bluuebunny/crossref_metadata_2025 huggingface dataset:
Spin filtering induced by a magnetic insulator stripe on graphene
Authors: Fuentevilla C H , Lejarreta J D , Domínguez-Adame F , Diez E
Published: April 2021

Proximity exchange interaction between graphene electrons and nearby magnetic insulators paves the way to create spin-polarised currents for spintronics applications. Different ferro- and ferrimagnetic insulators, such as europium chalcogenides, yttrium iron garnet and cobalt ferrite, have been proposed in the literature to induce magnetic correlations in graphene. We theoretically study electronic transport properties of graphene in close proximity to a strip of a magnetic insulator, when the system is connected to nonmagnetic source and drain leads. To this end, we describe graphene electrons by means of an effective Hamiltonian whose model parameters are extracted from first-principle calculations. We compare the spin-polarization of the electron current calculated for a number of different magnetic insulators, aiming at elucidating the effects of the various model parameters on the efficiency of the device. In particular, we demonstrate that the polarization of the electric current across the device can be tuned by the source–drain voltage. We conclude that the heterostructures based on europium chalcogenides are ideal candidates to achieve high polarisation at low temperature.
Deformation parameter changes in fission mass yields within the systematic statistical scission-point model
Authors: Mehdipour Kaldiani Payam
Published: April 2021

The fission fragment mass-yields are evaluated for pre-actinide and actinide isotopes using a systematic statistical scission point model. The total potential energy of the fissioning systems at the scission point is presented in approximate relations as functions of mass numbers, deformation parameters and the temperature of complementary fission fragments. The collective temperature, T
coll, and the temperature of fission fragments, T

i
, are separated and the effect of collective temperature on mass yields results is investigated. The fragment temperature has been calculated with the generalized superfluid model. The sum of deformation parameters of complementary fission fragments has been obtained by fitting the calculated results with the experimental data. To investigate the transitions between symmetric and asymmetric modes mass yields for pre-actinide and heavy actinides are calculated with this model. The transition from asymmetric to symmetric fission is well reproduced using this systematic statistical scission point model. The calculated results are in good agreement with the experimental data with T
coll = 2 MeV at intermediate excitation energy and with T
coll = 1 MeV for spontaneous fission. Despite the Langevin model, in the scission point model, a constraint on the deformation parameters of fission fragments has little effect on the results of the mass yield.
Influences of flexible defect on the interplay of supercoiling and knotting of circular DNA*
Authors: Xiong Caiyun , Nie Xiaolin , Peng Yixue , Zhou Xun , Fan Yangtao , Chen Hu , Liu Yanhui
Published: April 2021

Knots are discovered in biophysical systems, such as DNA and proteins. Knotted portions in knotted DNA are significantly bent and their corresponding bending angles are comparable with or larger than the sharp bending angle resulting in flexible defects. The role of flexible defects in the interplay of supercoiling and knotting of circular DNA were predicted by a Monte Carlo simulation. In knotted DNA with a particular knot type, a flexible defect noticeably enhances the supercoiling of the knotted DNA and the decreasing excitation energy makes the knotted portion more compact. A reduction in twist rigidity and unwinding of flexible defects are incorporated into the numerical simulations, so that interplay of supercoiling and knotting of circular DNA is studied under torsional conditions. Increasing unwinding not only results in a wider linking number distribution, but also leads to a drift of the distribution to lower values. A flexible defect has obvious effects on knotting probability. The summation of equilibrium distribution probability for nontrivial knotted DNA with different contour length does not change with excitation energy monotonically and has a maximum at an intermediate value of excitation energy around 5k
B
T. In the phase space of knot length and gyration radius of knotted DNA, knot length does not anticorrelate with its gyration radius, which is attributed to the flexible defect in the knotted portion, which leads to the release of bending energy and inhibited the competition between entropy and bending energy.
Electrochemical Stability of Poly(3,4-Ethylenedioxythiophene) Derivatives Under Cell Culture Conditions
Authors: Pan Qichao , Zhang Zuwei , Zhang Yaqiong , Zhang Yaopeng , Zhu Bo
Published: April 2021

Poly(3,4-ethylenedioxythiophene) (abbreviated as PEDOT) is widely used in nerve electrodes and biosensors. However, only a few investigations on the electrochemical stability of PEDOT derivatives in the biological environment have been reported. Here, the electrochemical performances of two PEDOT derivatives were evaluated during cell culture. The results showed phosphocholine-functionalized PEDOT (PEDOT-PC) to possess good anti-cell adhesion ability with 0.6% impedance change before and after cell culture. By comparison, hydroxyl-functionalized PEDOT (PEDOT-OH) promoted cell adhesion, in which impedance decreased by 17.6% with cell spreading due to strong adsorption of serum proteins. In sum, these findings look promising for the development of novel and facile PEDOT platforms for in vivo bioelectronics.
Selective laser melting 3D printed thermal shield metamaterial structure
Authors: Deng Tianxiang , Li Bo
Published: April 2021

Due to ingenious design and elaborate construction of artificial structures, thermal metamaterials commonly possess extraordinary properties beyond natural materials under the conventional heat transfer conditions. Based on the transformation thermodynamics theory and the effective medium theory, in this paper, a plane-structure thermal shield aiming to manipulate heat flow was artificially designed and manufactured with the selective laser melting (SLM) 3D printing technology. The well-designed thermal shield allows the heat flow to bypass the central area of the structure for transmission and can be applied for heat protection in industries. Furthermore, the thermal shield metamaterial was fabricated and experimentally tested through the thermal monitor platform. And the experimental findings were in good agreement with the thermal simulation results. Therefore, the research results and the use of SLM 3D printing technology verified the applicability and feasibility of the thermal shield in the fields of thermal engineering and thermal control.
The Analysis of Nanomaterials in Nanoparticle Protein Corona Enabled Tests for Early Detection of Cancers
Authors: Deng Qiyun , Zhu Yi , Chu Ziyue
Published: April 2021

Cancer is the major worldwide cause of thickness and death, leading to the early diagnosis of cancers being the focus of current medicine. According to the World Cancer Research Fund International and Practice Update statistics, the ten-year survival rate of lung cancer is 7%, pancreatic cancer 2.2%. The average ten-year actuarial breast cancer-specific survival rate for all women age groups is 14.1%. The results in an urgent need for early detection of the three cancers to maximize patients’ survival rates. Protein-corona based tests are currently high-profile due to their performance on early diagnosis. When placed in human plasma, the protein patterns will be altered by specific pathologies, causing different protein corona compositions from healthy individuals., Early detection of cancers can be accurately realized through that. This study aims to provide a pathway for future research on nanoparticle-protein-corona-based tests and early diagnosis of lung cancer, pancreatic ductal adenocarcinoma, and breast cancer. This study is conducted by summarizing the currently existing developments and analyzing the performances and the limitations of types of nanomaterials used in the tests. The evidence of effective detection of early-stage cancers by protein-corona enabled tests can attain future research insights.
Study on Oxidizing Chlorine Induced Corrosion Behavior of Several Stainless Steel Alloys
Authors: Miao Changhui , Jiang Longfa , Bai Lingyun , Chen Tuchun
Published: April 2021

High temperature chlorine corrosion tests were performed on several stainless steels, which were 622,316, A59,686, 2#825, and 3#825. After corrosion under 70N2-2CO2-1O2-0.2HCl oxidizing gaseous environment at 800°C for 120 h, the corrosion dynamics of alloys were obtained, which showed the ability of alloys’ high temperature chlorine corrosion resistance. The corrosion resistance sequence from high to low was A59>686>622> 3#825>2#825>316. This order is consistent with the Mo element content in the alloy. SEM/EDS analysis was used to observe the surface and cross-section morphology of the corroded samples. Alloys with high chlorine induced corrosion resistance formed Cr2O3 oxide layers on the surfaces of the samples, such as 622,686 and A59. Iron oxides formed alloys, such as 316 and 2#825, had lower corrosion resistance, because of the loose and porous oxides, which had very high vapor pressure. The formation of TiO2 could also enhance the corrosion resistance.
Preparation of a poly(L-lactic acid) braided stent with high radial force
Authors: Tian Yuan , Liu Muqing , Liu Wentao , Cheng Jie , Zhao Gutian
Published: April 2021

In this paper, a poly(L-lactic acid) (PLLA) braided stent with high radial force is prepared by optimizing the processes of monofilament forming and stent annealing. Firstly, three kinds of PLLA monofilaments with different diameters are prepared by melt extrusion, then two kinds of thicker monofilaments are further solid-state drawn to have diameters similar to that of the third thinner monofilament. The monofilament that is solid-state drawn at the larger draw ratio shows sufficient tensile mechanical properties and can be used for braiding stents, which is owing to the promotion of oriented crystallization. Secondly, PLLA braided stents are annealed at different temperatures. Stent not annealed shows much lower chronic outward force (COF) and much higher radial shrinkage rate (RSR) than those of annealed stents. Moreover, the COF is increased by 115% and the RSR is decreased by 59% as the annealing temperature is gradually increased from 80℃ to 160℃. Therefore, PLLA braided stents can be annealed at higher temperatures below their melting temperature to enhance the radial force. These results are due to the improved crystallinity induced by the thermal motion of molecular chains. This study may provide helpful suggestions for the preparation of biodegradable braided stents with high radial force.
Microstructures and mechanical properties of dispersoid-strengthened 6082 aluminum alloy plate produced by vacuumed centrifugal casting
Authors: Qian Xiaoming , Zhang Bosi , Wang Zhaodong , Li Yong , Li Jiadong
Published: April 2021

A dispersoid-strengthened 6082 alloy was prepared using vacuum centrifugal casting. The casting pipe was split into two halves along the axial direction, then every single half of the pipe was flattened and was treated as a slab and was subsequently generated to the conventional rolling to produce plate. The microstructure and the mechanical properties of the inner, middle, and outer layers of the pipe was studied. The results shows that the intermetallic in the as-cast microstructure was gradient distributed, the number density of intermetallic decreased and the average size increased from outer layer to inner layer. After heat treatment, area fraction of the α-Al(Fe, Mn)Si dispersoid zone and the number density of dispersoid increased gradually from outer layer to inner layer. After rolling, the high temperature strength of the plates decreased and the elongation decreased from the outer layer to the inner layer.
Hot deformation activation energy of a 5E83 alloy prepared with centrifugal casting
Authors: Qian Xiaoming , Zhang Yu , Wang Zhaodong , Li Yong , Li Jiadong
Published: April 2021

5E83 aluminum pipe was produced withy centrifugal casting, the hot deformation were performed on the inner, middle, and outer layers of the pipe, the hot deformation activation energy Q were calculated. The results revealed that the hot deformation flow stresses exhibited increase tendency along with the inner, middle, and outer layer, the hot deformation activation energy Q increased from 164.5MPa for the inner layer to 197.6 and 214.9MPa for the middle and the outer layer respectively. Along with the layer of inner, middle, and outer, the solid solution level increased and the grain size decreased. Correspondingly, the solid solution hardening became stronger and the grain refinement mechanism was enhanced, resulting in the increased hot deformation flow stresses and activation energy Q.
An investigation of binary surfactant in the synthesis of gold nanorods
Authors: Wei Ming-Zhang , Deng Tian-Song , Zhang Qi , Gu Yi-Jie , Cheng Zhiqun
Published: April 2021

The method by using hexadecyltrimethylammonium bromide (CTAB) and sodium oleate (NaOL) as binary surfactant mixture to synthesize high quality gold nanorods (AuNRs) has been one of the most widely used methods in this field. But the specific influence on the obtained AuNRs of these two surfactants has not been systematically studied in previous works. Here, we carry out series of experiments and characterized the results. By using the UV-VIR spectrophotometer and transmission electron microscope, we found the higher CTAB concentrations will lead to the larger aspect ratios of the obtained AuNRs. In addition, the final products under this method are more sensitive to the NaOL concentration.
Particulates Distribution in the Dynamic Pressure Sliding Bearing under the Oil Lubrication Condition
Authors: He Chen , Yu Fanzhen , Yang Kun
Published: April 2021

In the dynamic pressure sliding bearing under the oil lubrication condition, the lubrication oil between the journal and the bearing bush maintains the normal operation of the bearing, which is affected by the complete oil film, the boundary lubrication and the mixed film. With the increase of oil input and journal speed, it is not uniform towards the dynamic pressure distribution inside the sliding bearing. At the same time, cavitation is occurring, causing that particulates fall off the bearing surface, as well as the increase of the improper noises, which reduce the service life of the sliding bearing. The experimental result shows that the wear particles in the oil film are affected by the rotation speed of the shaft journal, the external load of the bearing and the size of the wear particles, so the wear particles in the bearing oil film are concentrated at the working face of the bearing bush and the minimum thickness of the oil film by centrifugal motion. Therefore, the study of the physical and chemical characteristics, which are talked on wear particles in the lubricating oil film of dynamic pressure sliding bearings, will play an important role in the fault diagnosis and condition monitoring of sliding bearings in the mechanical field.
Surface Integrity of Turned 6061 Aluminum Alloy using Liquid Nitrogen as Cooling Medium
Authors: Pan Duo , Wang Xiangyu , Niu Jintao , Qiao Yang , Guo Peiquan
Published: April 2021

Aluminum alloy is widely used in automobile, aerospace and other fields due to its excellent strength-to-weight ratio. And machined surface integrity is an important factor affecting the service performance of parts. In this paper, surface integrity of turned 6061 aluminum under liquid nitrogen cooling condition was studied. The results shows that, cryogenic cooling cutting with liquid nitrogen could effectively reduce the surface roughness, inhibit the generation of residual tensile stress and improved the surface microhardness compared with dry and emulsion cooling cutting. Cryogenic cooling processing has great advantages in cutting machining.
Effect of roller speed on heat transfer for ultra-thick steel plate during quenching
Authors: Tian Xiuhua , Fu Tianliang , Wang Zhaodong , Wang Guodong
Published: April 2021

In order to clarify the effect of roller speed on the heat exchange characteristics for ultra-thick steel plate during cooling, the roller quenching experiment was completed with the variable roller speed in the range of 3.2-12.8 mm/s. The surface heat transfer conditions were obtained by inverse heat conduction, and used to study the effect of roller speed on the surface rewetting phenomenon and heat flux. It was found that the rewetting speed and rewetting temperature increased with the increase of roller speed, and a higher surface heat flux was reached. By comparing the maximum cooling speed at different temperature measured points, increasing the roller speed had a positive effect on increasing the cooling uniformity along the horizontal direction. However, the cooling difference alone the thickness direction was enlarged. The above research results would provide method and basis for the technology optimization of roller quenching for ultra-thick steel plate.
In-situ observation of temperature effect on the tensile deformation behavior in laser melting deposited TA15 alloy
Authors: Rizwan Muhammad , Lu Junxia , Ullah Rafi , Zhang Yuefei
Published: April 2021

In this study, laser melting deposited TA15 alloy was examined by in-situ SEM tensile deformation at a range of temperatures; RT, 300℃ and 500℃. The as-fabricated microstructure consists of prior β grains boundaries and fine basketweave microstructure. Due to LMD fabricated alloys’ anisotropic behavior, the tested samples were collected from the same region and direction. The XRD and SEM results showed that the temperature up to 500℃ has no impact on the phase constituent and structure morphology, revealing a stable microstructure. The tensile deformation at room temperature (RT) revealed that slip lines were the primary deformation mechanism generated in the parallel and larger alpha grain. An increase in temperature triggered grain boundary sliding during deformation, which enhanced the elongation in the material at the cost of tensile strength reduction. The grain boundary resistance to dislocation slip was affected by the sliding phenomenon due to increased temperature. Overall, the material showed stable tensile characteristics related linearly to the temperature variation.
Fabrication of antireflective hydrophobic periodic micro-hole structures on ZnS surface by femtosecond laser direct writing
Authors: Zhou Kun , Yuan Yanping , Chen Jimin , Wang Chunlian , Xiang Shibo
Published: April 2021

ZnS has a promising wide range of applications in optical and optoelectronic areas. But the Fresnel reflection on ZnS surface reduces the transmittance of light and causes an obstacle in its applications. Thus, it is crucial to minimize the Fresnel reflection to promote the antireflection property. This paper demonstrates an effective way to fabricate antireflective periodic micro-hole structures on ZnS surface by femtosecond laser direct writing. The effects of laser power, scanning speed on the morphology of the holes are investigated. The fabricated structures exhibit an excellent antireflection property, and achieve more than 30% decrease in reflectance in the near-ultraviolet spectral wavelength range and near-infrared spectral region (200-800 nm), reducing 35% in 280 nm, especially. Besides, the prepared surface demonstrates effective performance concerning hydrophobicity with a contact angle of 107.4°, and the contact angle of unprocessed ZnS is 96.2°. These results show that the femtosecond laser can induce the antireflection and hydrophobic properties on the surface of ZnS, which has a potential application in outdoor optical and optoelectronic devices.
Thermal and Visual Comfort Analysis Using CBE Tools And Velux Simulation of Classroom in R.21 in Gedung Kuliah Bersama V University of Bengkulu
Authors: Seftyarizki D , Prihatiningrum A , Ramawangsa A
Published: April 2021

Thermal and Visual Comfort are two important subjects in building science. These two requirements also play important roles in creating good indoor environment quality. So does with R.21 in Gedung Bersama V Universitas Bengkulu, which used as a classroom. In a previous study, daylight visual comfort and mean radiant temperature for thermal comfort are already identified. However, the visual comfort of the previous study only defined the annual daylight. Meanwhile, thermal comfort was only defined by the mean radiant temperature obtained. In this recent study, different methods will be conducted to get more reliable results as well as upgrading the research quality. Thermal and Visual Comfort on August at 9 am, 11 am, and 1 pm and 3 pm will be identified. Thermal comfort quality will be measured with PMV standard from CBE calculation. Meanwhile, visual comfort quality will be interpreted using Velux daylight analysis and visualization. Weather data input is collected from Meteoblue. The result of the study showed that thermal comfort of the classroom is higher than standard, with PMV 1. Whereas visual comfort obtained already met the standard. Nevertheless, more output data obtained can improve the research map.
Development of the Life Cycle Analysis (LCA) Method in calculating Embodied Energy Materials on Residential Buildings
Authors: Primasetra Anjar , Larasati Dewi
Published: April 2021

One of the benefits of BIM towards a sustainable design is it can make a design system that will calculate the building energy in aim to give alternatives on energy-efficient design. BIM can be utilized to integrate the calculation of Embodied Energy (EE) Building Materials with the Life Cycle Analysis (LCA) method. EE calculation could be easier for architects; hence, the architects can understand the impact of carbon emissions caused by construction activities during the design process. This paper aims to provide an overview of the use of BIM in calculating the EE value of the designed building material on the apartment project. Since the development and construction of flats and apartments, especially in Indonesia, are growing fast, this will give highly environmental impact if it is not properly controlled. The results showed that the BIM implementation in calculating the EE value could be done. Collaboration with other platforms can also be done to make the final calculation, and it will be displayed in attractive data visualizations. The percentage comparison of the embodied energy value in all of the building component materials can also be seen in the results of the analysis. In this case, the highest embodied energy percentage is the structural component, which is 53.16%. It is hoped that the development of this calculation method will contribute to the development of LCA so that EE can be easy to be calculated and have a good impact on the construction industry in the future, especially in Indonesia.
Energy Optimization on Campus Building Using Sefaira
Authors: Wibawa B. A. , Saraswati R. S. , Chandra A. B. , Saputro B. E.
Published: April 2021

Energy efficiency in buildings is an important target to be met to reduce the greenhouse effect’s impact. Simulation methods and techniques are essential for conducting energy analysis and producing targets more accurately and quickly. This research calculates and simulates the Energi Use Intensity (EUI) and Spatial Daylight Autonomy (sDA) in Semarang’s campus building. Simulations are carried out using Sefaira software as a plug-in to the Sketchup software. The first energy use simulation (EUI) analysis as a baseline was carried out using the ASHRAE 90.1-2019 material standard resulting in a 144 kWh/m2/yr. The second simulation on the facade’s conditions and existing materials becomes my baseline result increasing to EUI 157 kWh/m2/year. The first engineering improvement was to replace the existing TL/PL lighting with an LPD value of 15.0 watts/m2 and replaced it with LED with an efficiency of 5.0 watts/m2, which can reduce energy use 131 kWh/m2/year. Furthermore, the 2nd scenario reduced window openings on the west and east sides, which had an immense contribution to heat intake, resulting in an additional efficiency of 118 kWh/m2/year. In the third scenario, replacing all glass types with several alternatives results in a reduced value EUI 99-109 kWh/m2/year. Still, All changes to this type of glass resulted in a decrease in natural lighting quality so that the sDA value fell below 50%, with the status changing from my baseline “well lit” to “under lit.” 4th scenario, the analysis was carried out by replacing glass without reducing the wall openings (WWR reduction). The results show that all changes to glass types/colors resulted in a decrease in natural lighting quality, except for replacing the Panasap Euro Gray glass types that still provide 61% sDA and 11% ASE values, thus providing a “well lit” quality. Of the four scenarios, only scenarios 1 to 3 provide a value of natural lighting quality that remains “well lit.” Scenario 4 causes the rate to drop to “under-lit.” Furthermore, from scenarios 1, 2, and 3, the lowest EUI value is in scenario 2 with a value of 118 kWh/m2/yr, so the 2nd scenario is the best in this optimization process. The first section in your paper
An Analysis on a Vernacular Design in Wetland Environment Using Reconstruction Simulation Method
Authors: Muchamad Bani Noor , Mentayani Ira , Saud Mohammad Ibnu
Published: April 2021

This research aimed to reveal the vernacular designs formed by wetland environment and explain how the designs have been able to survive in a condition that the soil or land has low carrying capacity for structures. This research used a 3D-simulation method to reconstructed the situation, and for this purpose, Banjarese house that is Bubungan Tinggi house in South Borneo Province was chosen as the object of the study. By the method, the house was reconstructed digitally to prove that the information about how it had been able to stand firmly on a wetland. The 3D-simulation results were then analyzed so that the information of the construction pattern and the design type were generated. The result of typology analysis showed five types of designs which were then identified as the design concept of vernacular constructions of wetland environment. These five types of construction designs were (1) floating foundation, (2) continuous pillar, (3) pillar-binding beam, (4) beam-binding beam, and (5) pillar-locking beam. These five construction designs altogether formed a firm and stable structure on a wetland environment that known as indigeneous local of wetland vernacular.
The effect of insufficient artificial lighting on workers’ moods and physiology: preliminary research
Authors: Aryani S M , Kusumawanto A , Suryabrata J A , Airin C M
Published: April 2021

In line with the sustainability issue, the current research related to lighting has been focused on maintaining the health and well-being of the workers, not only for energy saving considerations. This preliminary research observed the effect of artificial light below the recommended illuminance levels for the workplace on the workers’ moods and their physiological condition. The researchers employed a quasi-experimental approach by observing the participants’ sleepiness state, mood, and physiological condition related to their cortisol levels in the first two and last two hours of their work shift. The research subjects were five male printing workers who worked in the basement of an office building in Sleman Regency, Special Region of Yogyakarta, Indonesia. As the room was below the ground floor, to accommodate their work activities, the employees relied on artificial lighting, complemented by a small amount of natural lighting entering the basement. The lighting was measured on the illuminance level of 250s lx and the CCT of 5000s K. The research revealed that there is no complaint or problem regarding the illuminance level, no effect on the individuals’ state of sleepiness, or on their moods. However, the cortisol level tended to decrease faster than the normal circadian curve. Therefore, it is reasonable to conclude that even though ‘insufficient’ lighting levels can accommodate activities, the physiological condition of the subjects shows different results which indicate a negative increment.
Optimization of Natural and Artificial Lighting System in UPGRIS Lecturer’s Workspace using Dialux Evo
Authors: Saraswati Ratri Septina , Wibawa Baju Arie , Saputra Bambang Eko
Published: April 2021

Semarang city in Central Java has natural lighting from sunlight, throughout the year and can be optimized when integrated with artificial lighting. It will be reduce electrical consumption. Research in lecturer’s workspace in Gedung Pusat UPGRIS performs a simulation analysis of natural and artificial lighting and their integration using the Dialux EVO version 9.0. The simulation results of the existing condition of natural lighting is 164 Lux (09.00 AM) and 225 Lux (01.00 PM), while the existing simulation results provide 201 Lux with a power consumption of 1.69 Watt/m2. The results of the integration natural and artificial lighting produce 265 Lux (09.00 AM) and 256 Lux (01.00 PM) with the same electrical consumption of 0.84 Watt / m2. This value shows that the existing simulations of natural, artificial and integrated of them are still less than the SNI 16-7062-2004 standard is 350 Lux. The first retrofitting by changing the type and number of lamps resulted in 393 Lux higher from SNI standard 350 Lux. The simulation produced 556 Lux at 09:00AM and 648 Lux at 01:00PM, veryhigher than SNI standart 350 Lux. Through this retrofitting approach, artificial lighting at night shows minimum standard because no light. The second retrofitting effort is to turn off the lights automatically Lux sensor in the workspace area near the windows the natural lighting is strong enough, the results show that the illumination strength of 402 Lux at 09:00AM and 494 Lux at 01:00PM with low electrical consumption during the day becomes 2.92 Watt/m2.
Evaluation of lighting design on Working Space (Case Study: Indo Global Mandiri Faculty office)
Authors: Febrina S E , Ali R A N
Published: April 2021

These days when a well-lit working space yet with sustainable building are significant issues in building performance. A building that designed to be an office should have enough illumination and low energy consumption. The newest constructed and finished building designated for Faculty members of Indo Global Mandiri University (UIGM) is expected to provide the optimum well-lit working space that can give a good support for accomplishing work and task given. Therefore, an evaluation on illumination level obtained from lighting design on working space for this building should been done. Evaluation is carryout by simulation tools to find out the illumination level contour, and daylight factor. Several factors will be accounted for the evaluation such as opening, arrangement and type of luminaries, and material. The method used in this evaluation is simulation software that shows the value of illumination on working level plane and validate with field measurement. The result of this evaluation will show whether lighting design on working space in the case study meets the standard illumination for working space. Optimized daylight for minimum energy consumption in artificial lighting could be the proposed recommendation.
Implementation of the Greenship Rating Tools in The Centre of Excellent (CoE) building at Universitas Pendidikan Indonesia
Authors: Busono T , Rahmanisa H O , Surahman U , Mulyadi Y , Setiawan W
Published: April 2021

Environmental problems, especially global warming, have become the main topics discussed recently, and one of the causes is coming from the construction sectors. Therefore, to reduce environmental damage and global warming caused by the construction sectors, design and planning of buildings refer to the concept of green buildings. Universitas Pendidikan Indonesia (UPI), especially the Faculty of Technology and Vocational Education (FPTK), intended to implement the Green Buildings concept in the design and planning of the Center of Excellent (CoE) Technical And Vocational Education And Training (TVET) Building. For this reason, an evaluation of the implementation of the green building concept was carried out by using the criteria assessment based on the Greenship Assessment tool for New Buildings version 1.2 belongs to the Green Building Council Indonesia (GBCI). This research aims to obtain an assessment index and evaluate the green building concept in that building design. It was conducted at the Design Recognition (DR) stage, which is the assessment stage carried out when the project is in design and planning finalization. The data used is in the form of secondary data from the planner, including a plan drawing, BoQ (Bill of Quantity), and DED (Detail Engineering Design). The results generate ratings of greenship level at a percentage of 62.34%, with the predicated Gold. The category which generates the most point is the energy efficiency and Appropriate category with the improvement in building material used. Recommendations are divided into design recommendations (architectural) and management recommendations (non-architectural).
Books and Discussion Hybrid Space for Creative City
Authors: Awaliyah Dian Nafiatul
Published: April 2021

When pandemic covid-19 happen, many reading community basecamp are closed. It is because of the danger for the visitors to come. The small reading house can’t provide enough space for visitors to get physical distancing. So it is important to think about future city planning that solve this problem. We know that creative place is important to raise creative vibe for encouraging the growth of creative citizen. The online platforms become alternative space that also supports this purpose. So we may need the hybrid space which combine between physical and digital space. With qualitative method we can find out some ‘ideal spaces’ that can be learnt and being inspiration for that purpose. Ubud Writers Readers Festival, Asian Literary Festival, International Literary Festival and Patjar Merah Literary Festival can be the study cases. The creative festivals have components that we need to replicate in the ideal space for discussion and reading public space. Europe cities have corners where people can charity their books while another citizen uses the books by reading them on the spot or bring them to home. Exchanging books and ideas not only become good culture but also create citizens great bounding for stronger city.
New added values to the existing Chinese heritage shop-houses’ courtyards towards occupant environment wellness: a case study at Kota Bharu, Kelantan, Malaysia
Authors: Noordin M A M J , Nasir N C M , Nasir R M , Mustapa D
Published: April 2021

A courtyard is a main architectural component commonly found in the Chinese traditional shop houses, which was introduced by the Chinese traders. Although many studies have been done previously regarding the courtyard design, not many types of research have been done on the community buildings on the east coast of Peninsular Malaysia, especially in Kota Bharu, Kelantan. Moreover, not much information to be found towards suitable methods on the courtyards’ elements modification and its impacts. Hence the purpose of this study was to examine and discuss new added values towards these heritage shop houses courtyards components alteration within the city of Kota Bharu, Kelantan, Malaysia, without changing its purpose and benefits. The research employed a qualitative method through visual observation and in-depth interviews within its building occupants as well as experts to seek their perceptions. The early findings demonstrated the courtyards had their own uniqueness in cultural aesthetics and functions. By adding certain new values such as glass roof windows, planting, water elements, and modern materials, it can provide better internal environment satisfaction to its building and occupants. However, these added values must be well planned and controlled so that they do not harm the heritage values.
Evaluation for User’s Safety Through Psychological Perception and Walkable Path Physical Design
Authors: Apritasari Y D
Published: April 2021

Safety is one of the four basic needs of pedestrians. It must be met before other pedestrian paths are met, namely: function, comfort, and aesthetics. The DKI Jakarta government has improved the quality of the walkable path infrastructure in the Thamrin Sudirman area. Which the areas are trade and service centers and primary activity centers, as well as a strategic area (Integrated Commerce Center and Upper Hamlet area are exchanges of mass public transport ( TOD) (Spatial Planning for DKI Jakarta Province in 2010-2030). It is to improve pedestrian convenience and safety. This study aims to explore the safety problems of the pedestrian in the Thamrin Sudirman area. The research methodology used is qualitative by observing the perception of psychological parameters and physical design parameters for pedestrian safety. The results will show a physical parameter design: an open design and a transparent façade that gives a high perception of safety for pedestrians. Then it can be a role model for the design of other walkable paths design.
Acculturation of Colonial and Traditional Sundanese Architecture on the Facades of Educational Buildings as Formers of Identity and Visual Character in UPI Purwakarta Campus
Authors: Dwidayati Kunthi Herma , Barliana M.S. , Diah Cahyani P , Susanti Indah , Ramadhan Try
Published: April 2021

The development of the UPI Purwakarta campus cannot be separated from the history of the campus which is marked by the existence of heritage buildings with colonial architecture. Amid building developments in the current millennial era, the UPI Purwakarta campus as one of the leading educational buildings in Purwakarta does not yet have a distinctive image or identity in each of its buildings, even most of them are still like simple buildings. Therefore, this paper will examine campus architecture which can represent contextual campus buildings and identity through facades. The research method used is descriptive qualitative with a historical approach. The results of this study indicate that the campus building design adopts the acculturation of Sundanese traditional architecture that appears on the roof, namely the “jolopong” roof, combined with the colonial architecture that appears on vertical, horizontal, and curved lines. In addition, the colonial facade is formed from a protruding line of columns and beams. The results of the study in this paper expected to be used as a guide in the construction of further campus buildings.
Assesment of Pedestrian Walkability in the Urban Village with Urban Nework Analysis
Authors: Tiarasari Rianti , Kartidjo Woerjantari
Published: April 2021

The quality of the urban environment is one of the important aspects to be researched in a developing country. The city of Bandung is growing and expanding beyond capacities without a city plan. This has led to the emergence of many urban village. The growth of urban village with lower middle economic level causes these settlements to have low environmental quality. Tamansari is one part of the urban environment that experiences this phenomenon, which is triggered by the large number of residential employees and students.The purpose of this study was to determine the environmental quality of the urban village (Kampong Tamansari) based on walkability. The method used in this research is a quantitative approach using Urban Network Analysis, a toolbox from ArcGIS that can quantitatively measure how the design of an environment affects access to spatial and amenitic spaces and contributes to the flow of pedestrian movements in urban area. From here, five types of network centrality measures will be formulated on a spatial network including Reach, Gravity Index, Betweenness, Closeness and Straightness. The results show that the Tamansari area in the south of the Pasopati Flyover is more walkable than in the northern part. The northern part is more difficult to access due to the lack of openness of the area’s road network to the main roads.
Impact of Urban Block Typology on Microclimate Performance in a Hot-Humid High-Density City
Authors: Dwiputra Ivan Danny , Mt Dr. Ir. Woerjantari Kartidjo , Winarso Haryo
Published: April 2021

Because of their structure, urban areas induce very complex climate phenomena while notably impacting pedestrian safety and comfort in the urban microclimate. This paper presents the results of an investigation into the influence of urban block typology and building intensity on environmental performance in the context of the urban microclimate of a hot-humid high-density city. Qualitative and quantitative characterization of the building geometries used in this study was conducted to compare an existing block typology scenario with five new block typology scenarios in an area of 350 x 350 x 150 (L x W x H) meters. The scenarios investigated were composed of different settings for floor area ratio (FAR) and building coverage ratio (BCR) and different configurations of building elements (tower, podium, and courtyard). They were simulated and analyzed using the ENVI-met software. The simulation results indicate that the five new scenarios all improved the environmental thermal parameters and that the FAR has a greater influence than the BCR. FAR has the strongest correlation with air temperature, followed by solar radiation and relative humidity. The influence of BCR on humidity and wind speed is not as significant as that of FAR. A tower strongly influences wind speed in proportion to the height of the building. Open courtyards correlate with higher temperature and lower humidity than closed courtyards. The combination of a closed courtyard with a hybrid block consistently outperformed the other configurations in thermal performance. Within this framework, the proposed scenarios can provide recommendations for city design regulations and input for urban design methods to further improve microclimate performance.
Strategy to Reduce the Covid-19 Transmission through Adaptation of Greenship Interior Space (IS) Criteria
Authors: Wardhani Dyah Kusuma , Susan Susan
Published: April 2021

Greenship Interior Space (IS) is a set of criteria established by the Green Building Council Indonesia (GBCI) as a rating tool for assessing the interior space of a building. It is mainly used as a guideline that needs to be applied to buildings in order to achieve more sustainable design through energy and resource savings. Hence, it is expected to reduce the building operational costs, improve the users’ health and comfort, as well as to leave the minimum carbon footprint. Greenship IS rating tools consist of several categories, i.e., Appropriate Site Development (ESD), Energy Efficiency and Conservation (EEC), Water Conservation (WAC), Material and Resources Cycle, Building and Environment Management (BEM), and Indoor Health and Comfort (IHC). As the COVID-19 virus pandemic continues to spread, these categories need to be reviewed. Therefore, green building is not merely for sustainability but also expected could reduce the transmission of the Coronavirus that causes the COVID-19. This disease is transmitted through direct or indirect contact with the subject, droplets, and aerosols. This research employed a literature study of Greenship IS adaptation regarding the pandemic situation and followed by the critical analysis that focused on the proposed strategies for the criteria by investigating the cause, prevention, transmission, and impact to the interior space. The adaptation of Greenship IS shows the importance of human health must be achieved apart from the sustainability aspect. From the literature review, it can be concluded that the adaptation of Greenship IS is focused on creating good indoor air quality, appropriate material selection, access to nature for the occupants, maintaining health protocol, and regular disinfection in managing the building to reduce the COVID-19 transmission.
Bangladesh Management Staffs’ view on indoor condition, Health and Safety of Factory
Authors: khan Md Abdullah Al Sayem , Ahmad Mohd. Hamdan Bin
Published: April 2021

Bangladesh is a developing country. In Bangladesh, there are lots of factories for different readymade garments products. Products are used in Bangladesh and also export to many different countries. A huge number of populations are working in these industries as workers. In Bangladesh, for nearly a decade the garment industry contributing to the country’s economic growth reached an impressive 6 percent growth rate. Bangladesh is now a day one of the world’s leading clothing exporters, and the garment industry employs 3.6 million workers out of a total population of over 150 million. Most of the nation’s 4,500 factories are concentrated around the capital city named Dhaka and attract thousands of rural residents in search of jobs and a better life for their families. These factories are not well designed in terms of workers’ health and safety. A field study was held about the health and safety of workers in the factory in Bangladesh. For the study, a questionnaire survey was held among the management staff of factories. The management staff responded and get information about factories of the current condition. This Study will help to find out the current indoor condition of the factory building in terms of health and safety of workers and help to introduce a standard towards factory owners which can introduce in their factory to develop the indoor condition. Keywords: Bangladesh, Factory, Health and Safety, In House, Safety Measure
Planning Of Post-Disaster Residential Restoration Area In Tanah Hitam Village, Paloh District (Disaster Mitigation Of West Kalimantan Coastal
Authors: Triwani Qalbun , Hasriyanti Nunik , Nurhidayati Elly
Published: April 2021

Post-Disaster Settlement Recovery Area Planning is a study that aims to find out the appropriate concept for the Tanah Hitam Village area in an effort to become a disaster response village. Based on information about the coastal area of West Kalimantan, including the area that will be submerged by sea water in the next 30 years. One thing that can be done is by preserving mangroves as a green area in coastal areas. Several targets were carried out in the form of identification of areas related to the physical and non-physical conditions of Tanah Hitam Village and the area’s macro scale. In addition, an analysis of the physical conditions of the area adjusts to existing regulations and policies. The final goal to be achieved is to be able to make a concept that is appropriate to the physical conditions of the area and the space requirements of the area. The regulations and the number of literature studies are references in the formulation of this restoration concept. Reference to Ministerial Regulation on Building and Environmental Planning is the main discussion in determining plans carried out in the area.