bluuebunny/crossref_metadata_2025 huggingface dataset:
Heterogeneous cell performance of polymer electrolyte fuel cell at high current operation: Respiration mode as non-equilibrium phenomenon
Authors: Koizumi Satoshi , Ueda Satoru , Ananda Putra , Tsutsumi Yasuyuki
Published: June 2019

The heterogeneous performance of polymer electrolyte fuel cell in space and time was discussed for operation at high current density. The cell voltage, detected by a segmented electrode, varies along a gas flow channel from upper to bottom stream and oscillates in time, which is referred as a respiration mode. At the higher current, the cell voltage at different positions started to be synchronized, as the current density increases. In order to investigate a role of water on the respiration, we employed a new method of contrast variation for small-angle neutron scattering (SANS) using deuterium (D2) gas as a fuel. By using D2, we introduce special scattering contrast in a polymer electrolyte film (Nafion®), when the film is originally swollen by H2O. After switching from H2 to D2 gas (humidified with H2O), we found that SANS intensity significantly decreases about 40% at the q-position of scattering maximum (qm) originating from the water-microdomains in the polymer electrolyte. After quantitative analyses of the scattering intensity, it was elucidated that 20 wt% of the total water is occupied by D2O as a steady state. At around the average intensity, SANS intensity oscillates with a time interval ∼100sec, which corresponds to the respiration mode found for voltage. The respiration behavior is considered as a non-linear & non-equilibrium phenomenon in an open system, where water flooding plays a role of feedback to decelerate fuel transportation and chemical reaction of water generation.
Design and evaluation of a novel light arc-shaped ultrasonic motor
Authors: Niu Ruikun , Liu Jun , Zhu Hua , Zhao Chunsheng
Published: June 2019

In order to achieve the application of ultra-sonic motors in small pan/tilt/zoom (PTZ), this study designed a light arc-shaped ultrasonic motor where the first-order longitudinal vibration mode and the second-order bending vibration mode were superimposed in the stator plane, in order to drive the rotation of the rotor. The stator was fabricated by phosphorous bronze and piezoelectric ceramic. ANSYS was used to simulate the motor performance in order to optimize its size and determine its operating mode. The motion trail of the end surface of the driving feet was also simulated. The frequency and amplitude of the motor prototype were measured using a three-dimensional (3D) laser vibration meter. The results, which were in good agreement with the simulation results, demonstrated that the prototype exhibited favorable vibration characteristics. The mechanical characteristics of the prototype were also tested. At an operating frequency of 126.5 kHz and an excitation signal of 350Vpp, the maximum rotating speed of the motor reached up to 230 rpm. Finally, the output torque of the motor configurations with single-stator and double-stator were proposed respectively was investigated. The output torque of the motor under the single-stator configuration reached up to 2.6×10-2 N·m, The double-stator which was 1.5 times greater than that under of single stator configuration. Conclusively, the designed motor is characterized by its light weight, high torque, and favorable output performances.
Second type of criticality in the brain uncovers rich multiple-neuron dynamics
Authors: Dahmen David , Grün Sonja , Diesmann Markus , Helias Moritz
Published: June 2019

Significance

Parallel recordings of motor cortex show weak pairwise correlations on average but a wide dispersion across cells. This observation runs counter to the prevailing notion that optimal information processing requires networks to operate at a critical point, entailing strong correlations. We here reconcile this apparent contradiction by showing that the observed structure of correlations is consistent with network models that operate close to a critical point of a different nature than previously considered: dynamics that is dominated by inhibition yet nearly unstable due to heterogeneous connectivity. Our findings provide a different perspective on criticality in neural systems: network topology and heterogeneity endow the brain with two complementary substrates for critical dynamics of largely different complexities.
An endosomal LAPF is required for macrophage endocytosis and elimination of bacteria
Authors: Li Tianliang , Qin Kewei , Li Nan , Han Chaofeng , Cao Xuetao
Published: June 2019

Significance

Host innate immune cells, such as macrophages, can endocytose the invading pathogens and induce inflammatory innate responses to fight infection. In this study, we show that a Cav1-interacting protein, LAPF, promotes the endocytosis of bacteria and production of proinflammatory cytokines by inducing Src-LAPF-Caveolin complex formation in response to innate stimuli. Our results reveal a host defense strategy against bacterial infection by increasing macrophage endocytosis and induction of innate response. We propose that pharmacological activation of LAPF and Src could potentially be applied to the control of bacterial infections.
Explicit and implicit discursive strategies and moral order in a trial process
Authors: Moulinou Iphigenia
Published: June 2019

The present paper examines data which has been drawn from the official proceedings of a murder trial in a Greek court, concerning the killing of an adolescent by a police officer (see alsoGeorgalidou 2012,2016), and addresses the issues of aggressive discursive strategies and the moral order in the trial process. It analyses the explicit and implicit strategies involved in morally discrediting the opponent, a rather frequent defence strategy (Atkinson and Drew 1979;Coulthard and Johnson 2007;Levinson 1979). The paper examines agency deflection towards the victim (Georgalidou 2016), attribution of a socio-spatial identity to the victim and witnesses in an essentialist and reductionist way, and other linguistic and discursive means, the majority of which mobilize moral panic and have implications for the moral order in court. I argue that these aggressive discursive means primarily contribute to the construction of a normative moral order by both adversarial parties.
Creole typology is analytic typology
Authors: Szeto Pui Yiu , Lai Jackie Yan-ki , Ansaldo Umberto
Published: June 2019

This paper reviews a number of specific features typical of analytic languages, in an attempt to investigate whether Creole languages can indeed be grouped, at least structurally, with other languages of the analytic (or isolating) type. Based onSybesma et al. (forthcoming), a study of the nature of analyticity, we select eight features which constitute rather obvious structural parallels between two unrelated groups, namely Sinitic and Kwa. In terms of Creole languages, these eight features can be also clearly located within the APiCS (Michaelis et al. 2013). Contrary to works likeBakker et al. (2011)which argue for the existence of a “Creole Prototype”, our results show that Creole languages do not cluster with each other against other non-Creole languages. Instead, various Creoles clearly owe their grammatical profile to the languages that dominate the typological environment in which they are formed.
The long and short of it
Authors: Nash Joshua
Published: June 2019

Placenames (toponyms) give insight into relationships involving people, place, and language. An exemplary placename derived from long-term engagement within the sensitive linguistic ecology of Norfolk Island in the South Pacific is used to detail how a fusing of linguistic analysis, words, and cultural memory is beneficial for what constitutes an ecolinguistic fieldwork methodology. Differences between the ethnographic method and an ecolinguistic fieldwork methodology are presented. This enduring and keyed-in commitment with Norfolk Island’s social and natural surroundings offers significant perceptiveness into and suggestions about how prolonged ecolinguistic work can be beneficial to language documentation projects, particular those incorporating lexical (word) and semantic (memory) description.
From speaker innovation to lexical change
Authors: Nevalainen Terttu
Published: June 2019

Applying a sociolinguistic approach to the study of neologisms, this paper discusses the actuation and diffusion of new words in Early Modern English (EModE; 1500–1700) and draws some parallels with word coining in the comparable but more recent period of Early Modern Finnish (EModF; 1810–1880). The success of this exercise ultimately depends on the data and tools available for ascertaining the status of neologisms in a broader synchronic and diachronic context. The use of historical dictionaries and digital databases shows that many words that were earlier considered particular innovations in EModE are now up for re-evaluation. Determining their actual moments of coinage and entry into the language may be beyond historical lexicology and lexicography, but the new tools make it possible to better monitor their provenance and process of diffusion over time.
Two types of morphologically expressed non-verbal predication
Authors: Bertinetto Pier Marco , Ciucci Luca , Farina Margherita
Published: June 2019

The morphological expression of non-verbal predication is a geographically widespread, although not very frequent, typological feature. This paper highlights the existence of two radically contrasting types of non-verbal predicative inflection. Construction A has already been described in the literature. It consists of attaching person-sensitive inflection markers to non-verbal predicates, possibly extending this treatment to adverbs and adverbial phrases (locational and temporal), pronouns and quantifiers. This type is well attested in Uralic, Turkic, and Paleosiberian, as well as in some Amazonian language families (most notably Chicham), but it has also been pointed out for some sparse languages of Oceania and Africa. Such non-verbal person inflections diachronically stem from incorporation of conjugated copula elements. Construction B, by contrast, is much rarer and is described here for the first time. It also consists of a dedicated morphological form of the non-verbal predicate (limited, however, to nouns and adjectives), but such form stands out as morphologically lighter than any other form to be found in nouns or adjectives in argument or attribute position. While the latter forms carry some kind of case marker, the noun/adjective predicate merely consists (or historically did) of the word’s root. This type of construction can be found in the small Zamucoan family and still survives in some Tupí-Guaraní languages. Diachronic inspection of Semitic indicates, however, that this predicative strategy was possibly adopted in some ancient varieties, although at later stages it intertwined with the expression of referential specificity. The paper compares the two construction types, highlighting similarities and differences.
CXCR4 regulates Plasmodium development in mouse and human hepatocytes
Authors: Bando Hironori , Pradipta Ariel , Iwanaga Shiroh , Okamoto Toru , Okuzaki Daisuke , Tanaka Shun , Vega-Rodríguez Joel , Lee Youngae , Ma Ji Su , Sakaguchi Naoya , Soga Akira , Fukumoto Shinya , Sasai Miwa , Matsuura Yoshiharu , Yuda Masao , Jacobs-Lorena Marcelo , Yamamoto Masahiro
Published: June 2019

The liver stage of the etiological agent of malaria, Plasmodium, is obligatory for successful infection of its various mammalian hosts. Differentiation of the rod-shaped sporozoites of Plasmodium into spherical exoerythrocytic forms (EEFs) via bulbous expansion is essential for parasite development in the liver. However, little is known about the host factors regulating the morphological transformation of Plasmodium sporozoites in this organ. Here, we show that sporozoite differentiation into EEFs in the liver involves protein kinase C ζ–mediated NF-κB activation, which robustly induces the expression of C-X-C chemokine receptor type 4 (CXCR4) in hepatocytes and subsequently elevates intracellular Ca2+ levels, thereby triggering sporozoite transformation into EEFs. Blocking CXCR4 expression by genetic or pharmacological intervention profoundly inhibited the liver-stage development of the Plasmodium berghei rodent malaria parasite and the human Plasmodium falciparum parasite. Collectively, our experiments show that CXCR4 is a key host factor for Plasmodium development in the liver, and CXCR4 warrants further investigation for malaria prophylaxis.
Information system design using labor productivity measurement for construction
Authors: ‘Azzam Abdullah , Miranda Suci , Indrawati Sri
Published: June 2019

Labor utilization in construction project is the most critical because it costs 30-50% of the total cost. In many projects, the labors e.g craftman are hired outside the company. Contractors and owners need sufficient information related to those labors whom they will work with. It is necessary for clients understanding each labor productivity performance in order to achieve the project quality. This study aims to provide the infomation needed by designing an information system that can be easily accessed. This is also to support clients for decision making in terms of teamwork project involved. The level of productivity is measured by Labor Utilization Rate (LUR) using three variables: effective working time, contributory working time, and ineffective working time. Software Development Life Cycle (SDLC) is applied in designing the information system. The finding showed that information system is properly implemented to assist clients in determining workers using productivity calculation. The system can inform the recommended workers by calculating and sorting their level of productivity that support client’s decision making towards construction workers.
Development of Information Systems as a Means to Improve Sharia Cooperative Services
Authors: Safitri Riri , Haryadi Dody , Sulisthyani Endah , Noorliko Vareza
Published: June 2019

Increasing and empowering the economy of the community is an important thing that is a shared responsibility. This is the basis for the LAZ Al Azhar Empowerment “Sejuta Berdaya” program that makes Jampang Village as one of the target groups in the form of Kelompok Swadaya Masyarakat (KSM) which are named KSM Pelita Jampang Gemilang. The community in Jampang village has a variety of jobs with a low economic level. The foundation provides funding to the community through a sharia microfinance institution that collects and distributes public funds in accordance with Islamic law. The Jampang Sharia Cooperative is still operating manually. Registration process, member information, amount of funds and reports are still done manually and stored in a notebook. This causes the operational process not to run properly, because the data is not organized and stored neatly. Based on these conditions, a financial information system is needed, which is a web-based sharia cooperative, so that the operational processes and reports to members and administrators can run better and faster, so that they can help effectively and on target. Information systems are created using SDLC through the stages of user requirements, analysis and implementation.
Best Concept Selection for Dry-Soybean Cracking Machine Process Optimization using TOPSIS method
Authors: Anugraha R A , Darmawan N M , Iqbal M
Published: June 2019

Tempe is a traditional Indonesian food with processed soybean as the main ingredients. Indonesia is the largest tempe producer in the world with hundreds of thousands of traditional tempe maker. Currently the traditional production process is wasteful that requires the amount of water as much as 1321 liters/production of 37,5 kg tempe. Innovative dry production process is still less desirable because the dry soybean cracker machine is not optimal with a defect of 14,4% per production. In addition, the machine is unable to separate the husk and soybeans from the outlet. There are 12 alternative production concepts to produce highest quality tempe. TOPSIS method was used for selecting best production concept which reduces defect to 6,5% while manual separation process is eliminated. Water consumption is reduced to 800 liters/production of 35,125 kg tempe.
Design of Dust Collector on Sorting Machine Vibro Mesh Type Using Design for Assembly (DFA) Approach with Boothroyd and Dewhurst Method in PT. Perkebunan Nusantara VIII Ciater
Authors: Gulo C A , Rahayu M , Martini S , Kurniawan M I
Published: June 2019

PT. Perkebunan Nusantara VIII is a company that produce orthodox black tea in Indonesia with a land area of less than 400 hectares. In the production section, especially the sorting room in sorting machine, which produces dust contaminants are very disturbing operators who are working. For the maintenance process is scheduled for 2 hours on working hours every 1 month, if maintenance takes more than 2 hours it will cause the production process is delayed. To support the maintenance process on dust collector, Design of dust collector using design for assembly (DFA) aproachp using Boothroyd and Dewhurst method. DFA approach is chosen to simplify the process of maintenance dust collector, which required unloading dust collector every maintenance. There are 2 dust collector designs proposed to get the best assembly design. The design of dust collector with optimal assembly time, with the application of Boothroyd and Dewhurst is design 2 with total component of 82 pieces with assembly time of 552.62 sec with assembling efficiency of 24.43%. It is hoped that by using design 2, the dust collector maintenance process does not interfere with the production process and the shorter time of assembly.
Design of Wood Pellet Trolley using Finite Element Method (FEM) and Design for Assembly (DFA) Approach at PT. Perkebunan Nusantara VIII Ciater
Authors: Putra R R , Rahayu M , Martini S , Kurniawan M I
Published: June 2019

PT. Perkebunan Nusantara VIII is a company produces orthodox black tea. The wood pellets distribution in drying station still uses human power without any tools. The process is done as far as five meters with the transport time of each sack for three minutes and the weight is 30 kg. In the previous research has produced a design that used as reference in this research. The purpose of the research is to provide trolley design by applying Finite Element Method and Design for Assembly approach. The method is chosen because the trolley force should be considered so the trolley has good strength. The initially complex and inflexible designs are expected to be simpler and more efficient. The results of this research are wooden pellet trolleys on handle, platform, frame, and stairs chunk are considered safe from the results of the test. While the wheels chunk need to be re-election of material into titanium alloy because it is considered unsafe based on the test results. Then the design of wooden pellet trolleys results in a higher assembly efficiency rating of 27.77% with 127 total components and total processing time of 928.98 seconds so it can be concluded better than reference design.
The Design of Material Transporter for Paper Sack in Packaging to Decrease The Risk of Muscoloskeletal Disorders using Ergonomic Function Deployment (EFD) Approach: A Research at PT. Perkebunan Nusantara VIII Ciater, West Java
Authors: Kurniawan M I , Rahayu M , Martini S
Published: June 2019

The Tea packaging paper sack process at PT. Perkebunan Nusantara VIII is done manually using human labor to lift paper sack weighing 40-60 kg. This condition makes it harder for the labor and increases the risk of Musculoskeletal Disorders (MSDs). In the existing condition, the RULA score is seven which have high risk of work accidents. To minimize the risk of MSDs, a proposed work tool is designed using the Ergonomic Function Deployment approach to produce ergonomic tools. The proposed work tool was developed with the ESHCE principle (Effective, Safe, Healthy, Comfortable, and Efficient) which became a variable in meeting the Ergonomic Function Deployment (EFD) approach. The research results showed that the proposed work tools could help workers in carrying out packaging activities with the decrease in the RULA value on the labor’s posture and could reduce processing time because it united all activities in the packaging area. So it can be concluded that the proposed work tools can reduce the risk of MSDs and can help workers to process the packaging of tea with minimum time.
Selection process of sustainable production indicators using eco-quality function deployment
Authors: Pusporini Pregiwati , Vanany Iwan
Published: June 2019

Sustainable production has to become a necessity for all industries for last decades. While the industry has to improve the quality of the product, they also need to consider three essential indicators (economic, social and environment). To concern for sustainable production, there are many indicators that can be set. Every industry may have different indicators with others depends on their policy, goal, and circumstances. The objective of this research is to propose a practical approach to determine appropriate sustainable production indicators. The selection process of sustainable production indicators will be challenging. The proposed method used a framework of eco-quality function deployment. The construction of house of quality in this concept is derived from three main perspectives of sustainable development such as, economic, social and environment. The assessment of eco-quality function deployment involves expert judgments. The linguistic terms in fuzzy concept is applied. The result showed that the combination of fuzzy eco-QFD could be a useful tool for the selection process of sustainable production indicators that is flexible enough to be modified and can accommodate many varieties of indicators.
Designing technical specifications for goyor woven fabric as material for civil servant official uniforms using quality function deployment and conjoint analysis
Authors: Refinda D , Liquiddanu E , Suletra I W , Sutopo W , Budijanto M
Published: June 2019

Sragen regency has a traditional woven fabric called goyor woven, whose presence is disappearing. One way to revive its existence is to encourage its use as the material for official uniforms of Sragen civil servants. For this purpose, there is a need to research the most preferable design of the goyor woven fabrics by the civil servants. The aim of this research is to determine the technical specifications of the goyor woven fabric by combining the characteristics of the goyor fabric and the preferences of Sragen civil servants. The method used is integrated QFD with conjoint analysis. QFD is used to translate consumer voices into technical specifications while conjoint analysis is used to find the best combination of the proposed goyor woven fabric design with the technical specifications. The initial result of the research indicates that the technical specifications of the goyor fabric design that is formed are red and blue fabrics with floral and geometric patterns. Based on conjoint analysis the option that best suits the preferences of Sragen civil servants is the combination of blue goyor fabric with geometric pattern.
Empowering product development through creative culinary house design
Authors: Prasetyawan Y , Suef M , Supriyanto H , Wardani I O K
Published: June 2019

The existence of creative culinary houses with thematic besides culinary has attracted a lot of public attention. In the business balance between supply and demand, sharpness of analysis is needed to see the potential on both sides. Although the supply of culinary business has been very numerous and varied in the city of, analysis of how to build a unique product and find a niche that can still be penetrated is very important. Culinary developments around ex-lokalisasi area are still limited to products that have been developed in the community such as crackers, chips, seaweed and the like. The superior products that are in demand by the community and have great potential are various heavy and light foods that can be consumed in daily life to get enough sales potential and business sustainability. The community gives a positive appreciation in the question of perception about the existence of culinary houses and gives positive interest to become consumers, but some still have negative perceptions about the ex-lokalisasi area and expect the stigma to be lost. In the perception as a producer, the public still doubts the potential for marketing and sales success and the limitations of the place. It is expected that this creative culinary house can have relationships with various other economic centers in the city.
Usability Testing of Laboratory Website using a Participatory Design Approach
Authors: Firdaus S , Sari A D , Suryoputro M R , Khasanah A U
Published: June 2019

Website is one of supporting facilities that used by universities as communication and marketing media. The Industrial Modelling and Simulation Laboratory website is one of the academic websites at the Islamic University of Indonesia. There are still problems found on the website such as not uniform display content, less attractive appearance, complex navigation and too many link layouts. It was indicated that the website has not been easy and effective to be used so that an evaluation and usability testing needs to be carried out to improve the function of the website. The research method used was participatory design, performance measurement and usability scale (SUS) system questionnaire. The purpose of this study was to determine the results of evaluation based on participatory design and the level of usability on the proposed website. The evaluation process identifies problems and suggestions for improvement through 2 iteration stages to produce a proposal design. In the process of usability testing the proposed website shows that the proposal for a new laboratory website has an effectiveness level of 78%, an efficiency level of 76% and a satisfaction level of 74% with excellent categories.
Ergonomic risk and work load analysis on material handling of PT. XYZ
Authors: Widodo L , Daywin F J , Nadya M
Published: June 2019

In Indonesia, some industries do manual work using human labor. Among other things is the process of raw materials handling. Likewise, this happened to PT XYZ, which has not used a tool in the material handling process. The material are steel plates and wood plates. This study aims to determine the physical complaints felt by workers, determine the workload classification, and analyze the work posture of workers. In accordance with the results of the Nordic Body Map questionnaire, there are complaints from workers, especially pain in the upper neck, pain in the left and right shoulder, pain in the left upper and right upper arm, backpain, low back pain, left and right forearm pain, left-right wrist pain, and right and left hand pain. Based on Rapid Entire Body Assessment (REBA) and Workplace Ergonomic Risk Assessment (WERA) analysis, all activities of carrying steel plates and wood plates are categorized as medium. Based on Ovako Working Posture Analysis System (OWAS), the elements of work that require immediate action are Taking Plate (Wood) and Carrying the Plate (Wood). The results of the calculation of energy consumption obtained by 5.94 kcal / minute and categorized as work heavy / heavy work (5.0 - 7.5 kcal / minute). Workers carr plates with a weight of 30 to 42 kg, while according to NIOSH Equation and Snook Table analysis the maximum load is 14.06 kg, so this is far beyond and dangerous.
Analysis daily newspaper distribution in Solo by Agent Based Simulation
Authors: Febriandini Izatul Fitria , Yuniaristanto  , Sutopo Wahyudi , Hisjam Muhammad
Published: June 2019

Agent based simulation is a simulation model that can be used to describe the interaction between the involved agents. The interaction is generated from observations of human behavior. This study aims to provide an overview of business process PT Aksara Solopos and involved agents in it, especially for Koran Harian Solopos. In addition, to cope with the large number of paper returns is estimating the newspaper demand by simulation. Simulations done using NetLogo 6.0.3 applications. This research produced the number of clients who are subscribed by newspaper deliveryman and daily stock for the company, newsagents, newspaper deliveryman to complete the consumer demand.
Multi Responses Optimization for the Sugar Content and Microbial Impurities of Carrot Syrup
Authors: Isabella O , Ekawati Yurida
Published: June 2019

Carrots are one type of agricultural products with large quantities in Indonesia. One of the carrot based products is carrot syrup. To determine the optimal process and composition of the carrot syrup, design of experiment using Taguchi method was carried out. This research have focused to optimize the carrot syrup with multiple quality using multi response Taguchi method based on the average quality losses. The quality dimension used are the sugar content and microbial impurities of the carrot syrup. The two quality dimensions have different responses, larger the better for sugar content and smaller the better for microbial content mold and yeast. The parameters determined to optimize the product quality dimensions are the duration of heating and the amount of sugar. The result of the optimal process and composition of carrot syrup is the duration of heat for 30 minutes and the amount of sugar of 210%.
Design of Job Scheduling System and Software for Packaging Process with SPT, EDD, LPT, CDS and NEH algorithm at PT. ACP
Authors: Gozali L , Kurniawan V , Nasution S R
Published: June 2019

PT. Avesta Continental Pack is a manufacturer of flexible packaging for pharmaceutical products. The company faces ineffective production scheduling and repeatedly failed to finish orders at the expected time limit. Customers requesting orders in different finishing time contributes in causing delays in the delivery process. Consequently, customers ended up claiming the fee because of the late delivery. Therefore, a more advanced scheduling system will assist the company in managing the delivery time. The purpose of this research is to establish the most effective job scheduling arrangement to minimize mean tardiness as well as mean lateness job. As the production process uses flow shop method, this research applies heuristic methods, such as Earliest Due Date (EDD) method, Short Processing Time (SPT), Nawaz, Enscore, and Ham (NEH) algorithm and Campbell, Dudek, and Smith (CDS) algorithm. The result shows that SPT method provides the most optimum outcome, specifically by reducing mean tardiness by 801.81 minutes or 85.57% and decreasing mean lateness job by 2 or 66.67%. The best job sequence is subsequently job 8 - job 4 - job 1 - job 6 - job 7 - job 5 - job 2 - job 3, which minimizes the average delay time from 937.05 minutes to 135.24 minutes.
Inventory Level Optimization of Raw Materials for Ready-Made Garment Industry XYZ Pty Ltd using Mamdani Method of Fuzzy Interference System
Authors: Nurhasanah N , Fauzia SW , Aribowo B , Safitri R , Samiono B , Lutfia CF , Devana M , Kalifa P , Supriyanto A
Published: June 2019

Every company who performs production activities needs inventory of raw materials. The most important thing which is mandatory for all companies when performing their production activities is management of inventory, as inventory is an asset for a company. Availability of raw materials in the industry is expected to facilitate production/service activities to meet consumer needs. Ready-made garment industry, XYZ Pty Ltd is a family business established in 2004 located in Jakarta which engages in textile manufacture and has shown a relatively high demand. While XYZ Pty Ltd attempted to meet the demand, the inventory level was not able to balance with it, resulting in after-hour work of employees. In order to provide appropriate solutions, we proposed some strategies using Mamdani method and TFN (Triangular Fuzzy Number) range which selected appropriate rules to optimize inventory level of the company. Average of range score Fuzzy Interference System obtained for both production level and demand level were 36,500, while average of range score Fuzzy Interference System obtained for Inventory Cost and Inventory Level were 2,250,000,000 and 13,900, respectively. Rules resulting in a high inventory level are very good for use either together with other levels or not. Rules resulting in an intermediate inventory level are also good for use, in particular together with low and intermediate demand levels. Rules resulting in a high demand level are still good for use. On the other hand, rules resulting in a low inventory level are not good for use.
Line Balancing Application Analysis of Generator Manufacturing Process in DPG Inc.
Authors: Alif¹ S. , Aribowo² B.
Published: June 2019

Every company always try to fulfill their customers’ demand in order to gain maximum profit with minimum cost. To achieve that, company needs to pay attention to all aspects of the industry from upstream to downstream and create an integrated system so all processes can run effectively and efficiently. One important aspect that needs to be considered closely is production time. Company have to ensure that the production activity can be done within the time target so customers can get the right product in the right time. In the production floor, the balance of production lines is effecting the efficiency of production process. This research measures the efficiency of a manufacturing process in a generator company (DPG Inc.) based on its production time. Then, line balancing is applied to the generator manufacture line using RPW, J-Wagon, and LCR method to know the comparison of efficiency before and after line balancing applied. Based on the line efficiency, smoothness index and balance delay obtained, the best line balancing method to use in the generator manufacture line is LCR. The result is the generator manufacture line is more efficient after line balancing applied, especially using LCR method.
Design of Computer Aided Process Planning System for Holster Mold at PT. Carnegie Universal Industries
Authors: Witonohadi Amal , Sutisna Nanang Ali , Naibaho Martulan Suryanto
Published: June 2019

PT. Carnegie Universal Industries manufactures holster products and magazine carrier. Holsters have the most variants and the highest demand. To produce a holster, a mold is needed for each type of handgun. A mold uses wooden mold and blue gun. Mold making takes the longest time compared to other stages in the holster production process. The mold making process does not yet have standards, therefore it takes a long time and high cost. The purpose of this study is to develop a process planning to facilitate the making of molds with automated systems using the Computer Aided Process Planning (CAPP) method, speed up production time, and reduce production costs. The CAPP generative approach is generated through decision logic, formulation, search, algorithm and geometric based data. Database programs are created to store detailed information on each print that has been created. This approach design proved that the mold making procedures are simplified and speeded up and have standards, so that the time and costs are used more effectively and efficiently.
Job Scheduling for Hybrid Assembly Differentiation Flow Shop to Minimize Total Actual Flow Time considering Multi-Due-Dates
Authors: Maulidya R , Suprayogi  , Wangsaputra R , Halim AH
Published: June 2019

The hybrid assembly differentiation flow shop is a three-stage flow shop system with machining, assembly and differentiation stages. The machining stage produces k parts in independently unrelated dedicated machines. After k parts of a job completed, they are assembled at the assembly stage and assigned to dedicated machines for a final process. At the end, several types of finished products are resulted. The finished products should be delivered at their respective different due dates. The problem is to find a schedule considering multi due dates, and the criterion of minimizing total actual flow time. This paper proposes a model for job scheduling in a hybrid assembly differentiation flow shops and its algorithm for solving the problems. The initial solution is defined using SPT-based heuristic and it is optimized using variable neighbourhood descend method. The proposed model is tested using a set of hypothetic data. The solution shows that the algorithm can solve the problems effectively.
The Pattern Failure Analysis of Sulfuric Acid Production Process with the Association Rules Algorithm Apriori
Authors: Septiani W , Marie I A , Sugiarto D , Hakim L
Published: June 2019

PT. Asam Sulfat is industrial Sulfuric Acid that was able to meet the needs of most battery manufacturers in Indonesia. Problems in production operations were mostly caused by production equipment, such as engine stop suddenly, length of set up and adjustment time and decrease of machine production speed. These results caused a decrease level in the efficiency and effectiveness of the engine. This study aims to identify and analyze the machine and components that dominate the sulfuric acid production process damage. The method of analysis used is the Association Rules Algorithm Apriori. Based on the results of initial identification obtained 23 machines and 9 components are often damaged. The variables analyzed include unit, machine type, component, time to repair and turbidity. Using a minimum value of support 0.1 and confidence 0.9 resulted in 17 rules dominated by low turbidity, especially in AT Pump engines and Gasket components. The High turbidity occurred in patterns with the Ash Pump component, The Time to Repair was high and it happened on the Sulfur Pump engine. By knowing the patterns that occurred absolutely the failure in the production process can be more quickly handled.
Design of Flat Shoes Quality Control System using PDCA (Case Study at PT DAT)
Authors: Sari D K , Hetharia D , Saraswati D , Marizka R
Published: June 2019

The D’Arcadia Treasure (DAT) is a Small and Medium Enterprises (SME) that made shoes from traditional Indonesian fabrics. The research objective is to design a structured and documented quality control system to make companies easier to control the production process according to the quality standards desired by consumers. The initial stage is to identify of DAT’s Critical to Quality that will be the basis for compiling a Quality Plan, then using Statistical Process Control method for the control process and Cost of Quality identification. The results of the initial condition analysis are known there are 5 stages of the main process of making flat shoes as the object of research, namely spraying, pattern making, sewing, assembly, and finishing. Furthermore, the quality control system is designed to be divided into 3, namely raw material receipts, production processes, and finished goods equipped with quality control tools checksheet tables and instructions for use. The results of the implementation and analysis of Failure Mode Effect Analysis obtained the highest RPN value of 224 in the assembly process. The entire series of control processes are carried out with the Plan Do Check Action procedure which is a continuous cycle to be implemented in the company.
Assistance Program for the Implementation of ISO 9001 2015: Case Study of Telkom Junior High School
Authors: Rohayati Y , Sari K
Published: June 2019

Yayasan Pendidikan Telkom is one of the educational foundation that houses several of private education institutions ranging from elementary, secondary, to higher education. The foundation constantly improves the quality of education services as the most important component in carrying out institutional operations in order to always gain the trust of prospective students and the community. The efforts of the educational institutions to improve the quality of services, one of them by implementing a quality management system that refers to the latest edition of ISO 9001. Telkom Junior High School is one of the educational institutions that will now begin to implement ISO 9001: 2015. The teachers and school staff experience many obstacles in preparing to face the implementation of the quality management system. With the exploratory research approach, this study aims to produce an assistance model and describe the stages that will be passed by educational institutions in preparing their institutions to face ISO 9001: 2015. This research is the initial stage of studies that will be conducted and will be more focused on the preparation stage, while the discussion of the implementation phase will be carried out in future research. This assistance model is designed to help educational institutions to implement ISO 9001: 2015 according to plan, and especially so that the preparation process takes place quickly and directed.
Analysis of Increasing Quality of Surfactant Powder at Oversize Parameter Using PDCA and FMEA in PT BCCI
Authors: Prasetyani R , Huda A T , Ningtyas D R
Published: June 2019

Quality of product is the important thing for PT BCCI in order to compete with other chemical industry of surfactant. In the production process of surfactant powder the particle size of the product is bigger than screener with mesh size 30 will produce oversize reaching 30% from every batch of products, indicates there is an issue that to be fixed immediately. This research was to find out the root of problem and action to improve the quality product and increase the output. PDCA and FMEA method were used to resolve these problems. The results are priority problem that needs to be improved based on the highest RPN value is the machine on the product evaporation system is the less working Vacuum maximum and the product temperature is less high. The product temperature need increase to 60ºC which was previously 58ºC and pressure on Vacuum <50 mbar. After improvement was applied the results obtained where the value of Cpk increased from 0.163 in the previous study to 3.609 and Oversize decreased from 30% to 20% in each batch process, this is in accordance with the target to be issued with the Oversize percentage below 30% in each process.
Quality and Reliability Engineering in Service Industry: A Proposed Alternative Improvement Framework
Authors: Hadiyat M A , Wahyudi R D , Sari Y , Herowati E
Published: June 2019

Quality and reliability engineering technique are widely used as improvement tools in manufacturing industries, involving the design experiments, quality function deployment (QFD), and survival analysis, focuses on improving the lifecycle of products. However, started at early last decade, some researches in improving the service lifecycle in some service industry consider to implements design of experiment in service industry, followed by other tools such as QFD, and the reliability engineering tools. This research proposed alternatives incorporated quality and reliability engineering methods in evaluating and improving the lifecycle of service. Starting with evaluating the weaknesses of service using SERVQUAL method, finding the improvement plan by implementing QFD, designing the robust service design using Taguchi designed experiment methods, and then implementing survival analysis for ensuring the reliability of designed services. This framework has successfully implemented in designing and evaluating existing airport service system with some recommendation generated in.
Measuring Acceptance Level of Online Service for Business Permit in Surabaya using Technology Acceptance Model
Authors: Ronyastra I M , Gunawan  , Muhammad E K
Published: June 2019

Surabaya is known nationally as the pioneer of e-government in Indonesia, as time goes Surabaya’s e-government started to provide online services for permits and licenses. One of the service that they provide is business license known as Surat Izin Usaha Perdagangan/Tanda Daftar Perusahan (SIUP/TDP). With this service, citizens are able to take care of such licenses online. This research discussed about citizen’s level of acceptance of the online service and identifying factors that influence the acceptance of online SIUP/TDP in Surabaya using Technology Acceptance Model (TAM). The factors that influenced the acceptance level were measured through questionnaire survey for 100 respondents who already experienced the service. The data is then analysed through structural equation modelling (SEM). The result shown that 8 of 9 hypotheses are failed to be rejected. Three solutions can be proposed to improve the level of acceptance of the service namely: animated guidance, better socialization campaign, and scheduled site maintenance.
Value Engineering Towards the Design of Bread Production Process Tools
Authors: Bidiawati Ayu , Kholidasari Inna , Elani Bintang Manggala
Published: June 2019

In a bakery, an operator needs a working tool for bread production process. To avoid injury and inconvenience the tool should be suitable and appropriate for the operator’s body posture and workload. Operators’ assistive device produced is trolley rack. Value engineering approach is carried out on this tool to identify and develop its functions in achieving the balance among cost, reliability and appearance of the product. The work-plan is divided into several development stages: creative stage, analysis stage, development stage and recommendation stage. Product value is determined by comparing between product benefits and product costs. This study employs Function Analysis System Technique (FAST) method which consists of 5 stages, namely information, creative, analysis, development and presentation/recommendation stages. The recommendation stage explains the best alternative design. The results show that alternative II has the highest performance value which is 97.16 and the highest rating of 0.45. It is rated as the best design and has good product durability.
Effects of cocoa clones and fermentation times on physical and chemical characteristics of cocoa beans (Theobroma cacao L.)
Authors: Assa A , Rosniati  , Yunus M R
Published: June 2019

The effects of cocoa clones and fermentation time on the physical and chemical characteristics of cocoa beans has been examined. This study used cocoa pods of superior clones, namely Sulawesi 1, Sulawesi 2, and MCC 02 clones cultivated in East Luwu, South Sulawesi, Indonesia. Prior to the fermentation, the mature cocoa pods were stored for six days. Fermentation took place for 24, 48, 72, 96, and 120 hours using fermentation boxes made of styrofoam with the capacity of box is 7 kg of wet beans. The drying of the cocoa beans used sun drying method. The results showed that the interaction between fermentation time and type of clones have significantly affected moisture content, proportion of cocoa nibs and shells, and fat content; but the interaction of the both had no significant effect on pH of cocoa nibs and FFA content. In general, the Sulawesi 2 clone had better physical and chemical characteristics than those of the Sulawesi 1 and MCC 02 clones.
Development of vendor management and e-Procurement systems using android platform
Authors: Angrian B , Sahroni T R
Published: June 2019

Supply chain management has become a crucial aspect of the performance of industries and companies as it manages the flow of goods, services, and information in order to fulfil customers need while reducing the total costs. In order to reduce the production total cost, e-procurement is introduced. E-procurement means of reducing cost is by shortening cycle time and create a simpler procurement process. The aim of this research is to develop a vendor management and e-procurement system using the Android platform. The developed system is hoped to be able to even shorten the cycle time, ease vendor selection and provide a more flexible and convenience procurement process. Through data measurement and documentation review, the developed system was tested against these three parameters for their validity. In the end, this research summarizes the test result and conclude based on the test result that those parameters are achieved in the developed vendor management and e-procurement system.