bluuebunny/crossref_metadata_2025 huggingface dataset:
A Study of Social Media Utilization by Individuals With Tinnitus
Authors: Deshpande Aniruddha K. , Deshpande Shruti Balvalli , O'Brien Colleen
Published: September 2018

Purpose

As more people experience tinnitus, social awareness of tinnitus has consequently increased, due in part to the Internet. Social media platforms are being used increasingly by patients to seek health-related information for various conditions including tinnitus. These online platforms may be used to seek guidance from and share experiences with individuals suffering from a similar disorder. Some social media platforms can also be used to communicate with health care providers. The aim of this study was to investigate the prevalence of tinnitus-related information on social media platforms.

Method

The present investigation analyzed the portrayal of tinnitus-related information across 3 social media platforms: Facebook (pages and groups), Twitter, and YouTube. We performed a comprehensive analysis of the platforms using the key words “tinnitus” and “ringing in the ears.” The results on each platform were manually examined by 2 reviewers based on social media activity metrics, such as “likes,” “followers,” and “comments.”

Results

The different social media platforms yielded diverse results, allowing individuals to learn about tinnitus, seek support, advocate for tinnitus awareness, and connect with medical professionals. The greatest activity was seen on Facebook pages, followed by YouTube videos. Various degrees of misinformation were found across all social media platforms.

Conclusions

The present investigation reveals copious amounts of tinnitus-related information on different social media platforms, which the community with tinnitus may use to learn about and cope with the condition. Audiologists must be aware that tinnitus sufferers often turn to social media for additional help and should understand the current climate of how tinnitus is portrayed. Clinicians should be equipped to steer individuals with tinnitus toward valid information.
CNN‐based UGS method using Cartesian‐to‐polar coordinate transformation
Authors: Kim B.‐S. , Sun J.‐Y. , Kim S.‐W. , Kang M.‐C. , Ko S.‐J.
Published: September 2018

The main concern of user‐guided segmentation (UGS) is to achieve high segmentation accuracy with minimal user interaction. A novel convolutional neural network (CNN)‐based UGS method is proposed, which employs a single click as the user interaction. In the proposed method, the input image in the Cartesian coordinate system is first converted into the polar transformed image with the user‐guided point (UGP) as the origin of the polar coordinate system. The transformed image not only effectively delivers the UGP to the CNN, but also enables a single‐scale convolution kernel to act as a multi‐scale kernel, whose receptive field in the Cartesian coordinate system is altered based on the UGP without any extra parameters. In addition, a feature selection module (FSM) is introduced and utilised to additionally extract radial and angular features from the polar transformed image. Experimental results demonstrate that the proposed CNN using the polar transformed image improves the segmentation accuracy (mean intersection over union) by 3.69% on PASCAL VOC 2012 dataset compared with the CNN using the Cartesian coordinate image. The FSM achieves additional performance improvement of 1.32%. Moreover, the proposed method outperforms the conventional non‐CNN‐based UGS methods by 12.61% on average.
The extraordinary composition of the blue comet C/2016 R2 (PanSTARRS)
Authors: Biver N. , Bockelée-Morvan D. , Paubert G. , Moreno R. , Crovisier J. , Boissier J. , Bertrand E. , Boussier H. , Kugel F. , McKay A. , Dello Russo N. , DiSanti M. A.
Published: September 2018

We present a multi-wavelength study of comet C/2016 R2 (PanSTARRS). This comet was observed on 23 and 24 January 2018 with the IRAM 30 m telescope, and in January to March 2018 with the Nançay radio telescope. Visible spectroscopy was performed in December 2017 and February 2018 with small amateur telescopes. We report on measurements of CO, CH3OH, H2CO and HCN production rates, and on the determination of the N2/CO abundance ratio. Several other species, especially OH, were searched for but not detected. The inferred relative abundances, including upper limits for sulfur species, are compared to those measured in other comets at about the same heliocentric distance of ~2.8 AU. The coma composition of comet C/2016 R2 is very different from all other comets observed so far, being rich in N2 and CO and dust poor. This suggests that this comet might belong to a very rare group of comets formed beyond the N2 ice line. Alternatively, comet C/2016 R2 (PanSTARRS) could be the fragment of a large and differentiated transneptunian object, with properties characteristic of volatile-enriched layers.
Chemical profile and antioxidant potential of four table grape (Vitis vinifera) cultivars grown in Douro region, Portugal
Authors: Mota Ana , Pinto Joana , Fartouce Ivo , Correia Maria José , Costa Rui , Carvalho Rosa , Aires Alfredo , Oliveira Ana Alexandra
Published: September 2018

The aim of this work was to improve the knowledge about the potential of Douro region (North of Portugal) to produce table grapes of superior quality. Skin, pulp, and seeds of four table grapes ‘Alphonse Lavallée’, ‘Cardinal’, ‘Dona Maria’ and ‘Muscat Hamburgo’ produced in Dour region, collected at commercial maturity stage, were evaluated. Phenolic compounds, organic acids and sugars were determined in each cultivar and in the different parts of the grape by HPLC-DAD, while the antioxidant properties were evaluated by DPPH, Cuprac and lipid peroxidation assays. Phenolics from different classes were found: four anthocyanins (delphynidin, cyanidin, petunidin and malvidin), two hydroxibenzoic acids (gallic acid and protocatechuic acid), three hydroxycinnamic acids (caffeic, chlorogenic and coumaric acids), one flavonol (rutin), three flavan-3-ols ((+)-catechin, (-)-epicatechin, and (-)-epicagallocatechin)), one oligomer (procyanidin B2) and one stilbene (resveratrol). In addition, three organic acids (tartaric, malic and citric acids) and two types of sugars (glucose and fructose) were detected in all samples. Differences were found between cultivars (p<0.001) and sample material type (p<0.001). Skins presented the higher content in anthocyanins, seeds in flavan-3-ols and pulps in phenolic acids, organic acids and free-sugars. The cultivar ‘Cardinal’ showed the highest content in phytochemicals, while ‘Dona Maria’ was the cultivar with the lowest content. Nonetheless, the content of flavan-3-ols and organic acids in ‘Dona Maria’, associated with its higher antioxidant capacity, makes it an interesting choice as table grape from healthier point of view. According to our results, Douro region have proper environmental conditions to produce these table grapes.
Comparison of active and passive EMI filters to reduction conducted noise
Authors: Pasko Marian , Szymczak Marek
Published: September 2018

The article presents the results of experimental studies of passive and active EMI filters for reduction of conducted noise. Firstly, the article presents selected structures of passive filters that have been tested in terms of insertion loss parameter describing their efficiency. Then, active filters were used to improve the efficiency of insertion loss of passive filters under the same conditions. Finally, the results and conclusions are drawn from the measurements of both types of filters for the reduction of conducted noise.
Optimisation of additional coils of a vibration energy harvester using interior point algorithm
Authors: Kulik Marcin , Jagieła Mariusz , Baron Bernard
Published: September 2018

The paper aims at applying the interior point algorithm in optimisation of additional coils of a small resonant electromagnetic vibration energy harvester. The system, which consists of a coreless microgenerator is driven by external vibration through a cantilever-beam spring element. Originally, the system contains only one coil mounted centrally between the moving magnets. It was found that the very low induced voltage can be significantly increased by exploitation of leakage flux outside the magnets using additional coils, whose are optimised for maximum voltage.
Optimization of the eddy current transducer using COMSOL Multiphysics® and MATLAB® software
Authors: Dudziak Konrad , Stawicki Krzysztof , Brykalski Andrzej
Published: September 2018

The article presents a method of optimizing the eddy current transducer. The transducer is made of three toroidal air cored coils: one excitation coil and two receiver coils. The transducer is used for eddy current nondestructive testing (NDT).
The effects of LED light sources on the parameters defining the quality of electricity
Authors: Lange Andrzej , Pasko Marian
Published: September 2018

The article presents the regulations and standards relating to the quality of electricity, with special emphasis on higher current and voltage harmonics in high-voltage, medium-voltage and low-voltage power grids and the power factor (PF). The parameters defining the quality of electricity consumed by modern LED bulbs for lighting homes, industrial premises such as offices and production halls, as well as roads and yards were measured and analyzed. The current waveforms for LED lights were presented upon connection to the power grid.
Learning algorithm analysis for deep neural network with ReLu activation functions
Authors: Płaczek Stanisław , Płaczek Aleksander
Published: September 2018

In the article, emphasis is put on the modern artificial neural network structure, which in the literature is known as a deep neural network. Network includes more than one hidden layer and comprises many standard modules with ReLu nonlinear activation function. A learning algorithm includes two standard steps, forward and backward, and its effectiveness depends on the way the learning error is transported back through all the layers to the first layer. Taking into account all the dimensionalities of matrixes and the nonlinear characteristics of ReLu activation function, the problem is very difficult from a theoretic point of view. To implement simple assumptions in the analysis, formal formulas are used to describe relations between the structure of every layer and the internal input vector. In practice tasks, neural networks’ internal layer matrixes with ReLu activations function, include a lot of null value of weight coefficients. This phenomenon has a negatives impact on the effectiveness of the learning algorithm convergences. A theoretical analysis could help to build more effective algorithms.
Calculation of energy loss due to macroscopic eddy currents in ferromagnetic materials considering hysteresis loop
Authors: Bereźnicki Michał , Jabłoński Paweł
Published: September 2018

The paper presents an algorithm for calculating the energy loss due to macroscopic eddy currents considering the non-linearity of magnetization characteristics and magnetic hysteresis. It was found that for non-oriented steel sheet with a silicon content of 6.5% and thickness 0.1 mm the consideration of non-linearity and magnetization characteristics has a little effect on the energy loss, at least up to 400 Hz. In the application of the algorithm, there are some limitations resulting from the assumption of the average value of the induction flux in the sample cross-section, numerical problems and hysteresis loop shapes.
Influence of defect in an excited steel plate on the results of time-frequency analysis
Authors: Dobrzycki Arkadiusz , Knitter-Piątkowska Anna
Published: September 2018

The paper pertains the use of non-invasive diagnostic methods to assess the condition of metal elements of machinery and equipment or metal components of building structures. The conducted research concerns the analysis of acoustic signals generated during the excitation of a steel plate and the influence of discontinuities such as grooves and apertures in its structure on spectrogram of recorded acoustic emission signals. Since the presence of the opening causes a significant increase in the initial phase of the acoustic event, higher frequencies (20-55 kHz) and faster decay of the signal, so it should be noted that the frequency analysis of recorded signals, in the initial phase of the acoustic event, can be considered as an indicator of the damage presence.
Grid conected inverter for alternative sources of energy
Authors: Porada Ryszard , Gulczyński Adam
Published: September 2018

The general characteristic of power electronic couplers for alternative energy sources with electrical power grid was presented. The power electronic current source, working as a closed loop system, generating sine wave shaped current transfering the energy to the grid was discussed. The chosen results of simulation model of such system for sinusoidal reference signals were presented. The test results of the laboratory prototype were also presented.
Influence of electric vehicles on the electrical grid
Authors: Kasprzyk Leszek , Pietracho Robert
Published: September 2018

The article discusses the issue of the development of electric energy storage and their impact on the power grid on the example of a charging station, to which a group of vehicles that have the capacity to transfer energy to the grid (V2G) is connected. An exemplary simulation of power distribution, energy losses in nodes of a standard IEEE 5 type network in two variants is presented: without and taking into account the impact of charging and discharging to grid the electric vehicles. The obtained results of power distribution in individual network nodes and power losses are presented in diagrams and commented.
Use of cross-compiling in the programming of an intelligent device for measuring electrical quantities
Authors: Przybylski Jakub , Idziak Paweł
Published: September 2018

A device for voltage and direct current measurement, built by coupling a Raspberry Pi microcomputer with an Arduino series microcontroller is presented in this paper. The structure of the device is presented and the method of implementing proprietary programs for both devices is described. A touch screen of the device allows the user to decide on the measurement mode (automatic or manual) and on the method of archiving and visualizing the effects of measurements. The application uses the so-called cross-compiling, thanks to which it is possible to effectively couple such different platforms as Raspberry Pi and Arduino.
Forecasting long term lumen maintenance of LED lamps
Authors: Zalesinska Malgorzata , Zablocka Julita , Wandachowicz Krzysztof , Raczak Agata
Published: September 2018

Due to the very high life of LED lamps, amounting to tens of thousands of hours, the life declared by the manufacturer is most often life determined on the basis of the method of forecasting the long term lumen maintenance. Life forecasting is based on operational measurements of the luminous flux drop over a period of at least up to 6000 h every 1000 h and extrapolation of the obtained results with an appropriate exponential curve. The article presents the results of measurements of luminous flux changes in the range of 0 to 9000 h of operation of light sources. The analysis of the obtained results was carried out and the life of the tested lamps was estimated.
Developments of next generation refrigerants and heat transfer
Authors: Miyara Akio
Published: September 2018

Since the effect of refrigerants which are widely used in heat pump and refrigeration systems on the global warming has become a big environmental issue, researches and developments on the next generation refrigerants are being conducted intensively. Values of global warming potential (GWP) of most of currently used refrigerants are grater than 1000. R32 which becomes popular as a refrigerant of domestics air-conditioners for years has GWP=675. Recently, some hydrofluoroolefins (HFOs) are getting attention and their thermophysical properties and heat transfer characteristics are being clarified experimentally because GWP of HFOs are very small in which the values of some HFOs are less than 1 and those of others are less than around 10. For example, R1234yf and R1234ze(E) are promising candidate of R134a. In this paper, recent developments of the next generation refrigerants and its heat transfer characteristics are introduced.
Temporal and spatial prediction of retailer growth
Authors: Maya Sopha Bertha , Makasenda Fredrika , Maria Sri Asih Anna
Published: September 2018

Retailers have significantly affected good distribution and eventually transportation cost, traffic congestion, and pollution. Understanding spatial development of retailers is therefore of importance in planning logistics particularly in urban areas. The present research aims at predicting retailer growth both temporally and spatially. Both time-series forecasting using Holt’s model and spatial forecasting using ArcGIS were conducted. Results indicate that the existing retailers of Yogyakarta city have already exceeded the minimum requirement of retailers following the Indonesian National Standard, whereas other four districts have need of more retailers. Furthermore, it appears that the connectivity to the road network appears to be the important parameter in determining future location of retailers, contrasting traditional perspective of clustered location at central business area.
Quality control of palm kernel oil using Individual Moving Range (I-MR) chart
Authors: Fatimah  , Sayuti M , Pertiwi Elsa Putri
Published: September 2018

Quality is one of the issues that requires special attention in the operation of a company since it can affect the relationship between producers and consumers as well as reduce the company’s losses. PT. Z is a company that mainly produces Crude Palm Oil (CPO) and Palm Kernel Oil (PKO). The problem that often occurs in this factory is that the quality of processed palm kernel is under the set standard of the company, especially palm kernel products, resulting in a loss for the company indirectly. To minimize the loss, the quality control must be conducted. The purpose of this research is to control the quality of palm kernel by using individual moving range (I-MR) chart. From the research result, it is found that the level of impurities in the palm kernel products still require control because the value was above the company's provision which is ≤ 6 while the research result was > 6.
Classification of sub-sectors in creative industry for regional economic development
Authors: Cahyaningrum Deltaningtyas Tri , Widodo Erwin , Arvitrida Niniet Indah
Published: September 2018

Creative industry represents a range of industrial activities that utilize creativity, skills, and personal ability for job creation and economic development of region. A critical step to develop and sustain the competitiveness of the industries is identification process of the sub sectors of the creative industry in a particular country or region. To obtain a better clsassification and region development priorities, this study adopts location quotient (LQ) and ant colony optimization (ACO) approaches, taking Jember as a case in this study. With many indicators, LQ method can classifiy a sector into more than one classification but it describe region demograph. ACO method have an acurate result of classification with many indicators but it doesn’t describe the demography of the region. The use of LQ-ACO method can support the government to develop a more feasible classification for the creative industry of sub sector and region priorities.
Competitiveness attributes of Small and Medium Enterprises (SMEs) in the global market (case study: garment SMEs in Tri Tunggal Village, Lamongan)
Authors: Utami Issa Dyah , Novianti Trisita , Romansa Teuku Iqbal Dianta
Published: September 2018

The center of small and medium enterprises (SMEs) of garment in Tritunggal Village, Lamongan produces t-shirts, jackets, sport costumes and school uniforms, and other garment products. The SMEs have a potential opportunity to develop their marketing strategy so that they can compete with similar industries and obtain profit from the national market. This study aims to identify main criteria of marketing strategy to compete with other garment industries at the national level. The criteria determine the improvement of competitiveness of the SMEs. A review of literature was conducted to identify the criteria. Then, three respondents from the SMEs and the government were asked to score the criteria based on their preferences, using a questionnaire. Purposive sampling was used to choose the respondets Responses were selected and weighted using Analytical Network Process (ANP) and Super decision software was used to obtain the highest weight of criteria. Outputs of the software show that the role of government in developing garment industry has the highest weight, which is 0.11665. The results of this study could help the SMEs and the government plan a strategy in improving the SMEs’ capability in entering the global market.
Designing Key Performance Indicators (KPI) with macro ergonomics approach
Authors: Alimul Karim Abdul , Gunani Partiwi Sri , Sudiarno Adithya
Published: September 2018

Some Electronic Procurement Agency (LPSE) at the level of Regional Device Work Unit (SKPD) in Indonesia is still in the development stage of its life cycle, so it needs performance improvement. Key Performance Indicator (KPI) is required to measure the performance. To undertake the development of the LPSE, a sociotechnical role is required. Sociotechnical is a concept of macro ergonomics that has a principle of balancing between social and technical in running a system. So this research aims to design KPI with macro Ergonomic approach. This research was conducted at LPSE District of Kampar, Riau, Indonesia. The stages of this research are the selection of Macro Ergonomic Sub-Attributes, Expert Selection with expertise based ranks of expert, weighting using Fuzzy (Analytical Hierarchy Process) AHP, determining the priority of sub macro ergonomic attribute using Pareto and design of KPI. The result of this research are 33 Sub-Attributes of Macro Ergonomic and prioritizing resulted 18 sub-attributes of Macro Ergonomic and result 21 KPI.
Electricity sustainable energy management model for community development holistically in Phranakhon Rajabhat University
Authors: Srikun Isaree
Published: September 2018

The research of electricity sustainable energy management model for holistic community development aims to (1) study the electric energy management and human behavior towards energy efficiency in Phranakhon Rajabhat University, (2) study the cooperation of relevant agencies and the role of community participants between Faculty of Industrial Technology, Phranakhon Rajabhat University and other organizations and (3) study benefits, problems, obstacles and suggestions in implementing the proposed energy management model in the pilot area. From the experimental results, it was found that the effective energy management requires several factors to achieve. Also, the collaborative model among relevant agencies, faculty, staff, students as community owners is essential to promote energy awareness among students and faculty staff.
Understanding Facilities Management Practices to Improve Building Performance: The opportunity and challenge of the facilities management industry over the world
Authors: Sari Astri Anindya
Published: September 2018

There is much evidence that green building which is initially believed to be the solution to solve the problems of climate change and energy crisis can not perform as expected. The fact that green buildings consumed more energy and emit more CO2 than expected during the actual operation is due to the problems of inefficiency in building operation and maintenance. Facilities management integrates the entire component of the built environment including people, process, place and technology to make sure that the built environment system works optimally. It offer important contributions to address the challenge of inefficiency in terms of building operation and maintenance thus make facilities management industry become one of the fastest growing industry in the world. By doing a literature review, this paper intends to understand more about the practices of facilities management in different part of the world. It is found that there is a stark contrast in the development of facilities management practices in the western countries as compared to that in the eastern countries. The industry of facilities management is relatively new and the research related to that field is still limited thus provide a huge opportunity to develop it in the future since the importance of this field is increasingly recognize.
Manufacturing optimization using Tsukamoto fuzzy inference system method: A case study in block paving and solid concrete block industry
Authors: Sayuti M , Juliananda  , Sofyan Diana Khairani
Published: September 2018

Fuzzy method has advantages in solving real-world problems that are mostly non-binary and non-linear, such as calculating the optimization of production quantities. A case study for the application of this method was applied in UD. Setia Kawan Company that run the production of solid concrete and block paving. The problems faced by this company is the high demand for products resulting in short stock and sometimes over stock due to unstable customer ordering and inaccurate management in production planning. From the calculations, the number of solid concrete block produced by the company on the period of October 2016, December 2016 and February 2017 was not optimal. According to Tsukamoto’s FIS, the optimal number of solid concrete block in the third period is 9973, 9562 and 12.087 unit of solid concrete block. While the number of block paving produced by the company on the period of November 2016, December 2016 and January 2017 was also not optimal. According to Tsukamoto’s FIS analysis, the optimal number of block paving in the third period should be 9.116, 10.113 and 7.120 unit of block paving
Traffic queue modeling using arena simulation software (a case study of Mergan 4-Way intersection in Malang City)
Authors: Yuniawan Dani , Aang Fajar P.P , Hariyanto Samsudin , Setiawan Romi
Published: September 2018

Currently Mergan 4-way intersection is one of intersection that have most traffic dense in Malang City, East Java - Indonesia. This research implement simulation method in order to give several solution option to manage the traffic queue in Mergan 4-way intersection. Simulation method is conducted with several phase, from problem identification up to verification and validation also scenario simulation. Arena Simulation software v.14 is chosen as the tool to modeling the traffic queue line. The research outcome give several solution through Traffic Light 2 simulation scenario. With this simulation scenario, the traffic flow system simulation can be run with fewer queues of vehicles.
Traffic queue proposal solution on T-junction by utilizing arena simulation software (case study of Dinoyo T-Junction Malang City)
Authors: Yuniawan Dani , Aang Fajar P.P , Hariyanto Samsudin , Ide Bagus W.P
Published: September 2018

Dinoyo T-junction is one of the intersections with the densest traffic in the city of Malang. This is because T-junction is connecting several major campuses in the Malang city and it is one of the main traffic lanes in town. This study conducted a simulation study of traffic queue on T-junction utilizing Arena simulation software, by giving some proposals solution through simple experiments. Research outcome show that a reduction of red lights duration by 15 seconds in traffic queue simulation for each segment on Dinoyo T-junction be able to gives a significant queue reduction result.
Feasibility model for freight train insertion in one way – train schedule
Authors: Ratna Sari Arrifah , Rusdiansyah Ahmad
Published: September 2018

In 2014, 94% distribution in Indonesia used by truck mode. But in recent years, the train mode begun to be used as a distribution transport mode of replacement trucks. For shipments with a distance of 500-1500 km, rail mode is more suitable due to cheaper transportation costs and faster delivery times. But in Indonesia railway infrastructure is only used 56% of total capacity. Therefore the current logistical challenge is how to optimize the use of railways. This research tries to develop mathematical model for determining freight trains that avoid the ovetaking. The model developed is a train slot model that inserts a freight train between fixed trains. Because there is a lot of input schedules, it requires a long computation time. Therefore, this research also develops decision support tools using Visual Basic Application in Microsoft Excel. The result showed that minimum headway effect on the determination of additional freight trains and the optimum minimum headway is 6 minutes. With 6 minutes of minimum headway, the additional freight train are 15 trains. This additional train increase the carrying capacity of 900 TEUs / day. When compared with the initial condition, it means the addition of transport capacity is 21,43%
Two-Sided assembly line balancing to minimize number of workstation with considering the relationships between tasks
Authors: Rachmawaty Dina , Karningsih Putu Dana , Santosa Budi
Published: September 2018

There are many problems in assembly line. Some of the problems are assembly line reliability which relates to maintenance and unbalance workload. As a result, production line is not efficient and production plan is not fulfilled. Previous research on two-sided assembly line balancing problem has proprosed improvement method by considering index relationship between tasks. There are only two factors that is taken into account in this research, they are: distance factor of the implementation of the task (distance factor) and tools used to perform the task (tool factor). Therefore, this paper aims to develops conceptual model by considering additional factors that affecting Assembly Line Tasks Consistency (ATC). The additional factors that are considered are as follow: distance factor, tool factor, motion factor, layout factor, and skill factor. The purpose of this conceptual model is to increase productivity by minimizing number of workstations. Linear combination are used to find a combination solution of a relationship between task to complete a two-sided assembly line balancing problem. Improvement of proposed assembly line are measured according to Balance Delay (BD) and Line Efficiency (LE).
The effect of Kurtosis on the accuracy of artificial neural network predictive model
Authors: Larasati Aisyah , Dwiastutik Anik , Ramadhanti Darin , Mahardika Aal
Published: September 2018

This study aims to explore the effect of kurtosis level of the data in the output layer on the accuracy of artificial neural network predictive models. The artificial neural network predictive models are comprised of one node in the output layer and six nodes in the input layer. The number of hidden layer is automatically built by the program. Data are generated using simulation approach. The results show that the kurtosis level of the node in the output layer is significantly affect the accuracy of the artificial neural network predictive model. Platycurtic and leptocurtic data has significantly higher misclassification rates than mesocurtic data. However, the misclassification rates between platycurtic and leptocurtic is not significantly different. Thus, data distribution with kurtosis nearly to zero results in a better ANN predictive model.
Ergonomic workstations for handicraft product made from fluorescent lamp waste
Authors: Rofieq Mochammad
Published: September 2018

One of Micro and Small Enterprises (MSEs) which engages in the field of handicraft in Randuagung Singosari Malang produces various kind of souvenirs, such as twist glass, bell, fruit shaped glass, and wedding souvenirs. All of which are made from fluorescent lamp waste. The waste utilization has become a solution to the overflowing fluorescent waste from factories around the region. As the main factor in determining productivity, workstation is not yet getting serious attention. Workers use short seats when performing work on the handicraft. The tools they use are in lower setting, making them sit in squat-like position. This position setting and the unergonomic workstation tend to make workers feel tired easily which result to the lack productivity. Therefore an ergonomic workstation model is created through the production of fluorescent lamp waste recycling tool with the anthropometric approach. This study used quantitative research method by designing the model based on the anthropometry of the worker's body, resulting in an ergonomic workstation. The resulting model can improve work productivity, which ultimately can improve welfare in a sustainable manner. The application of ergonomic workstation accelerate souvenir making process. Before the design of workstation is 2.58 minute/piece, after the design of workstation is 2.17 minute/piece.
A development of sustainable and successful
business model for Thai local products: The mixed crispy rice noodle, Phra Na Khon Sri Ayutthaya Province
Authors: Palaprom Kusuma , Nawattanaprasert Kritchakhris
Published: September 2018

The aims of this research are: 1) the community business of the mixed crispy rice noodle, 2) the opinions and satisfaction of Thai and foreign consumers on the mixed crispy rice noodle and 3) enhancing the performance of enterprises. This is a Participatory Action Research (PAR) using qualitative and quantitative data. The findings are: 1) Community Group choose online business because it is a new way of distributing the community products. This product should be worldwide to the consumers and the guideline for community business development. For the online business, it is possible to sell the products and can create value added marketing which it feel like a snack products, worth, and image of Thai local product. 2) For the product and taste of this product are the colours more beautiful and delicious. 3) Satisfaction Assessment is satisfied with the development of sustainable and successful business model for Thai local products: a case study of the mixed crispy rice noodle is the upper level. 4) Enhancing the performance of enterprises are the policy of the public sector about the civil state, the trend in consumption of goods made from natural materials and to support from the public sector that they will provide relevant agencies, cognition in product development, model, and packaging including the promotion and open the market for the mixed crispy rice noodle of community group to improve the performance of the enterprises.
Development of agrotourism business model as an effort to increase the potency of tourism village(case study: Punten Village, Batu City)
Authors: Gunarta I Ketut , Hanggara Fuad Dwi
Published: September 2018

Tourism development is generally directed as a key sector to promote economic growth, increased local revenues, empowering the community's economy, expanding employment and business opportunities, and enhancing product introduction and marketing in order to improve the welfare of the community. The development of tourist areas must be a fully planned developments that optimal benefits can be obtained for the community. One approach that can be used in creating a business model in tourism development is using Triple Layered Business Model Canvas (TLBMC) extends the original business model canvas by adding two layers: an environment layer based on a life cycle perspective and a social layer based on a stakeholder perspective. This model canvas supports development along with more comprehensive and integrated communication, a business model that also supports creative innovation toward a more sustainable business model. Tourism sector in Punten village become object of observation in this research. This study aims to create new business model by looking at economic, environmental and social condition by using Triple Layered Business Model Canvas (TLBMC) approach. This business model is also supported by SWOT analysis in evaluating strengths, weaknesses, opportunities and threats in a project or a speculation of business and tools that enable strategies to evaluate objective strategies objectively, based on previously identified internal and external key success factors. The research objectives are expected in the business development of the tourism sector in addition to the creation of new business models that will form a clear business system and provide expected results, can also formulate business strategies on the tourism sector based on the analysis that has been done.
Reliability analysis of hanger shot blast KAZO machine in foundry plant
Authors: Prabowo Rinaldi Sam , Setiawan Priyo Agus , Juniani Anda Iviana , Wiediartini  , Erawati Ika
Published: September 2018

In a metal casting industry, Hanger Shot Blast KAZO machine plays a very vital role for blasting. The downtime equipment data for the last five years, 2013 to 2017, shows that the hanger shot blast KAZO is the machine which frequently encounters downtime with the number of 503,75 hours. As the only blasting machine with 2 (two) tons of load capacity, the issues of hanger shot blast KAZO affect to the targeted production process of company. Moreover, it increases risk of safety for the workers surround the machine. The purpose of this current research is to find out the reliability value of the item/ component of hover shot blast KAZO machine using Reliability Analysis method. The malfunction of its component is reviewed by FMEA (Failure Mode and Effect Analysis). While the risk assessment is obtained from RPN (Risk Priority Number) calculation - MTTF value and reliability value R(t). The result of this current study found that there are 21 malfunctions on hanger shot blast KAZO machine. MTTF analysis shows the highest MTTF value is 9195,324 hours for bearing impeller component and the lowest is 3498,997 hours for motor components. Meanwhile, reliability analysis shows that the largest reliability value with 0.999915 is encountered by motor contactor of crane, while with a value of 0.26385, hanger rotator motor contactor component encountered the lowest reliability value.
Designing an ergonomic backpack for sixth grade elementary school students in Bandung based on the ideal weight of backpack load
Authors: Kristina Sonna , Amanda Bella
Published: September 2018

This study was conducted to determine whether the backpack’s load of sixth grade elementary school students has exceeded the recommended load limit and to design an ergonomic backpack based on the ideal weight of the backpack’s load. The data were obtained using anthropometry and interviews with 70 respondents of 6th grade elementary school students in Bandung. It is known that the average of backpack load has exceeded the limit based on previous research has done to 10% of the child’s weight can caused musculoskeletal disorders in shoulder and back parts, so in this study a backpack was designed ergonomically based on the ideal weight of a backpack by converting 10% of the average weight of the students into the backpack capacity. The conversion result is combined with anthropometric data to determine the dimension of backpack, which is 35 x 25 x 6 cm. Backpack equipped with some additional features such as front pocket, back pads and chest straps as well as waist straps. Finally, this study showed the design of an ergonomic backpack for sixth grade elementary school students, where the capacity of the backpack is conditioned to not carry loads that exceed the ideal weight of a backpack.
Towards the greenship assessment and certificate of new building Design Recognition (DR) for the design of IDB-funded integrated classroom building Universitas Negeri Malang, Indonesia
Authors: Hajji Apif M. , Ariestadi Dian
Published: September 2018

To foster Universitas Negeri Malang (UM) as the Center of Excellence in Learning Innovation, with the support from the Islamic Development Bank (IDB), two 9-storeys integrated classroom buildings will be built, having the total built area about 44,800 sqm, which are divided exactly in two rectangle-shaped towering blocks. The buildings are projected to have green building status for Design Recognition (DR) by approaching GBCI’s greenship rating system. By using DED documents of the buildings, this study analyzes technical and engineering aspects to fulfill greenship requirements and recommends a specific level of greenship. The results show that overall targeted score is 47 and recommend Gold level of greenship.
The effect of textured surfaces on the hydrodynamic pressure generation in journal bearings
Authors: Muchammad  , Tauviqirrahman Mohammad , Akbar Rizqy Amanullah , Hilmy Fuad , Jamari
Published: September 2018

Surface texturing of the lubricated bearing has proven to improve the hydrodynamic performance. The present paper analyzed the effect of surface texturing on the covergent journal bearing with computational fluid dynamic (CFD) approach. The eccentricity ratio, the ratio of textured depth and surface area are the main parameter research. It was shown that for the eccentricity ratio of 0.2, the surface texturing improves the hydrodynamic performance lubrication by increasing the load support. On the otherwise, for the eccentricity ratio of 0.8, the surface texturing does not improve the lubrication performance, even under certain condition, it decreases the lubrication performance of journal bearing.
Numerical study of flow characteristics on wing airfoil eppler 562 with whitcomb winglet variations
Authors: Setyo Hariyadi S.P , Sutardi  , Widodo Wawan Aries , Mustaghfirin Muhammad Anis , Rachmadiyan Arifandi
Published: September 2018

Winglet is a tool used to improve the efficiency of aircraft and UAV performance by preventing fluid flow jump from lower surface to upper surface at wingtip. The addition of this winglet resulted in improved lift and reduction of drag force from the aircraft wing or UAV. From Whitcomb's research, it was found that the use of winglet on a full size airplane can increase fuel efficiency by 7%. The research led to the idea of conducting research on fluid flow characteristics on the UAV wing with the Eppler 562 airfoil combined with the whitcomb winglet. This numerical study was conducted using the Computational Fluid Dynamics (CFD) method based on the advantages of using this simulation that can review the fluid flow in macroscopic way. This study is provide accurate fluid flow visualization results and can improve the performance of the wings when compared with wings without winglet (plain wing). Wing with the Eppler 562 airfoil combined with the whitcomb winglet results reduction in rotating motion that makes velocity components as opposed to lift.
Characteristic comparison of photovoltaic module and photovoltaic thermal
Authors: Krismadinata  , Lapisa Remon , Syahril  , Asnil
Published: September 2018

This paper discusses an attempt to compares the electrical characteristics of two solar modules of the same type and size in which one of the solar modules at the bottom is mounted a copper pipe for circulating water (as call photovoltaic thermal). The research was steered to observe water cooling effect to electrical characteristics of PV module. This system serves as a heat absorption on the bottom of the solar module. The experiment is conducted at the same time, place, and sunlight intensity conditions for both solar modules. The characteristics of short-circuit current, open circuit voltage, upper and lower temperature and the irradiation of sunlight from the two solar modules are observed. The test results show that photovoltaic thermal generate greater electrical power than solar modules not equipped with heat absorption
Performance testing of a downdraft biomass gasifier stove for cooking applications
Authors: Jangsawang Woranuch
Published: September 2018

A down draft biomass gasifier stove with four steps of cleaning gas system was developed to produce the producer gas for replacing LPG for cooking applications in lunch project for the student in rural school area. This project has been implemented at Bangrakam primary school that located at Pitsanuloke Province, Thailand. The biomass fuels used are Mimosa wood twigs. The gasifier stove was developed based on down draft fixed bed gasifier with the maximum fuel capacity of fourteen kilograms. The performance testing of the biomass gasifier stove showed that the heating value of the producer gas is 4.12 MJ/Nm3 with the thermal efficiency in the percentage of 85.49. The results from this study imply that it has high potential to replace LPG with producer gas.
A preliminary review of Indonesian national standard of chair and desk for junior high school level
Authors: Yanto  , Lu Chih-Wei , Caroline Winda Y.
Published: September 2018

This study was a preliminary review to evaluate the dimensions of Indonesian national standard of chair and desk for junior high school level. The furniture was evaluated for seat height, seat depth, seat width, backrest height, desk height and underneath desk height. A number of 301 students were measured for their dimensions. Six equations were used to evaluate the match or mismatch between students’ dimensions and dimensions of chair and desk. Results showed mismatch between students’ dimensions and the dimensions of chair and desk as issued by the National Standardization Agency of Indonesia. The results of this preliminary review could be a basis for a larger study which covers more samples and geographical areas.
Effect of perforated concave delta winglet vortex generators on heat transfer augmentation of fluid flow inside a rectangular channel: An experimental study
Authors: Syaiful  , SU MSK Tony , Sinaga Nazaruddin , Wulandari Retno , Bae Myung-whan
Published: September 2018

Compact heat exchanger with gas as a heat exchange medium is widely used in power plants, automotive, air conditioning, and others. However, the gas has a low thermal conductivity resulting in high thermal resistance causing a low rate of heat transfer. Therefore an improvement to the convection heat transfer coefficient is necessary. One way to enhance the convection heat transfer coefficient is to use a longitudinal vortex generator. However, the increase in convection heat transfer coefficient is followed by an increase in pressure drop. Therefore, this work aims to improve the convection heat transfer coefficient with a low pressure drop. To achieve this goal, experiments were carried out by perforating a longitudinal vortex generator with a diameter of 5 mm with variations in holes number one, two and three. Two types of longitudinal vortex generators are compared. The experimental results show that the convection heat transfer coefficient for the case of perforated concave delta winglet vortex generator is only decreased by 1% from that without a hole, while the pressure drop is decreased by 11.6%.
Effect of various number conical strip inserted in the tube on heat transfer performance
Authors: Mustaghfirin M. Anis , Moballa Burniadi , Thohari Syaifullah Hamim
Published: September 2018

This work, fluid flow and heat transfer in single and multi phase flow chould be enhanced by turbulent flow in heat exchanger tube with one of heat transfer augmentation techniques. Characteristic of globular tube fitted with the multiple conical strips insert were investigated. Most of study are related with this work, they found that an addition by single conical strips insert will make nusselt number increase 5%. Unfortunately, it was also increase pressure drop about 10%. This work improve their work by adding amount of conical strips inserts.The modification that will become 4 variation number of conical (n = 2, 3, 4, and 5) with 4 kind of central angle (α = 20°, 30°, 40°, and 50°), it is shown that the best performance of conical strips insert configuration is 2 peace of strips with 20° central angle. This work successfull improve Performance heat transfer value in tube about 11% compare with A. Fan et al work. Thus achieve a high overall heat trasnfer performence and it is a promising tube insert which would be widely used in heat transfer process turbulent flow.