bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic competition for hexon binding between core protein VII and lytic protein VI promotes adenovirus maturation and entry
Authors: Hernando-Pérez Mercedes , Martín-González Natalia , Pérez-Illana Marta , Suomalainen Maarit , Condezo Gabriela N. , Ostapchuk Philomena , Gallardo José , Menéndez Margarita , Greber Urs F. , Hearing Patrick , de Pablo Pedro J. , San Martín Carmen
Published: May 2020

Adenovirus minor coat protein VI contains a membrane-disrupting peptide that is inactive when VI is bound to hexon trimers. Protein VI must be released during entry to ensure endosome escape. Hexon:VI stoichiometry has been uncertain, and only fragments of VI have been identified in the virion structure. Recent findings suggest an unexpected relationship between VI and the major core protein, VII. According to the high-resolution structure of the mature virion, VI and VII may compete for the same binding site in hexon; and noninfectious human adenovirus type 5 particles assembled in the absence of VII (Ad5-VII-) are deficient in proteolytic maturation of protein VI and endosome escape. Here we show that Ad5-VII- particles are trapped in the endosome because they fail to increase VI exposure during entry. This failure was not due to increased particle stability, because capsid disruption happened at lower thermal or mechanical stress in Ad5-VII- compared to wild-type (Ad5-wt) particles. Cryoelectron microscopy difference maps indicated that VII can occupy the same binding pocket as VI in all hexon monomers, strongly arguing for binding competition. In the Ad5-VII- map, density corresponding to the immature amino-terminal region of VI indicates that in the absence of VII the lytic peptide is trapped inside the hexon cavity, and clarifies the hexon:VI stoichiometry conundrum. We propose a model where dynamic competition between proteins VI and VII for hexon binding facilitates the complete maturation of VI, and is responsible for releasing the lytic protein from the hexon cavity during entry and stepwise uncoating.
Studies on the mechanism of general anesthesia
Authors: Pavel Mahmud Arif , Petersen E. Nicholas , Wang Hao , Lerner Richard A. , Hansen Scott B.
Published: May 2020

Inhaled anesthetics are a chemically diverse collection of hydrophobic molecules that robustly activate TWIK-related K
+
channels (TREK-1) and reversibly induce loss of consciousness. For 100 y, anesthetics were speculated to target cellular membranes, yet no plausible mechanism emerged to explain a membrane effect on ion channels. Here we show that inhaled anesthetics (chloroform and isoflurane) activate TREK-1 through disruption of phospholipase D2 (PLD2) localization to lipid rafts and subsequent production of signaling lipid phosphatidic acid (PA). Catalytically dead PLD2 robustly blocks anesthetic TREK-1 currents in whole-cell patch-clamp recordings. Localization of PLD2 renders the TRAAK channel sensitive, a channel that is otherwise anesthetic insensitive. General anesthetics, such as chloroform, isoflurane, diethyl ether, xenon, and propofol, disrupt lipid rafts and activate PLD2. In the whole brain of flies, anesthesia disrupts rafts and PLD
null
flies resist anesthesia. Our results establish a membrane-mediated target of inhaled anesthesia and suggest PA helps set thresholds of anesthetic sensitivity in vivo.
Methodological issues in contrastive lexical bundle research
Authors: Pan Fan , Reppen Randi , Biber Douglas
Published: May 2020

This study explores the influence of corpus design when comparing lexical bundle use across groups, examining how the number of texts and average length of texts can impact conclusions about group differences. The study compares the use of lexical bundles by L1-English versus L2-English writers, based on analysis of two sub-corpora of academic articles that are matched for discipline, writer expertize, time of publication, and audience. However, the two sub-corpora differ with respect to the number of texts and the average length of texts. Three experiments examined the influence of differences in corpus composition. The results show that differences in the number of words and number of texts across sub-corpora can have a strong effect on claimed differences in bundle use across groups. This effect is found even when the texts in the corpora are closely matched for their register and topic.
Bound states in the continuum and exceptional points in dielectric waveguide equipped with a metal grating
Authors: Kikkawa Ryo , Nishida Munehiro , Kadoya Yutaka
Published: May 2020

Bound states in the continuum (BICs) and exceptional points (EPs) have been the subjects of recent intensive research as they exhibit exotic phenomena that are significant for both fundamental physics and practical applications. We investigated the emergence of the Friedrich–Wintgen (FW) type BIC and the EP in a dielectric waveguide comprising a metal grating, focusing on their dependence on the grating thickness. The BIC emerges at a branch near the anti-crossing formed of the two waveguide modes, for a grating of any thickness. With the grating-thickness change, the anti-crossing gap varies and the branch at which the BIC appears flips. We show that, when the slit is single mode, the BIC appears in the vicinity of the crossing between the two waveguide modes in the empty-lattice (zero slit-width) limit, while the results satisfy the criteria for the branch at which the BIC appears in the previous reports. In addition, we find that the EP appears near the BIC in the same device only on selecting the grating thickness. The BIC and EP in the dielectric waveguide comprising a metal grating, particularly with such tunability, are expected to result in the development of functional and high-performance photonic devices in addition to being a platform for the fundamental research of non-Hermitian systems.
Analyses of Battery Usage Characteristic in Electrical Car
Authors: Marniati Yessi , Suyadi Andri , Yani Herman , Marsus Sutan
Published: May 2020

The first battery is DMA 60B24R, the second battery is NS60 / 46B24R 370CCA and the third battery is 46B24R / NS 60. When emptying the battery for 6 hours, the current and voltage values of the battery quickly run during 6 hours of discharge, the first battery voltage, current 0, the second battery 6 hours there is no residual voltage, current. While what remains emptying with time for 6 hours is a third batteries with a voltage value of 2 Volts, 10 A current. When charging a battery with a time varies of 2 hours, 4 hours and 6 hours, the first battery for 6 hours voltage 14 Volts and current of 46 A. The second battery with a time of 6 hours voltage of 13 Volts, current 45 A. The fast charging battery is the third takes 4 hours of charging 13 Volts of voltage, current 45 A. The third battery is very good to use for electric cars because when emptying for 6 hours there is still voltage and residual current in the battery, when charging only takes 4 hours it will affect the travel time and mileage in accordance with the purpose when driving electric car.
Learning Module of Analog Electronics Practice
Authors: Rasyad Sabilal , Evelina  , Amperawan  , Permata Sari Dewi , Latifah Husni Nyayu
Published: May 2020

The function of transistors in analog and digital system is very important, therefore it is necessary to give more attention to their design problem. The power amplifier is designed and tested in class A and B. This research was done to complete the existing experimental equipment by knowing the magnitude of amplification and efficiency value. The result of this research both experiments and calculations for class A amplifier show a greater amplification with increasing value of load resistance. In class A power amplifier, the highest efficiency at 10 kΩ load resistance is 2.739%. In class B power amplifiers, the efficiency value still shows a fixed value of ± 78.6%. From the efficiency value, it shows that the percentage of class B amplifier is better compared to class A amplifier. The results of the amplification and efficiency of both class A and B amplifiers that were obtained from the experimental result of design of the practice learning module showed quite accurate results. This is marked by amplification and efficiency of < 8.33 % for class A (RC coupling) and for class B, the max efficiency is 78.6 %.
Analysis of a cans waste classification system based on the CMYK color model using different metric distances on the k-means method
Authors: Resti Yulia , Burlian F. , Yani Irsyadi , Rosiliani Dinda
Published: May 2020

This study aims to build and analyze a classification system of can waste based on Cyan, Magenta, Yellow, and Black (CMYK) digital image color model by implementing 3 different metric distances on the k-means method; Manhattan, Euclidean, and Minkowski. The classification results of experimental data note that the implementation of Euclidean distance on the k-means clustering method for classifying the cans waste into three can types has the highest accuracy, with a difference of not more than 1% from Minkowski distance and more than 19.6% from Manhattan distance. The simulation study of various size of generated data show that classification accuracy level using the three metric distances for both the lighting data have a rate less than 70%. The accuracy level of less than 70% in both experimental and simulation data, each of which implements three distances, can be said that this method is not appropriate for building a can classification system.
Implementation of Facial Feature Extraction Using Viola-Jones Method for Mobile Robot System
Authors: Zarkasi Ahmad , Nurmaini Siti , Setiawan Deris , Kuswandi Ahmad , Desy Siswanti Sri
Published: May 2020

To be able to detect faces, the system must be able to identify the characteristics of the face, so that the camera can distinguish which parts of the face and non-faces. In identifying facial features performed on certain parameters, such as skin color, facial contours, lighting, facial pose. At this time face detection system uses an algorithm Viola-Jones is considered the most accurate in the detection and face tracking. In this research, we will discuss the application of interactions between humans and machines with image media in the form of faces. Interactions between humans and computers can be found in various places. One of the media interaction between humans and computers is with the image. This time the system will indicate to find how r o bot can act through the position of a person’s face recorded on camera robot. This system uses the Viola-Jones algorithm method which is a fairly popular object detection method because the detection process is carried out very quickly. Besides, the bot will also follow the face based on the identity it stores in the database. In recognizing the human face this system uses the Eigenface method. Both of these algorithms will adjust the robot’s motion as it should. The results of the experiment will show the robot can move quite well following the face stored in the database.
Automatic Cooling of a PV System to Overcome Overheated PV Surface in Palembang
Authors: Taqwa Ahmad , Dewi Tresna , Kusumanto RD , Sitompul Carlos R , Rusdianasari
Published: May 2020

An automatic cooling for a PV panel is necessary to reduce the solar panel surface temperature and to avoid overheating that can lead to the destruction of a PV cell. The automatic design cooling is equipped with a thermostat as the temperature sensor. The automatic cooling consists of a thermostat, a microcontroller to regulate a pump and to flow water on the surface of the solar panel. The reference temperature is set to 36oC, and when the surface temperature exceeds the reference temperature, the pump will flow the water, and the heat is gradually reduced. The pump is off when the surface temperature is less than 36oC. The data application of automatic cooling was taken from 08.30 AM to 03.30 PM. The average power output for automatic cooling is 21.9 W, and the normally installed panel is 19.0 W. The difference in the average output power is 2.9 W. The panel with the automatic cooling system has higher efficiency (3.4%) compared to the normally installed panel (3.0%), with the difference of 0.4%. The application of automatic cooling is economically beneficial due to its output power and efficiency superior compare to the normally installed panel.
The Analysis of Wear on Artificial Hip Joint with Dimple on Femoral Surface
Authors: Satya Ramadhoni Tri , Syahrom A. , Putra Md Saad Amir , Prakoso A. T. , Wicaksono D. , Basri Hasan
Published: May 2020

This paper proposes the replacement of artificial hip joints which is one of the successful methods used to restore the movement of damaged hip bones. The main contribution of this work is to reduce wear caused by contact pressure between the femoral head and acetabular cup surfaces, where the average wear rate is very high. This can be achieved through the use of dimple on the femoral head surface from the artificial hip joint and subsequently computed by using the Archard equation. To validate the contact pressure accuracy of the proposed model, mesh sensitivity that used with 3 levels of mesh size are 1.2, 1.1 and 1.0. In this study for more accurate result, the mesh sensitivity used is with the mesh size of 1.0. The performance calculation results from wear are shown that in a hip joint using dimple the maximum contact pressure and the wear depth are decreased compared to the hip joint without dimple which are 67.25 MPa and 1.064 x10−10 mm from the previous value of 77.44 MPa and 1.185 x10−10 mm. Therefore, based on differences in the distribution of contact pressure that occurs shows volumetric wear on the hip joints using a dimple lower than without a dimple.
Optimal Design of Plasticizing Screw Using Artificial Intelligent Approach
Authors: Wang Min-Wen , Arifin Fatahul , Kuo Jhen-Wei , Dzwo Tzong-Horng
Published: May 2020

This study integrated plasticizing screw analysis software with neural-network in the design of a screw for injection molding application. The qualities of the plasticizing screw selected in this study are output rate, melt temperature variation at the end of metering zone, the specific mechanical energy (SME), and the melting distance. The Taguchi orthogonal array is implemented to carry out the experiment and to obtain the test data for training the neural network. The Back-propagation Neural Network (BPNN) was then used for screw quality predictor, and optimal design was solved with Genetic Algorithm (GA). The optimal screw design for a diameter of 25 mm screw for molding PC resin in this study is 5.37D in solid conveying zone, 9D in compression zone, metering zone depth of 2.44 mm, and flight width of 3 mm. The performance of this screw with the preset processing condition can have the temperature difference at the end of metering (ΔT) of 5.67°C, the output rate Q of 20.12 kg/h, the SME of 520.80 (kJ/kg), and the plastics completely melted at 17.39D.
Analysis of Upgrading Process of South Sumatera Low Rank Coal
Authors: Sipahutar Riman , Kusuma Pratiwi Diah , Darmawi  , Bizzy Irwin , Hidayati Baiti
Published: May 2020

This research aims to find a method of removing moisture of Indonesian low rank coal by using a combined equipment of evaporator and heater. The heating equipment was controlled at varied temperatures of 343 K, 353 K and 363 K. This method is expected to increase heating value and reduce moisture content of coal. Based on this study, the removal of moisture content of Indonesian low rank coals was affected by the heating temperature and particle size of coals. Ambient air was passed through the evaporator tubes to decrease the temperature until reaching the dew point temperature of the air and then through the heating elements of a heater before entering the fluidised bed of pulverized coal. The results of this research showed that the heating value of coal can be increased up to 35.4% and also the moisture content can be reduced up to 29.8%, both at heater temperature of 363 K and particle size of (-20 +40) mesh.
Simulation of the Effect of Cutting Angle in Lathe Process onDistribution of Cutting Temperature
Authors: Ismail T , Amrifan SM , Irsyadi Y , Riman S , Rahmad H
Published: May 2020

Lathe machining process (turning) is one of the metal cutting operation is the most widely used. At the time of the cutting process almost all cutting energy is converted into heat through friction between furious with the chisel and the chisel with the workpiece, as well as the destruction molekulen or atomic bonding in the field of shear (shear plane). The heat produced will be distributed in workpiece surface, chisel eye, and furious. High cutting temperatures as a result of friction between the eyes chisel and workpiece, will have an impact on the wear rate of the active surface of the plastic deformation chisel and chisel. Cutting temperature can be measured in various ways, either directly or indirectly. However, in its application, direct measurement will find it difficult to reach the area of the cutting temperature. The difficulty is due to the relatively narrow measurement range, disturbance of movements machinery and hindered by furious that formed during the machining process is done. To overcome this we can do indirectly measuring process for measuring the temperature of the cutting. Indirect measurement can be done by simulation or modelling. This research uses Tungsten carbide as a cutting tool and AISI 4340 as the workpiece in the simulation process. FEM-simulation software used in this research is SolidWorks 2014 and Abaqus / CAE 6:14. Simulations were performed to analyze the influence of the temperature distribution of the corner cutting that occurs during cutting.
Design of Automatic Control Systems at Loader Output of Snap Gauge Machine in Manufacturing Industry
Authors: Ardi Syahril , Faizal Zuhdi Rahardian
Published: May 2020

The process of making an engine valve is through a machining process in the machining area. One of the machines in the machining area is a snap gauge machine. This snap gauge machine is used for the engine valve dimension inspection process. In this snap gauge machine, there is a section called the output loader. The existing condition is the low height of the output loader. This causes the operator to bend when carrying out the engine valve. The impact is on the decline of operator morality, especially the enthusiasm and level of operator fatigue at work. Next, we design a mechanism to increase the output loader height so that the inner process runs automatically. The design of the Automatic Output Loader is to automatically increase the output loader’s height. In this Automatic Output Loader it will use PLC as a control, programmed according to the desired working system and use the pneumatic cylinder as an increase in the output loader height. The height of the previous loader was 40 cm, after making this tool it increased to 65 cm and the operator did not have to bend again as before.
Experimental Vibration Study in Milling Thin-Walled Ti6Al4V under MQL using Coconut Oil as Cutting Fluid
Authors: Yanis M , Mohruni A S , Sharif S , Yani I , Zahir M
Published: May 2020

In thin-walled Titanium Ti6Al4V machining, vibration is the dominant factor affecting the quality of components. Excessive vibrations can generate chatter, this condition occurs because it is not suitable in choosing machining parameters. Chatter is not expected because it causes dimensional errors, rapid tool wear and poor surface finish. This experiment tries to identify chatter-free conditions with the appropriate parameters. Uncoated carbide is used as a cutting tool with a diameter of 10 mm and machining under the MQL system with coconut oil as a cutting fluid. In the result of the milling showed if this machining is free of chatter, where from frequency was achieved is not equal to the natural frequency from simulation, then this is also approved from result surface roughness and surface photography. In surface roughness result, the value is smaller than minimum critical amplitude, where good result in high value of the cutting speed and small feed rate and result of the surface photography was identified no severe surface condition along thin-walled. The experiment also calculated for non-thin-walled Ti6Al4V as evaluation, where the result of both acceleration and surface roughness was obtained smaller than milling thin-walled.
Numerical and Experimental Analysis of a Drying Chamber of a Heat Pump Sludge Drying System
Authors: Luo Win-Jet , Wu Nai-Feng , Lin Cheng-Yan , Suhaeji Deri
Published: May 2020

This study proposed an improved design for the typical sludge drying system cooperating with three air-source heat pumps. Performance improvement of the system was conducted by consideration of the internal configuration of the drying chamber and the heat and mass transfer effect of the air in the cabin. Since the heat pump drying system in this study adopts the design of continuous sludge feed, the efficiency of heat and mass transfer between the sludge on the conveyor belt and thet air streams from the condenser in the drying chamber becomes very important. Simulation analysis of the computational fluid dynamics (CFD) software was used to understand the flow field and temperature field distributions in the drying chamber with air deflectors in order to find the appropriate internal configuration design in the drying chamber and system operating parameters. The SMER value (ratio of dehumidification amount and energy consumption) were measured to verify the system improvement effect. The purposed system can enhance the dehumidification SMER value by 32.44%. The simulation temperature differences and the actual measured results are less than 10%, the water content percentage of the discharged dry sludge decrease by 30% after redesign the cabin.
PLC Omron CJ1M CPU-21 Control Modification for Drill Oil Hole Machine in an Automotive Company
Authors: Prasetyani Lin , Ramadhan Bayu , Dewi Tresna , Sarfat William
Published: May 2020

Nowadays, PLC (Programmable Logic Control) is one of the common controlling devices in machines in the industry, including the automotive industry. An automotive company in Indonesia that produces component motorized vehicles in the form of pistons using machines that controlled by PLC. Piston is one of the main automotive components in motor vehicles that play a role in the combustion process. In the order of making piston there is a process of making oil holes which is carried out using a Drill Oil Hole (DOH) machine. This machine currently uses on / off operation mode use push-button. In addition, there is no interface to display information needed by machine and maintenance operators. There are some modifications that will be made to the drive section to synchronize between the engine and the robot. This paper presents a review of the modification of DOH engine controls using the CPU-21 CJ1M Omron PLC with an interface in the form of a Human Machine Interface (HMI) to provide information and set data needed.
Analysis Model for Orifice Flow Meter Correction Factor in Measuring in-Pipe Natural Gas Flow based on Numerical Simulation
Authors: Bunyamin  , Kaprawi  , Puspitasari Dewi , Sugianto  , Latifah Husni Nyayu
Published: May 2020

Orifice Flow meter (OFM) is widely used for measuring the flow in industry. However, in many cases, the measurement value of OFM some times will differ from the other meter, for instance Ultrasonic Meter (USM), that also measure the flow of the same pipe. The inaccuracy of the flow measurement using OFM can be caused by: i). the geometry of the OFM hole that experiences the shape changes due to abrasion or deformation as the result of the gas flow pressure on the inner surface of OFM metal holes; ii). the presence of a liquid fraction in the measurement of gas flow. To match the value measurement between the OFM and USM, a numerical simulation process of natural gas flow through OFM is needed. In this research, an analysis model for Orifice Flow Meter Correction Factor in Measuring in-Pipe Natural Gas Flow based on Numerical Simulation, is proposed. This model can be used to correct the error measurement of the OFM. The analysis process is conducted by analysing the Pearson correlation and testing the Kolmogorov-Smirnov data normalization on 9 populations of flow measurement data using OFM and USM. However, only 4 of the data that matches to the Pearson correlation criteria and the Kolmogorov-Smirnov normalization. Based on the 4 populations of data, a correction factor model was developed using a regression analysis consisting of two factors, namely OFM and USM correction factors that refer to the actual data from the measurement of gas flow rate. Based on variations in gauge pressure of 393.65 psig, 404.67 psig and 413.37 psig at a temperature of 80.710F and numerical simulation results in the form of different pressure and flow discharges, the resulting correction factors are in the form of 3rd degree polynomial equations.
Study of The Effect of Calcium Oxide (CaO) Catalyst Derived From Blood Clam (Anadara Granosa) And Reaction Time To Quality of Biodiesel From Waste Cooking Oil
Authors: Febriana Ida , Anerasari M , Ridwan KA , Jauhari Taufik
Published: May 2020

This study aims to determine the effect of CaO catalyst amount and reaction time to the quality of biodiesel produced. The CaO catalyst used was obtained from the shell of the blood clam by means of calcinations at temperature of 1000 °C for 5 hours, in order to activate the CaO compound in the shell of the blood clam. The transesterification process was carried out with 2 independent variables, namely the amount of catalyst and reaction time. Variations of catalyst were 0.5%, 1%, 1.5%, 2%, and 2.5% tothe weight of waste cooking oil, while the reaction times were varied in 60 minutes, 120 minutes and 210 minutes. The results of the research shown that the amount of catalyst and reaction time affected the quality of biodiesel produced.Theoptimum amount of catalyst was 2.5% of weight at120 minutes optimum reaction time yielded of 59.89%, with 0.868 gr/mLdensity, 5.65 cStviscosity, 0.458 mgKOH/gr acid value, 0.045% moisture content, 1780Cflash point, and 9557.78 cal / gr calorific value.
The Analysis of The Use Calcium Oxide (Anadara Granosa) and Sodium Hydroxide Catalyst Reviewed on Yield of Biodiesel
Authors: Effendy Sahrul , Tahdid  , Trisnaliani Lety , Putra Sandy A , Hefyani Alifah R
Published: May 2020

The energy crisis in Indonesia is caused by an increase in the need for fuel oil which has increased in the replacement of fossil energy reserves. It’s the time to dependency of the petroleum by developing an alternative energy sources that can be renewable. One of the way to overcome this matter is developing the fuel production such as biodiesel which is made by waste cooking oil. The level of FFA is contained the waste cooking oil is used below 5%, namely 1.945% so that the transesterification process can be directly carried out. This research was conducted to determine the effect and the type of catalysts concentration (NaOH and CaO), ((0.5-2.5%) with 3000 ml of waste cooking oil) on the quality of biodiesel. The results of the study shows the effect and the type of catalysts concentration is affected of the quality of biodiesel is produced. The optimum point is using of NaOH catalyst with the amount of catalyst 1% w/w waste cooking oil is yield 84.65%, density 0.8540 gr/ml, viscosity 5.65 cSt, acid number 0.447 mgKOH/gr, water content 0.048%, point flame 167°C, and calorific value 9757.7096 cal/gr, these values have fulfilled the biodiesel quality standards in accordance with SNI-04-7182-2015. while the optimum point is used of CaO catalyst and the amount of catalyst is 2.5% w/w waste cooking oil is yield 58.57%, density 0.8740 gr / ml, viscosity 5.66 cSt, acid number 0.447 mgKOH / gr, water content 0.040 %, flash point 179.6°C, and heating value 9543.5214 cal/gr.
Prototype of Tray Dryer Unit for Silica Gel Drying Based on Bagasse
Authors: Yuliati Selastia , Fadarina  , Zamhari Mustain , Hajar Ibnu
Published: May 2020

Tray dryer is one type of plate-shaped dryer, which is often used to dry materials in the form of solid or paste, therefore the tool is very suitable for drying or converting hydrogel to silica. The working principle of the dryer is to transfer heat around the environment of the material to be dried by means of heat transfer by convection and conduction. Weight reduction due to water loss due to evaporation when drying process is done. In this research, the silica to be dried was made from bagasse using a number of additional ingredients namely hydrochloric acid and sodium hydroxide with various variations. Tool performance is determined based on the amount of thermal efficiency obtained where thermal efficiency is a percentage of the amount of heat flowing during the drying process. In addition, the rate and time of drying will also affect the quality of the product. research steps include; tool design using the functional approach method to find out the functions of the unit of equipment used and structural approach to get the dimensions of the tool Silica gel produced from the drying process is analyzed using X-Ray Difraction (XRD) and Fourier Transform Infra Red (FTIR) which aims to characterize the crystal structure and detect functional groups. Based on the analysis results obtained silica gel has a functional group of Si-OH and amorphous crystal structure, so it is categorized as meeting the standards of JIS-0701. Calculation results obtained optimal conditions achieved at the time and speed of drying 360 minutes, 0.019 kg / hour m2 with a silica gel moisture content of 0.81% and thermal efficiency of 86.4%.
Distillation of Patchouli Oil Using Firewood and Liquefied Petroleum Gas as Fuel : Effects of Yield, Quality and Cost Analyses
Authors: Mahlinda  , Dani Supardan M.
Published: May 2020

This research aimed to examine the distillation of patchouli oil using firewood (FW) and Liquefied Petroleum Gas (LPG) as fuel. The effects of yield, patchouli oil quality and cost analyses had been observed. The results showed that distillation of patchouli oil using FW obtained a higher yield than LPG. Physical-chemical properties test (color, specific gravity, refractive index and optical rotation) showed no significant difference of value and still met the requirements parameters in SNI 06-2385-2006. Meanwhile, chemical component analysis by GC-MS showed that the patchouli alcohol using FW and LPG has not met the requirement parameters in SNI. Cost analysis indicated that the distillation of patchouli oil using LPG was not profitable because of higher cost and lower yield than FW.
Re-Design Pyrolysis Reactor Prototype for the Conversion of Plastic Waste into Liquid Fuel
Authors: Aswan Arizal , Rusnadi Irawan , Fatria  , Zurohaina  , Daniar Rima
Published: May 2020

In this research, a pyrolysis reactor with a capacity of 5 kg has been designed. Innovation in the pyrolysis reactor is the adsorbents that are used (lime CaCO3 + iron fiber Fe2O3) in the reactor. This study aims to determine the optimal reaction conditions. Tests carried out at 200-400°C temperature intervals and a range of 40-90 minutes. The best product is 86.40% liquid yield at 350°C with a processing time of 90 minutes. ASTM distillation studies of the oil produced showed that 67% fraction was in the range of the light naphtha, 12% fraction was in the range of heavy naphtha and 21% fraction was in the range of the medium naphtha. Comparing the physical parameters of the sample oil with standard fuels, it was observed that the fractions collected were in the range of gasoline, kerosene and diesel oil. This research contributes significantly to increasing knowledge about the feasibility of pyrolysis, providing opportunities for the recycling sector to spread take-off systems, in the Circular Economy.
Marketing Efficiency Of Organic Rice In Lampung Province
Authors: Irfan Affandi Muhammad , Handayani Sri
Published: May 2020

The problems that often occur in marketing organic rice is marketing channels have not been efficient. The purpose in this research was to identify the marketing channels of organic rice and analyze marketing efficiency of organic rice in Lampung Province. The location of the study was conducted purposive in organic rice producing districts, namely Pringsewu and South Lampung Regency. The research method uses descriptive methods. Data analysis uses qualitative and quantitative analysis (marketing margin and farmer’s share). Total respondents were 20 producer farmers, farmer groups, 2 village collecting traders, and 1 retailer. The results showed that there were 3 types of marketing channels, namely channel I (farmers - traders - consumers), channel II (farmers - farmer groups - retail - consumers), and channel III (farmers - tengkulak - consumers). In terms of the economics of marketing channels organic rice II is more efficient than marketing channels I and III. The market channel II has the highest farmer’s share value of 80.95% with the lowest margin of IDR.4,000 per kg.
The simple design of pyrolysis tool for making liquid smoke from shells and rubber seeds as a food preservative
Authors: Ali Farida , Al Fiqri Roval
Published: May 2020

This paper presents a simple design of the pyrolysis tool for making liquid smoke from shells and rubber seeds as a food preservative. Herein, one may use any raw material, such as organic materials that contain cellulose for making liquid smoke. Although there have been many similar studies conducted, nevertheless none of this study using shells and rubber seeds as raw materials to make liquid smoke been done before. The research method was pyrolisis using shell and rubber seeds on a temperature of 400° C for four hours. The purification of liquid smoke is by filter paper and distilled at 200° C temperature. There is a various concentration of %, 8%, and 10% when the dilution of liquid smoke obtained from distillation applied to Nile tilapia. Even so, the best results from this study were at a concentration of 6% for 7 hours with a final total plate number of 3 x 102 CFU/g and a pH value of 6.
Performance analysis of Patal – Pusri Intersection after underpass operated
Authors: Hasan A. , Adrian R. , Syamanda D. , Budi D. , Mirza A. , Indrayani
Published: May 2020

The high level of population growth can have an impact on increasing traffic growth, especially at intersection points. One of the intersections in Palembang is the Patal-Pusri intersection which has been equipped with an underpass to overcome the level of congestion that occurs at the intersection. The purpose of this study was to analyze the performance of the Patal-Pusri intersection after the underpass was operation. The analyze was conducted by calculating the cycle time, capacity and level of service the existing traffic flow and do an evaluation the comparison of the level of service at the beginning of the underpass operation in 2015 with current conditions. the traffic survey was conducted at 3 busy times, namely 06.00 - 08.00 WIB, 11.00 - 13.00 WIB and 16.00 - 18.00 WIB. Data were analyzed using the guidelines for the Indonesian Signalized Intersection Road Capacity Manual (1997). The results of the calculation of the cycle time obtained by 141 seconds, the intersection capacity of 3390 pcu/hour and the largest volume of traffic flow is 3142 pcu/hour. Analysis level of service of 0.909 (Level E) which means very bad. Whereas level of service at the beginning of the underpass operation was at level A which means very good, this shows that occurrence the decline in level of service from level A to level E within 4 years.
Design of Corn Thresher
Authors: Basuki M , Aprilyanti S , Azhari  , Madagaskar
Published: May 2020

Corn is one of the agricultural products that has a lot of benefits, such as a staple food, vegetable oil, fodder, various snacks, and cornflour. The background of this research is the ineffectiveness of corn farmers in threshing corn seeds caused in the processing is still done manually. The purpose of this research was to obtain a design and threshing tool for corn seed that fit consumer needs. The results of this research are obtained dimensions of the corn thresher size tool with a height of 85 cm, a length of 50 cm and a width of 30 cm. To be adaptable environmental and not noisy, this corn thresher uses a 2800 rpm electric motor, so from the results of testing the corn thresher tool has a production capacity of 150 kg/hour. One of the advantages of this corn thresher, corn does not scatter because it is made the funnel, and the price under 1.5 million rupiahs.
Effect of bulk density, age, and water content on the erosional strength of streambank soils
Authors: Sutarto T E
Published: May 2020

The purpose of this study is to investigate the influence of physical properties, more specifically the bulk density and water content, to the erosional strength of streambank soils. Thirty (30) soil samples were extracted from the crest, midbank and toe of the bank at Clear Creek in Iowa City, Iowa. Out of those thirty (30) samples, six (6) samples were tested in the standard soil laboratory for obtaining their bulk density and particle size distribution, six (6) samples were tested their bulk density and heterogeneity using Gamma radiation scanning, and eighteen (18) samples were tested their erosional strengthr*f. In addition, six (6) pure Kaolinite-clay samples were constructed with various degrees of consolidation or age and water content for measuring their
T>-:f using conduit flume technique. The results of the conduit flume tests revealed an increasing trend in magnitude of Hf moving from the crest to the toe of the bank. The
T<--t values were 1.57, 1.53, and 1.92 Pa for the crest, midbank, and toe soils from the left bank. In similar order, the
Tc.f values were 1.46, 1.47, and 1.83 Pa for the soils from the right bank. A similar trend was obtained for the bulk density based on standard laboratory test and gamma radiation scanning. According to standard laboratory test, the average bulk density values for the crest, midbank, and toe of the right bank were 1299, 1618, and 1880 kg/m3. Similarly, based on gamma radiation technique, the average bulk density values for the crest, midbank, and toe of the right bank soils were 1273 kg/m3, 1594 kg/m3 and 1863 kg/m3, respectively. This agreement in the trend of
Tr-f and bulk density suggests a positive correlation between those to parameters. The results of Kaolinite-clay sample experiments demonstrated that samples with higher degree of consolidation or more age would have higher ^V. In addition, the Kaolinite-clay samples with higher water content would have lower
rct. These findings suggest the presence of spatial and temporal variability in
Ta of streambank soils. Therefore, incorporating this
Tc,i variability in modelling streambank erosion will give more accurate results.
The Copper Fiber On Compressive Strength And Elastic Modulus On Concrete Fc’25
Authors: Suhirkam Djaka , Hidayat Fuady B , Flaviana Lina , Suhadi
Published: May 2020

Concrete is produced from several materials which are mixed into one unit so it becomes like a stone. Concrete mixture consists of cement, coarse aggregate, fine aggregate, water and added or not additives. Cement as a binder when mixed with water will occur chemical reactions so that the hardening process occurs, while the aggregate serves as a filler for concrete. The use of concrete as a building material is now increasingly widespread, this shows the growing need for concrete, thus encouraging to create information about concrete mixtures. One of the innovations is the addition of copper fiber as a partial replacement for coarse aggregate in the concrete mixture. From the results of the study after the addition of copper fiber there was an increase in concrete compressive strength, elastic modulus and concrete tensile strength. The maximum increase occurs in concrete with the addition of 1% copper fiber of 0.14% of normal concrete. Concrete compressive strength value with the addition of copper fiber 0% (normal) of 27.20 MPa, adding 0.8% of 28.73 MPa, adding 1% of 31.03 MPa, adding 1.2% of 26.18 MPa. Splitting tensile strength for the addition of 0% copper fiber by 2.55 MPa, 0.8% addition by 3.42 MPa, 1% addition by 3.54 MPa and 1.2% addition by 2.41 MPa. While the elastic modulus value with the addition of copper fiber is 0% for 24512 MPa, adding 0.8% by 25192 MPa, adding 1% by 26181 MPa and adding 1.2% by 24048 MPa.
Serious Game Supply Chain Management Agribusiness as a Production Planning using Cournot Model
Authors: Bukhori Saiful
Published: May 2020

An agro-industry must have a competitor, to maintain its business is needed a strategy to compete with competitors. Competition can be done if they have information on the number of products and prices set in the market. This research develops serious game SCM agribusiness as production planning using cournot model. SCM concept is an important part of modern management. SCM concept consists of collaborative, planning, forecasting and replenishment. By using Serious Game Supply Chain Management Agribusiness as a Production Planning using Cournot Model, agroindustry will maximize profit when Marginal Revenue (MR) is equal to Marginal Cost (MC), in the short time the agroindustry will get economic profit greatest.
How Electronic Word Of Mount (E-Wom) Affects Purchase Intention With Brand Image As A Mediation Variable : Case Of Xiaomi Smartphone In Student
Authors: Roli Ilhamsyah Putra Teuku , Ridwan  , Kalvin Muhammad
Published: May 2020

This study aims to examine how the electronic word of mouth (e-wom) affects the purchase intention with brand image as a mediation variable. The determination of the object is carried out by proposive sampling, which takes the sample of the students of the Syiah Kuala university. There are 96 main field trials that are feasible to be sampled. The technique of data collection is done by questionnaire. The questionnaire is used to collect the data and it is analyzed by spss. The result shows that e-wom has a positive effect on purchase intention of Xioami Smartphone by students, e-wom has a positive effect on brand image, and brand image has positive effect on purchase intention, and also the brand image partially mediates e-wom to purchase intention. This can be the basics analysis for both academic practical and persons. For academic, this contributes for the further research that this model can be develop for the new ones. The originality in this study lies in the object and timeline, and also at the analysis that uses the path method. This conclusions also make the practical persons know how to manage the variables some students are interested in Xiaomi smartphones with varied variations and this is a good value and can be maintained by the company. The limitation of this research is only in using the three variables, so this can be developed by other researchers to build the new models.
The Pattern of The Marketing Ground Coffee Beans Using Decision Support System
Authors: Darudiato Suparto , Eliando
Published: May 2020

All art the determination of the decision that accurate main factor of the success of a company. Out because of the multitude of factors affect the quality of by decision makers such as the location of certain market. The marketing group calls for a device that could analyze a variety of factors that determine a candidate the location of marketing. Moreover, a model that is written is provided by way of field research and literature studies. The support system decision designed includes storage all the information is a factor in the determination of allocations marketing. The system made analyzed the information obtained based on mode. Finally, this system be able to display recommendations about such things as decisions on the basis of the certain analysis results.
The Evaluation of Semantic Mapping
Authors: Wardani Dewi
Published: May 2020

The increasing of the importance of links in the network of data influences the idea that links should be considered more in the mapping relational to graph model. Semantic abstraction gaps often occur during the mapping process where the link in the real world is mapped as a node in a graph model. This paper focused on evaluating the result of mapping and converting without losing the semantics. We propose the evaluation of our approach by using schema.org as the semantic standard. The experiments in three data sets show that the semantic mapping approach is pretty effective. We obtain quite good score matching without considering the gap index (the average is 0.6922) and with considering the gap index (the average is 0.5264) and the average precision score, 0.7042, is pretty good too.
Garbage Collector Robot (Gacobot) Design For Dry Waste Distribution
Authors: Prasetyo Aditya P. P. , Rendyansyah  , Desy Siswanti Sri , Nurmaini Siti , Abdurahman
Published: May 2020

GACOBOT is a garbage collection robot that is an integration of mobile robot systems and non-mobile robots, namely mobile robots like-a-car robot systems and robotic manipulators as garbage grabber systems. The GACOBOT system also integrates ultrasonic sensors and navigation systems as GACOBOT support systems, the garbage collection process has succeeded in the type of egg waste and bottle junk. The garbage collection process by conditioning the front ultrasonic sensor, then the grabber adjusts the trash and puts it into a garbage container while the robot is mounted by the robot. GACOBOT has been able to take garbage with iterations 40 times with 2 forms of garbage.
Pull-down Fitness Technique Analysis using Motion Capture
Authors: Passarella R , Nugroho A S , Arsyad F N
Published: May 2020

Exercise is an essential contributor to physical and psychological well-being. Regular exercise reduces many chronic diseases, such as heart diseases, diabetes, hypertension, obesity, etc. Pull-down is one of the Weight Training exercises. Engaging in physical activities such as Weight training, stretching exercises and aerobic exercises requires proper execution and awareness of the exercises to avoid bodily injuries and get maximal results. In this study, software that can analyse technique exercise of Pull-down. As research material, because of a degree, each human elbow is different, distribution data of Trainer elbow degree is calculated using measure standard deviation and displayed as a normal distribution graph. The method used in this study to analyse proper Pull-down exercise technique is compared to elbow angle Trainee with elbow angle Trainer. The output of this software is elbow angle, the correctness of the methods performed by the Trainee. The average percentage of accuracy from the results of testing the analysis software using the value of the angle of 56.87 ° ± 7 ° Trainer is 88%.
Prototype Design of CO2, CH4 and SO2 Toxic Gas Detectors in the Room Using Microcontroller-Based Fuzzy Logic
Authors: Widodo Slamet , Miftakhul Amin M. , Supani Ahyar , Silvia Handayani Ade
Published: May 2020

This study discusses how to design a prototype of a CO2, CH4 and SO2 gas detector in the room using three MQ135, MQ136 and MQ7 gas sensors. CO2, CH4 and SO2 gases are types of gases that are categorized as dangerous to humans if they are often exposed directly and have an impact on the health of the person and can cause death if they are too often exposed to these three gases. CO2, CH4 and SO2 are generated from gases coming out of a vacuum, a volcanic area containing sulfur sulfur levels. The human health impacts exposed cause acute respiratory problems. The research made prototype of CO2, CH4 and S02 toxin detectors equipped with three sensors. This device developed a sensor that is used to detect gas in closed air using a gas sensor by adding a gas pollutant suction system to the three sensors of various types based on the level of gas sensitivity. The results of testing the CO2, CH4 and SO2 gas gauges using the fire extinguisher test, residual manure, peat and sulfur powder using sensors MQ 135, MQ 136 and MQ2 with fuzzy rule base logic for motor speed produce levels of gas content close to hazardous, hazardous, very dangerous fund man., DC Fan motor speed output as a neutralizing room conditions approaching the danger level of the fan will automatically rotate to suck the gas content in it, the more dangerous the gas content in the room, the faster the DC fan motor speed will be to neutralize the gas inside.Keywords: