bluuebunny/crossref_metadata_2025_split huggingface dataset:
Power saving of IP over WDM: Coherent taxonomy, mechanism and technique: A review
Authors: Pratama L P , Saud S N , Wardihani E D , Lehat N M 
Published: March 2021

Abstract
In this survey, the comparison of highlights on the importance of energy saving in IP over WDM (IPoWDM) is presented and followed by the review on the existing related article by using systematically data review based inclusion and exclusion criteria. The adaptive clock frequency, sleeping mode, and hybrid grooming mechanism protection is the latest breakthrough in the IPoWDM mechanism. The researcher identifies trend of survivability is divided into three protections: link scheme, path protection and restoration. This paper focuses on the techniques and methods employed, and analyze the difference from the latest article review. The analysis based on the literature review indicates the development in the research trend and estimates the energy saving based on the techniques, mechanism and modeling and protection scheme by identifying the advantages and benefits for the next research. Results of obtained, we viewed from the ease and the great impact on power saving, the technology of sleep mode on the standby network is possible. The scheme that is carried with a protection mechanism is set to sleep and wake quickly. The easiness is a principal aspect that encourage to look into best protection strategies to save power in IPoWDM networks. Nevertheless, these does not prevent the possibility of development another mechanism. Finally, the potential for future research directions are also discussed.
Wind speed monitoring and alert system using sensor and weather forecast
Authors: Mardiyono M , Sari R E , Dini O N 
Published: March 2021

AbstractStrong wind allows uproot the trees and causes human victims to be injured or dead. Unfortunately, the strong wind comes suddenly to the trees on the street and many people and traffic are around there. It needs wind speed monitoring and strong wind early warning to avoid the victims due to fallen tree. This paper explains the development of wind monitoring and early warning system using wind speed sensor and weather forecasting. The steps involve investigating the wind speed, designing the system, developing the system, testing, and validating. The result shows that the system can measure the wind speed on the spot in real time and trigger the alert to the people around if the strong wind was occurred. On the other hand, it also informs the forecast of wind speed according to weather web services data few hours before. Applying this system will help the government to prevent the victims of fallen tree due to strong wind.
Victim identification application with face recognition based on android
Authors: Triyono L , Handoko S , Puspawaty K Y 
Published: March 2021

Abstract
The increase in the population causes the problems faced are also increasing. Problems that arise include that, the number of accident victims who have recently often occurred on the highway, where the victims of the accident suffered minor injuries to severe and some even have to take lives due to accidents on the highway. And the second is crime, like a murder case that can take someone’s life. Often victims do not carry identities, making it difficult for the police or related parties to identify victims of accidents and killings. This system is made in the hope that it can help the police or related parties to be able to recognize the face of the victim without an identity just by using the android application. So that it can save more time in identifying the identity of the victim. Victim face recognition algorithm using Facial Landmark Detector and for its implementation using the Dlib library. To do facial recognition, it is done by taking Figures of victims using an application on android which is then sent to the server for the recognition process. After the image is sent to the server, the recognition process will be carried out, the results of the introduction process are sent back to android to display the results. The level of accuracy of the victim’s face recognition with a wound if using a tolerance of 0.35 is 100%, but if using tolerance 0.2 the level of accuracy is only 25%.
Performance analysis of shape, color and texture features on tracking information face based on CBIR
Authors: Jumi J , Zaenuddin A , Mulyono T 
Published: March 2021

Abstract
The image has the features of shape, color and texture that are vary. Each feature has a different performance in supporting the accuracy of information retrieval using a process approach to CBIR (Content-Based Image Retrieval). On the image with different objects different performance will be generated on each feature. For example, that the performance features of the form of the more dominant compared features color and texture on the image with the face, while the object on the image with the object of interest feature is more dominant than the features of texture and shape. In this research was conducted on the analysis of the performance features of the shape, color and texture in supporting the accuracy of a search using the approach of CBIR (Content Based Image Retrieval). The method used are invariant moment, color moment and GLCM (Grey Level Co-occurrence Matrix). The results showed that the best search accuracy is 95%, where the features of shape has a performance by 50%, 30% color feature and texture feature by 20% with 600test image with object database face.
Nutrient Film Technique (NFT) hydroponic nutrition controlling system using linear regression method
Authors: Nursyahid A , Helmy H , Karimah A I , Setiawan T A 
Published: March 2021

Abstract
Nutrient Film Technique (NFT) hydroponic cultivation could be an alternative to overcome the increasing food need. Nutritional needs supply of hydroponic plant are one of parameters that need to be considered. NFT hydroponic nutrient controlling system aims to facilitate farmers to maintain the amount of nutrition according to plant needs. This system uses linear regression method to control the amount of nutrients. The accuracy results obtained from controlling system experiment are 87.84%.
Fall detecting clothes in realtime based seniors full body motion capture system using multiple inertial sensors
Authors: Yudantoro T R , Pramuditya F , Apriantoro R , Jum’atun S 
Published: March 2021

Abstract
The physical ability of the elderly will decrease along with the aging process, thus increasing the potential for falls. An elderly person who has experienced a fall and is not detected for a long time will bring many possible consequences. Early detection of an elderly fall will help to minimize this possibility by reducing the time between the occurrence of an event and the arrival of medical assistance The purpose of this research is to build a Fall Detecting Clothes in Realtime Based Art Full Body Motion Capture System Using Multiple Inertial Sensors. This system builds by Waterfall methodology where every research step is done in sequence, start from analysis, design, coding, testing. Testing methodology is black box, which is a test every feature function. The Fall Detecting Clothes in Real Time Based Systems Full Body Motion Capture System Using Multiple Inertial Sensors has been tested using black testing box with the results of all feature functions working properly. The system has been tested with several conditions with the results of all controls and output data works properly as well.
Improved Savonius double blade performance using modified blade shaped with variations of the wind flow ratios on the blade inlet and outlet side
Authors: Herlambang Y D , Supriyo S , Prasetiyo B 
Published: March 2021

Abstract
The Savonius turbine is a wind turbine that has a vertical shaft parallel to the turbine blade and has advantages that can save wind energy from all directions at low speeds. The purpose of this study is to examine the Savonius turbine model with variation in the ratio of the blade inlet side and the blade outlet side to improve turbine performance. The research method used is turbine research; conduct an experimental test by varying the ratio of the inlet and outlet sides of the blade (1:1 and 1:2) to the speed of the blade’s wind flow. Then conduct turbine performance analysis to get the best efficiency between the ratio of the inlet and outlet sides of the blade. The test was carried out at wind speeds of 5 m/s, 7 m/s, 9 m/s, 10 m/s, and 12 m/s with lamp loads distributed between 5-40 Watts. Analysis of turbine performance test The test results show that Savonius single blade wind turbine has the best efficiency of 8.43% at 5 m/s wind speed and is able to produce electricity of 10 Watts and then the best efficiency released by a 1:2 double blade wind turbine that has efficiency by 6, 9% at a load of 20 Watt and a 1:1 double blade wind turbine which has an efficiency 4.37% at a load 10 Watt.
Performance of single cylinder diesel engine using triple fuel HSD-LPG-Steam
Authors: Kusuma G E , Sarena S T , Santoso M 
Published: March 2021

Abstract
Fuel system modification techniques to improve engine efficiency could be the way to slow down the energy crisis caused by the lack of new fuel inventions. The Compression Ignition (CI) diesel engine is one of the most preferred engines for both in-land and marine transportation motors. The advantages of compact dimensions and large generated power make CI diesel engine superior to other engine types. The large number of single CI diesel engines use in small fishing vessel engines and agricultural machinery will contribute substantially to fuel consumption in a cumulative manner. Previous researchs on the modification of fuel system with bi-fuel system High Speed Diesel (HSD)oil – Liquified Petroleum Gas (LPG) system capable of reducing Brake Specific Fuel Consumption (BSFC) up to 24% and exhaust gas opacity up to 68%. Subsequent studies focused on engines with single fuel HSD oil but were injected with superheated steam in 1 atm (abs) 130 0C by utilizing Heat Recovery Generating System (HRSG) using heat of exhaust gas for a flowrate of 1.5-4.5 kg/hour. It is capable of delivering the performance improvement of Specific Fuel Consumption (SFC), which is reduced by 8.92% compared to diesel engines without steam injection. Recent research combines the above two modification methods so that diesel will adopt two types of fuel- oil-LPG with additional superheated steam injection resulting from exhaust gas heat cogeneration system. Experimental results of the diesel engine with LPG injection maintained at 0.4 kg/h and 3.5 kg/h superheated steam with an engine variation loading of 0.3-0.7 kWh provide an average AFR of 30.09 and SFC improvement up to 37.2% lower than SFC engine standard with a single fuel HSD oil.
Application of CNC machine router 3-Axis for making of Engravired granite or marble
Authors: Suharto S , Suryanto S , Sarana S , Purbono K 
Published: March 2021

Abstract
The development of a Computer Numerical Controller (CNC) machine specifically for the manufacture of creative product crafts needs to be encouraged to improve the variety and quality of the products. Manual engraving of natural stone (marble, granite) by relying on the skills of people and simple equipment will produce a product with a long time of processing. Competition in the business and industrial world is needed to increase effectiveness and efficiency with short manufacturing time indicators, low prices, more and more interesting design variations. The research objective is to find effective and efficient machining parameters, analyze factors that influence surface roughness, and enrich the variety of creative product designs of marble stone materials. This study uses an experimental method approach which is a study to find the effect of spindle rotation variables, infeed speed, infeed depth on the quality of surface roughness by operating the CNC Machine Router 3-Axis. It was found that the following parameters of the machine are cutting speed machining 30 (m / min), spindle rotation 12000 (rpm), and speed / feed rate 2000 (mm / min). Analysis of factors that influence the surface roughness of marble engraver the higher the speed / rate of infeed and the depth of infeed, the higher the surface roughness value of marble. Computer and engineering software applications are able to increase the variety of creative product designs.
Android based maintenance information system for machining workshop in polytechnic high education
Authors: Ardjo A S , Wardihani E D , Prayitno P 
Published: March 2021

Abstract
There are six state polytechnics aged 36 years old in Indonesia. The six polytechnics have machining workshops with the same number and machines. The problem that arises in Semarang State Polytechnic is the maintenance system that has not been integrated into a system, even though the electronic maintenance and repair activities have been carried out. The purpose of this study is to develop a maintenance information system that can control all of its activities well. The system is built with an object-oriented approach implemented by android. Research results include: database systems, web application systems, and android application systems that have delivered output correctly.
Hybrid power plant of the photovoltaic-fuel cell
Authors: Herlambang Y D , Prasetyo T , Roihatin A , Safarudin Y M , Arifin F 
Published: March 2021

Abstract
The purpose of this research is to study the performance of hydrogen fuel cell to study different fuel flow rate and different concentration to obtain the optimum performance of the cell. First, design a hydrogen fuel cell model, second simulate cell performance toward hydrogen fuel flow rates of 6, 18, and 30 mL/min and fuel concentrations of 50 mol/m3. Subsequently, we obtained the characteristics of voltage-electric current density and power density-electric current density per stack of fuel cell. The research of this hydrogen fuel cell obtained the power density optimum of 0.0471 mW/cm2 at a cell current density of 0.135 mA/cm2 and a cell voltage of 0.35 V. The greater the load the greater the time used by the battery for instant loads. The average time when the load is small is 10 W with a time of 240 hours and the fastest time when a large load is 400 watts with a time of 6 hours. Decreasing battery discharge time to the same load due to the completion of power losses in each device or circuit that produces the power generated by the battery does not reach the maximum load.
Performance of a solar chimney configuration to achieve equal flow rate for ventilation of three-story building
Authors: Nguyen T V , Quoc Nguyen Y 
Published: March 2021

Abstract
In energy-efficient buildings, natural ventilation using solar chimneys greatly reduces energy consumption. In this study, a solar chimney was installed in a three-story building to examine the flow rate of the floors while balancing the flow rate of each floor. To predict the flow rate, a fluid dynamics model was developed based on a computational fluid dynamics (CFD) method with a calculated model of RNG k-e, heat flux 600 W/m2
. By changing design parameters, the air flow was investigated.
Forced and natural ventilation of a room with a combined solar chimney and Earth - to - Air Heat Exchanger system
Authors: Nguyen V T , Nguyen Y Q 
Published: March 2021

Abstract
In this study, a passive ventilation and cooling technique which is widely used in sustainable building designs was investigated by a numerical simulation based on computational fluid dynamics (CFD). A system of a solar chimney (SC) and an Earth-to-Air Heat Exchanger (EAHE) is able to ensure thermal comfort in a house by generating an air flow which is induced by the thermal effect. The solar chimney drew ambient air (at 35°C) through the inlet of EAHE; the air flow was cooled by a lower temperature of the underground pipes (at 20°C) before circulating inside the house and leaving through the outlet of the solar chimney. Both the openings of the system were exposed to the atmosphere, and the atmospheric pressure was set at the inlet of the EAHE pipe and the outlet of the solar chimney. The performance of this ventilation and cooling system was analyzed under effects of design parameters, including the gap of the chimney, the diameter and length of the EAHE pipe as well as the solar heat flux applied on the wall of the air channel of the chimney. The results of the assessed parameters, such as temperature inside the house, show that the indoor temperature was reduced to 25°C and 26°C, respectively for the forced ventilation case of 0.2 m/s and natural ventilation case in the configuration with the EAHE pipe length of 11m. The coupled solar chimney and EAHE system can achieve the thermal comfort conditions for both cases of natural and forced ventilation.
Minimizing Dynamic Loading Resonance of Battery Pack Subjected to Road Profile Loads
Authors: Abdillah Muhammad Farkhan , Budiman Bentang Arief , Prasetio Ignatius Pulung , Sambegoro Poetro Lebdo 
Published: March 2021

Abstract
One of the main problems in designing battery packing for electric vehicles is the appearance of deformation in the components due to vibration generated by road profile. The vibration brings the most significant effect on the battery packing due to low frequency and high amplitude. Resonance occurs at low frequency since most of the E-trike components have a low natural frequency. This should be avoided to increase the reliability of the battery pack due to mechanical loadings. Modal analysis, Quarter Car Model (QCM), and optimization were conducted in this work. Modal analysis is used to find the natural frequencies of the battery pack on several modes of vibrations. Simulink of the Quarter Car Model (QCM) produces the load from the road profiles based on ISO 8608. The load from the road profiles is used as the input in the Ansys 16.0 Harmonic Analysis. The output is the deformation frequency response for the bottom side case of the battery pack. To reduce the outcome of resonance, a damping mechanism is selected to reduce maximum amplitude from road profile at a resonance frequency. The simulation results show that the damping mechanism is the suitable technology to decrease the major amplitude of the deformations from road profile with reduction up to 54% lower than the previous model. The lower deformations of the battery pack component reduce the battery pack’s possible accident due to vibration.
Numerical simulation of a solar chimney for natural ventilation of a building: Comparison of different computational domains
Authors: Huynh Trieu N , Nguyen Y Q 
Published: March 2021

Abstract
Numerical simulations, particularly those based on the Computational Fluid Dynamics (CFD) Method, have been widely employed in engineering and design, such as design of green buildings. In this study, we investigated effects of the computational domain, a factor influencing the accuracy of a CFD simulation, of a solar chimney, a device for natural ventilation of buildings, on the predicted performance of a solar chimney attached to a building. Four different domains which, in turn, included both the chimney and the house, the chimney and the inlet length, the chimney with the horizontal inlet, and only the air channel of the chimney, were examined. The CFD model was based on the RANS equations and RNG k – ∊ turbulence model. The chimney had different heights, gaps, heat fluxes, and the location of the heat source in the air channel. The results show that the differences in the predicted flow rate and temperature rises through the chimney among the domains changed with the height, gap, and the location of the heat source. The simplest domain, which was a simple vertical rectangular channel, over – predicted the flow rate and under – predicted the temperature rise. The main cause of its worse performance is because of its inability to model the separation zones near the inlet of the air channel. Therefore, it is not recommended for high accuracy – simulations. Two other simpler domains, which included the inlet length and only the inlet, can be used when the required accuracy is within 10.0%. The full domain consisting of both the chimney and the building is preferred for the highest accuracy.
Pipe sizing of district cooling distribution network including in energy transfer station
Authors: Lisaba E B , Augusto G L 
Published: March 2021

Abstract
A district cooling system (DCS) distributes chilled water to different buildings connected to the main plant. The benefits of a DCS include greatly increasing energy efficiency and decreasing life cycle operation costs. The installation, maintenance, and design of a DCS can be expensive, however. Therefore, means of decreasing costs without cutting quality is necessary. Given this, a hypothetical DCS is presented with a constant temperature difference set-point of 9&#x00B0;C. The DCS was set to have a system diversity of about 80%. Hydraulic calculation will be used in the study in order to determine the smallest possible pipe sizes that would permit normal operation below allowable limits. The network is divided into 3 parts; namely the main line (ML), the plot take-off (PTO), and the plate-type heat exchangers (PHEs). The DCS will have a piping network connected to 12 energy transfer stations, each with 3 sets of PHEs. Initial guess values of pipe dimensions and friction factors will first be calculated using continuity and the Von Karman equation. A single-variable Newton-Raphson method is then used on the implicit Colebrook-White equation to estimate the actual friction factor for each pipe. Then, the calibrated pipe sizes will be determined by cross-referencing theoretical values with industry-standard sizes as specified in ASHRAE. In calculating the friction factor, it was found that the values increase as the given tonnage decreases, thus implying a decrease in pipe size as the chilled water flows toward the last building. The entire study was conducted on MATLAB. It must be noted that the study is only limited to the selection and design of a simple DCS.
Finite element analysis of frictional coefficients in press fit pins
Authors: Gonzaga J , Ubando A T , Arriola E , Moran R L , Lim N R E , Mercado J P , Conversion A , Belarmino D 
Published: March 2021

Abstract
The automotive industry places electronic components in vastly different conditions compared to that for residential purposes. Thus, there are certain components that have found an essential use in this industry. One such component is the press fit pin. The press fit pin is seen as an alternative to soldering because it is cheaper to implement and more reliable at times. All technologies however, come with disadvantages. One of the common issues encountered by press fit pins are the excessive stresses on both the pin and the hole during insertion which tend to cause deformation or cracks in the substrate material. Because of this, the main topics of research on press fit pins are most commonly on the insertion forces and retention forces present. These forces occur on the interfaces between the pin and the hole where it is inserted. Therefore, there have been several studies on the friction between the two components. The studies however, only explored the frictional coefficient of their present system which reduces its applicability on other designs. This work seeks to present an in-depth finite element analysis on the effects of varying frictional coefficients would have on the equivalent stress and retention forces present on the press fit pins.
HALE UAV ITB perpetual flight
Authors: Moelyadi Mochammad Agoes , Zulkarnain Muhammad Fikri 
Published: March 2021

Abstract
The challenge developing High Altitude Long Endurance (HALE) UAV is to obtain the ability endurance of more than 24 hours (perpetual flight). The ability to fly for a long time needs to consider: high aerodynamic efficiency, high motor-prop efficiency, hybrid battery-solar panel energy source, light weight structures, efficient control, and optimum flight mission. This paper discusses about strategy, method and requirements to calculate perpetual flight mission for the case of HALE UAV ITB.