bluuebunny/crossref_metadata_2025 huggingface dataset:
Vacancies and substitutional defects in multicomponent diboride Ti0.25Zr0.25Hf0.25Ta0.25B2: first-principle study
Authors: Matas Martin , Farhadizadeh Alireza , Houska Jiri
Published: November 2021

We study the hard and electrically conductive multicomponent diboride Ti0.25Zr0.25Hf0.25Ta0.25B2 with high thermal stability by ab-initio calculations. We focus on the effect of defects (either vacancies or C atoms, both relevant for numerous experiments including our own) on material characteristics. Different types, concentrations and distributions of defects were investigated, and the configurations leading to the lowest formation energies were identified. We show that the replacement of B by C is more unfavorable than the formation of B vacancies. We show that vacancies prefer to coalesce into a larger planar void, minimizing the number of broken B–B bonds and the volume per atom, while carbon substitutions at boron sites do not prefer coalescence and tend to minimize the number of C–C bonds. We show the effect of vacancies on mechanical and electronic properties, and use the results to explain experimental data.
Spectrometry of pulsed photon radiation
Authors: Behrens Rolf , Zutz Hayo , Busse Julian
Published: November 2021

The energy distribution (spectrum) of pulsed photon radiation can hardly be measured using active devices, therefore, a thermoluminescence detector (TLD)-based few-channel spectrometer is used in combination with a Bayesian data analysis to help resolve this problem. The spectrometer consists of 30 TLD layers interspaced by absorbers made of plastics and metals with increasing atomic numbers and thickness. Thus, the main idea behind the device is the deeper the radiation penetrates—the higher the radiation’s energy when the radiation impinges perpendicular to the front of the spectrometer. From the doses measured in the TLD layers and from further prior available information, the photon spectrum is deduced using a Bayesian data analysis leading to absolute spectra and doses including their uncertainties and coverage intervals. This spectrometer was successfully used in two different scenarios, i.e. for the spectrometry of the radiation field two different industrial type open beam pulsed x-ray generators and secondly in three different radiation fields of a medical accelerator.
Modeling Payne effect on basis of linearization of a visco-hyperelastic model
Authors: Bouzidi Safia , Bechir Hocine
Published: November 2021

The present work concerns the modeling of the Payne effect in nonlinear viscoelasticity. This effect is a characteristic property of filled elastomers. Indeed, under cyclic loading of increasing amplitude, a decrease is shown in the storage modulus and a peak in the loss modulus. In this study, the Payne effect is assumed to arise from a change of the material microstructure, i.e. the thixotropy. The so-called intrinsic time or shift time was inferred from solving a differential equation that represents the evolution of a material’s microstructure. Then, the physical time is replaced by the shift time in the framework of a recent fractional visco-hyperelastic model, which was linearized in the neighborhood of a static pre-deformation. As a result, we have investigated the effects of static pre-deformation, frequency, and magnitude of dynamic strain on storage and loss moduli in the steady state. Thereafter, the same set of parameters identified from the complex Young’s modulus was used to predict the stress in the pre-deformed configuration. Finally, it is demonstrated that the proposed model is reasonably accurate in predicting Payne effect.
Core–shell Cu@C@ZIF-8 composite: a high-performance electrode material for electrochemical sensing of nitrite with high selectivity and sensitivity
Authors: Gao Feng , Tu Xiaolong , Yu Yongfang , Gao Yansha , Zou Jin , Liu Shuwu , Qu Fengli , Li Minfang , Lu Limin
Published: November 2021

Herein, an efficient electrochemical sensing platform is proposed for selective and sensitive detection of nitrite on the basis of Cu@C@Zeolitic imidazolate framework-8 (Cu@C@ZIF-8) heterostructure. core–shell Cu@C@ZIF-8 composite was synthesized by pyrolysis of Cu-metal-organic framework@ZIF-8 (Cu-MOF@ZIF-8) in Ar atmosphere on account of the difference of thermal stability between Cu-MOF and ZIF-8. For the sensing system of Cu@C@ZIF-8, ZIF-8 with proper pore size allows nitrite diffuse through the shell, while big molecules cannot, which ensures high selectivity of the sensor. On the other hand, Cu@C as electrocatalyst promotes the oxidation of nitrite, thereby resulting high sensitivity of the sensor. Accordingly, the Cu@C@ZIF-8 based sensor presents excellent performance for nitrite detection, which achieves a wide linear response range of 0.1–300.0 μM, and a low limit of detection of 0.033 μM. In addition, the Cu@C@ZIF-8 sensor possesses excellent stability and reproducibility, and was employed to quantify nitrite in sausage samples with recoveries of 95.45%–104.80%.
Enhanced switching ratio of sol–gel-processed Y2O3 RRAM device by suppressing oxygen vacancy formation at high annealing temperatures
Authors: Kim Kyoungdu , Lee Changmin , Lee Won-Yong , Kim Do Won , Kim Hyeon Joong , Lee Sin-Hyung , Bae Jin-Hyuk , Kang In-Man , Jang Jaewon
Published: November 2021

Sol–gel-processed Y2O3 films were used as an active-channel layer for resistive switching memory (RRAM) devices. The influence of post-annealing temperature on structural, chemical, and electrical properties was studied. Y2O3-RRAM devices comprising electrochemically active metal electrodes, Ag, and indium tin oxide (ITO) electrodes exhibited the conventional bipolar RRAM device operation. The fabricated Ag/Y2O3/ITO RRAM devices, which included 500 °C-annealed Y2O3 films, exhibited less oxygen vacancy and defect sites, reduced the leakage current, increased the high-/low-resistance state ratio of more than 105, and provided excellent nonvolatile memory properties without significant deterioration for 100 cycles and 104 s.
Micromotion minimization using Ramsey interferometry
Authors: Higgins Gerard , Salim Shalina , Zhang Chi , Parke Harry , Pokorny Fabian , Hennrich Markus
Published: November 2021

We minimize the stray electric field in a linear Paul trap quickly and accurately, by applying interferometry pulse sequences to a trapped ion optical qubit. The interferometry sequences are sensitive to the change of ion equilibrium position when the trap stiffness is changed, and we use this to determine the stray electric field. The simplest pulse sequence is a two-pulse Ramsey sequence, and longer sequences with multiple pulses offer a higher precision. The methods allow the stray field strength to be minimized beyond state-of-the-art levels. Using a sequence of nine pulses we reduce the 2D stray field strength to (10.5 ± 0.8) mV m−1 in 11 s measurement time. The pulse sequences are easy to implement and automate, and they are robust against laser detuning and pulse area errors. We use interferometry sequences with different lengths and precisions to measure the stray field with an uncertainty below the standard quantum limit. This marks a real-world case in which quantum metrology offers a significant enhancement. Also, we minimize micromotion in 2D using a single probe laser, by using an interferometry method together with the resolved sideband method; this is useful for experiments with restricted optical access. Furthermore, a technique presented in this work is related to quantum protocols for synchronizing clocks; we demonstrate these protocols here.
Switchable and tunable linear cavity erbium-doped fiber laser based on FBGs embedded in Sagnac rings
Authors: Yan Gangxiao , Zhang Weihua , Li Peng , Jiang Qiuhao , Wu Meng , Tong Zhengrong , Wang Xue
Published: November 2021

A switchable and tunable erbium-doped fiber laser with a linear cavity based on fiber Bragg gratings embedded in Sagnac rings is proposed and experimentally verified. Due to the stress birefringence effect and the polarized hole burning effect, which are introduced into the single-mode fiber in the polarization controllers (PCs) by the PCs, the designed laser can achieve seven kinds of laser-states output including three kinds of single-wavelength laser states, three kinds of dual-wavelength laser states and one kind of triple-wavelength laser state. The optical signal-to-noise ratios of the output wavelengths are all higher than 52 dB, and the wavelength shifts are all less than 0.04 nm. Furthermore, the temperature tuning of the wavelength range is also researched, which is about 1.2 nm. Due to advantages, such as low cost, simple structure, easy switching and multiple laser states, the designed laser has great application potential in laser radar, optical fiber sensing and so on.
Photonic-crystal-based design and FDTD simulation of all-optical NAND and NOR gates with improved contrast ratio
Authors: Anusooya V , Ponmalar S , Manikandan M S K
Published: November 2021

The proposed research reports the simulation of a photonic crystal (PhC) ring-resonator-based full-optical NAND and NOR gate design. The designed structure comprises a 18 × 30 square lattice dielectric silicon rod-type PhC with a refractive index of n = 3.46. An interatomic distance ‘a’ of 560 nm, radius ‘r’ of 0.21a (0.133 μm) and input wavelength λ = 1550 nm with an input signal amplitude of 1 volt are used in this design. The proposed structure provides two large band gaps in Transverse Electric polarized mode in the ranges of 1342–1980 nm and 758–779 nm. Similar parameters are used for both NAND and NOR logic gate designs. The functionality of the proposed full-optical gates depends on the ring resonator principle and the intensity of the incident light. Numerical analysis of the simulation is based on the finite difference time domain method, whereas band gap analysis is performed using the plane wave expansion method.
Collective modes of type-IIWeyl fermions with repulsive S-wave interaction
Authors: Wang Xun-Gao , Sun Yuan , Liu Liang , Liu Wu-Ming
Published: November 2021

Three-dimensional type-II Weyl fermions possess overtilted cone-like low-energy band dispersion. Unlike the closed ellipsoidal Fermi surface for type-I Weyl fermions, the Fermi surface is an open hyperboloid for type-II Weyl fermions. We evaluate the spin and density susceptibility of type-II Weyl fermions with repulsive S-wave interaction by means of Green’s functions. We obtain the particle–hole continuum along the tilted momentum direction and perpendicular to the tilted momentum direction respectively. We find the zero sound mode in some repulsive interaction strengths by numerically solving the pole equations of the susceptibility within the random-phase approximation.
Spin current transmission in Co1–x
Tb
x
films
Authors: Wang Li , Su Yangtao , Meng Yang , Shi Haibin , Cao Xinyu , Zhao Hongwu
Published: November 2021

We investigate the spin to charge conversion phenomena in Y3Fe5O12/Pt/Co1–x
Tb
x
/Pt multilayers by both the spin pumping and spin Seebeck effects. We find that the spin transport efficiency is irrelevant to magnetization states of the perpendicular magnetized Co1–x
Tb
x
films, which can be attributed to the symmetry requirement of the inverse transverse spin Hall effect. Furthermore, the spin transmission efficiency is significantly affected by the film concentration, revealing the dominant role of extrinsic impurity scattering caused by Tb impurity. The present results provide further guidance for enhancing the spin transport efficiency and developing spintronic devices.
Annihilation diagram contribution to charmonium masses *
Authors: Zhang Renqiang , Sun Wei , Chen Feiyu , Chen Ying , Gong Ming , Jiang Xiangyu , Liu Zhaofeng
Published: November 2021

In this work, we generate gauge configurations with

dynamical charm quarks on anisotropic lattices. The mass shift of

and

charmonia due to the charm quark annihilation effect can be investigated directly in a manner of unitary theory. The distillation method is adopted to treat the charm quark annihilation diagrams at a very precise level. For

charmonia, the charm quark annihilation effect barely changes the

mass, but lifts the

mass by approximately 3–4 MeV. For

charmonia, this effect results in positive mass shifts of approximately 1 MeV for

and

, but decreases the

mass by approximately 3 MeV. We did not obtain a reliable result for the mass shift of

. In addition, we observed that the spin averaged mass of the spin-triplet

charmonia is in good agreement with

, as expected by the non-relativistic quark model and measured by experiments.
Design of an edge TV Thomson scattering diagnostic system on EAST
Authors: Ren M.F. , Zang Q.
Published: November 2021

The study of the edge plasma has significant effect for the performance improvement of magnetic confinement. However, the Thomson scattering system, which has been used to provide electron temperature and electron density on EAST, do not meet the requirements for the edge plasma measurements in measurement region, spatial and spectral resolution. Herein, a TV Thomson scattering diagnostic system has been constructed for the measurements of edge electron temperature and electron density profiles on EAST. A new laser system, optical collection system and data acquisition system are designed to enable the TV Thomson system operate at the measurement region of 0.65–1.1 ρ (“ρ” is the unitary radius in flux coordinate) with spectral resolution of 5 nm and spatial resolution as low as 2 mm. And the theoretical analysis proves that the system has the measurability at electron temperature of 20–1000 eV and density beyond 0.2 × 1019 m-3, which fulfills research of the pedestal microstructure on EAST. The establishment of the edge TV Thomson system can create the conditions for the edge physical study on EAST.
Characterization of a medium-sized CLLB scintillator: single neutron/gamma detector for radiation monitoring
Authors: Pino F. , Fontana C.L. , Delgado J. , Fabris D. , Nebbia G. , Turcato M. , Brunelli D. , Pancheri L. , Quaranta A. , Moretto S.
Published: November 2021

The use of a single neutron/gamma detector is an interesting solution to detect and identify gamma emitters and also special nuclear materials (SNM), being able to discriminate between the two kinds of particles and also to perform good-resolution gamma spectroscopy.
In this framework, we present a comprehensive characterization of a medium sized (2" × 2") CLLB (Cs2LiLaBr6:Ce) scintillation detector, in order to give the necessary information to assess its deployment in applications regarding homeland security and radiation monitoring. In particular, the parameters studied are: energy resolution, full-energy peak gamma efficiency, time resolution, thermal neutron/gamma discrimination capability, decay time of the signals, high counting rate performance and minimum detectable activities (of 137Cs and 252Cf sources). We employed digital nuclear electronics combined with a pulse shape discrimination algorithm to acquire and analyze the data. We compared our results with reported data for smaller CLLB scintillators, finding good agreement. Experiments were combined with Monte Carlo simulations (using GEANT4 v10.6.0 and MCNP5 v1.60) in order to complement the characterization. The obtained results suggest that the 2” × 2” CLLB detector offers better performance with respect to other scintillators of the same size such as NaI(Tl), CsI, CeBr, etc. which are commonly used in a radiation monitoring systems.
Underlying drivers of decade-long fluctuation in the global mean sea-level rise
Authors: Cha Hyeonsoo , Moon Jae-Hong , Kim Taekyun , Song Y Tony
Published: November 2021

Natural climate variability can mask the background trend of global mean sea-level (GMSL) caused by global warming. Recent advances in satellite measurements and ocean heat-content estimates have enabled the monitoring of GMSL budget components and provide insights into ocean effects on the Earth’s energy imbalance and hydrology. We observed a decadal fluctuation in GMSL rise, which coincides with an increasing trend in the 2010s after the warming ‘hiatus’ during the 2000s, and demonstrated that the rate of sea-level rise can be attributed to climate-related decadal fluctuations in ocean heat storage and hydrology. Since ∼2011, the decadal climate variability has resulted in additional ocean mass gain (271 ± 89 Gt yr−1) from glacier-free land water storage and increased ocean heat uptake (0.28 ± 0.17 W m−2), increasing the GMSL rise rate by 1.4 ± 0.4 mm yr−1. The suggested estimates of sea-level and Earth’s energy budgets highlight the importance of natural variability in understanding the impacts of the ongoing sea-level rise.
Environmental attitudes among students of Early Childhood Education program in University of Jember
Authors: Saputri S W D , Budyawati L P I , Aisiyah L N , Widiastuti R Y , Atika A N
Published: November 2021

This study aimed to describe the environmental attitudes of students of Early Childhood Education (ECE) program in University of Jember. Descriptive quantitative approach with survey method were employed. For data collection, the Environmental Attitude Scale were distributed to 102 students of ECE program in University of Jember from 2nd, 4th and 6th semester, with age ranged from 19 – 23 years old. Analysis were done based on mean, standard deviation, maximum and minimum score computation with N=101. The results of this study indicated that (1) Most students of ECE program in University of Jember have general positive environmental attitude, (2) The energy saving is the most concerned environmental issues among the students, and waste products get the least attention. Some additional findings and limitations are discussed.
Masterplan review Kendari heart special hospital-Southeast Sulawesi
Authors: Partogi A , Siahaan U , Eni S P
Published: November 2021

Health problems are a serious problem for all regions in Indonesia, in this case the provision of adequate health facilities to special / specialist hospital services, which have not been evenly distributed to the districts. To overcome this problem, the Southeast Sulawesi Regional Government plans to build a special heart hospital in the city of Kendari, starting from June 2018 to January 2020 through the Southeast Sulawesi Provincial Government’s Regional Budget. The aim of the construction of the Kendari Heart Special Hospital is to provide health facilities in the capital city of Southeast Sulawesi Province, namely Kendari, specifically for heart disease, which will then become a Class A special government hospital in the Southeast Sulawesi Province area. The hospital planning concept is environmentally sustainable development. A review of the hospital’s master plan has been made, starting from the planning stage to land use, space utilization and resource utilization and the survival of the surrounding ecosystem. This research is intended to see the fulfilment of hospital standards that are appropriate as provincial level hospitals, as well as to assess development standards, health standards, environmental standards and review development concepts that refer to the concept of sustainable development.
Performance evaluation of sub ground passive cooling system with Ecotech software simulation (Case study: Pasio Christi Church at Cibunut, Kuningan, West Java)
Authors: Musdinar I , Ardli R A
Published: November 2021

The church in Cibunut, Kuningan, West Java has implemented a sub ground passive cooling system in its renovated building in 2018. This sub ground passive cooling system has not been widely applied in tropical regions, however the church is trying to implement it. This system is supported by making air wells and flowing cold air through distribution pipes into the room. Because not many people have implemented this system, performance evaluation through an ecotect software simulation is used to determine the success of the system in cooling the room. The research was carried out with the following steps: (i) Data collection in the form of CAD drawings of Cibunut Church building, (ii) Simulation using ecotect software, and (iii) Analysis of simulation results with thermal comfort standards in the tropics. The results of this study are conclusions from the results of simulations and analyzes, as an illustration in applying of the sub ground passive cooling system. This research helps illustrate the difference between buildings that have not applied sub ground passive cooling and buildings that have applied sub ground passive cooling.
Perspectives in evaluating pedestrian facility within transit-oriented development context
Authors: Prayogi L , Sari Y , Prima T S
Published: November 2021

Pedestrian facility is widely agreed an important component of transit-oriented development (TOD). The availability and quality of pedestrian facility relates to and affects other aspects of TOD. This article explores the role of pedestrian facility within TOD. This article is written through a literature review on the available body of knowledge regarding evaluation of pedestrian facility by using the concept of TOD as the base and framework for the literature review. It is found that the physical and perceived quality of the pedestrian facility are to be evaluated. It is found that there are some aspects to be evaluated network wide and some other aspects to be evaluated segment wide. Evaluated objects of the mentioned aspects can be analysed using various techniques and tools, including space syntax analysing using DepthMapX and other analysis using spatial analysis softwares. It is concluded that in order to comprehensively evaluate pedestrian facility within TOD context, various types of evaluation need to be carried out.
Social and physical processes in production of urban public spaces case: Development of RPTRAs in East Jakarta
Authors: Simatupang S , Widati G , Erwin B
Published: November 2021

Public spaces in the big city of Jakarta are decreasing from year to year due to the ever expanding physical development. However, since 2015 until October 2019 290 RPTRA units had been built in DKI Jakarta where previously public spaces have not been paid much attention to and have always been defeated by more commercial developments. The objectives of this study are to find what structuring forces affect, who actors were involved in the production of those public spaces, and how they affect physical public spaces at all stages of physical life cycle in different RPTRAs. For those objectives this study used an analytical framework of institutionalist understanding and used descriptive qualitative descriptive approach and chose 4 RPTRAs in East Jakarta as case studies. The results of case studies show there are the structuring forces and the different actors operating in each RPTRA but what are structuring forces and who are the actors are relatively the same in each RPTRA. The results of this study suggest that urban design practitioners need to have greater understanding of the social processes guiding the production of public spaces and need to incorporate such understanding into their practice.
Characteristics of the fortress of Wuna City as a UNESCO cultural heritage
Authors: Suhi L O M R , Ali A , Setiadi G
Published: November 2021

This study uses library research. The data used in this research is secondary data. The data collection technique is carried out by reading, studying, and recording various literature or reading materials, in the form of report documents such as the 2018 Wuna City Fortress Mapping Report by the South Sulawesi Cultural Heritage Conservation Center (BPCB), books, journals, articles, etc, that are relevant to the characteristics of the Fortress of Wuna City which will be related to the theory of the provisions of the OUV (Outstanding Universal Values) assessment by UNESCO. The result shows that the area of the Fortress of Wuna City reaches 265 Ha, so it can be categorized as a monument viz an element or structure. The result of UOV analysis (on the 2nd criterion) shows the value of fort architecture as a strong defense system from enemy attacks. This fort is in the form of a labyrinthine tunnel, built on 2 cliff sides while the slope is between 45–90° with a maximum height of 17.48 m from the ground. On top of the fort’s wall structure, there are 23 bastions as a place to guard the royal soldiers. Apart from that, the fortress of Wuna City also shows the value of urban planning. The people of Muna have known ‘the city’ since 1538. In addition to the fort, supporting facilities that show modern knowledge today is also found in the site.
Design of vertical fisherman village in Penjaringan with sustainable development concept
Authors: Yudha M , Siahaan U , Ismanto R
Published: November 2021

Indonesia is known as an archipelago state that has more than 17,000 islands with a coastline of more than 81,000 kilometers. Therefore, the economic life of the Indonesian nation is largely centered on the coastal areas. Population growth along the coastline has resulted in fishermen choosing to live close to their source of life and building their economy there. Rapid population growth, and the scarcity of available residential land resulted in fishermen building denser settlements, expanding towards the sea and ultimately giving the impression of slums along the coast. It is felt that vertical settlements (flats) will provide solutions to problems in the conditions of these slum settlements. The effort to rejuvenate the fishing village in Penjaringan Village is the topic of this research with the limited vertical settlement approach, which takes into account: behavior patterns, habits, activities and daily needs of fishermen. A vertical development with a limited height is also seen as fulfilling the concept of sustainable development, where all fishing activities can be accommodated on a narrow area of land and do not sacrifice too much open land which is already small in the coastal area. In addition, fishermen’s life and cooperation between them can be facilitated by carrying out a compact upward design. This is one solution that will differentiate this fishing village from other settlements. This development is declared successful if all the goals that have been set together can be achieved and bring benefits to the group of residents.
Betawi arts and culture center with the application of modern tropical architecture
Authors: Nahuway L C , Eni S P , Sudarwani M
Published: November 2021

Jakarta is a city with a wide variety of ethnicities, languages and customs. Likewise with the Betawi culture that grew in the city of Jakarta. Jakarta culture must be distinguished from Betawi culture, Betawi people create Betawi culture, while Betawi culture is an element and supporter of Jakarta culture, conveyed by various other cultural elements found in Jakarta. Some other cultures are the cultures of various ethnic groups residing in Jakarta or national and foreign cultures or international cultures. Traditional Betawi art elements that have been known since ancient times and still live among Betawi people to this day, especially in the outskirts of Jakarta include dance, theater, music, literature and puppetry. Seeing Betawi culture in DKI Jakarta that is increasingly fading, Betawi leaders and elders under an organization called the Betawi Consultative Body (Bamus), urged the DKI Jakarta city government to create a container for the preservation and development of Betawi culture on an ongoing basis. With the application of Modern Tropical Architecture which is expected to make the tourist attractions become more modern but does not eliminate the characteristics of the Betawi culture itself.
Technology 5.0 in architecture based on the understanding of environmentalism
Authors: Napitupulu S S , Hardiman G , Tobing R R
Published: November 2021

Technology that developed rapidly in the late 19th century was the beginning of modern times and brought significant changes in every aspect of human life, including architecture. Starting from technology 1.0 until 5.0, technology still has a role in the field of architecture. On one side, technology offers convenience for humans to monitor buildings through the operating system and increases the value of life through its architectural style which is represented by the construction system and materials. On the other hand, technological developments also present problems. The problem that occurs due to technological development that are experienced globally is environmental damage. The purpose of this study is to determine the appropriate technology for use in buildings based on an understanding of environmental science. This study uses a qualitative method regarding the primary literature from books and journals (national and international). The results of this study concluded that through understanding the science of environmentalism, the basis for creating a design must begin with an understanding of the natural conditions of the design area. Henceforth, technology in architectural buildings is not in the form of mechanical technology that potentially increases the amount of building heat, but rather in technology that supports the natural performance inside the building in the form of wall material, new approach in terms of building openings, development of solar panel, windmills, and chimneys technology.
The application of green building concept through fabrication modular construction system in special house construction
Authors: Hakim H , Endangsih T
Published: November 2021

The cost of housing construction tends to continue to increase and various efforts have been made to reduce the cost of building special houses. One of the technologies chosen in the construction of special houses with a fast process is to use a fabricated modular construction system. The purpose of this research is to produce a technical design for the Special House as a reference in the optimal and efficient physical construction of the Special House. Research and development research methods by way of assessing and testing a product. Product assessment and testing were carried out on 11 manufacturers who fit the criteria and have produced prefabricated / precast houses. After the implementation of primary data collection, it was concluded that there were 8 Manufacturing Modular Construction systems that were likely to be optimally applied to special home products. The conclusion of the research is based on an assessment matrix from the aspects of the work system, time to work, the number of workers, financial, social and cultural as well as zoning, which get the highest score, namely Steel as the main structure. Steel has been tested for its structural strength and can produce quite a number of building material components.
Blind orphanage with blind space approach in Jakarta
Authors: Christover C , Siahaan U , Ismanto R , Ulinata U
Published: November 2021

There are still people with disabilities in society who consider them a burden. However, in fact, every child with special needs such as a blind people has the right to have a decent life like any other community. So, we need an orphanage for the blind people with a blind space approach that aims to provide social services to blind children by helping and guiding them towards reasonable personal development and having work skills, so that they can be independent, live properly and have responsibility, both for himself, his family, and society. This research used a qualitative descriptive method by collecting literature studies from national and international journal articles regarding the blind orphanage, collecting data related to the research location and conducting a comparative study of similar buildings in Central Jakarta. This research resulted in a blind orphanage design with a blind space in Jakarta approach that provides disability facilities for visually impaired people, educational facilities, and activity facilities for visually impaired people. It is hoped that the design of the Blind Orphanage can accommodate the activities of the Blind people in Jakarta.
Hybrid spaces: Sustainable city components in the transit area of Jatinegara Station Indonesia
Authors: Endangsih T , Prayitno B , Kusumawanto A
Published: November 2021

The Jatinegara Transit Area is an area of stations, residences and markets that have the potential to be developed into a Transit Oriented Development (TOD) area. The development aims to create a sustainable city and will become a hybrid area of a new residential ecosystem. In the research location, the rate of urbanization is relatively high which causes social and environmental problems that are very dangerous to the health and welfare of residents. Problems related to the environment include: increased CO2 emissions, loss of biodiversity, air pollution and climate change. Social problems involve the reduced space for interaction between residents due to the fulfilment of housing. Holistic planning is needed to solve this problem, through social and environmental approaches to create a sustainable city by developing a hybrid space model. The research method uses analytical methods (planning documents, design projects and literature), observation methods, comparative methods, etc. The first stage is mapping the existing conditions and the next stage is creating a model that applies a hybrid space. The conclusion of this research is that hybrid space is an alternative to improve air quality and provide public space for community interaction in terms of environmental and social sustainability.
Study of occupants’ perceptions and preferences of smart home system technology at The Eastern Green-LRT City Bekasi Apartment
Authors: Ulinata U
Published: November 2021

The development of technology over the time is increasing rapidly in various fields including in the field of property that applies smart home system. During the Covid 19 Pandemic, residential with smart home system concept deserves to be an option because it can provide convenience for residents in activities and work by arranging electronic devices such as air conditioning, televisions, lights, access in and out of residence. One of them is The Eastern Green LRT City Bekasi Apartment which is a residence with the concept of smart home system. Apart from the purpose of knowing perception and preference of residents to smart home system in Eastern Green-LRT City Bekasi Apartment, there are certainly still weaknesses that are also a consideration for improvement so that smart home system is able to facilitate residents to improve the comfort of residents. This research uses quantitative method by collecting data through survey. The results showed there are several things that need to be useful evaluation materials to improve smart home system. It is expected that this article can provide feedback to realize a more comfortable residence based on smart home system in welcoming the era of society 5.0 and the new normal era.
Environmentally friendly fish processing center in Muara Angke, Jakarta
Authors: Condro B R , Siahaan U
Published: November 2021

Indonesia is the largest maritime country in the world with two thirds of its territory consisting of territorial waters. Indonesia ha more than 17,000 islands, around 5.8 million km2 of sea, and 81,000 km length of coast. Indonesia Ocean is quite extensive and the sea products are quite diverse. Samudera Indonesia produces many types of shrimp, large pelagic fish (Tuna, Sharks, etc.), with a production of 1,076,890.00 tons / year. To realize the vision of the World Maritime Axis, several things must be considered, namely, sea spatial planning and maritime infrastructure and connectivity development. To support this government plan, the author wants to develop the Muara Angke Fish Market, which is the Center for Marine Products Processing at Muara Angke with the Waterfront Themes Approach. Muara angke is a fairly large supplier of marine products in Jakarta. The sea products come not only from the catch of local fishermen, but also from other regional fishermen. Muara angke has become a center for marine product trade, therefore the development of sea product processing has been able to encourage investment and business growth in the field of marine, diverse marine products and diverse processing capable of making Muara Angke as the Center for Processing of Marine Products. Its location on the edge of the sea is also a potential for the application of the Waterfront theme.
Sensitivity analysis on deformation of woven polyethylene formwork
Authors: Leony A , Summakwan K G , Sjah J , Rarasati A D , Purnomo H
Published: November 2021

The use of different material quality and amount can affect formwork performance at the beginning of casting. Practical easy to install formwork such as woven polyethylene with wire mesh reinforcement makes field work easier. Sensitivity analysis on the elastic modulus and the thermal coefficient variables of woven polyethylene, fresh concrete temperature during casting and fresh concrete load model are the objectives of this research. The research is performed by comparing experimental data and the numerical modeling of woven polyethylene formwork using Finite Element Method. The formwork span and width dimension are 1 m x 0.3 m, with a variety of heights namely 0.6 m, 0.45 m, and 0.3 m. The sensitivity value for each variable will be evaluated based on Pearson coefficient or R. The sensitivity analysis of thermal coefficient showed no correlation to changes in formwork deformation. The sensitivity analysis of elastic modulus and fresh concrete temperature showed perfect correlation to changes in formwork deformation although the changes are small (around 0.0003 cm to 0.0006 cm). The fresh concrete load model showed perfect correlation to formwork deformation as well as becoming the determining variable of the changes in the formwork deformation values.
Reducing of total harmonic distortion by simulating passive filters to suppress harmonic currents with the case: Faculty of Engineering Building, Universitas Kristen Indonesia Jakarta
Authors: Prasetyo A D T , Silalahi E M , Stepanus S , Widodo B , Purba R
Published: November 2021

Today’s electrical appliances use power electronics to save electricity. However, this equipment generates non-sinusoidal current, causing wave defect, expressed as total harmonic distortion (THD). As the %THD increases, the greater risk of equipment damage. For this reason, the research was carried out in the Faculty of Engineering Building, Universitas Kristen Indonesia Jakarta (FT UKI Jakarta) where there are many load combinations such as computers, various types of lights, laboratory equipment such as transformers, electric motors and so on. The research was conducted using quantitative method. Data collection is carried out directly in the main panel. Based on the measurement results, the calculation of the maximum load current (IL) and short circuit (ISC) is carried out. Through these values, it can be seen that whether the odd dominant harmonic values and orders meets the IEEE 519-2014 standards or not. Calculations and analysis of the measurement results have shown that the %THDI in the FT UKI building has not meet the standard. Therefore, it is necessary to simulate the filter design to reduce the %THDI, so that the results can meets the IEEE 519-2014 standard, which is below 5%.
Design and analysis of solar cell systems 100Wp in the Study Program Laboratory Electrical Engineering UHN Medan
Authors: Hutapea P
Published: November 2021

Currently, the use of solar cells is being developed as an alternative source of electricity generation. Studies and research are constantly looking for ways to increase the efficiency of using solar cells. This study aims to provide information to students of the Electrical Engineering study program at UHN Medan about the design, manufacture, simulation of the ETAP program, technical and economic analysis. Electrical load capacity in the laboratory room with daily load of 45Wh and peak load of 82 watts. Then the recommended designs are: 100Wp solar panel, BCR 40A, 102Ah battery and 1500VA inverter. The total cost required for the investment period is IDR. 18,954,000. Observations were made by taking light intensity data that occurred for 4 days in the laboratory. The equipment used for this measurement is: a luxmeter for measuring light intensity and a digital multimeter for measuring currents and voltages. The results show that. when the intensity condition is 49.0Klux, the voltage is 12.08VDC and the current is 0.47A. The highest light intensity occurs on the day of August 14, 2020 between 13.00-13.30WIB of 93.0Klux producing a voltage of 12.09VDC and an electric current of 0.90mA.
The influence of Unified Power Flow Controller to increase the value of Available Transfer Capability on transmission system Java – Bali, Indonesia
Authors: Siahaan D P S , Soebagio A , Widodo B , Stepanus S , Sihite E B O
Published: November 2021

Industrial growth and population in Indonesia led to an increase in demand for electricity. It needs a device that can perform a voltage correction profile online so that power will flow through transmission line. TJBTB (Transmisi Jawa Bagian Timur dan Bali) conditions before the installation of UPFC (Unified Power Flow Controller), the power supply received by the load is not 100% obtained from plants in the region, for example the Paiton power plant. In this research, the method used is with the help of MATLAB R2014a simulation by designing a 500 kV transmission system configuration and the placement of the UPFC found in regional IV namely East Java - Bali. From the simulation results, showing that there was a change in power flow when placing the UPFC. The right location is the West Surabaya - Gresik channel. On the Ngimbang bus there is a change in active power which before using UPFC by 1612 MW to 2208 MW after using UPFC, an increase in active power was 36.97%. The UPFC can fulfill all these functions and thereby meet multiple control objectives by adding the injected voltage with appropriate amplitude and phase angle, to the terminal voltage v.
Smart energy monitoring based on IoT Lora-Wan on the campus buildings: Case study Indonesian Defence University (Unhan), Sentul, Bogor
Authors: Ramadhan S , Lisapaly L , Boesrony D
Published: November 2021

Smart building constructions such as Campus Buildings have been designed for use, where the physical structure and system components are interrelated and can maximize functionality for operation and maintenance. So that the Campus building can be used with a longer age. One of the sub-systems that can monitor and notify the range of energy usage on a campus building is a smart electrical energy meter (kWh meter), which is connected to all devices that consume electrical energy in campus buildings. These interconnected smart devices use IoT (Internet of Things) interconnection networks and low power wireless technology (Lora). In a case study of the use of this system at the Indonesian Defense University, Unhan, Sentul, Bogor, West Java, it can be seen how the maximum efficiency in the use of electrical energy can be obtained in the smart campus building construction, which runs automatically.
Re-design stalled solar panel so that can activate water pump for Mentawai community needs especially the middle Siberut sub-district
Authors: Orlando B , Sebayang M D , Samosir R
Published: November 2021

Re-Design Stalled Water Pump in Middle Siberut sub-district to be used again by using solar panel as an alternative energy source. Solar Panels used in this re-design are 48 pieces with capacity 200 WP. Energy produced from solar panels is stored in batteries with capacity 48 volts 400 Ah. Electrical equipment used is still alternating voltage, an inverter is needed so that can change the voltage in the same direction produced on solar panels be alternating voltage which will then be used as a source of electrical energy for activate water pump as well as other electrical equipment.
Re-design the use of PV to distribute water from tanks to rural area for Mentawai especially in Central Siberut sub-district
Authors: Purba R R , Samosir R , Sebayang M D
Published: November 2021

The redesign of the water pump stuck in the district of Central Siberut is reused by using the Solar Panel as an alternative energy source. The materials and tools used are Booster pump, pipe, air valve, wash out, blow off and gate valve. The booster pump is used to pump high pressure water from the tank so that it can reach Saibi village, where Saibi village is the farthest village compared to Simulaklak village, where the distance from the tank to Simulaklak village is only 1.5 km and the tank to Saibi village is 4.5 km the elevation difference between the tank and the village of Saibi is 25 meters above sea level. The total water demand in Simulaklak and Saibi villages is 17.63 liters / second with flow rates in Simulaklak and Saibi villages of 2.25 m / sec and 1.69 m / sec, for the pump head obtained from the tank to Simulaklak village is 72,1 m and the pump head from the tank to Saibi Village is 120.31 m. The standard atmospheric pressure obtained for Simulaklak village is 10,284 mH2O and for Saibi village is 10.301 mH2O. Booster pump is an alternative that can be used for distributing water from the tank to the village.
Analysis the effect of cutting speed on wear and crystal structure on CVD and PVD layer carbide insert materials
Authors: Supriyanto B , Budiarto
Published: November 2021

It has been done analysis effect of cutting speed on wear and crystal structure on CVD and PVD layer carbide inserts has been performed. The purpose of the study was to determine the effect of cutting speed on wear, crystal size, dislocation density and micro lattice strain on CVD and PVD layer carbide insert materials to cut the AMS5643 stainless steel material. CVD and PVD layer carbide insert cutting process with cutting speed variation 113; 126; 140; 175 m/min with cutting motion of 0.38 mm/round and depth of cut 1.5 mm fixed. Wear test results showed that CVD layer carbide insert wear was 15% higher than PVD layer carbide inserts. The results showed that the size of CVD layer carbide insert crystals was smaller than PVD layer carbide inserts by 42% and the dislocation density of CVD layer carbide inserts made no significant difference to PVD layer carbide inserts, as well as micro lattice strains for CVD layer carbide inserts greater than PVD layer carbide inserts.
Diversity and potential utilization of medicinal plants in Way Kambas National Park
Authors: Denny  , Wardani M , Susilo A
Published: November 2021

The lowland forest area of Section I Way Kanan, Way Kambas National Park, possesses abundant medicinal tree species. This study aims to identify the medicinal tree species and their potential uses. Data collection was carried out by an inventory of all tree species by the belt transect method on a 100 m x 10 m. All plants were sampled for the herbarium, recorded, identified, and then analyzed for their usefulness. Data analysis was carried out to obtain the accuracy of scientific names, using the comparative identification approach, comparing herbarium samples from the field with herbarium specimens from Heyne’s collection at the Forest Botanical Herbarium, Forest Research and Development Center, Bogor. The identification results using herbarium specimens recorded 24 medicinal tree species of the 20 genera and 20 families. Based on Heyne’s Herbarium collection, 13 tree species of the 11 genera and 11 families possess the potential for medicinal and food. Among these species, the community still uses medicinal trees, such as Artocarpus elasticus, Baccaurea bracteata, Bouea oppositifolia and Cinnamomum iners. In general, people use medicinal plants when a family member is sick or used as tonics and supplements to maintain endurance.