bluuebunny/crossref_metadata_2025 huggingface dataset:
Environmental performance of window systems in patient rooms: a case study in the Belgian context
Authors: Eisazadeh N , De Troyer F , Allacker K
Published: September 2019

Hospitals produce high amounts of emissions due to their continuous operation, high flow of people, and intensive HVAC requirements. In order to reduce the environmental footprint of hospitals, it is crucial to improve energy performance while still maintaining a comfortable indoor environment for the occupants. Also to avoid high environmental burdens, it is important to understand the impact of building material selection from the full life cycle perspective. Window systems influence the energy loads and comfort in buildings and provide access to daylight and views. Therefore, windows contribute significantly to the energy consumption and indoor environmental quality of buildings and impact the well-being of occupants. The aim of this study is to determine the influence of various window system design configurations on the environmental performance of patient rooms in Belgium through life cycle assessment (LCA). The method is innovative as it combines dynamic energy simulations and daylight analysis and integrates these in the LCA study of the window systems. The influence of several components is investigated, such as the choice of glazing and shading system. The results are analysed and compared in terms of energy cost for heating, cooling, and lighting, daylighting performance and life cycle environmental impacts. A typical patient room from a hospital design in Belgium is used as a case study. Based on comparative analysis, the paper discusses potential window system design configurations that allow for energy efficient, daylit and environmentally-friendly patient rooms.
Perimeter blocks in different forms – aspects of daylight and view
Authors: Sundborg B , Szybinska Matusiak B , Arbab S
Published: September 2019

The perimeter blocks in cities are usually rectangular and follow the streets. The buildings are mostly of similar height within each block. However, perimeter blocks can be developed in many various forms. Geometric options such as chamfered corners, varied building heights and different positioned openings in a broken perimeter block are analyzed in this paper regarding the aspects of views and daylight in city planning. The choice of evaluation criteria is based on scientific discourse in the field of daylighting. As in the new European standard, “Daylight in Buildings”, the following three parameters are included in calculations: solar radiation, daylight level and view out. Computer-based daylighting simulations and calculations of view parameters are performed for different designs of the perimeter blocks with equal density, FAR = 1.33. The simulations have been carried out for Stockholm. That means roughly the same shadows as in Oslo, Helsinki, Tallinn, St Petersburg and Anchorage, all close to the same latitude (60°N). In lower latitudes, e.g. Southern and Central Europe the shadows are shorter. Nevertheless, the ranking of the alternatives will be similar. This study confirms that geometrical changes can improve the conditions for views and daylight in the perimeter blocks. The advantages in the tested urban design alternatives are considerable compared to the perimeter block of the standard type.
Hoppet - the first fossil free preschool
Authors: Hall A , Högberg A , Ingelhag G , Ljungstedt H , Perzon M , Stålheim N J
Published: September 2019

Residential and commercial buildings give rise to about one fifth of the greenhouse gas emissions in Sweden. One important goal of the City of Gothenburg is to be a climate neutral city with fair emission levels of greenhouse gases in 2030. In order to reach this goal, a demonstration project has been initiated with the aim to build a fossil free preschool - Hoppet. Hoppet will be built with a minimal climate impact and with no fossil resources. This includes everything from production and transport of materials to energy usage in the building. The fossil content and the climate impact of a standard preschool has been calculated, to be used as a benchmark for Hoppet. The result shows that all 250 building products in the reference preschool have a climate impact but finding fossil free and climate neutral alternative products has been found challenging. The climate impact of the building products in the reference preschool is calculated to more than 220 kg CO2-eq. per m2. Strategies to decrease climate impact for Hoppet preschool has been developed. For example, product development and innovation has been identified as key issues as well as increased collaboration between different actors in the construction industry. Communicating the project internationally is of high importance to find partners and innovations that don’t exist in Sweden as well as to engage other stakeholders to help transform the building sector.
Life cycle environmental and cost evaluation of heating and hot water supply in social housing nZEBs
Authors: Hernandez P , Hernandez J , Urra I , Grisaleña D
Published: September 2019

This paper presents a comparative analysis of different space heating and hot water systems for a social housing project in Santurtzi, Spain. The building, comprising 32 apartment units and currently under construction, has been designed to minimize thermal energy demand, while ensuring comfort and quality of the internal environment for the social housing occupiers. The selection of the heating and hot water energy systems has been carried considering a life cycle perspective both for environmental and economic impacts. Different alternatives have been analysed which compare conventional gas boiler installation, which has been the norm for this type of social housing for the last decades, with various options based on heat pump technology. Life cycle analysis of the environmental effects of electrification of the thermal energy demand through heat pumps show a potential for reducing life cycle CO2 emissions. The economic evaluation done through life cycle costing, comparing investment, maintenance, replacement and operational costs of gas boiler with aerothermal and geothermal heat pump solutions, have shown however that gas heating solutions are still the most competitive economically. Increasing the overall efficiency of those heating and hot water systems that include heat pump technology, while reducing their uncertainty in operation is a key element to ensure competitiveness of heat pumps in the current market.
Effects of the tenants electricity law on energy system layout and landlord-tenant relationship in a multi-family building in Germany
Authors: Braeuer F , Kleinebrahm M , Naber E
Published: September 2019

Multi-family buildings (MFB) accommodate 53% of the German apartment stock. Although PV-systems on single-family buildings are widely implemented, the PV-potential on MFBs has barely been touched. Therefore, the German government introduced the Mieterstromgesetz, the tenants electricity law (TEL), in 2016. This law exempts electricity directly produced and consumed in a building from certain charges and taxes. Within the TEL framework, the landlord acts as the local electricity provider and can profit from selling electricity to the tenants and tenants can save electricity costs. This paper analyses the techno-economic effects of the TEL on the energy system layout of a MFB in Germany. Furthermore, it gives implications on how the TEL affects the tenant-landlord relationship. In this analyses, a MILP model is used to maximize the net present value (NPV) and determines the optimal layout and dispatch of the energy system. The model can choose to invest in PV, CHP and a battery storage system. Additionally, one to six electric vehicles (EVs) are integrated into the model. The novelty of this paper is the model-based analysis of the German Mieterstromgesetz considering EVs. The results show that the combination of PV and CHP is the most profitable system layout with NPVs up to 31.9ke. An optimized charging strategy increases the self-consumption rate and the NPV substantially compared to a fast-charging-strategy. Thus, the TEL can create a symbiotic relationship between landlords and tenants.
Strategies for a sustainable energy transition: the case of the housing sector in Graz, Austria
Authors: Hohmann B
Published: September 2019

To facilitate a sustainable energy transition, the housing sector needs to be considered as a whole. Consequently, buildings as well as spatial structures have to be sustainable. Buildings, new and existing, need to be energy efficient, low carbon, considering diverse demands, while also providing a healthy indoor environment and a high quality of life. Spatial structures have to be efficient through compact development, supporting the transition to a post fossil society and mobility regime, that also provide high quality public spaces. In a transdisciplinary approach, strategies and policies, relevant for the case of Graz, Austria, were analyzed. Challenges and potential solution approaches were identified in a theory discussion, considering spatial development and construction aspects. A resulting set of measures to support the necessary sustainability transition is evaluated and iteratively enhanced by qualitative expert interviews with relevant stakeholders, i.e., researchers, practitioners and the administration. The aim of this research is to come up with a set of policy recommendations for decision makers. First results of this work in progress are already available and presented in this paper.
Integrating Importance-Performance Analysis into E-S-QUAL and E-RecS-QUAL scales for Assessing Electronic Service Quality
Authors: Ulkhaq M M , Rabbani M , Rachmania B A , Wibowo A T , Ardi F
Published: September 2019

In this globalization era, service sector has been arguably affected and influenced by the internet for doing several activities, especially in doing business. As a result, service sector nowadays has transformed from the conventional way into the electronic service (e-service). This paper tried to integrate the importance-performance analysis (IPA) model to E-S-QUAL and E-RecS-QUAL scales to assess the e-service quality. It implies that not only the performance of e-service quality is assessed, but also its importance. It is according to the fact that every service provider is believed to have limited resources. Therefore, the resources have to be best deployed based on the priorities (i.e., importance) to achieve customer satisfaction. A case study was performed in one of the largest online fashion shops in Indonesia to show the applicability of the methods. It is believed that this research could offer the service providers with valued understanding of the service attributes that manifest point of views of the customers.
Measurement of Intermediary Trader Efficiency in Poultry Distribution Using Data Envelopment Analysis Method
Authors: Purwaningsih R , Pratiwi C G , Susanto N , Santosa H
Published: September 2019

The in-efficiency in resource usage are still common problems in poultry industry. In-efficiency in operational distribution system made the price of meat were so expensive at end customer. Increased efficiency is needed to improve competition capabilities. This research aims to measure the relative efficiency of intermediary trader in poultry product by using Data Envelopment Analysis (DEA) and formulate recommendation based on result of DEA. The result of data processing shows that 3 of 11 intermediary classified as inefficient group. These intermediary trader group should increase their relative efficiency by aligning the influencing input variable of distribution cost and overhead cost.
Campus Sustainability Practice Assessment: An Empirical Finding from Jönköping University, Sweden
Authors: Ulkhaq M M , George Joseph R S , Javed B , Nadekar N R
Published: September 2019

The role of higher education institutions (HEIs) nowadays in promoting sustainability has outspread over the past decades. This is a result of abundant declarations and conferences about the need for sustainability in higher education. As consequences, several HEIs have integrated sustainability into their curricula, research, programs, projects, partnerships, and assessments. The objective of the research is to assess the campus sustainability practice of Jönköping University, which is located in Jönköping, Sweden. The assessment includes three pillars of campus sustainability, i.e., environmental management, public participation and social responsibility, and research and teaching as well. The assessment is considered could yield various benefits, not only for the university but also for the stakeholders, surrounding society, as well as for the academic purposes.
Modelling Raw Material Policy in the Palm Sugar Industry While Considering Sustainability Aspects: A Dynamic System Approach
Authors: Krisnawati M , Mustikasari A , Uletika N S , Adhiana T P , Sutrisno E
Published: September 2019

The availability of raw materials is one important factor in managing the supply chain to support the sustainability of the palm sugar industry. The number of raw materials in the palm sugar industry is influenced by various aspects stemming from the environment, economy and the coconut trees themselves. These aspects are interconnected and interact with each other to support the availability of raw materials in the palm sugar industry. This study is conducted in Purbalingga, Indonesia. The dynamic system analysis of palm sugar inventory will be compared to the demand for palm sugar. Inventory and demand analysis is used to influence policy decisions on how to manage the raw material production area. A model for raw material policy in the palm sugar industry is developed using the dynamic system. Model divided into a demand model and a model of neera coconut inventory and backlog demand. The model in this research can be used to simulate the palm sugar industry in a broader system, because validation for this model gives a small value error of 𝜇̂𝑀 and MAPE.
Factors Supporting The Implementation of Mass Transport System in Indonesia
Authors: Lady L , Ardani M S , Ferdinant P F
Published: September 2019

Development of cities in Indonesia is along with increasing of community mobility that traveling from the surrounding district (hinterland) to the central city and its reverse. However dominanly city in Indonesia haven’t mass transport system. Unavailability of mass transport facilities also have taken place in Cilegon, one of industial city in Indonesia. The ratio of the use of public transport and private transport vehicles in Cilegon was 1:90. Bus Rapid Transit (BRT) was one alternative to serve good public transport. This research aims were look at factors that affect the success of the BRT application, and analyzing important factors that support BRT implementation. The approach on technology transfer was used in determining the characteristics of the transferor and transferee in supporting the implementation of mass transportation. Three parties involved in the transfer of technology in the BRT system were goverment, operator, and the community. This study procured there were nine factors supporting the implementation of Bus Rapid Transit (BRT) System, they were transferor readiness, basic capabilities and adaptation to the mass transport system, transferee readiness, supporting regulations and policies, cooperation in the supervision and services development, counceling and community management, culture, confidence level, and local sub contract. Nine construct factors represented the data in terms of variance explained (61.802%). The transferor readiness was the main factor with percentage of explanation was 25.987%. The main role in technology transfer in BRT system was hold by the Government as a manager that playing role in achievement of targets 46.89%.
Design of Ergonomic Assault Vest for Indonesian Army with Modular Concept
Authors: Prayogi A D , Dewi D S , Sudiarno A
Published: September 2019

Assault vest is one of crucial products for Indonesian army infantry soldiers to support their activities in the battlefield. Despite its importance, however, the design of the assault vest of Indonesian army was not considered Ergonomics aspects. Based on the deep interview and questionnaries distributed to 30 Indonesian Army infantry soldiers, the current design was not really comfortable and limit the freedom of movement in the battlefield. Because of this, this research aims to design a modular assault vest for Indonesian army infantry that considering Ergonomics aspects. The object of this study was the 411 Infantry Batalyon / Pandawa located in Salatiga City, Central Java Province, with a total sample of 30 active infantry soldiers involve in this study. The research was conducted by using Nordic Body Map method, questionnaire, deep interview, and TAFEI (Task Analysis for Error Identification) as well as Kansei Engineering. The prototype was built to test the proposed assault vest design. A physiological test using the physiological test method of Dr. Woldemar Gerschler was conducted to test the prototype and then the results of the data (VO2) are tested by applying t-test statistical analysis to see whether the proposed assault vest design will have better performance than existing assault vest. Physiological tests were carried out by 23 respondents who were members of a football club. The test indicate that the proposed design show better result in terms of oxygen consumption.
Machines Maintenance Interval on Filling Lithos Lubricant Production Line: A Case Study
Authors: Rosyidi C N , Suryono M A E , Laksono P W
Published: September 2019

The growth of industry in Indonesia is fast enough to encourage industrial players to improve their production capability. One of the sectors that has continuous increase in demand is the lubrication sector. This research was conducted in a major lubricants company in Indonesia that has 16 hours of work to meet market needs. The production capability and capacity of the company are affected by its production resources, one of them is the machine. Current machine’s reliability in the company is below 85%, hence it needs efficient maintenance activities to improve and maintain the machine’s reliability. In this research, we develop a simulation model to determine the maintenance interval to achieve world class standard of machine reliability at minimum 85%. From the results of the analysis, we proposed three alternatives of maintenance activity. First, preventive maintenance with interval maintenance according to the results of the simulation. Second, preventive maintenance with maintenance interval of half day or twice a day in the break time and after workhours. Third, corrective maintenance. The criteria used in comparing the three alternatives are the machine reliability, maintenance cost, and production loss for doing the maintenance activity. Among the alternatives, the second alternative gave better reliability with the lower cost compared to the other two alternatives.
An Effort to Increase the Potential of Virgin Coconut Oil with Pendawa Technique
Authors: Sapatra E F , Yuniarti I , Imamsyah R A S
Published: September 2019

In order to overcome the disadvantages of conventional method, innovations on how to produce coconut oil were applied with the technique of PENDAWA (Pendayagunaan Asam Jawa). Coconut oil comes from coconut milk which is the substance between oil and water (emulsion). So to get coconut oil, acid is needed as an emulgator to break down emulsifying substances. In this case, Tamarind is used because it is cheap, available, contains a lot of antioxidants, and is efficacious. Coconut oil contains medium chain saturated fatty acids, namely MCT (Medium-chain triglycerides) where MCT provides extraordinary health enhancing properties. We compared three types of coconut oil, namely coconut oil in the traditional way, coconut oil with the addition of tamarind, and packaging oil on the market. The result was coconut oil with the Pendawa method very good in quality and quality with FFA 0.0067% and peroxide number of 1.5 mg ek/kg. In conclusion, this oil production with the PENDAWA method is very effective, efficient, high in quality, and provides high profit for the industry that wants to produce it.
Design and Manufacture of a Low-Cost Data Acquisition Based Measurement System for Dual Fuel Engine Researches
Authors: Sinaga N , Yunianto B , Purba D , Syaiful  , Nugroho A
Published: September 2019

The role of data acquisition based measurement system in the researches is essential since it delivers many advantages compared to the manual arrangement. Nevertheless, its cost is comparatively high, then it becomes an obstacle, particularly for researchers in producing nations. The purpose of the study was to obtain a low-cost data acquisition system which has good performance when used in the research of dual-fuel engines. The study included a selection of variables, components and sensors, programming, and calibration. The Arduino based data acquisition system was chosen, which was relatively cheap and easy programming. The sensors/transducers consisted of three K-type thermocouples, three load cells, one proximity sensor, and one DHT-11 sensor. Programming of data acquisition systems was facilitated by using Arduino IDE software. The display and data recording were done in Microsoft Excel software, with the help of PLX-DAQ software. In this study, a low-cost data acquisition based measurement system had been successfully developed, which had low uncertainty, low hysteresis, and excellent repeatability. It is concluded that the system is very suitable to be used in dual fuel engine researches to measure engine speed, fuel discharge, gas fraction, torque, power, brake specific fuel consumption and brake thermal efficiency.
The Literature Review of Cloud-based Enterprise Resource Planning
Authors: Aulia R , Putri A N , Raihan M F , Ayub M , Sulistio J
Published: September 2019

Enterprise Resource Planning also called ERP is a system that is integrated into business processes in a company, some of the benefits of implementing ERP are higher productivity, better insights, accelerated reporting, lower risk, simpler IT and improved agility. However, ERP also has several disadvantages such as high costs, maintenance costs and this became a common problem when using the ERP system. One way to cut high costs is to use cloud computing. Cloud computing is pools of configurable computer system resources and higher-level services that can be rapidly provisioned management effort, often over the internet, cloud computing also can be the solution for companies that want to implement ERP system with low prices. In this paper, we collect several journals about cloud computing and ERP system and combine that into one literature, and this paper discusses methodology, metadata analysis and future journals related to cloud computing and ERP system
The Design of Auxiliary Tool for Flat Motorcycle Tires using the Axiomatic Design Method
Authors: Purnomo H , Kurnia F , Virdyanawaty R I
Published: September 2019

Motorcycle users always deal with difficulties if their motorcycle tires are flat when riding in a place far from a tire repair shop. Distance is a problem that can make a flat tire quickly damaged when the motorcycle keeps forced to drive. Based on the aforementioned issues, a temporary flat motorcycle tire auxiliary tool is needed to serve as a tool that can deliver a motorcycle until it can be repaired at a tire repair shop. The method used in the design was the axiomatic design method. This method was used to determine design parameters using the mapping process. Surveys were conducted to identify customer attributes by distributing questionnaires to identify customer attributes which were then mapped into functional requirements and design parameters. The results of this study were 4 attributes based on consumer desires, among others, motorcycle wheels spinning with auxiliary wheels, easy to install, safe for bumpy roads, and robust enough to support the motorcycle body and rider.
Design Key Performance Indicator for Sustainable Warehouse: A Case Study in a Leather Manufacturer
Authors: Kusrini E , Ahmad A , Murniati W
Published: September 2019

This research discussed the design of Key Performance Indicators (KPIs) for sustainable warehouse for leather manufacturing industry. A thirty four indicators are found from literature study and validated by experts using likert scale. A number of 30 KPIs are declared valid then suggested to be KPIs for sustainable warehouse for leather manufacturing industry. The KPIs consisted of 12 economical indicators,10 social indicators and 8 environmental indicators. To find out the priority of each KPIs, then their importance weight are identified using analytical hierarchy process (AHP) by sending AHP questionnaire to experts. The result shows that Economical factor is the most dominant factor (0,4796) followed by social factor (0,4055) and environmental factor (0,1150).The KPIs and its weight can be used as guidance for leather manufactures to increase their sustainable performance.
Analysis and Characterization Helm Based on Hyacint Water Composites
Authors: Albab S A , Sulistyo  , Nugroho S
Published: September 2019

Material engineering in the field of natural fiber composites has potential prospects. The availability of natural resource was very abundant. Composite with natural fiber reinforcement was called Bio composite. The promising natural resource were water hyacinth. Water hyacinth was a source of fiber that can be used optimally as a filler in composites. Bio composite properties are be affected by several factors including filler volume, process parameters and filler interface properties in the matrix. The use of water hyacinth bio composite was developed as a substitute for shipbuilding materials, board and leg sockets for prosthetic limbs. This research identified the nature of fibers as fillers in the application of motorcycle helmet that meet Standar Nasional Indonesia (SNI). Hyacint fibers are made from water hyacinth plants, the plant is dried by sun shine. The material was crushed into powder and woven fibers with yarn spinner and the both materials are mixed using resin. The bio composite was tested by tensile test and impact test using variations weight fraction. The best high strength of bio composite was used as material helm shell by using a vacuum bagging system. The value of Impact absorption strength and penetration testing will be tested on helmet shell composites. Tests conducted on bio composite helmets are carried out to meet standard safety according to SNI 1811: 2007.
Relationship Analysis between Company Standard, SNI, and International Standard in Washing Machine: A Case Study at an Electronic Company
Authors: Bakhtiar A , Widharto Y , Rinawati D I , Nurfajrianti M
Published: September 2019

PT XYZ is an electronic company that produces some electronic goods, one of which is a washing machine. In 2014, the product has been certified and labeled SNI on its products. SNI is a national standard established by the Indonesian government as a reference in producing or marketing goods in Indonesia. This is done as a protection measure for consumers. In addition, SNI is used as a standard for producers to penetrate international markets. However, the SNI does not specify the overall components of the goods. In the SNI document, there is no provision on the material that must be used, the size that must be imposed, so the company can develop the design, material and size of the product in detail. Development of standards outside the SNI conducted by the company herein after referred to the company standard. Company standards can be derived from innovations and product experiments conducted by the company or can also come from other standards adopted by the company, as an example is international standards on washing machine products. Thus there are several standards used in one washing machine product. For that in this research will find the relation between standard used in one product of washing machine by using case study analysis approach.
Project Scheduling of New Product Development Process in Automotive Industry in Indonesia Using Design Structure Matrix (DSM)
Authors: Reza C M , Dachyar M , Nurcahyo R
Published: September 2019

Innovation technology and development of customer needs diversification drive products to be more complex and the complexity changes the product life cycle become faster than before. Many industries try to create a more rapid new product development (NPD) process in order to enter the market and gain customer earlier than their competitors. Therefore, optimal timing and scheduling become important factors in the success of NPD process. This paper aims to perform project scheduling in NPD process of automotive industry in Indonesia by using Design Structure Matrix (DSM) and the result was compared with Critical Path Method (CPM) as one of conventional project scheduling method. DSM manage every task and information flow within a project including possibility of rework activity that might be occurred in NPD process. The results showed the scheduling technique using DSM calculated shorter development process duration rather than using CPM. DSM also considered possibility of rework activity that might be happened in the real situation.
Modelling and Analysis of Manufacturing Process Layout
Authors: Siregar I , Saedon J B , Adenan M S , Shawal S , Othman M F
Published: September 2019

Manufacturing layout is an arrangement of more than two elements in a manufacturing plant. Process layout shows the layout of elements which running certain process cycle at a certain sequence. Through simulation software, process layout can be simulated and predicted the outcome of the certain model layout before it is implemented. An activity that is conducted in this study such as time study, line balancing and production line re-layout. Furthermore, lean manufacturing tools such as takt time calculation and Yamazumi chart is utilized in order to improve the mechanism in this study. Commercial software is used in order to simulate a model of manufacturing layout and increase the efficiency in the model. These simulated results were compared with the current process layout. The proposed new production plant layout showed promise in its application. However, approaches and layout models need to be evaluated in application to ensure usability so that it is effective and efficient in its performance. The layout of the proposal has increased overall line efficiency which shows an increase of 19%.
Application of SMED Methodology and Scheduling in High-Mix Low Volume Production Model to Reduce Setup Time: A Case of S Company
Authors: Wang S S , Chiou C C , Luong H T
Published: September 2019

Nowadays rapid changes in consumer demand determines the production model. The demand for “single and large quantity” products has gradually turned into a “high-mix and low volume” product demand. The main problem of high-mix low volume model is significantly increasing frequency of set up, causing an increase in set-up time for production. For set-up reduction strategies, Shingo (1985) proposed single minute exchange of die (SMED) methodology. The SMED methodology makes it possible to reduce setup (changeover) operations time within 10 minutes. Therefore, in this study take a cable processing company as a case for improvement. The potential of faster setup cannot be completely achieved with SMED method. So, in this paper, it also provides an optimized scheduling reference indicator for the molding machine that decision makers to determine the sequencing rule of scheduling by each criterion through the system to achieve maximum benefit for company.
Extended-RSA for Encryption Process to Improve Application Server Availability
Authors: Susanto A , Herman  , Putranto M I , Utama D N , Wibowo A
Published: September 2019

Every enterprise stores and operates its transactions confidentially, therefore it has to encrypt the transaction to protect it from data intruders. Technically, most encryption processes are ranging from hundreds of milliseconds. If there is a lot of encrypting process, then the performance will be getting bottleneck and the transaction’s speed is being slowed down. In this paper, a promising scheme by adding GZIP compression on the former RSA encryption method to increase speed is proposed; thus every transaction is going to require less times, therefore the number of failed transactions or requests will be reduced. Hence, this way makes the transaction easier for customers to do. The result of little experimental test shows that using XOR to stream cipher-text to replace the absent of padding into specific bytes shows a lot of performance increase resulting other factors such as availability also affected without sacrificing the security level.
Application of Risk Identification, Risk Analysis, and Risk Assessment in the University Laboratory
Authors: Budihardjo M A , Muhammad F I , Rizaldianto A R
Published: September 2019

Currently, the presence of laboratories has become a difficult thing to be separated from the learning system in the university. Moreover, there are many universities that have begun to encourage their students and lecturers to do researches more frequent, for needs both of lecture activities and theses. These conditions trigger the laboratory management to improve their service quality, such as through improvement of the comfortability. From this improvement, it is expected to increase the productivity of people who are doing their activities in a laboratory. However, while the working productivity is being prioritized, there is a problem that is often forgotten, namely health and safety environment. An unhealthy working environment has the possibility to cause stress to people who are working in it. Hazard potentials that exist in a laboratory are caused by the use of reagents and research equipment. To prevent the occurrence of these hazard potentials, deep understanding of risks potential in a laboratory is needed. Based on a research at XYZ Laboratory, a risk analysis and risk assessment are needed to be done by a laboratory, which is often used by students and lecturers in a university, with the purpose of determine the severity and likelihood level of an incident happened. Furthermore, AS/NZS 4360-2004 method, which is used in this research, is also a method to determine the priority of how handle a risk and what is the best step to prevent it.
The Influence of Green Supply Chain management on Company’s Performance and Competitiveness in Wood Furniture Industry: An Overview of Conceptual Model
Authors: Likumahwa F M , Purwaningsih R , Handayani N U
Published: September 2019

Based on the literature review, this research proposes a conceptual model to measure the influence of green supply chain management (GSCM) practice toward the performance and companies’ competitiveness in wood furniture industry in Jepara. The model shows how the performance and company’s competitiveness depends on GSCM practice. The conceptual model are consists of three hypotheses which are the influence of GSCM’s practice on company performance, company competitiveness and hypothesis, and the influence of performance on the company competitiveness. This research uses Interview and design questions by giving it directly to owners of the wood furniture industry as the respondents in testing the conceptual model empirically.
Material Handling Performance Measurement and Metrics for Internal Milk-Run Area using Overall Transportation Effectiveness. Case Study: Automotive Industry
Authors: Putra F M A M , Ridwan A Y , Astuti M D
Published: September 2019

Overall Equipment Effectiveness (OEE) is a formula that is used to measure productivity and diagnose system deficiencies in equipment level. In traditional usage, these matrix formulas have the disadvantage of detecting the internal milk-run method in its application. In order to address this gap, Overall Throughput and Overall Transportation in milk-run concept were developed to understand the overall productivity in manufacture using milk-run concept. The goal is twofold: measuring the productivity in manufacturing ratios seen from the product flow during entering the plant and when it exits from the production process, and can be carried out diagnostic internal milk-run on the production area. This journal describes the OTE(Tr) development methodology, which can improve productivity with continuous production of products and engine capacity flow in manufacturing, which is the combination product and more supply in raw material supply in the production line. The OTE(Tr) is only used for material handling outside of manufacture, metrics transportation in this case will be adjusted in material handling equipment concept. Framework Implementation in the study case: Industry automotive can be identified as a whole plant.
The Main Critical Risk in the Supply Chain of Component Automotive Industry: A Case Study
Authors: Alitosa F , Kusumah L H
Published: September 2019

In automotive component company that produce electric components their supply activities have the opportunity to arise risks. Therefore, is necessary to identify and analyze critical risks or disturbances that are likely to arise and mitigate risks in operational activities in the component automotive supply chain. This research was conducted with using a house of risk model consisting of 2 phases. The first phase is identifying risk and agent risk, which then measure the severity and insurance level and calculate the aggregate risk priority (ARP) value. The second phase is handling risk. After doing research risk mitigations which were prioritized to be realized were review the current SOP and control the implementation, make punishment policy that does not to according to the SOP, maximize supervision to subordinates, discussions with customers for specific policy change in each issue, improve production and inventory control performance, arrange engine maintenance programs according to production capacity, discussion to review contracts with suppliers, strengthen implementation TQM in supplier and look forward to more long term potential supplier.
Integrated Batch Production and Multiple Preventive Maintenance Scheduling on A Single Machine to Minimize Total Actual Flow Time
Authors: Yusriski R , Astuti B , Ilham M , Zahedi
Published: September 2019

We discuss the problem of batch production and multiple preventive maintenance (PM) scheduling on a single machine. On batch production systems, there is a situation that PM activity should be executed at the time when the machine is processing the parts on a batch. Delaying that action could cause an increase in the possibility of a rejected product. However, applying the PM action would interrupt the process and also need an additional setup when starting the process again. It could impact the longer total flow time. This research proposed two algorithms (the optimal and the heuristic algorithm) which integrated both of batch production and multiple preventive maintenance schedules. The performance of the algorithm measured by minimizes the total actual flow time. Experimental results show that the effectivity of the heuristic algorithm is between 66% until 100% from the optimal algorithm.
Environmental Performance in Indonesia Automotive Industry
Authors: Bintang G A , Nurcahyo R , Gabriel D S
Published: September 2019

A large number of firms still view the environmental protection as barrier to profitability or as a regulation to comply with rather than fundamental business strategy leading to a sustainable competitive advantage. Another research is argue integrating environmental issues into business strategy can become a strategic opportunity for companies. The capacity to formulate strategy leads to competitive advantage when aligned with the environment. This research aims to examine impact of environmental performance on firm performance. The survey is conducted on automotive companies in Indonesia. Literature study are conducted to obtain criteria of environmental management system, environmental performance and firm performance that will be used as variables in this research. The data is collected using questionnaire and analysed by experts in automotive industry. Pilot test of questionnaire is conducted in this research. The result of this research shows that the questionnaire has good validity and high reliability.
Business Intelligent in an E-Commerce Industry
Authors: Purnamasari A M , Pah C E A , Yoga M D I , Girsang A S , Isa S M
Published: September 2019

According to a survey from statista.com about in 2017, retail e-commerce sales worldwide amounted to 2.3 trillion US dollars and e-retail revenues are projected to grow to 4.88 trillion US dollars in 2021. Each year, e-commerce business increasingly popular. Some retail companies finally decided to focus on internet-based sales to get more customers. Along with transactions that continue to be carried out from year to year, transaction data continues to be stored and stacked and of course space consuming. So after years, Business Intelligence is finally appeared and offer great data processing. Without a business intelligence, these stacked big data are useless and wait to be removed because of poor knowledge. Business intelligence turns on the poor knowledge data into rich knowledge data visualization. This paper proposed a data warehouse that can be used to build a business intelligent with utilize information obtained from the history of transactions. To build up this business intelligent, authors uses methodology steps by Kimball which consists 4 steps of dimensional design process. Furthermore, data analysis will be presented in a dashboard using Power BI.
Implementation Fugl Meyer Assessment of Lower Extremity Method to Develop a Post-stroke Rehabilitation Procedure Using ITS Tricycle
Authors: Febritasari R , Batan I M L
Published: September 2019

Stroke rehabilitation procedure with tricycle is arranged according to health standard especially stroke patients. The procedure consists of vital sign examination, Six Minute Walking Test (6MWT), and Fugl Meyer Assessment of Lower Extremity (FMA-LE). As the implementation of procedure, five respondents of stroke patients who had passed the critical period and are carrying out physical therapy in RSU Haji Surabaya take therapy by using tricycle. The results showed that the respondents have motor function score improvement from low to very good category. While based on fitness, the respondents have improvement of VO2maks capacity from 27.714 mL/(Kg.min) to 29.424 mL/(Kg.min). It can be said that the tricycle has a great meaning for stroke rehabilitation.
Application of Spatial Analysis for Delineating Groundwater Recharge Zone for Industrial Usage in Tanah Bumbu Regency, South Borneo/Indonesia
Authors: Putranto T T , Purba S
Published: September 2019

Population growth in Tanah Bumbu Regency South Borneo Province is causing increased water demand. To fulfil the water needs, the government provides an alternative water resource by using groundwater as a source of fresh water. The objective of this research is to delineate the groundwater recharge zone. The methods were hydrogeological mapping and spatial analysis approach to delineate the groundwater recharge zone. There were six parameters applied in the research, i.e. hydraulic conductivity, rainfall, slope, soil cover, water table depth, and electrical conductivity. The varies of hydraulic conductivity are 45 m/day (sandstone), 0.94 m/day (limestone), 0.49 m/day (alluvium) and 0.2 m/day (serpentinite). Rainfall has a range from 2,106 to 2,403 mm/year. There are several types of soil cover which are gravel, sand pebbles and clay sandstones. The slopes are varying from below 5° to 40°. The groundwater depth is varying from below 5 m to 10 m depth. Furthermore, the electrical conductivity of groundwater samples has a value around 14.9-1,477 μS/cm. Overlying all parameters in spatial analysis resulted in the recharge area spread in the north, centre, and northwest of the study area.
Conceptual Model in Improving Internal Performance of a Company
Authors: Megawati E , Wicaksono P A
Published: September 2019

The purpose of this research to analyze the effect of Internal Supply Chain that influences the Company Operational Performance at PT. AST Indonesia Semarang. Quantitative method was use in this study and the instrument were using Structural Equation Model (SEM). The study involved 100 employees as the questionnaire respondents from 600 employee population that related with internal supply chain such as purchasing, production, incoming quality control, and material preparation. Simple random sampling was use at the quantitative research with proportional quantity of respondent that have taken in every department depend on total employee in each department. By using the result of data analysis, the research conclusion will be the basis for making policy suggestions on implications for the company as well as managerial implications although variables or indicators may find a bad or insignificant influence on the performance of PT. AST Indonesia. This study is expected to provide suggestions for improvements to strengthen the variables or indicators that will be important points that must be monitored and controlled by PT. AST Indonesia to achieve good performance.
Analysing the Success Factors of SMEs on Public Procurement
Authors: Suliantoro H , Winarno B A , Handayani N U
Published: September 2019

Indonesia is catching up with infrastructure development as a developing country. This is an opportunity for large and small contractors, especially construction services to compete for development projects. In the process, the government held a tender for SMEs participating in government projects. In the government tender process there are many obstacles that can affect SMEs to participate and win the government tender process. One of them is more than 50% of the value of tenders under 2.5 billion rupiahs but it cannot be done by choosing directly so that SMEs become difficult to be involved in the government procurement tender process. In this study we will discuss the factors and constraints that affect construction SMEs to participate in public procurement. Factors and obstacles include two main factors, namely the internal SMEs and external factors from the government. The method used is the Partial Least Square analysis method which is doing descriptive statistical analysis and causal analysis that aims to find out whether the factors that influence and become obstacles for SMEs to participate in public procurement.
Integration of Servqual, Kano Model, and QFD to Design Improvement on Public Service System
Authors: Mansur A , Farah A N , Cahyo W N
Published: September 2019

Customer satisfaction can be affected by the quality of service. Based on the results of a preliminary observation, it was found that there were many complaints about quality of service in the “x” sub-district. The aims of this research are to improve quality of service in “x” sub-district with integration of Servqual methods, Kano model, and QFD. In Servqual method, it is assumed that if attributes with low satisfaction score improved, it will improve the consumer satisfaction. However, not all improvement in the attributes of the quality of service will increase the consumer satisfaction. Therefore, the Servqual method will be combined with the Kano method to find the primary attributes to improve according to the relationship to the consumer satisfaction. While QFD is used to determine the priority of improvements. From the research results, there were 14 attributes required to improve and the main priority for improvement is to design official website of “x” sub-district.