bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of possibility of using axisymmetric body as heat sink for cooling machine parts
Authors: Palii A , Tolmacheva L , Novoselova T , Akopdzhanyan J
Published: December 2020

The paper presents the results of the study of possibility using a body with an optimized shape with a minimum aerodynamic drag force as a heat sink in a convective gas flow for cooling machine parts. The relevance of cooling or heat sink systems for mechanical engineering is not in doubt. Maintaining the optimum thermal state of machine parts within the specified limits is necessary to prevent heating, which can cause violations of normal operating conditions, and, as a result, increased wear, jamming and breakage of parts. To ensure the normal operation of the system, it is necessary to cool the parts contacting the hot gases, removing heat from them to the atmosphere directly, or using an intermediate body (water, low-freezing liquid). Heat sink is an aerodynamic process, a process of heat mass transfer of a substance, and aerodynamic characteristics and, in particular, the nature of streamlining of bodies of the simplest forms are of great scientific and practical interest. Bodies of complex shape can always be represented as a combination of simpler ones, for which it is easy to explore and calculate the flow paths, on the basis of which analytical methods for calculating aerodynamic characteristics are compiled. A computational experiment was conducted in the software product Ansys Fluent. The conditions of the experiment (comparison of heat removal bodies) during numerical modeling are the preservation of constants: the volume and shape of the working zone; distances from the sources, drains and centers of bodies; aerodynamic flow rates; masses of compared bodies; thermal power of the source and other parameters in addition to the shape of the surface. The resulting optimized shape of the body coincides with the current lines, which is the main advantage, since no separation from the surface is observed when streamlining the flow. Thus, the entire surface area will be the effective surface area of the heatsink as opposed to other known shapes of bodies, whereby the temperature of the heat loaded element placed in the center of the heatsink will decrease.
Influence of gas-dynamic characteristics of a wide-range engine on energy-information exchange during flights at high supersonic speed
Authors: Kaun Yu V , Chernyshov M V , Yatsenko A A
Published: December 2020

Using a conical nozzle as an example, the gas-dynamic and thrust characteristics of high-altitude nozzles are studied in a wide range of atmospheric pressures. A geometric model of the nozzle block and the computational domain is developed in a two-dimensional axisymmetric formulation. A calculation was carried out with setting the parameters of the standard atmosphere in the altitude range from 0 to 80 km. In one of the parts of this work, the most common shock-wave structures (triple configurations of shock waves) that arise during flights at supersonic and high supersonic speeds are considered, during jet outflows from propulsion systems. We also studied the influence of the extreme values of the discontinuities of the flow field parameters on the transmitted electromagnetic signals.
Aerodynamic model of centrifugal cleaning in a once-through cyclone
Authors: Lisin A , Moliboga A , Lyovochkina N
Published: December 2020

This work examines aerodynamic modeling of the process of air cycloning in a direct-flow cyclone. The most important technological operation in the food industry is to achieve a high degree of dusty air purification. The practice of operating cyclones testifies to the discrepancy between the actual efficiency of the apparatus and the real capabilities of dust collecting installations. The modern development of industry is characterized by an ever-increasing intensification of various technological processes, which is accompanied by significant dust formation. The problem of collecting dust affects almost all branches of modern production. These are the production of building materials, metallurgy, woodworking, chemical and food industries. In this regard, the problem of maintaining the cleanliness of the air basin of cities arises, and increased requirements are imposed on dust-collecting equipment. Along with the requirement to ensure minimum dust emissions, dust-collecting equipment should be completely reliable for a long time of operation and not require large costs for installation and maintenance. For dust collection of dust, cyclones are now widely used, the principle of which is based on centrifugal separation of the mixture. In the food industry, the most widespread are cyclones of spray units “Niro-Atomizer”, “VRA-4”, “Nema-500”, A1-ORCH. The cyclones of the listed installations differ from each other in the number of devices installed in the dust collection system, design features and aerodynamic modes of air purification.
Simulation modeling of the soil flow movement process in the air, supplied by a ground gun while extinguishing a forest fire
Authors: Gnusov M A , Drapalyuk M V , Popikov P I , Druchinin D Yu
Published: December 2020

The article presents a technological scheme of the operation process of a soil-throwing unit, which has a milling-throwing working body and a guiding casing, and a developed simulation model of the process of movement in the air of a directed flow of soil particles supplied by a soil launcher when extinguishing a forest fire. The aim of the study is to assess the influence of soil and air flow parameters on the indicators of its suitability for extinguishing a ground forest fire by using simulation modeling of the process. The study of this work covers the process of flow, which received the necessary impulse from the milling cutters of the soil launcher. The theoretical description of this direction of research is complex, since it considers both the packing of flying particles and individually detached spherical elements that come into contact with air particles, also presented in the form of discrete elements. As a result of modeling the movement of soil in the air, a vertical cut of the system of fragments of soil and air, graphs of dependences on time, the average distance between soil elements and the average resistance force of the air environment were obtained.
Development of a gimbal for the Parrot Sequoia multispectral camera for the UAV DJI Phantom 4 Pro
Authors: Kurbanov R , Litvinov M
Published: December 2020

Crop monitoring with air monitoring tools on the basis different types of unmanned aerial vehicles with a payload allows to identify problem areas in the field and make timely management decisions. Such complexes suggest a simple and cheap method to method of collecting information about agricultural biological objects. Every season, due to the lack of timely and accurate information about the condition of farmland, agricultural producers lose profits. The use of UAV platforms in agriculture ultimately allows to predict yields and reduce losses. Consequently, the integration of multispectral cameras on UAVs becomes an actual and important task. The main goal of this work is to develop a gimbal for installing the Parrot Sequoia multispectral camera on the DJI Phantom 4 Pro UAV and connecting it to the standard power plant. During the development, a gimbal was made that takes into account all sensors and has dampers for the camera, a method for powering a multispectral camera from the UAV’s onboard power supply, flight tests were conducted that showed stable work of the UAV with additional attachments.
Design of a threshing apparatus of the combine harvester of a new generation
Authors: Kuzin G , Egorov M , Mamchits N , Egorova R , Ishchenkova V , Atrokhov A , Ugrekhelidze N
Published: December 2020

A patented, field-proven threshing and separating device for a combine harvester, created taking into account the elasticity and discreteness of the steams, fractionation and transparency of the layer in the threshing space, is proposed.
New Methods of finding support planes of cut-level fuzzy power sets and Geometry of the convex fuzzy power sets
Authors: Gadjiev Djavanshir , Rustanov Aligadzhi
Published: December 2020

The concepts of the convex fuzzy power sets and crisply defined membership functions in fuzzy set theory are important to deeply analyze to look further for more precise solutions of the fuzzy mathematical programming problems. The Extension principle was defined in terms of the level cuts of the membership functions. The theorem of the decomposition proves the existence of the fuzzy power set as the union of all level cuts of membership function. The Convexity of the level cut fuzzy set was determined at the points of the universe, where the membership function is approximated. The Theorems of the convex and quasi-convex fuzzy sets extend and expand the extension principle to the higher quality to look for more precise solutions of fuzzy problems beyond the support planes. The Fuzzy geometry and topological categories researched further to arrive to the newest Lemma for the cyclic quadrilateral convex fuzzy sets. The analytical and graphical representation of modeling with membership functions type I through types 6 are investigated to the point to be highly recommended in engineering problems by using heuristic methods and models.
Controlling the characteristics of the hybrid bearing by means of an electromagnetic actuator
Authors: Bondarenko M E , Polyakov R N , Shengbo L
Published: December 2020

The increase in the power and efficiency of the newly developed rotating mechanisms is inextricably linked with the growth of their rotation speeds and the overall level of vibration. Gas-dynamic foil bearings have a higher priority for use in high-speed mechanisms due to their practically unlimited maximum speed, the absence of an additional lubrication system, low friction power losses, etc. However, increased friction and low load-carrying capacity during the start-stop period is a problem for the further application of gas-dynamic foil bearings. The hybrid bearing studied in this work includes a rolling-element bearing, a gas-dynamic foil bearing and actuators. The hybrid bearing studied in this work includes a rolling-element bearing, a gas-dynamic foil bearing and actuators. Actuators allow during operation to switch from one type of bearing to another, as well as to control the radial gap of the gas-dynamic foil bearing, changing the dynamic characteristics of the hybrid bearing. The new designed hybrid bearing was manufactured and tested on a rotordynamic test rig in this study. A theoretical model of the hybrid bearing rotor system was built and demonstrated by the experiment results.
Utilization of industrial waste in the urban environment
Authors: Maryeva E A , Popova O V , Pavlikov A V
Published: December 2020

The article discusses promising technologies for the process of utilization of industrial waste in an urban environment. Statistical data on waste accumulation in Russia, volumes and methods of their utilization are presented. The main world trends in the field of industrial waste disposal in the urban environment and the possibilities of their implementation in Russian cities are considered.
Modes of operation of toll gate lanes on toll roads
Authors: Dombalyan A , Shatalova E , Semchugova E , Solodovchenko I
Published: December 2020

The article presents a detailed analysis of the modes of operation of toll gate lanes on toll roads. The toll gate lane has such operating modes as manual and automatic. Also, the lane can work in free mode – any vehicles can pass without classification and payment. The lane in closed mode does not accept vehicles. Ways of charging for each option are described, namely manual, automatic, and electronic. The stages of passing through the lane in different modes and their transport capacity are presented. The characteristic features of toll systems are highlighted and described. The purpose of the lane equipment elements is to control the flow of vehicles through the toll gate, as well as to accept tolls using various payment methods. The selection of toll system and locations of toll gates is based on an assessment of economic feasibility and taking into account the estimated traffic and traffic flow structure, the number and location of traffic interchanges. Special attention is paid to the criteria for selecting a toll system, which is to maximize profits from the operation of a toll road.
RETRACTED: The purpose and objectives of the labor protection service at the enterprise
Authors: Pushenko S , Staseva E , Trushkova E , Kvitkina M , Litvinov A
Published: December 2020

The main goal of improving working conditions is to achieve a social effect, i.e. ensuring labor safety, preserving the life and health of workers, reducing the number of accidents and diseases at work. Improving working conditions also yields economic results: an increase in profits (due to an increase in labor productivity); reduction of costs associated with compensation for work with harmful and difficult working conditions; reduction of losses associated with injuries, occupational morbidity; decrease in staff turnover, etc. The main document in the normative and technical documentation is the normative act “Occupational safety standards system”.
Analysis of the behavior of epoxy composites with carbon nano additives under the influence of high temperatures on fires
Authors: Borisova V A , Davidenko A S , Egorov A A , Totsky D V
Published: December 2020

The results of research on the thermal stability of epoxy resins modified with carbon nanomaterial as polymer composites matrices are presented. It is shown that modification of binder component of composite materials at deposition of carbon nanomaterials leads to improvement of thermal stability, including decrease of intensity of crystal lattice destruction, decrease of amplitude value of thermal effect, increase of duration of oxidation of material at high temperatures, promotes stable formation of heat-protective and insulating carbonized layer.
The dependence of the quality of soil treatment on the parameters and operating modes of the working bodies of the cutter
Authors: Latypov R , Kalimullin M
Published: December 2020

The purpose of the field research was to verify the theoretical assumptions, calculations and comparative tests in the economic conditions of the mill. The object of research was a milling cutter with a horizontal axis of rotation of working bodies. The dependence of the quality of soil treatment on the parameters of the cutter: the speed of the unit, the circumferential speed of the knife, the depth of soil treatment is determined. Regression analysis methods are used to search for a regression equation that adequately describes the quality of soil cultivation from the studied parameters. It was found that the values of the homogeneity of the fractional composition of the soil during processing by the working bodies of the cutter meet the agrotechnical requirements at the values of the kinematic parameter λ=4 and the processing depth a=0.14 m. The best indicators of the fractional composition of the soil were obtained when the drum diameter D=0.4 m and the number of cutter knives in one plane Z=3-4 PCs. The purity of tubers in the combine hopper ranges from 10 to 30%, which is 1.5 times lower compared to the control area.
Escalation quality of wooden beams as building construction with densification technology
Authors: Rilatupa James , Samosir Rahmad , Napitupulu Sally S.
Published: December 2020

In this research has done the densification process of jabon wood and its measuring 5/7 cm into 5/5 cm by heat compression. The research objective determines the reliability of wood densification technology as improving the physical and mechanical wood properties. This research also used U steel as a tool press. The results showed that densification in jabon wood can improve its physical properties as indicated by the increase in specific gravity amounted to 28.95 percent; its density increased 26.83 percent; as well as water content declined of 32.68 percent. The mechanical properties of jabon wood shown by parameters like the strength perpendicular to fiber increased to 51.44 percent; MOE increased to 32.93 percent, and MOR increased to 36.14 percent. Treatment of densification on jabon wood has increased the strong class of jabon wood from strength class IV into a strength class III based on specific gravity and value of MOR rise to strength class II. Densified jabon wood is suitable for use as building construction materials and gives its aesthetic value because its color is more attractive. The architectural design of urban buildings can also use the densified wood material as it proves to
Decision Making Application for Housing Development Investment
Authors: Immanuel Harun , Asriningsih Pranoto Wati , Setiadi Mark
Published: December 2020

The need for housing in Garut is increased from time to time, besides of that the form of the houses was abstract and spread organically therefore to maximize the amount of housing construction and improves the quality of Garut residence those houses expected to be arranged systematically. Those organic spread houses established without valid permits become a polemic to build a neat and clean housing development. The dispute problems are expected to be answered by the Vroom Yetton Group Based Type 2 method to prevent disputes between developers and local inhabitants. Unit configuration affects the saleable area and expected to gain maximal value due to the limitations and existing landforms. Neat Housing Development intends educating people who are accustomed to living in organic housing into systematical housing and to improve the quality of life for the community and the value of the houses units. Therefore there are 3 alternatives to choose; skip the disputes area and build housing on the available area, spend amount of money to the disputes area for compensation, or build the whole area and give some of the houses to the existing local inhabitants. Those alternatives might be answered by analyze each of their net present value, payback period, and internal rate of return.
Development of WBS Dictionary and Checklist Based on WBS of Railway Construction for Safety Planning
Authors: Aryanto D V , Supriadi L S R , Latief Y
Published: December 2020

Railroad construction works are common in developing or developed countries throughout the world. Railroad construction work is a complex project. Inside, there are work activities that can be disrupted due to work accidents. Work accidents that occur can be detrimental to the project. Therefore, to prevent accidents, it is necessary to develop a WBS dictionary and checklist on railroad work for OHS planning. The need for a standardized WBS dictionary and checklist of WBS in preventing work accidents is very important. This study discusses OHS planning by developing a WBS dictionary and checklist on railroad work using expert validation methods and interviews using a questionnaire with descriptive statistical analysis of data. With the development of the WBS dictionary and checklist for OHS planning, project stages will be obtained in detail that can be used to analyze work packages, specified methods, activities, and resources. So that it can reduce and even nullify the risk of work accidents (zero accidents) in the implementation of construction projects.
Investment analysis of boarding house in tanah abang district
Authors: Pramudita Arnold , Asriningsih Pranoto Wati , Setiadi Mark
Published: December 2020

Shelter is one of the basic human needs, including in Indonesia. Shelter can be a boarding house, apartment or hotel. Therefore, there are many investors competing to accommodate these needs because there is opportunities in the investment. Especially in Tanah Abang District, Central Jakarta, which is rapidly developing in boarding house construction. In investing, a feasibility study in financial side is needed that will be faced with uncertainty. This study aims to conduct an investment analysis by analyzing the configuration of boarding room units to maximize the profit using Linear Programming method then to do a risk analysis using the Monte Carlo simulation method to determine the probability of investment success rate. The result of this study shows the best configuration are 2:1:1 for type A: B: C units, with a Net Present Value < 0, Internal Rate of Return < Minimum Attractive Rate of Return, and Payback Period < 15 years. There are < 50% of investment success rate.
Guidelines for Concept of Settlement Design with Digital Infrastructure Facilities
Authors: Mulyana Indra , Lianto Fermanto , Gunanta Surya
Published: December 2020

Changes in technology are currently developing very rapidly and dominate the lives of millennials in the industrial revolution era 4.0. Changes in settlement design are needed to keep up with technological changes through digital infrastructure facilities. The design method used is digital performance form, hi-tech architecture design concepts. The resulting design hopes to be able to optimize the function of macro and micro integrated spaces from the completeness of digital infrastructure to develop smart, independent, and sustainable settlements. Four design concepts guidelines were produced, namely: efficient, flexible, and practical design concepts, 3-dimensional visual, compact, and integrated.
Recognition of Pedestrian Traffic Light using Tensorflow And SSD MobileNet V2
Authors: Evan  , Wulandari Meirista , Syamsudin Eko
Published: December 2020

As a government needs to facilitate the whole public including traffic public facilitate. A pedestrian traffic light should be perceived by pedestrian to safe them to cross the street including someone with the vision deficiency problem. Nowadays, a technology supports human being to build some innovations or application more practical. An innovation which adopt the computer vision and deep learning technology can be built to recognize the pedestrian traffic light which is portable and practical in the context of light computing. The paper aim to evaluate threshold value and data parameters to recognition pedestrian traffic light by Tensorflow and SSD MobileNet V2. The sample are green light and red light on pedestrian traffic light. Based on result, more number of data train than data test and higher of threshold value, the accuracy obtained is more better. Object detection accuracy level reaches 97,98%. On the other result, earphone can produce sounds based on detected objects with output accuracy level reaches 100%.
Analysis of LED Luminer for Street Lighting Based on lamp Housing, Drivers and Optics to get Luminous Efficacy
Authors: Setyaningsih Endah , Calvinus Yohanes , Sabtalistia Yunita A.
Published: December 2020

This study aims to determine whether the lights on street lighting can be optimized by changing the lamp housing, LED electronic drivers and even the use of optical lenses to make lighting brighter and save energy. Assisted by a partner making street lighting by providing a few examples of experiments that have been carried out by these partners to be able to do an analysis of the products that have been produced and made by these partners. Its production is CSL14 code which has a tendency to use glass as a function to protect the LED chip, but it turns out the glass actually reduces the intensity of light. CSL19 code is starting to appear there is an update by using optical lenses with anti-dust and waterproof materials, it seems that the intensity of street lighting can be more optimally. CSL19 product is proven better than CSL14. Based on measurements it was found that the use of optics can increase optimization and lighting can be more scattered. The use of glass lampshades actually also proved to have worse consequences than the measurement of light intensity on CSL19. CSL19 products are equipped with LED driver technology that is able to do adjustable dimming so that the light intensity is proportional to the desired power.
Performance of Generator Translation and Rotation Motion on Vertical Direction for Sea Wave Power Plant
Authors: Indriani Anizar , Suhartini Yeni , Hendra  , Hernadewita  , Rispandi
Published: December 2020

The generator has been used in the sea wave power plant to converting mechanical energy into electrical energy. Generator for sea wave power plant depends on the motion as translation and rotation. For position of trust force direction is horizontal and vertical motion. Generator translation and rotation consists of several components such as rotor, stator, frame holder of generator, shaft, piston and etc. In previous study, the generator translation and rotation motion in horizontal direction was used for sea wave power plant [1]. The results show that the performance of generator is depend on the stiffness of frame holder of generator, number of coil (pole) and magnet, material of pole and magnet and etc. The design frame holder of generator translation and rotation motion in horizontal direction is less rigid (stable) and precision, thus affecting the performance of the generator. To overcome problem in the frame holder of generator translation and rotation in horizontal direction, frame holder of generator vertical direction mechanism are used in this research and performance of generator is output like output voltage and power of generator. Input power of generator by using manual process (rotated by hand) and rotation speed of thrust force of generator is 100 rpm to 200 rpm and using load by lamp 16.6 ohm (12 w). Generator holder design made with 900 inclination conditions in order to straight or perpendicular to the motion generator components. By applied separate of experimental of generator translation and rotation motion obtained the results of experimental tests voltage generator without the load for generator translation motion is 42.7 volts at 200 rpm and for the generator rotation motion of 77.4 volts. By applied load, the maximum value of output voltage generator becomes decrease is 31.14 volt for generator translation and generator rotation is 36.82 volt.
Implementation of rotary parking system model using wi-fi as transmission media
Authors: Hugeng Hugeng , Purwo Putranto Abia Deo , Candra Henry
Published: December 2020

The increasing population in Indonesia affects the increase in private and public vehicles. This increase in vehicles causes various problems, one of which is the need for parking space. The need for parking space raises various other problems, namely, the reduction in green open land and rampant illegal parking on the side of the road which often causes congestion. Then we designed and implemented a model of the rotary parking system using Wi-Fi as transmission media. This model is expected to be developed further in solving the problem of parking space requirements. This system begins to work when a user logs in using a previously registered ID and password. The user then selects a particular deck through the built application on the smartphone. The user-selected deck will spin and stop so that the user’s vehicle can enter into. After the vehicle is parked, the user reconfirms the control device and the security password will automatically be sent to the user’s smartphone. To pick up the vehicle again, the user will enter the given password into the control device.
Utilization of Rainwater Harvesting for Groundwater Conservation in Educational Building
Authors: Lestari Endah , Ageng Kinasti RR. Mekar , Putri Desi
Published: December 2020

This study aims to obtain the optimalization of rainwater harvesting through different technologies, for future groundwater conservation to be used in dry season. This study could demand of human consumption and their activities. The analysis of stormwater run-off volume is used for capacity and quantity of infiltration well. It refers to Standard Depth Calculation from PU (Pekerjaan Umum) of infiltration well. Based on the research results, the infiltration well using porous walls material (permeable wall) with the dimension 1.5x1.5m, permeability coefficient 0,015184 m/hour, rain intensity 0,0115 m/hour, rain duration 60 minutes, the depth of well is 0,889 m. The volume of stormwater in one week with assumming two times rainy days is 4.232 liters. The infiltration well built in the study area was a well with a 2 (two) meters, so that the recharge well discharge obtained 0,216 m3/hour. The excess of stormwater was put into infiltration well is 3,192 liters. If the excess water from rainwater harvesting is accommodated into infiltration wells, must be provided 15 wells with 2 meters depth. If the infiltration couldnot accommodated the excess water, it will flow to city drainage canals. The results of this study are to estimate the potential stormwater volume, the conveyance system and the groundwater conservation system.
Model selection of online motorcycle taxi and motorcycle modes on work trips
Authors: Risdiyanto  , Munawar A , Irawan M Z , Nugraha A A
Published: December 2020

Advances in information and communication technology are driving the rapid development of online transportation. The growth rate of online transportation has an impact on intermodal competition, especially in urban areas. One of the most-used online transportation applications in Indonesia is the online motorcycle taxi. This type of raid-hailing transportation offers flexibility, as it can filter through traffic, and affordable costs, making it a popular mode of transportation for the wider community. It is interesting to find out variables affecting people’s choice of online motorcycle taxi as compared to private vehicles of the same type, namely motorcylce. This study aims to build a mode selection model to compare between motorcycle - as the most widely used mode - and online motorcycle taxi. The data were collected through a home- interview survey of 150 workers in Yogyakarta Indonesia who normally travel to work using motorcycle or online motorcycle taxis on their daily basis. Data analysis were conducted using binary logistic regression in SPSS version 24 and included sociodemographic variables and travel characteristics. The analysis showed that gender, age, number of vehicle ownership, and travel time affected people’s choice on online motorcycle taxi or motorcycle.
The effect of online food ordering to home based and non-home-based trip
Authors: Leksmono Suryo Leksmono Suryo , Vincentius
Published: December 2020

In general, people eat three times a day and in the past they either prepare the meal by themselves or make a travel to find the desired meal. As online transcation (including for food ordering) become more available nowadays, online food ordering may substitute ordinary food purchasing travel. This paper was prepared to reveal factors affecting the preference for online food ordering. 105 respondents were asked to fill online questionnaires. Responses were in Likert scale from 1 (strongly disagree) to 4 (strongly agree). A series of mean difference tests was conducted to compare the responses with 2.5 (the departure from disagree to agree). In general, level of services and level of trustworthiness were affecting the choice for order food online.
Characteristics of grocery and daily needs shopping in Greater Jakarta
Authors: Putranto L S , Dharmowiyono D B E , Anggita P
Published: December 2020

Grocery shopping is an important routine activity. 125 respondents, were interviewed in Greater Jakarta. The collected data were analysed using mean difference t-tests and Pearson correlation analyses. These were to obtain the factors affecting daily grocery shopping location and transport mode. We also would like to observe whether product price, available payment method and type of shops were affecting shopping location. We also want to know what convenience factors affecting shopping location and the characteristics of purchase products. In general, purchased product, shop opening hours, availability of shopping list, transport mode, shop distance from home or office, convenience level, other purchased products besides grocery and availability of restaurant nearby the shop were significantly affecting the choice of shopping location.
The implementation of non-unit-based scheduling method in a housing project
Authors: Christiawan Kevin Natanael , Gondokusumo Onnyxiforus
Published: December 2020

Of the various types of construction projects, contractors often encounter repetitive projects. Many methods have been used for scheduling repetitive projects, but most repetitive scheduling methods have the basis that they are composed of many identical production units. Scheduling repetitive projects using unit-based methods has several constraints such as modeling and applying them to construction projects requiring simplification of repetitive activities to have a single duration and in a fixed production sequence. Therefore, a non-unit-based scheduling method is developed. In this analysis, the project data was obtained from a housing project. Based on the data, an analysis was conducted to look for the effect of changes in the factors used in the non- unit-based scheduling method on the final duration of the project. From the analysis it was found that the factors used in the non-unit-based scheduling method such as duration, priority order of activities, number of resource groups, and relationships between activities greatly influenced the final duration of the project.
Decision Support System Of Food Selection For Obese Sufferer
Authors: Ivandri Yuana Yohan
Published: December 2020

The purpose of making this application program is to facilitate obese sufferers in choosing appropriate foods to be able to regulate their calorie needs. In this application program the Analytic Hierarchy Process (AHP) method is used to determine the weight of each criterion and alternative. In making application programs using the PHP programming language and MySql database. This application program can display the food chosen by the user based on the level of importance for obesity sufferers, so users can easily determine which foods are goodfor their health.
Legal Institution Mapping Information System in DKI Jakarta
Authors: Arda Bily Muhamad , Trisnawarman Dedi , Sutrisno Tri
Published: December 2020

Legal institutions are very important institutions for the community. These legal institutions include the Legal Aid Institute, the Police Office and also the Court Office which have their respective roles in the field of Law. The distribution of Legal Institutions in this Region covers the administrative cities of West Jakarta, South Jakarta, East Jakarta, North Jakarta and Kepulauan Seribu. This Website Application Program was created using the Rapid Application Development (RAD) method. To store data using a MySql database which is operated through a server so that it can be accessed through the internet network. The programming language used is PHP and uses the GoogleMaps API to display map distribution data and locations on website applications. The purpose of this Legal Institution mapping website application system is made to unite various Legal Institutions in one application container so as to make it easier for people living in the DKI Jakarta area to find information and dissemination as well as the Location Map regarding the Legal Institutions they need.
Repair techniques in Underwater Pipelines for Drinking Water
Authors: Suyono Tri , Purna Irawan Agustinus , Asriningsih Pranoto Wati
Published: December 2020

Changes in sea weather, especially the strait facing the open sea, will greatly affect inter-island underwater drinking water pipelines, which can cause damage to pipelines made from Height Density Polyetheline (HDPE). Damage that often occurs is broken or folded, so repairs will be difficult given the position of the damaged pipe is at the bottom of the sea, so that special needs to be repaired. Repairing underwater drinking water pipes is done by lifting pipes from the seabed with floats made of plastic drums. After the pipe is lifted from the seabed to the surface of the sea water the pipe will be connected in accordance with the connection procedure and subsequently drowned again by installing ballast. The length of the pipe raised to the surface of the sea is taken at least 1.5 depth of the sea on the damaged pipe making it easier to repair or reconnect. To lift one side of an underwater drinking water pipe type HDPE PN.10 bar with a diameter of 110 mm that breaks at a depth of 42 m requires a float of 13 units to be installed on a ballast concrete 6 m apart.
Implementation WASPAS For Recommendations On Salary Increases For Employees case study TOKO NASIONAL UTAMA
Authors: Kevin  , Christanti Mawardi Viny , Dolok Lauro Manatap
Published: December 2020

This implementation aims to decide which employees to get salary increases. waspas is one of multi criteria decision making method that using multiple criteria to find the highest value from all data criteria. This implementation number of criteria, criteria weight and level of importance can be changed as needed, in this case data of employees is using from toko nasional utama and criteria, value of criteria, and level of importance was given from toko nasional utama owner. Based the testing result is choose 3 employees with highest value using 5 data of employees and 10 criteria from the owner, the result Nico is 0.8116, Eko is 0.6902, Djajantono is 0.6347. The gap between Nico and Eko or Eko and Djajantono because assessment from owner to employees is different based on their performance and that effected on the result. Based on the result that obtained it can be concluded that waspas can be used for make a recommendations with multiple criteria.
The Development of Android Impossible Platformer Game “My Unfair Adventure”
Authors: Alexander Kevin , Pragantha Jeanny , Andana Haris Darius
Published: December 2020

This game was created using the Unity game engine with C# as its programming language. The goal of this game is to complete all the stages. At each stage, players will face various obstacles such as monsters, traps, and hazards. Testing is done by blackbox testing, alpha testing by the supervisor, and beta testing by 32 respondents through a questionnaire. The test results show that the game My Unfair Adventure can make players annoyed but still encourage them to play again.
Application of online presence and recommendations of students that have a low value using the multi-objective optimization method on the base of ratio analysis
Authors: Tanwijaya Excel , Santun Naga Dali , Christanti Viny
Published: December 2020

As the age of a person makes it easily infected with a disease such as diabetes. In this case, food from a person with a disease must eat food that corresponds to the nutrients needed to reduce the sufferer’s blood sugar levels. Based on the problem, there is a combination of food system to help diabetics in arranging meals according to the sufferers criteria. This system requires criteria for the manufacture of food combinations and using the genetic algorithm method to produce the best alternative of food combinations for diabetics. The result of a combination of food is taken based on chromosome efficiency of genetic algorithm. Accuracy calculation method of genetic algorithm reaches 100% by comparison with manual calculations of the 5 test cases that have been made. From these results can be concluded that the application of the genetic algorithm method is sufficient to help diabetics in the manufacture of food combinations that match the criteria of the sufferer.
On the performance of air conditioner with cold coil for cooling in the condenser
Authors: Siagian Parulian , Napitupulu Richard A M , Sihombing H V , Setiawan Eko Y , Hilton Siahaan Saloom , Sinaga Risma , Anwar Syahputra Syofyan
Published: December 2020

The improvement on living standard of the human makes inefficient energy consumption, like use of air conditioners. Application of utilization cold pipe using condensate water instead of air-cooled condenser is proposed in this paper as an efficient way to solve the problem. Experimental results show that the air conditioning system of the utilization of cold pipes using condensate water-cooled air condenser has a significant effect on the performance improvement of the vapor compression cycle and the rate of improvement is based as ambient air temperature decreases across to hot coil condenser. Power consumption can be decreased up to 6.4 % and total performance can be improved around 7.3% of the system.
Flower of Sphagneticola trilobata (L.) J.F Pruski from Aceh, Indonesia: Antioxidant and Cytotoxic Activity on HeLa Cells
Authors: Mardina V , Mastura  , Hamdani  , Sufriadi E
Published: December 2020

This study evaluated antioxidant and cytotoxicity of methanol extract from flowers of Sphagneticola trilobata (L.) J.F. Pruski. Phytochemical Screening of the flowers exhibited the presence of alkaloid, flavonoid, phenol, saponin, steroid and absent of tannin. The flowers extract also showed good source of antioxidant with an IC50 value of 19.072 μg/ml which was categorized in the range of strong antioxidant activity (<150 ppm). Cytotoxic activity of the flowers against HeLa cell line was found to 331.287 (LC50) or 83% inhibition. The results might suggest/support the flower of S,trilobata as source of natural antioxidant. However, further study about in vivo antioxidant and lethal dose of this sample are recommended.
Effects of Outrigger & Belt Truss System on High-Rise Building Structure Performance
Authors: Morris Donny
Published: December 2020

Using the lateral stiffener system, outrigger & belt truss is one of alternative to reduce the period of fundamental vibrate, displacement, and inter-story drift on high-rise building due to earthquake. The method that used to analysis structure performance, either it used an outrigger & belt truss system or not in post-elastic seismic load condition is nonlinear static analysis with pushover. The result of pushover analysis which shown the performance of building structure when an earthquake occurs, known as performnace based design. This research use 4 models building (A-B- C-D) with 62 floors of tower and 6 floors of podium, has dual system portal combination with particular concrete shear-wall and located in the City of Jakarta which soft soil categorize. Building A doesn’t has outrigger & belt truss, meanwhile building B has it and the material of both buildings are reinforcement concrete structure. Building C doesn’t has outrigger & belt truss, meanwhile building D has it and the material of both buildings are profile steel structure. Seismic load design based on Source Map and Indonesian Earthquake Danger 2017 in analysis was determine as seismic repeat load which has possibility to become bigger during age of building structure (50 years), 2 %. Building A and B has Immediately Occupancy performance level, building C is Damage Control and building D has Immediately Occupancy performance.
Data Prediction For Coffee Harvest Using Least Square Method
Authors: Negara Edi Surya , Keni Keni , Andryani Ria
Published: December 2020

Pagaralam is one of the highest quality coffee producing regions in Indonesia. But the problem that is often found by farmers is the lack of knowledge and predictions about the coffee harvest they will produce in the next period. The solution that can be given is developing an application to be able to analyze and predict coffee yield data for the next harvest period. This study produces a calculation using the Least Square method which can produce a prediction algorithm for coffee yields with the lowest prediction error rate with an MPE of 13.72 and the greatest accuracy using a MAPE of 0.0166 which is implemented in a Coffee Harvest Prediction Application.
Design and fabrication of seat belt-controlled hand brake system with ignition control
Authors: Saravanakumar M. , Prakash S. , Kumar Nidhin S , Gautham B V , Mathew Bijoy
Published: December 2020

Either link or bar linkage is utilized in a hand slowing mechanism to interface the different segments together. The general pattern is to utilize a link for vehicles and vans, and bars just for substantial business vehicles. We don’t change any unique frameworks that are remembered for the vehicle however we incorporate some additional segments into it. As a result of that process changes occurs in the whole safety systems in it. This progression will help the travelers just as the driver to guarantee security while beginning the vehicle from the underlying point itself. In this endeavor a rack and pinion strategy changes over the vertically dropping improvement of the seat strap catch as it is chopped down into rotating development. It is then transmitted to an apparatus joined to the base of the hand brake through a pole. The rigging is associated with a rack. The flat development of the rack is changed over to vertical development used to bolt or discharge the discharge switch of the handbrake switch. Additionally, with the assistance of press switch we can control the start on and off procedure. The LED pointers associated with this press switch will give exact situation of hand brake. Henceforth we can undoubtedly control it and start the vehicle. Rack and pinion has been in presence since the improvement of designing. It is one the most significant and basic segment utilized in building.

We are utilizing rack and pinion component to the hand stopping mechanism to bolt hand brake until the safety belt is locked in. The slowing down power is produced legitimately at each wheel by elite electrical engines and vehicle the executives, that region unit constrained by an ECU. The electronic hand brake replaces the conventional handbrake. It’s worked by a switch inside the middle reassure. The mechanical gadget hand brake gives the ensuing edges over the conventional handbrake: simple use-the hand brake is applied absolutely regardless of the quality of the main impetus. Wellbeing the electrical hand brake applies precisely once the key is off from the start.
Investigation of EDM machining parameters of different volume fraction of WC/Ni composites
Authors: Ashokkumar S , Thiagarajan C , Jose Hitheshu , Aswin Murali P , Jacob Akhil Reji
Published: December 2020

The main objective of this paper is to analyze the machining and mechanical characteristics of Tungsten carbide/Nickel (WC/Ni) composite materials which are produced through the powder metallurgy route. It also concentrates on various parameters such as Percentage of Nickel composition (%Ni) Electrode rotation (S), Pulse on time (T), Current (C) and Flushing pressure (P), Sliding Speed, Contact Load (N), Time (T)of EDM to investigate the process performance characteristics in terms of material removal rate(MRR) and surface roughness (Ra)and also wear rate. From the experimental results it can be observed that increase % of Ni in Composites (WC/Ni), compositions ((85WC-15Ni),(90WC-10Ni),(95WC-5Ni)) the surface roughness and material removal rate which increases gradually. The above condition is achieved when Pulse on time (T), Current (C) and Flushing pressure (P) maintained at constant values. In addition to that surface roughness was analyzed by using response surface methodology. Comparison of the results of un machined surface of WC/Ni composites with EDMed surface was also performed and the worn-out morphologies of WC/Ni composites were analyzed with the help of Scanning Electron Microscope (SEM).