bluuebunny/crossref_metadata_2025 huggingface dataset:
Optical spectra of periodically patterned dielectric surface simulated by finite-different time-domain method
Authors: Sitpathom N , Dawes J M , Muangnapoh T , Kumnorkaew P , Suwana S , Sinsarp A , Osotchan T
Published: December 2019

A dielectric film imprinted with a hexagonal periodical pattern of nanosphere holes can be fabricated by a two-step process of depositing a dielectric thin film on a hexagonally patterned array of nanospheres fabricated by convective deposition, and then removing the nanosphere particles. In this work, the optical transmission through a dielectric slab with hexagonal pattern of half-sphere holes was simulated by finite-different time-domain (FDTD) methods. In the simulation, a short gaussian pulse of electromagnetic waves was generated and propagated through the dielectric patterned slab and the near-field diffraction from the structure was collected as a function of time. Using a Fourier transformation, the optical spectra of the structure were evaluated. The far-field diffraction was also investigated by evaluating the analytical Green’s function at given points. Several parameters of the optical response including full width at half maximum and relative intensities of high order diffraction peaks were examined for various structure sizes. The structures examined were composed of a periodic hexagonal pattern of half nanosphere holes (radius of 290 nm). In addition, the effect on the optical response of 10% elliptical shape deformation of the half-sphere holes was studied. Our calculations enable us to identify parameter schemes where the third order diffraction exceeds second order diffraction efficiency from gratings.
Simulation of square-frame dipole coils for steering of electron beam
Authors: Kongmali K , Rimjaem S
Published: December 2019

This study focuses on magnetic field simulation of a square-frame steering magnet and electron beam dynamic simulations in its magnet’s field at the PBP-CMU Electron Linac Laboratory, Chiang Mai University. The small dipole magnets with the same design were constructed from four identical iron bars winding with 70 turns of copper-wire. They are used for steering electron beam with a maximum kinetic energy of about 2.0 MeV in the pre-injectors system of the electron accelerator. The magnetic field simulations were conducted by using computer programs POISSON and RADIA for two-dimensional and three-dimensional models, respectively. The maximum magnetic fields at an excitation current of 1 A were 44.30 and 57.32 Gauss for the 2D and 3D models, respectively. The magnetic effective length was 10.45 cm. The electron beam dynamic simulations in the 3D magnetic field map was performed by utilizing a computer program ASTRA to investigate the transverse electron beam distribution along the magnetic axis. The achievement of this study will be used as an important information for proper operation of the magnets at our facility.
Charged fermion in two-dimensional curved spaces of constant Gaussian curvature with constant magnetic flux
Authors: Rojjanason Trithos
Published: December 2019

We investigate the behavior of spin-1/2 particles (electron and positron) confined to the Gaussian curvature surfaces. For the non-negative Gaussian curvatures, we present the preliminary results in cylindrical and spherical cases. To be specific we use the deformed hyperbolic solutions to obtain eigenvalues of the Dirac equation in the presence of an axial gauge field. Our results demonstrate the quantized energy and eigenstates of fermion. The quantization of energy depends on the spin-orbit coupling and the Landau quantization. The imaginary energy is obtained from the negative Gaussian curvatures. It is interpreted as the quasi normal mode (QNM). The angular momentum of fermion is shifted by addition of the constant magnetic flux. The fermion behaves like boson when the flux is half-integer.
Influence of local rice husks ash on compressive strength of normal-strength concrete
Authors: Fanggi B A L , Moata M , Mata A , Liem F , Woenlele T , Ndun S , Lada J
Published: December 2019

It is well known that rice husks ash can be used as cementitous material. However, different climate and geographical conditions could provide different quality of the ash. Therefore, this study aimed to investigate the effect of different percentage of rice husk ash (RHA) taken from Oesao village in Nusa Tenggara Timur-Indonesia on compressive strength of normal-strength concrete. Eight specimens with diameter of 150 mm and height of 300 mm made of normal-strength concrete with replacement of .0%, 5.0%, 10%, 15% of Portland cement with RHA were cast, prepared, and tested until failure. It is found that the maximum strength was observed on specimen with replacement of 10% of the ash.
Analysis of horizontal deviation values on shearwalls in building structure according to earthquake load design
Authors: Walujodjati E , Roestaman R , Farida I , Agesti M A
Published: December 2019

Technoplex Living Apartment Bandung is one of the buildings using a shear wall that is built in earthquake-prone areas. This study analyzes the CW3 shear wall Type which aims to determine the seismic load design using spectrum response analysis that is applied and analyzed on the structure of the building so that the horizontal deviation value that will be compared against the value of horizontal deviation that is permitted under SNI 1726 of 2012 is obtained. The results of this study can be concluded that the CW3 shear wall produces the highest horizontal deviation value in the direction of X of 0.032 m greater than the highest horizontal deviation value in the direction Y of 0.0042 m. Because it was analyzed in one direction, namely the X direction with the percentage of earthquake loads received using orthogonal systems where the X direction building structure received an earthquake load of 100% while Y direction was 30% of the earthquake load as a result of the spectrum response analysis method and the resulting horizontal deviation value was below the allowable safety margin, the percentage of X direction is 56.7% while Y direction is 92.3%.
Study of PVD effect on modulus of subgrade reaction
Authors: Zhafirah A , Somantri A K , Permana S , Roestaman R
Published: December 2019

The basic strength parameter that is important for use in designing pavement is the modulus of subgrade reaction (k). Increase in k-value can be obtained by soil improvement using preloading and PVD (Prefabricated Vertical Drain). The method that can be used to get the k-value is the plate load test using plates with a diameter of 304.8 mm in soil conditions without PVD and with PVD with a distance of 100 mm and 150 mm. The results obtained from the plate load test are settlement and pressure and then graphed. The k value is based on a pressure of 69 kN/m2 which determines a certain settlement. The most significant increase in the modulus of the subgrade reaction is that the soil mounted by PVD is 100 mm apart, an increase of 80.73%. Whereas for the soil installed PVD 150 mm increases by 56.24%. Based on this, soil with PVD with a closer distance gives a more significant increase in modulus of subgrade reaction.
Factors that affect the low quality of school buildings
Authors: Johari G J , Farida I , Permana S , Yogaswara D
Published: December 2019

School buildings have an important role in education. The problem that occurs is the low quality in rehabilitation. A quality control system is needed that can guarantee the quality of the building in accordance with the expected results. The purpose of this study was to identify what factors caused low quality in the rehabilitation of school buildings in Garut district. This study uses a quantitative approach to survey methods. The population and sample were 4,134 secondary schools that experienced rehabilitation in 2018 with a sample of 94 schools. The statistical analysis used was a confirmatory factor analysis. The results of this study are 13 variables that affect the low quality in the rehabilitation of school buildings in Garut Regency which are incorporated into 2 factors, namely project planning and implementation/project implementation. One dominant factor was obtained, namely the organizing factor for the implementation of activities. The indicators are division of tasks, time, capacity, and manner of implementation, estimated number of resources needed, Allocation of available resources, Ease of communication between the elements involved, Allocation of responsibilities for project implementation, Coordination of all activities and labor involved, Allocation of responsibilities for project implementation, Coordination of all activities and labor involved.
Confinement influence in cracking areas single reinforced concrete
Authors: Walujodjati E , Johari G J , Farida I
Published: December 2019

The combination of concrete and reinforcement in collaboration with the load is determined by the perfect bond of the two materials. The axial load is given in reinforced concrete results in internal cracking of reinforced concrete around the threaded reinforcement area. An area within the radius of cracking of the concrete around the reinforcement has also been obtained. The action is needed to reduce the area of cracked concrete by giving restraints using spherical spiral reinforcements within the concrete crack radius. It is expected to increase the strength of the reinforcement and concrete around it. The methodology used is Pull Out on single reinforced concrete cylindrical specimens with confinement and without confinement. Concrete cylindrical test specimens with a diameter of 150 mm 200 mm high with single reinforcement with a diameter of 10 mm, and spiral reinforcement as confinement with an identification diameter of 4 mm. Placed within the radius of cracking of the concrete around the reinforcement. The Pull Out test results indicate a cesarean movement from the edge that is loaded to the free end. The restrained specimen produces a larger cesarean at the end of the load, when the initial cesarean occurs at the free end.
Revenue components of road construction operations based on economic feasibility analysis
Authors: Farida I , Anasarida A A , Susetyaningsih A , Kurniawati R
Published: December 2019

Regional development is closely related to the provision of infrastructure, namely the road network with the hope of creating a positive impact. Roads as a means of connecting, open access, play a role in the smooth movement of people and goods and have the potential to increase economic activity. The purpose of this study is to analyze the economic feasibility of road construction. The method used refers to Pd.T-15-2005-B. Components analyzed the economic feasibility aspects of road construction are based on differences in vehicle operating costs and time values arising from differences in transportation costs on the new road and existing road. The results of the study took the form of specific recommendations and were a solution to the need for work to be carried out by examining the extent to which the level of feasibility, especially from the economic and financial aspects. The economic indicators used are Net Present Value, Internal Rate of Return, and Benefit-Cost Ratio. The indicator provides a scale that compares the benefits and costs of each alternative proposed, specifically each indicator has different characteristics. In general, all of these indicators need to be examined to more clearly describe economic events during the planning period.
The spatial structures and transportation infrastructure development in Banda Aceh City with TOD
Authors: Fadhly N
Published: December 2019

The spatial structure and construction of transport infrastructure in the city of Banda Aceh, in accordance with the strategy for developing the Banda Aceh City Spatial Plan (RTRW) 2009-2029 which combines the development of “multi-canter” and “linear-growth”. This has an impact on the inefficient development of transportation infrastructure with an increase in the number of vehicles 6% per year. The concept of TOD can eliminate urban sprawl, which turns urban sprawl into a compact city area. The method used is path analysis with, travel distance (X1), the purpose of the trip (X2), travel cost (X3) so that the equation can be obtained: Spatial Structure = 0.520 + 0.206X1 + 0,264X2 + 0,100X1, the relationship with infrastructure development transportation consists from variables, diversity of public/social facilities (X1), travel frequency (X2), the purpose of the trip(X3), travel costs (X4) and travel time (X5), so that the equation is obtained, Transportation Infrastructure Development = -1,457 + 0,652X1 + 0,388X2 + 0,235X3 + 0,222X4 + 0,327X5, from the model obtained, it can be concluded that the development of transportation infrastructure with the concept of TOD is strongly influenced by the spatial structure.
Traffic management of intersection with more than four road segments
Authors: Malia R , Fadhly N , Sugiarto S
Published: December 2019

Simpang Tujuh Ulee Kareng is one of the intersection that are crowded by local people who always doing movement in this area. The method of this research to calculated level of service this intersection by using SIDRA Intersection as a software, then it will merger of intersection be four road segments. The result and discussion of this intersection for existing condition based on Degree of Saturation (DS) for JD’s street is F. DS for TICI’s street is A. DS for LG’s street is A, DS for LR’s street is B, DS for MT’s street is A, DS for KR’s street is C, and DS for TIBPKP’s street is D. After the geometric merger into four road segments in unsignalized condition, DS for JD’s street and TIBPKP’s street is E, DS for TICI’s street is A, DS for LG’s street and LR’s street is F, and DS for MT’s street and KR’s street is F. For signalized condition, DS for JD’s street merger with TIBPKP’s street is E, DS for TICI’s street is E, DS for LG’s street merger with LR’s street is E, and DS for MT’s street merger with KR’s street is F.
The potential of problems on operational Go-Jek and Grab Bike
Authors: Purnawan P , Musliadi M
Published: December 2019

Go-Jek and Grab is one of transport mode that popular within society. They have the system that supports efficiency of their services. Although there are benefit for user and operator, but their operation is often creating problems to the users. In some cases, it is also creating problem in the environment. The purpose of research is to identify the potential of problems on operational Go-Jek and Grab Bike based on analysis operational performance and the operational system. This research was conducted based on qualitative analysis methods, the data was obtained using in deep interview to the drivers, potential problem on operational Go-Jek and Grab Bike was determined based on Logical Framework Analysis (LFA) method. The result shows that operational Go-Jek and Grab Bike has potential of problems in future on drivers, users, company, government and services.
Designing pressure build-up test on heavy oil well by alternating oil viscosity
Authors: Fathaddin M T , Oetomo R H K , Hisanah N
Published: December 2019

Pressure Build Up analyses on a heavy oil well would give an inconclusive result on pressure derivative curves. Some kind of thermal injection should be performed prior to implementing the operation of Pressure Build Up test, where the heat will lower the viscosity of the reservoir fluid. The study was aimed to design a proper well test for N-7 Well using a simulator. Since the Pressure Build Up test was intended to reach radial flow period within shut in time of 100 hours, the viscosity of fluid should be reduced to 24.8 cp or less. Sensitivity of several parameters namely viscosity, permeability, porosity, and shut-in time was conducted in designing Pressure Build Up test. This sensitivity would give various radius of investigation. Furthermore, the study was continued to correlate radius of investigation as a function of the parameters mentioned above.
Flexural strength of precast reinforced concrete beam extension
Authors: Sambowo K A , Prihantono P , Sumarsono R A , Kusumawardhana P , Widiasanti I
Published: December 2019

This paper presents the performance analysis of the precast reinforced concrete beam extension, in order to solve the problem of constructing a long and big concrete beam. This beam size problem is one of the challenging problem in terms of setting it in the construction site. We discuss the flexural strength analysis for a joint mechanism in the middle of the beam element in order to ease the installation. The aim of the experiment is to evaluate the flexural strength on the concrete beam. Testing is conducted based on the ASTM C 78 standard, which is the concrete flexural strength test with two exposures due to the existence of a support which exist at the 1/3 of the area (third point loading). In this research we conduct experiment on a total of three samples. The first sample is a full beam with the size of 3000 mm x 250 mm x 350 mm. The second one is the beam with the concrete hollow by the size of 1300 mm x 250 mm x 350 mm. The third one is a beam with the steel sheet extension by the size of 1400 mm x 250 mm x 350 mm. The test result of the three samples shows that the maximum load which can be supported by the full beam is higher compared to other samples. Moreover, the maximum flexural strength which can be supported by the beam with the concrete hollow tube is lower compared to the beam with a steel sheet extension. The fracture pattern behaviour of the middle extension of the concrete beams can be identified.
Production capacity and raw material storage capacity in agriculture-based industries
Authors: Mauluddin Y , Ikhwana A , Cahyadi U , Sudarwanto M
Published: December 2019

The purpose of this study is to find production capacity and storage capacity of raw material warehouses in agriculture-based industries. It is a concern; the supply of raw materials can only be done during the harvest period while production must continue throughout the year. This case occurs in the coffee processing industry, where the supply of raw materials for the harvest period is from April to August while production must be carried out every day throughout the year. To model, the problem is used by simulation using deterministic variables. Various capacity scenarios are tested to see system performance. The results that industries with raw materials from agriculture must prepare a very large raw material storage capacity.
Supply chain support factors for brown sugar business optimality using analytical hierarchy process
Authors: Ikhwana A , Mauluddin Y , Hayat E J , Taptajani D S , Suandi M I
Published: December 2019

The sustainability of business activity is determined by the existence of all elements involved in business activity. Alignment of each component included in business activities can be determined by identifying supporting factors based on movements in each business chain that occurs. This study aims to determine the supporting factors for the optimality of supply chain performance of brown sugar business activities using the supply chain management approach and supported by the analytical hierarchy process method in determining criteria that support brown sugar business activities. Based on the results of research on the supply chain of brown sugar business activities, to promote the sustainability and optimality of supply chain performance the brown sugar business on the elements involved in the brown sugar business consists of several factors including product quality, the cost of purchasing brown sugar raw materials, and accuracy and the suitability of the number of shipments that are in accordance with the request.
Product quality control based on lean manufacturing and root cause analysis methods
Authors: Sulistiyowati W , Adamy M R , Jakaria R B
Published: December 2019

Product quality is one of the most critical things in a product offered. Flat glass is one of the many products produced because of high consumer demand. This requires the company to run the production process well to create products that meet consumer expectations. The purpose of this study was to determine the type and amount of waste in the glass-making production process and analyze the root causes of the glass-making process. The method used in this study is a mixed method, namely quantitative and qualitative approaches, which are directly measured using the Lean Manufacture concept approach. Lean manufacturing is a production activity that focuses on reducing waste in all aspects of the company’s production activities. From the results of the study, it can be concluded that the cause of reject is influenced by two factors, namely humans and machines, human factors due to not running the standard operational procedure (SOP) properly, the factors of the machine due to not doing the appropriate machine settings at a particular station.
Causative factor identification of N212-400 product project delay at PT. Dirgantara Indonesia
Authors: Pujiariadi A S , Widiyanesti S
Published: December 2019

PT. Dirgantara Indonesia had a delay project for five aircrafts of n212-400 ordered by the Phillipines and Vietnam. This is a qualitative research using a case study approach in the identification of the causative factor of project delay, with the purpose of study using descriptive research and the process data validity and reliability using triangulation method. The data analysis in this research was the productivity of project, potential failure mode of the project using FMEA (Failure Mode and Effect Analysis) and fishbone diagram to determine the cause and effect of the project delay. The result of the productivity during N212-400 project was 40%, and in aerospace industry, this is below its average of 70% - 80%. Using fishbone and FMEA, the cause of delay and the potential failure of delay project N212-400 was identified and the main factor of project delay based on fishbone and FMEA was machine and material process. Both of the key factors had a high score of RPN (Risk Priority Number) at 810 and should be given priority for improvement.
Use of eggfruit on the making of toast bread
Authors: Sugiarti Y , Azizah D N , Rahayu D L
Published: December 2019

Eggfruit has high nutritional value and good function for health but their consumption still low and the fruit is unfamiliar for most of the Indonesian citizen. This study aims to determine the acceptance of panelists on the eggfruit toast bread produced. This experiment was used experimental method by using Block Randomized Design which was repeated two times with nine eggfruit substitution treatments, namely A = 0%, B = Puree 10%, C = Puree 20%, D = Puree 30%, E = Puree 40%, F = Flour 5%, G = Flour 10%, H = Flour 15%, dan I = Flour 20%. Tests conducted include physical analysis that is color and texture; chemical analysis that is water content, total ash content, protein content, fat content, fiber content, salt content, carotene content, and vitamin C content; and organoleptic tests by hedonic methods on overall appearance, crust color, crumb color, uniformity of pores, tenderness, weakness, flavor, and taste. The results showed that panelists acceptance of eggfruit toast bread produced has the criteria of dislike-like for overall appearance, crust color, crumb color, uniformity of pores, tenderness, weakness, and flavor, while for taste is ordinary-like.
Implementation copula to multivariate control chart
Authors: Lestari T E , Nisa S K , Citra F , Asri G B
Published: December 2019

Multivariate Control Chart is an effective tool in Statistical Process Control to identify either an out-of-control process or in-control process. Hotelling T2 control chart is a quite popular and widely used technique in this field. However, its performance is deteriorated when the underlying distribution of the quality characteristics is not following the multivariate normal distribution. Multivariate control chart usually recommends a procedure in the phase-in Hotelling T2 control chart although there is difficulty in interpreting the signals from multivariate control charts more work is needed on data reduction methods and graphics techniques. Basically, the multivariate control chart refers to the theory of prediction interval. Therefore, it’s called predictive multivariate control charts. The purpose of this research is to construct what so-called predictive multivariate control chart both classical in this part in the phase-in Hotelling T2 and Copula-based ones. We argue that appropriate joint distribution function may be well estimated by employing Copula. A numerical analysis is carried out to illustrate that an Application Copula-based Multivariate control chart outperforms than bivariate control chart and others.
Optimal distribution route to minimize transportation costs in soft drink industry
Authors: Sembiring A C , Sanjaya A , Willyanto W
Published: December 2019

Minimum mileage and maximization of utilities will help the product distribution process to be optimal. Soft drink companies in the city of Medan have problems in distributing products to consumers who are not on time. This is related to the lack of regulation of product distribution channels by the company. Therefore this research was conducted to optimize product distribution routes in order to minimize distribution costs. With the Traveling Salesman Problem (TSP) method, it will combine several closest distribution routes and improve the route sequence. Then the development of sub-routes that are formed from the travel time and utility of transportation equipment used. Formation of sub-routes is still done manually while increasing the order of sub-routes is done by using the Software Quant System (QS) version 3.0. and produce minimum mileage on each sub-route. In planning product distribution, 6 proposed sub-routes are formed in one week and are served by 1 transportation car with a capacity of 220 crates. The proposed sub-route is 171 km shorter than the available sub-routes, thus shortening the travel time of 302 minutes to transport the product.
Employability skills: Industry perspective and achievement of student of employability skills
Authors: Hendrawan R F , Daryanto D
Published: December 2019

The purpose of this study was to explore the importance of graduate work skills through an industry perspective. The method used uses a survey of 23 industries in various fields in Jakarta. The instruments used in this study were adapted from the SCANS model and integrated the Indonesian National Qualifications Framework (KKNI). The survey results show that the industry’s perspective on employability skills based on the IQF contains managerial abilities and attitudes. Another finding has found that the achievement of students’ employability skills obtained an average score of 83.1 with a very high category, with details of managerial abilities getting a score of 83.4 and an attitude score of 82.8. Thus the industry perspective on the need for employability can be fulfilled through the achievement of student employability skills.
Forecast gas well production performance with well test analysis for oil and gas industry
Authors: Samsol S , Rahmawan S , Ridaliani O , Gunawan R K
Published: December 2019

Well, test pressure and deliverability analysis are carried out to determine permeability (k), skin formation damage factor, initial pressure (Pi), (ΔP skin), investigation radius (ri), the boundary of the reservoir. The results of this work are used to calculate the initial gas reserves by wells and predict production capacity in the wells studied (AOFP). Furthermore, an optimal production plan will be produced to produce the most economical value. The result of this work is the initial pressure value (Pi) which is equal to 862 psi. The skin values of the pressure derivative and Horner Plot methods are -0.214 and -0.232 respectively, the permeability value is 148 and 135 mD, the value of the investigation radius is 2110 ft. The resulting AOFP is 8214 Mscf/D. The calculation of the initial gas reserves by well uses the volumetric method which is equal to 458 MMscf. These results carried out forecasting production performance aims to determine the most optimal production planning. This production plan, the scenario plan are the 1st scenario with a gas rate of 2 MMscf and 2nd scenario uses a compression 50 psi with a gas injection rate of 1 MMScf. Furthermore, the best scenario of this research is the maximum production by using 50 psi injection rate of 1 MMScf.
Implications on the total business approach to the press red brick supply chain
Authors: Taptajani D S , Ikhwana A , Chandrahadinata D , Hakim B L
Published: December 2019

Many strategies can be done by the company when it has an impact/implication, including the main actors in the red brick supply chain network press consisting of five business actors namely suppliers, manufacturers, distributors, retailers, and consumers. Continuous performance measurement is the key to all types of business success, so the purpose of this paper is to review the impact of the entire supply chain on the total effort undertaken, where performance measurement systems in the context of supply chains generate potential avenues for future research especially for new business people to be able to see what things need to be considered when starting a red brick press business. The author has found and classified the supply chain performance measurement system as one method of approach and systematic decision-making techniques. This study reveals that the SCOR Model approach as an indicator of red brick supply chain performance measurement and Analyst Hierarchy Process (AHP) as a decision-making tool can make a real indicator in the implementation of the current red brick business along with the impact on the market so that it is expected to get a solution to declare the effect of the red brick supply chain.
Analysis the influence of heterogeneity reservoir on RM field
Authors: Husla R , Prakoso S , Fathaddin M T
Published: December 2019

RM field is one of the fields located in Java Island. RM Field has great potential to be developed, In RM field water injection has been done to increase the value of oil production. The purpose of this paper are to find out the effect of heterogeneity on the RM field with dykstra parson and mobility ratio methods. The layers will be analyzed in the RM field were layers 22, 23 and 24. The results of the analysis for the Vdp value at layer 22 is 0.828, the Vdp value at layer 23 is 0.814, and the Vdp value in layer 24 is 0.812. In addition, a mobility ratio analysis was carried out using rock type 1 on the RM field and the M value on rock type 1 was 0.3429. The conclusion is with the dykstra parson analysis, it can be seen that RM field reservoirs tend to be heterogeneous, this is seen from the Vdp value which approaches the number 1, which is equal to 0.812 to 0.828, and with a value of M <1 which means it can produce high sweeping efficiency and produce good oil recovery.
Thermal characteristics of the X geothermal resources, and a recommendation on utilization possibility
Authors: Pudyastuti K , Harmen H , Djumantara M , Fadhlurrahman S
Published: December 2019

Like in petroleum, geothermal has a high cost and risk in exploration, development including drilling and utilization. This needs a clear definition and understanding of the nature and characteristic of the system in question, so the increasing of investment cost and risk could be mitigated. Un-like in the petroleum industry, reservoir engineering and geoscience are intricately intertwined in geothermal. Considering this issue, in this study the author has integrated the results of reservoir engineering analysis with geoscience concept, to determine the up-flow zone, is a zone with high thermal potential and high permeability, so it can develop as geothermal field. It was conducted at a geothermal prospect in Indonesia located at the average altitudes of about 1000 meter above sea level (m.a.s.l), where 26 wells have been drilled. The research focus in characterising of the system, using wellbore temperatures and pressures measured. This will conclude the reservoir temperature and pressure as well as enthalpy, and up-flow zone by deploying several methods and approach: namely Horner temperature, BPD curve and Pivot concept, and thermal conductivity or heat transfer concept which applied in geoscience. The research includes a literature review on heat energy conversion to electricity based on reservoir temperature and or enthalpy approach, which is used to recommend the conversion system that can extract the heat efficiently. In addition, the question on location of the up-flow zone has been answered by this study, i.e. in the southern part of the field.
Strategic partnership design in the development of a domestic waste-to-renewable energy industry
Authors: Solihat A , Permana I , Setiawan R , Nugraha S , Hamdani N A
Published: December 2019

Based on Government Regulation No 79 of 2014 about National Energy Policy that the Indonesian government is committed to developing a renewable energy mix of 23% in 2025 however its utilization in 2019 is only 3%, these condition encourage the efforts of the Garut government to commit to developing renewable energy by utilizing domestic waste into electricity. To implement, the government of Garut is supported by private industries from South Korea and Japan. The purpose of this study is to design a partnership strategy so this project can give benefit for both parties by mapping the role of each stakeholder and analysing the impact of this project on the surrounding community. The survey was conducted by collecting secondary data from Department of Environment, Hygiene and Landscaping and Central Bureau of Statistics of Garut and conducting interviews with related parties. The results of the study indicate that the limitations of technology by government can be transfer by the involvement of the private sector from South Korean and Japanese investors as operation management. A model of partnership strategy can help to realize the project that can increase the use of renewable energy in Indonesia.
School management on the basis of character building in teaching learning process
Authors: Marini A , Maksum A , Edwita E , Satibi O , Kaban S
Published: December 2019

This study aims at presenting school management model based on character building in teaching learning process. This survey research was conducted for 450 students at elementary schools in Jakarta in Indonesia. Structural Equation Modeling (SEM) was used in analyzing data. Study result found that model hypothesized was a good fit for the data. Other findings confirmed that teaching learning process preparation, teaching learning process, and teaching learning process closing are positively correlated with character building in teaching learning process. The three dimensions consisting of praying, connecting teaching material with good attitude development, and inspecting the student uniform neatness have positive correlation with preparation of teaching learning process. Teaching learning process can be predicted by teaching cooperation in teamwork, encouraging student to ask questions, and paying attention to student attitude. The three dimensions determining closing of teaching learning process are praying, greeting, and reflecting by integrating with character values. It can be concluded that the model of school management focusing on character building in teaching learning process proposed can be used by elementary schools in Jakarta to improve student character building.
Predictive value of entrance test with the academic achievement of medical students
Authors: Ningrum R K , Ekayani N W D
Published: December 2019

A medical student must pass rigorous entrance tests including academic test, academic potential test, health test, and interview test. The test is expected to have predictive value for the academic achievement of students reflected in block test. This study aims to predict the entrance test with academic achievement. This study correlates academic test and academic potential test with block tests in the first semester for student academic year 2018 (n = 106 students). Spearman correlation was conducted to determine the correlation between academic test and academic potential test with block test students in semester 1. There were negative correlations of academic test with block test (-0.254, p<0.05) and positive correlations of academic potential test with block test (0.457, p<0.01) in the first semester. This study shows that the students who have high academic test has lower block test and students who have high academic potential test have a higher block test. The academic potential test can predict the academic achievement of medical students.
Implementation of content business process reengineering framework in an information system
Authors: Dwanoko Y S , Agustina R
Published: December 2019

The Accounting Information System in the Drinking Water User Association (HIPPAM) is a system that manages the financial flow of an organization. In general, this information system manages customer data, water usage transactions, reports needed on web-based systems. This system has been running for 3 years. The purpose of this research is to produce the requirements for accounting information system software needed. This study uses the Reengineering Software Framework method, namely Business process Reengineering (BPR) which focuses on the reengineering framework of accounting information systems. The results of this study in addition to implementing the framework, also produce standard document content produced at each stage in the BPR. The implications of this study are expected to be used as a reference for future similar studies.
Proactive socio-technical system as an unemployment solution in West Java
Authors: Mubaroq S R , Gustiana I , Alamsari F , Artarina M , Nurohmah H
Published: December 2019

The objective of this study is to make digital platform design as the innovative solution to overcome an unemployment problem in West Java. West java has been in the highest position of unemployment in Indonesia. It has been caused not only by social but also by cultural matter. Moreover, West Java has become the favorite destination for migrants from other provinces to seek for jobs and to go to study. This study used the method of a socio-technical system analysis by combining social and technical aspects as the basic analysis to solve this problem. The steps of this analysis done in this study were by documental observation and data statistical process. The result of this study will be the digital platform designs that are web and mobile named as UDUNAN. This platform will be a community from various groups in which concern about solving the problem of unemployment through online forums, workshops, and entrepreneurial training and languages especially English and Japanese for free.
The effectiveness of evaluation application implementation based on Alkin(CSE-UCLA)-Weighted Product model to evaluate the digital library services as education supporting facilities
Authors: Divayana D G H , Suyasa P W A , Abadi I B G S
Published: December 2019

Digital library can be said to be quality if it has been able to give services optimally to support the learning process. Efforts to get optimization of digital library service can be executed through the evaluation process. One application that can be used to evaluate the optimization level of the digital library is an evaluation application that combines the Alkin(CSE-UCLA) model with Weighted Product. Related to that statement, this study purpose was to obtain an overview of evaluation application effectiveness used to evaluate the digital library services optimization on computer colleges, especially in Bali. The method used in this study was R&D with Borg and Gall design, especially in the implementation stage. The subjects involved in the assessment of evaluation application implementation were 32 peoples, such as two education experts, 15 evaluators, and 15 users. This study location was carried out on six computer colleges in Bali. The data collection was conducted by distributing questionnaires that consist of 15 items to all research subjects. The analysis technique for data collection results uses quantitative descriptive based on effectiveness percentage level of digital library services. These study results indicate the effectiveness level of evaluation application based on Alkin(CSE-UCLA)-Weighted Product model was 86.38% so that it includes the good category. The impact of the results of this study is the level of effectiveness of digital library services in several computer colleges in Bali increasing and has implications for the field of education in the presence of new evaluation models that can be used to determine the education support services effectiveness based on artificial intelligence.
Combining statistical and interpretative analyses for testing IT implementation readiness
Authors: Irfan M , Putra S J
Published: December 2019

Researchers often use interpretative data analysis to test questionnaires by confirming the results of statistical analysis, but the researchers did not elaborate comprehensively how confirmation was made. Most use statistical analysis techniques only to test and assess questionnaires. In addition, interpretive confirmation is common for experienced researchers when conducting research, in contrast to novice researchers who have problems confirming the interpretive results of the questionnaire. This study explains how to combine statistical and interpretative analysis with testing the IT implementation questionnaire on HEI. The aim is to assess the questionnaire using statistics and interpret the results of statistical analysis. This finding can help researchers to test questionnaires; confirmation results can be a consideration and knowledge to revise the questionnaire.
Preliminary design of CIPP-SAW evaluation model in measuring ICT-based learning effectiveness in health colleges
Authors: Ariawan I P W , Giri M K W , Divayana D G H
Published: December 2019

Evaluation activities are essential to be conducted to measure the effectiveness level of the ICT-based learning process in colleges, including also specifically for health colleges. Evaluation models that are often used to measure ICT-based learning effectiveness in health colleges are formative-summative models. However, reality shows that the evaluation model is not effective. The problems solving to overcome that problem is to develop a new evaluation model in the form of CIPP (Context-Input-Process-Product) model based on SAW (Simple Additive Weighting) so that it can show the assessment accuracy level to ICT-based learning quality aspects. This study purpose was to know the initial design of the CIPP model based on SAW. This research uses the Borg & Gall development method, which focuses on the model design phase. Subjects involved in designing this evaluation model were three peoples with academic classifications in the fields of information technology, educational evaluation, and health. The research results showed that there was a clear evaluation model design using CIPP evaluation components and SAW methods in conducting learning evaluation. The impact that arises from this study results is the effectiveness of the implementation of ICT-based learning was more clearly measured, while the implications of this study present an evaluation model innovation in the field of education which is the adoption of decision support system concept in facilitating the calculation of the effectiveness of each evaluation aspect starting from the highest level to lowest.
Implementation of Fuzzy C-Means algorithm to classifying research topics in informatics department, UIN Sunan Gunung
Authors: Saputra M I N , Fauzy D , Hakim R A , Dauni P , Firdaus M D , Taufik I
Published: December 2019

The more rapid and large number of electronic documents stored in University library repositories or Departments, such as scientific works from academicians including theses, research reports, etc., are available in the digital version. In the process of grouping the thesis title automatically it is hoped that it can help policy makers such as the head of the study program. In this case the researcher uses fuzzy c-means algorithm which can group data in clusters so that the data of a cluster has a high level of equality with each other. In the application there is a text mining method which is a development of data mining that can be applied to overcome thesis grouping problems or research data. The result is a web that can classify research data / thesis data with a total accuracy of 96%. This number is the accuracy given based on the performance of the fuzzy c-means algorithm on the system.
Effectiveness of utilizing VCO oil and castor oil on natural creams for dry skin treatment due to environmental factors
Authors: Atmanto D
Published: December 2019

Rapid industrial development can lead to environmental pollution. Bad air environment will cause damage to the skin such as dry skin. Indonesia has biological natural resources such as coconut trees and castor oil plants. Both oils can be used to make skin care due to the impact of heat by the environment. This study aims to determine the effectiveness of using VCO oil from coconut and castor oil in natural creams to treat dry skin. The method of this research is comparing composition variation of VCO oil and castor oil to make natural creams. The experiment was carried out on 10 dry skins of student volunteers. Research using designated randomized group is divided into two groups. Group A is the experimental unit for treatment and group B is a comparison group, with subjects are selected by purposive sampling from a particular population. This study used an 8-experimental design of the initial test until the final test in both groups. The results showed that t count > t table is 2.441> 1.330 so Ho is rejected and HI is accepted at the 0.05 significance level. There are differences in the use of pure coconut oil cream (VCO) and castor oil cream to reduce the smoothness of the skin.
Local community empowerment in developing processing of cinnamon essential oil (Cinnamomum burmannii) as a skin care material
Authors: Atmanto D , Nursetiawati S
Published: December 2019

This study aims to determine the cooperative relationship of farmer groups who cultivate cinnamon plants and do cinnamon distillation to obtain essential oils with the support of private business communities in the village of Cijalu Curug, Subang, West Java. The data of this study were obtained through surveys and interviews with 30 respondents from farming communities in Curug Cijalu village. To complete the information, it was also observed the process of community empowerment to improve forest ecosystems with productive crops and training in the distillation process with marketing management by the private sector. Data sources use primary and secondary data sources. Data collection techniques include interviews, observation and documentation. The technique of checking the validity of the data uses the source triangulation technique. Data analysis includes the stages of data collection, data reduction, data presentation and conclusion drawing. The data obtained, carried out an analysis to find out the description of the effectiveness of community empowerment and the private sector in order to improve the welfare of farmers and preserve the forest environment to remain sustainable. Cinnamon essential oil containing cinnamaldehyde (60.72%), eugenol (17.62%) and coumarin (13.39%) functions as an antibacterial and can treat skin due to polluted air environment. Cinnamon essential oil can be used as a cream and soap ingredient. Soap and cream products can be used for skin care. Cinnamon trees are widely planted in the Subang area of West Java. The results of the study show that a. through steam distillation, cinnamon essential oil is obtained, b. cinnamon tree waste such as leaves can be processed distillation into essential oils, c. Local people can practice processing essential oils as a result of training, and d. The community can develop the business of processing cinnamon essential oil independently, so that it can be used to add value to family income.