati čovjek za dušu svoju?”
Cilj ljudskog života je spasenje duše. Čovjek mora čuvati svoju dušu od štetnih prizora. Cilj ovog rada je istražiti kako televizija kao masovni medij utječe na ljudsku dušu, pri čemu autorica analizira utjecaj televizije na um, želju i volju čovjeka koji je izložen medijskim sadržajima. U radu se izvode zaključci o negativnim efektima televizije na ljudsku dušu te se preporuča selektivna i što kraća izloženost televizijskim programima.
The Body
Authors: Rutović Željko
Published: June 2020

The popular media industry of spectacle with instruments of “seduction” produces “voluntary cosent” of man in acceptance, imitation and evaluation of distribution of corporate consumer culture. In this world man plays role beyond his ontological need and self-conscious realization of subject as thinking creature.
The aim of this paper is to problematize socio-cultural phenomenology of body transfiguration, impressions and experiences in opticum of consumerist globalization.
The new construction of “new” body is modeled on techniques of instrumentalisation, stereotyping and hybridization of narcissism as the primary reprezentational principle of such media experience.
Economic and legal subordination in modern trends of labor law development
Authors: Mihailenko Yulia , Prasolova Inna
Published: June 2020

The article discusses some trends in the development of labor law in Russia, taking into account foreign experience. We consider relations that were not previously formally regulated by law (for example, those arising from actual admission to work by an unauthorized person) or regulated by civil law from the scope of labor law. We noted that in cases where it is impossible to draw a conclusion about the sectoral nature of contractual relations and dependence of the employee, the Labor Code of the Russian Federation prescribes that they should be considered as labor relations. We also discussed the study of the evolution of the employer’s power, subordination as a specific feature of labor relations. We came to conclusion that the new expansion of labor law should be based not on legal but rather on economic interrelations between employee and employer.
The Role of painting in prevention of crime
Authors: Dahesh Mitra
Published: June 2020

Art has recently been considered as one of the therapeutic methods in medical science. Since one of the most important measures in dealing with criminals is therapeutic and habilitation measures, taking into account my personal interests in art particularly paintings and regarding the effect of artwork creation on human personality. A criminal by creating a work of art, in another word by releasing his personality can retell all hidden secrets or evacuate his inner emotions. Art has the effect of spiritual freshening, ethic and skill education, spare time making for criminals. Therefore, the subject of painting’s role in the prevention of crimes is considered to be of high importance which should be examined separately in order to highlight the importance of art and particularly paintings.
O projeto de educação para a Educação Física escolar: um olhar para as políticas educacionais dos últimos vinte anos
Authors: Prietto Adelina Lorensi , Souza Maristela Da Silva
Published: June 2020

Este estudo investigou o projeto de educação para a Educação Física escolar presente nas políticas educacionais do Brasil, nos últimos vinte anos. A dialética materialista foi utilizada como método de análise e a pesquisa bibliográfica e a análise documental, como técnicas de pesquisa. Constatamos com este estudo que o projeto de educação presente na legislação, remete-nos a um projeto neoliberal, que através das políticas educacionais aponta para a privatização da educação. Apesar de alguns documentos oficiais assinalarem a educação física como componente curricular de grande importância para a formação dos alunos, as políticas educacionais implementadas não garantem esta prerrogativa. A legislação vem fragilizando a permanência da educação física escolar no currículo da educação básica, com a reforma do ensino médio e a elaboração da BNCC.
Valores ético e estético do kung-fu: uma revisão sistemática
Authors: Mocarzel Rafael Carvalho da Silva , Queirós Paula , Lacerda Teresa Oliveira
Published: June 2020

O Kung-Fu é uma arte marcial chinesa milenar e mundialmente conhecido por seus princípios de ensino à ética e estética, destacando-se com uma profunda singularidade filosófica vertida em valores. Neste estudo qualitativo realizou-se uma revisão sistemática objetivando identificar a literatura sobre a importância da ética e da estética no contexto do valor educativo do Kung-Fu. Encontraram-se 36 artigos e quase todos abordam a ética e estética de maneira genérica e abstrata. Só quatro eram em língua portuguesa. Muitos citam a ética e estética como aspectos filosóficos históricos, mas não abordam essas temáticas quando adentram em competições desportivas.
A inconfidência e insubordinação de Tântalo e suas reverberações no corpo político
Authors: Borelli Sandro , Marques Flávia Brassarola Borsani , Roble Odilon José
Published: June 2020

Este artigo propõe relacionar a trajetória e tragédia do mito grego Tântalo às conjunturas históricas, ressaltando o papel de destaque do corpo na construção da sociedade. Se alimenta de referências filosóficas, principalmente de Friedrich Wilhelm, Nietzsche e de Arthur Schopenhauer e literárias de Franz Kafka e Augusto dos Anjos, para poder instaurar um olhar sobre o corpo enquanto instrumento reflexivo e, por conseguinte, refém das barbáries corporais e psicológicas na história.