bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of high selectivity narrowband eight-order high-temperature superconducting sextaplexer
Authors: Wang Li-Tian , He Ming , Xiong Yang , Zhang Wei , Chen Hai-Hua , Ji Lu 
Published: July 2020

Abstract
A C-band high-temperature superconducting six-channel multiplexer (sextaplexer) is proposed in this paper. A distributed coupling scheme is introduced, with which the bandpass filter (BPF) in each channel can be designed individually. The computational complexity of the proposed method is linearly increased as the number of the channels is getting larger, which is much lower than the traditional method. The proposed coupling scheme requires no extra matching network, which helps to reduce the size of the multiplexer circuit. The sextaplexer consists of six high-order BPFs with cascaded quadruplet structure. A pair of transmission zeros can be introduced to make the BPF have high selectivity. The example sextaplexer works at the C-band and each fractional bandwidth is about 0.8%. The center frequency ratios and the isolations of each adjacent channel can reach 1.01 and 42 dB, respectively. The measurement results match well with the simulation results, which verifies the effectiveness of the proposed method.
The application of STEAM (Science, Technology, Engineering, Arts, and Mathematics)-based Learning in Elementary School Surakarta District
Authors: Saddhono K , Sueca I N , Sentana G D D , Santosa W H , Rachman R S 
Published: July 2020

Abstract
Innovative learning is one of the answers to deal with challenges in the current era. STEAM-based learning is needed by students in Indonesia as an effort to train their skills and talents in facing problems in the 21st century. This study aims to describe the integrated thematic learning planning, implementation, and assessment in SD Negeri Tegalrejo 1 Yogyakarta. It was a descriptive qualitative research. Subjects of this study were the classroom teacher, students of VB class, and headmaster. Technique of data collection were observation, interview, and documentation. Data were analyzed by using some steps, in terms of data reduction, data display and drawing coclusion. Technique of testing data vailidity deployed triangulation of data collection technique and data sources. The result indicates that the integrated thematic planning conducted by teacher has contained the minimum criteria of lesson plan. The implementation of STEAM-based integrated thematic learning has presented the characteristics of integrated thematic learning, in terms of using subject guide of Basic Competence (BC), in which each BC has its own material.
Synthesis Biolubricant By Esterification Of Castor Oil (Jatropha Curcas L-Oil) With Chlorate Acid Catalyst
Authors: Rochmat Agus , Dudayev Alfaruqi Aslan , Saefuri  , Suaedah  , Nurtanto Muhammad 
Published: July 2020

Abstract
Biolubricant is made by reacting vegetable oil with alcohol with the help of strong acid or strong base catalyst in the esterification process. The goal of this research is to know the flash point of bio-lubricant, and know its characteristics. This research is done by reacting Jatropha oil and methanol reactant with perchloric acid with a variety of reactant mol and variety concentration of perchloric acid as a catalyst with esterification time of 7 hours, after that it will be purified by a various method to get the desired result. Results in this research have the highest flash point on 26 °C and lowest on 242 °C; highest viscosity on 217 cP and lowest on 130, 5 cP at 40 °C. At other temperature, the best viscosity is 184,5 cP at 40 °C and 27,45 cP at 100 °C. Average pour point from this bio-lubricant is -18,8 °C. Almost chemistry compound of Biolubricant contains fatty acid 9,12-Octadecadienoic acid (Z, Z) with methanol resulting monoester compound 9-Octadecenoic acid (Z)-, 2-hydroxy-1-(hydroxymethyl) ethyl ester.
The Utilization of Bamboo Innovation as Aggregate Substitute for Paving Block
Authors: Wiwoho Mudjanarko Sri , Sugiharti  , Daniel Limantara Arthur , Mayestino Machicky , Eko Adi Sutrisno Andreas , Haziman Wan Ibrahim Mohd , Pratama Wiwoho Firdaus 
Published: July 2020

Abstract
The paving block is part of pavement system that is widely used by people in Indonesia. Paving blocks are common in urban and rural communities. Paving blocks are very easy to make and easy to apply. Standard way of making a paving block based on SNI 03-0691-1996 method is a mixture of cement, sand/gravel and water. Excessive use of natural materials has an impact on the sustainability of the natural environment. This problem can be solved with various innovations without having to reduce the quality of paving and the pavement itself. Wiwoho, M. S., et. al., [1][2] has conducted preliminary research using bamboo materials instead of aggregates. Whilst Bamboo trees are fast-growing plants and are widely used as merely buffer buildings. So, Bamboo waste materials have not been used optimally enough. The methodology used is that unused bamboo materials being cut in to the size of the required model. The use of bamboo material as a mixture in paving block has adjusted the size, and its composition. The result of this research is that paving blocks made from bamboo trees can meet SNI 03-0691-1996 standard with D quality. Thus, paving blocks can meet eligibility requirements, reasonably enough.
Internet Of Things (IOT) For Inventory And Container Position
Authors: Darmawan C D P , F Dwi S , Triyasa D H , Octaviani R D 
Published: July 2020

Abstract
Along with the rapid development of information technology, there is a change in every field, one of which is in the container depot (container storage). Smooth flow is part of the supporting aspects of the rapid transfer of products to consumers. Internet of Things (IoT) as technological development is a solution to support activities in container depots. The use of an IoT / RFID based system for transporting containers is an indispensable change in the interaction of the smooth flow of container transfers. The containers that are piled up will make the container search process longer and other processes hampered. The author tries to find out how to implement IoT in the depot container to achieve a container depot that is integrated with Information Technology (IT). This research was carried out using a qualitative method that wanted to be seen clearly and deeply what had been done.
Do Customers Will Accept Seaweed Packaging Innovation?
Authors: Alfaridi Nursery , Puspitorini A G , Wicaksono D J , Octaviani R D 
Published: July 2020

AbstractWorld nowdays is suffering from a lot of environmental issues and one of the causes is plastic waste. Plastic causes hazardous negative impact on environment due to its non-biodegradable nature. The use of plastic majority is for the purpose of packaging. Whereas, there is packaging innovation using seaweed based which is more environmental friendly but the companies that use it are almost nonexistent. This research investigated the customers acceptance if their basic packaging material change from plastic to seaweed and focused on edible food packaging. Methodology used for this research is quantitative method with simple linear regression and SPSS for the data analysis. The purpose of this research is to encourage the company to start changing their packaging material if the customers itself also willing to accept it, and along with to inform customer about the packaging innovation and cooperate to reduce the use of plastic. The result of this research is customers do will accept the seaweed packaging innovation.
Payload Optimization Comparison Of Airbus 330 – 300 And Boeing 777 – 300ER Aircraft
Authors: Jasmine A , Putranto A R , Charles An , Sodikin A 
Published: July 2020

AbstractAircraft analysis is one of the strategy that are applied in the airline industry to be able to compete with other airlines by determining which aircraft is more effective, efficient, and economic. In fact, some airlines cannot apply this strategy. With this analysis, the airline is able to compete. By Seat Load Factor (70%) calculation, estimated weight of seat vacancy can substitute to Cargo Allowable. The result of calculation and comparison will produce the effectiveness aircraft on payload optimization. The result of comparison analysis is able to be concluded that A 330-300 aircraft is the aircraft that can better implement Payload Optimization. The lowest Total Operating Cost in the amount of US 14,042.94.- Dollar compared to the B 777-300ER aircraft that have Total Operating Cost in the amount of US 21,887.06.- Dollar. With a larger Total Operating Cost is owned by B 777-300ER, A 330-300 has a greater profit of US 13,742.62.- Dollar compared to B 777-300ER which has profit of US 13,433.94.- Dollar.
The Implementation of The Auto Gate System as A Facilitator of The Flow of Goods At Container Terminal (A Study At Operating Terminal 3 Ocean Going, Tanjung Priok Port)
Authors: Pramesti S , Safitri S M I , Sirait D P , Wibisono G , Simarmata Juliater 
Published: July 2020

Abstract
The heavy traffic of goods in the port, infrastructure and technology are needed as a support in the activity of goods traffic in the port. Terminal 3 Ocean Going IPC TPK has just implemented an auto gate as a goods flow accelerator at the port. This study aims to knowing the implementation of the auto gate system at Terminal 3 Ocean Going IPC TPK in facilitating the flow of goods and knowing the obstacles in the application of the auto gate system. The method used is qualitative descriptive by interview, observation and field research. Expected results with the existence of an auto gate system can increase the effectiveness and efficiency of services in goods traffic activities and can make it easier to control the flow of goods movements. The implementation of the auto gate system at Terminal 3 ocean going is considered good and provides many benefits, but IPC TPK has just been in a development test so that evaluation is still underway to go to the production test stage.
Calculation of EOQ (Economic Order Quantity) In Optimizing the Inventory Level of Dacron at Mell Toys’ Home Industry
Authors: Ali Yudhanto Nur , Arifah  , Hutauruk Paul S , Indriyati  
Published: July 2020

Abstract
Inventory control is very important so that the production can operate run well, one of the inventory controls is by using the EOQ method (Economic Order Quantity) on the purchase of raw materials. The purpose of the research is to optimize inventory costs in the manufacturing of Mell Toys home industry and to find out the total optimal of raw material orders. The method used in this study is a quantitative method. The data used in the study were obtained from interviews. Data will be calculated manually obtained from the company using the EOQ method approach. This research produces data using EOQ the number of orders for raw materials is 3885 kg, this is greater than the company’s purchasing policy but with the calculation of EOQ, the total inventory cost can be saved from Rp. 4.800.000 to Rp. 424.250,8671. So using EOQ in purchasing raw materials can optimize inventory costs in Mell Toys home-made doll industry.
Application of Reverse Logistics Management in Utilizing and Creating Use Value from Plastic Waste
Authors: Assyari Faisal , Yudha Pamungkas Bagas , Rifni Muhammad , Hutauruk Paul S 
Published: July 2020

Abstract
Production activities can be interpreted as yielding for the use of goods and services in carrying out certain production, which if it cannot be recycled can lead to accumulation of garbage around the society, skin diseases / disrupt human health, and air pollution.Reverse logistics is an efficient planning that relates to raw materials and reuses the use value that is still in an item or the process of disposal of an item properly. It can be said that Reverse logistics is the return of goods from consumers to distributors to reuse a utility goods or also can be because the item is damaged / not on demand or also because of the disposal process of the item.This research is to find out, how the application of reverse logistics management in utilizing and creating use value from plastic waste. Data collection in this study uses the qualitative method and uses interview, questionnaire, book, observation, media and journal. Based on the analysis carried out, the researcher can conclude that, production activities or recycling processes in creative industries in NGOs to increase use value that is beneficial to the society, if the waste is not recycled, it cannot add value to waste plastic circulating in the society.
Validation of a method for fluid flow rate measurement in square ducts by means of laser velocimetry
Authors: Fabbiano L. , Dinardo G. , Vacca G. 
Published: July 2020

Abstract
The paper deals with the introduction of an alternative method for the evaluation of the fluid flow rate through a square pipe, by directly measuring the flow mean velocity at a fixed location in the section area. The authors of this paper have previously introduced a way for the evaluation of the fluid flow rate, by measuring a single point flow velocity in square pipes. In this study, the authors perform a series of considerations aimed at the validation of the proposed methodology, by comparing it with prescribed procedures described by ISO 3966:2008 standard. In this standard a method for the evaluation of fluid flow rate (under specific fluid dynamic conditions) is stated from velocity measurements performed in a-priori fixed points (in a given test section and to be defined according to the cross-section shape), using a static Pitot-tube (or equivalent equipment). In this work, the authors validate the proposed simplified method against the Log-Thebycheff procedure (according to the same standard). A Laser Doppler Anemometer (LDA) has been used.
2D-2C Particle Image Velocimetry analysis of contra-rotating propellers hydrodynamics
Authors: Capone Alessandro , Maiocchi Alessandro , Mohamed Jais , Tripelli Jonathan , Paolo Romano Giovanni , Di Felice Fabio , Alves Pereira Francisco 
Published: July 2020

Abstract
Contra-rotating propellers represent a non-conventional approach for marine propulsion whose main advantage lies in the increase of propulsive efficiency. This is achieved by recovering part of the energy loss due to the rotational flow generated by a single propeller by means of a contra-rotating downstream propeller. The hydrodynamics of such configuration is quite complex due to the interaction between upstream and downstream propellers and a deep understanding of their features is critical to driving the design phase. In this work a methodology based on planar (2D-2C) Particle Velocimetry is presented to investigate on the flow in the wake of two contra-rotating propellers. An ad-hoc mixed hardware and software phase-locking technique is developed in order to analyze the contribution of each propeller to the overall hydrodynamics of the system.
Comparison of linear methodologies and not for the evaluation of the vibrational morphodynamics of a pair of gears in different tribological conditions
Authors: Niola V , Quaremba G , Cosenza C , Russo L , Savino S 
Published: July 2020

Abstract
The gear wheels are the most common mechanism for the transmission of the torque between two organs. The tribological conditions can compromise both their performance and lifetime. Vibration analysis is a valid tool for the assessment of the health of a mechanical system. The following work illustrates a non-linear methodology for evaluating the vibrational dynamics of a single pair of gears, under different tribological conditions. The proposed methodology highlights the presence of damage on the surface of the teeth of the gear pair and evaluates effect on micro-vibratory dynamics due to different lubrication and rotation regimes. Once the vibratory dynamics features of the structure are known, a statistical model has been developed capable of classifying the different tribological regimes.
Design and development of innovative FBG-based fiber optic sensors for aerospace applications
Authors: Dalla Vedova M D L , Berri P C , Maggiore P , Quattrocchi G 
Published: July 2020

Abstract
In recent years aeronautical systems are becoming increasingly complex, as they are often required to perform various functions. New intelligent systems are required capable of self-monitoring their operation parameters, able to estimate their health status, and possibly perform diagnostic or prognostic functions. For these purposes, these systems frequently need to acquire several different signal types; although it is sometimes possible to implement virtual sensor techniques, it is usually necessary to implement dedicated sensing hardware. On the other hand, the installation of the required sensors can, however, significantly increase the complexity, the weight, the costs and the failure rate of the entire system. To overcome these drawbacks, new types of optical sensors, minimally invasive for measuring the system parameters and having a high spatial resolution and a minimum added complexity are now available. Fiber Bragg Gratings (FBGs) sensors are suitable for measuring various technical parameters in static and dynamic mode and meet all these requirements. In aerospace, they can replace several traditional sensors, both in structural monitoring and in other system applications, including mechatronic systems diagnostics and prognostics. This work reports the results of our experimental research aimed at evaluating and validating different FBG installation solutions such as deformation, bending, vibration, and temperature sensors. These were compared with numerical simulations results and measurements performed with traditional strain gauges and accelerometers.
Inferring laminar burning properties from spherical expanding flames: the pitfalls of an established approach
Authors: Moccia V , D’Alessio J , Rispoli N 
Published: July 2020

Abstract
The procedure of deriving laminar burning parameters from high-speed, high-resolution shadowgraph recordings of spherical expanding flames allows to obtain experimental data in lifelike conditions of high pressure and temperature. Straightforward in principle, relatively simple to implement, the approach has been applied in several labs worldwide, to the extent of achieving a “common practice” status, sometimes resembling a codified protocol. Simple as it may look on paper, yet the technique hides a number of pitfalls, which can impair the end result. After the introduction of solid-state high-speed cameras (CCD, then CMOS), gathering high-speed videos of single combustion events became a breeze: this, along with the possibility of easy stockpiling of data, lend to underrate data analysis: sort of trading the accuracy of measurement for the repeatability. Another critical phase is dealing with the stretch, which affects any real flame: measured data must be processed to obtain the unstretched flame speed and, ultimately, the laminar burning velocity. The relationship between flame speed and stretch will be discussed, being a key factor for the deconvolution of experimental, stretch-affected data. In the present work a critical discussion is proposed, from experimental data acquisition and processing to stretch analysis: the underlying hypotheses of each step will be used as the guidance to a “good” rather than “common” practice. Reference will be made to a specific test case: the combustion of CH4 in air at P0 = 6 bar, spanning the whole flammability range.
Influence of Heat Reflective Wall on Air Conditioning Energy Consumption of Office Buildings in Chongqing
Authors: Hao ZhongYu , Shi DaChuan , QianKun Hou , Wang ZhiQiang 
Published: July 2020

Abstract
As the main channel of heat and humidity exchange between the building and the external environment, the improvement of the thermal insulation performance of the external wall is crucial to reduce the building energy consumption. However, the influence of heat reflective exterior walls on the energy consumption of air conditioning is rarely studied. This paper aims to study the effects of heat reflective walls on air conditioning energy consumption (ACEC) through testing and simulation. The measured results show that the heat reflective exterior walls will reduce the summer ACEC of the room and increase the ACEC of the room in winter, but the contribution rate is higher in summer than in winter. At the same time, the ACEC simulation results show that the energy saving per unit area of the heat reflective wall of the office building is 0.0149 kWh/(m2•a) for the west outer wall, 0.0131 kWh/(m2•a) for the east outer wall, 0.0121 kWh/(m2•a) for the south outer wall, and 0.0113 kWh/(m2•a) for the north outer wall. These provide a useful reference for the research and application of heat reflective walls in Chongqing.
Maximizing the ENVI-met Capability of Modelling the Mean Radiant Temperature of a Tropical Archaeological Site
Authors: Binarti F , Koerniawan MD , Triyadi S , Utami SS 
Published: July 2020

Abstract
ENVI-met is one of the most widely-used outdoor microclimatic models. Since previous studies found that ENVI-met tends to overestimate the MRT, this study attempted to maximize the ENVI-met capability of modelling the MRT in order to obtain accurate simulation results. This study developed three variations of the 3D-model and employed some features to improve the large MRT discrepancy between the field measurement and simulation that resulted from the preliminary model. The field MRT measurements were conducted using a globe-thermometer method on two hot days, i.e., September 21 and October 17. After comparing the results of field measurements and simulations, this study came into a conclusion that the current free version software is capable of performing MRT predictions with a low discrepancy (5%) by using “Solar Adjustment Factor” and “Cloud Conditions” features (19.7% improvement), and maximizing the spatial resolution. The spatial resolution in z-axis decreases the discrepancy by 2.5%.
Industrial Validation of Lead-plated Aluminum Negative Grid for Lead-acid Batteries
Authors: Yang Tong , Qian Shengqiang , Xin WU , Wang Zhenwei , Yuting LUO , Junyong YE , Chuanyun WAN , Wei YAN 
Published: July 2020

Abstract
Aluminum metal grids as lightweight substitutes for lead grid are promising to achieve the overall weight reduction of lead-acid battery for increasing energy density without sacrificing charge/discharge and cyclic performance. In this paper, a dense lead layer with an average thickness of 40 μm is industrially electro-deposited onto aluminum grid with a pre-plated nickel interlayer as the negative electrode for lead-acid battery. The charge/discharge tests with such an grid as negative plates show that the false welding between the lead-plated aluminum grid and lead busbar is an important challenge due to the thin plated lead layer, which would be a potential long-term risk for the charge step and sulfation. From dissection of the failed battery, it is found that the dense lead layer is partially corroded by sulfuric acid and aluminum substrate is partially dissolved into the electrolyte. Sulfation at such a negative electrode brings about a dense and sticky layer composed of the mixed PbSO4 and Al2(SO4)3·18H2O, which is the main failure mode of the lead-acid battery. This industial validation demonstrates that lead-deposited aluminum grids are not feasible at negative electrodes of light-weight lead-acid batteries from the viewpoint of commmercial reliability.