bluuebunny/crossref_metadata_2025 huggingface dataset:
Exploring charge generation and separation in tandem organic light-emitting diodes based on magneto-electroluminescence
Authors: Li Wanjiao , Bao Xi , Wang Cheng , Yao Yu , Song Jiayi , Peng Keao , Xu Shuang , Chen Lijia , Guan Yunxia , Niu Lianbin
Published: December 2023

5,6,11,12-tetraphenylnaphthacene (rubrene) exhibits resonant energy properties (E
S1,rub ≈ 2E
T1,rub), resulting in rubrene-based organic light-emitting diode (OLED) devices that undergo the singlet fission (STT) process at room temperature. This unique process gives rise to a distinct magneto-electroluminescence (MEL) profile, differing significantly from the typical intersystem crossing (ISC) process. Therefore, in this paper, we investigate charge generation and separation in the interconnector, and the mechanism of charge transport in tandem OLEDs at room temperature using MEL tools. We fabricate tandem OLEDs comprising green (Alq3) and yellow (Alq3:rubrene) electroluminescence (EL) units using different interconnectors. The results demonstrate that all devices exhibited significant rubrene emission. However, the MEL did not exhibit an STT process with an increasing magnetic field, but rather a triplet–triplet annihilation (TTA) process. This occurrence is attributed to direct carrier trapping within doped EL units, which hinders the transport of rubrene trapped charges, consequently prolonging the lifetime of triplet excitons (T1,rub). Thus, the increased T1,rub concentration causes TTA to occur at room temperature, causing the rapid decrease of MEL in all devices under high magnetic fields. In devices where only the TTA process occurs, the TTA increases with the increasing current. Consequently, the high magnetic field of devices A–C is only related to TTA. Notably, there exists a high magnetic field TTA of device D in the Alq3/1,4,5,8,9,11-Hexaazatriphenylene-hexacarbonitrile interconnector regardless of the current. This occurs because both EL units in the device emit simultaneously, resulting in the triplet-charge annihilation process of Alq3 in the high magnetic field of the MEL. Moreover, the rapid increase in MEL at low magnetic field across all devices is attributed to the ISC between Alq3 polaron pairs. This entire process involves Förster and Dexter energy transfer. This article not only provides novel insights into charge generation and separation in the interconnector but also enhances our understanding of the microscopic mechanisms in tandem OLED devices.
Solar-blind ultraviolet photodetector based on Nb2C/β-Ga2O3 heterojunction
Authors: Zhang Yongfeng , Liu Shuainan , Xu Ruiliang , Ruan Shengping , Liu Caixia , Ma Yan , Li Xin , Chen Yu , Zhou Jingran
Published: December 2023

β-Ga2O3 has been widely investigated for its stability and thermochemical properties. However, the preparation of β-Ga2O3 thin films requires complex growth techniques and high growth temperatures, and this has hindered the application of β-Ga2O3 thin films. In this study, β-Ga2O3 thin films with good crystalline quality were prepared using a green method, and an ultraviolet (UV) detector based on β-Ga2O3 with a photocurrent of 2.54 × 10–6 A and a dark current of 1.19 × 10–8 A has been developed. Two-dimensional materials have become premium materials for applications in optoelectronic devices due to their high conductivity. Here, we use the suitable energy band structure between Nb2C and Ga2O3 to create a high carrier migration barrier, which reduces the dark current of the device by an order of magnitude. In addition, the device exhibits solar-blind detection, high responsiveness (28 A W−1) and good stability. Thus, the Nb2C/β-Ga2O3 heterojunction is expected to be one of the promising devices in the field of UV photoelectric detection.
A self-powered spiral droplet triboelectric sensor for real-time monitoring of patient infusion in nursing wards
Authors: Qian Lei , Wang Yue , Qian Weiming , Wang Yong , Qian Jingui
Published: December 2023

Monitoring of intravenous infusion together with an alarm system is significant for safety and automation operation in the process of clinical drug delivery for major medical institutions. However, there is still a lack of multifunctional sensors to monitor the whole infusion process, such as flow rate, drip rate, and temperature. Herein, we propose a self-powered droplet triboelectric sensor (SDTS) based on the principle of liquid–solid triboelectrification to monitor both intravenous infusion flow and infusion type. Such SDTS devices use two materials with different electrically charged properties to directly generate an electrical signal without any additional power supply, which is conducive to the formation of a large-scale detection system and for enhancing the convenience of medical treatment. The SDTS placed in a disposable infusion set has high potential application in clinical practice and is low cost and easy to prepare. Specifically, we demonstrate the feasibility of the detection of the current infusion flow rate and identification of the infusion medicine type according to the triboelectric signals, providing a new solution for real-time monitoring of patient infusion in nursing wards.
Nano- and micro-crystalline diamond film structuring with electron beam lithography mask
Authors: Quarshie Mariam M , Malykhin Sergei , Obraztsov Alexander , Kuzhir Polina
Published: December 2023

Direct current plasma enhanced chemical vapor deposition (CVD) was employed to create polycrystalline diamond films from CH4/H2 gaseous mixture at 98 mbar pressure and various substrate temperatures between 720 °C and 960 °C. The Si chips with patterns of periodic masked and open seeded zones were used as substrates. The mask free seeded areas evolved into polycrystalline diamond films after CVD process. The diamond crystallites of the films featured single crystal ordering individually with distinct cubic (100) or octahedral (111) facets on the film surfaces. Notably, specific growth conditions were determined for obtaining diamond films composed of the crystallites of nanometre and micrometre scale. These conditions are differing from those observed for non-pattern-prepared Si substrates. The nano-crystalline diamonds emerged within the 4.5–5 A current range, with growth conditions involving 3% CH4/H2 mixture at 98 mbar. The micro-crystalline diamonds (MCDs) predominantly characterized by well-developed rectangular (100) crystal faces on the film surface were successfully grown with current settings of 5.5–6 A, under 3% CH4/H2 mixture at 98 mbar. Furthermore, MCDs characterized by entirely crystalline (111) diamond faces forming CVD film surface were attained within a growth parameter range of 4.5–5.8 A, employing 3% CH4/H2 mixture for certain samples, or alternatively, utilizing 5 A with a 1.5% CH4/H2 mixture for others. Upon thorough evaluation, it was established that SiO2, TiO2, and Cr masks are well-suited materials for the planar patterning of both nano- and micro-crystalline diamond films, and the bottom-up approach can pave the way for the production of diamond planar structures through CVD, facilitated by electron beam lithography (EBL).
Design and investigation on polarization insensitive dual band graphene based tunable absorber for THz applications
Authors: Verma Asha , Meena Om Prakash
Published: December 2023

In this communication, a metal-free graphene-based Absorber is designed and examined in the THz regime. The graphene layer is coated over the SiO2 substrate, while the silver layer is used on the other side of the substrate. The designed absorber works in two frequency bands i.e. 2.2–2.91 THz (11–14 μm) and 4.85–5.83 THz (51–62 μm), having more than 90% absorption. Peak absorption is obtained 2.55 THz and 5.05 THz with 97.78% and 99.71% absorption. With the help of circular sectoring, the designed absorber shows wide polarization and wide incident angle (up to 60°) insensitivity for both TE and TM modes. Change in chemical potential of graphene provides the tunable characteristics in the designed absorber. All these outcomes confirm that the designed metal-free graphene-based metamaterial absorber works efficiently in THz regime and can be used in different applications such as, sensing and imaging.
The energy storage performance of Sm3+ and Hf4+ co-doped AgNbO3 lead-free antiferroelectric ceramic
Authors: Zhang N , Zhang Z F , Wang J Y , Jiang J R , Wang Y H , Jia P P , Zhu M M , Zhao H X , Guo Y Y , Song G L
Published: December 2023

Antiferroelectrics with excellent energy storage density have attracted considerable attention due to their potential applications in electric vehicles, pulsed power weapons, etc. With the trend of environmental protection, the lead-free antiferroelectric AgNbO3 is a promising candidate for energy storage applications. However, the limited recoverable energy density (W

rec
) of AgNbO3 severely restricts its application in high-power systems. To enhance the W

rec
of AgNbO3, the A/B-site Sm3+/Hf4+ co-doping approach was adopted. It positively influenced the energy density and efficiency in AgNbO3 by simultaneously increasing the maximum polarization and breakdown strength. The optimized W

rec
of 1.98 J cm−3 and high energy storage efficiency (η) of 64% were obtained in the MnO2-doped Ag0.97Sm0.01Nb0.99Hf0.01O2.995 ceramic at an electric field of 202 kV cm−1. This work indicates that the A- and B-site substitution with donor and acceptor dopants and using MnO2 as a sintering aid is an effective strategy for developing high-performance ceramic capacitors for energy storage applications.
Robustness of partially coherent vortex beams to the impact of dynamic Kolmogorov kind of turbulence
Authors: S R Lekshmi , Narayanamurthy C S
Published: December 2023

The wave propagation characteristics of Gaussian-Schell model vortex beams passing through a dynamic Kolmogorov type of turbulence are analyzed at the laboratory level. The effect of a rotating pseudo-random phase plate, which simulates Kolmogorov-type atmospheric turbulence, on the Gaussian-Schell model beams carrying twist phase is characterized by calculating the scintillation index and intensity line profiles. Our analysis proves the resilience of Gaussian-Schell model vortex beams to the impact of dynamic turbulence. Simulation studies are further used to validate the experimental results. Because of the resemblance between our investigation conditions and real-world atmospheric turbulence, these findings have potential applications in free-space communication systems.
Remote-controllable refractive-index-sensitive plasmonic waveguide and rake-like switch: designs and FDTD simulations
Authors: Fan Yichen , Yang Peng , Chen Yu , Yin Kai , Liu Min , Huang Han , Ouyang Fangping
Published: December 2023

A refractive-index-sensitive plasmonic waveguide, whose transmission characteristics could be controlled remotely by a rake-like switch design, is theoretically studied in the reported work. The distance from the remote control unit to the bus waveguide is more than 0.25 μm, and it still possesses great efficiency even when the distance is increased to 0.535 μm. The switch basically contains two main sections. The first is on the bottom and next to the bus waveguide which functions as a plasmonic resonator that can induce localized surface plasmon resonance (LSPR) and restrict wave propagation at corresponding resonant frequency. The second is on the top and far away from the bus waveguide which functions as a remote controller that can modulate LSPR frequency in the first section. The refractive-index-dependent transmission spectra of this filter were simulated using finite-difference time-domain method. The results have shown that even at a distance as far as 0.5 μm, the ON/OFF switching of the wave propagation in a bus waveguide can still be modulated by adjusting the refractive index of a remote rectangular controller. With only 0.08 difference in refractive index, it could be obtained an on–off switching ratio of 18.7, 20.4 and 25.7 respectively for different waveguides at visible and near infrared wavelength, which shows great potential applications in refractive index sensors and remote-controllable band-stop filters.
The use of Clitoria ternatea as sustainable detection tool for Ni (II) and Cu (II) ions in simple paper-based analytical device
Authors: Indrianingsih A W , Aryal P , Henry C S
Published: December 2023

Clitoria ternatea plants was growth widely in Indonesia. It was used as natural coloring in food or supplements. In this study, the C. ternatea flower was extracted using ethanol 70% and used for detection of metal ions (Ni, Cu) in aqueous medium. The ability of anthocyanins in C. ternatea extract to react with metal ions was studied using UV-Visible spectroscopy. It was found that the complex of metal ions with C. ternatea flower extract making the hypsocromic effect to the spectra of C. ternatea pure extract. Furthermore, simple paper based analytical device attached with C. ternatea extract was used as test spot to detect the metal ions. It reveals that the color of C. ternatea extract was changed and the calibration curve was obtained. The limit of detection (LOD) in the optimum pH for Ni (II) and Cu (II) was 8.89 ppm, and 4.49 ppm, respectively. Thus, this study showed that C. ternatea flower extract provides sustainable color detection for metal ions with economic and environmental benefits.
Phytochemical screening and antioxidant analysis on algae of the Phaeophyta Division (Sargassum sp. and Padina sp.)
Authors: Henri  , Assyifa I , Alita  , Rahmasari
Published: December 2023

Algae Division of Phaeophyta (brown algae) is a group of macroalgae that have important benefits for life because they contain bioactive compounds such as antioxidants. This study aims to identify bioactive compounds and analyze the antioxidant activity of algae of the Phaeophyta Division in the genusSargassumsp. andPadinasp. The methodology in this study included extract preparation by maceration method using 70% ethanol, phytochemical tests using several reagents, phenolic total was carried out quantitatively, and antioxidant activity testing using the 1,1-Diphenyl-2-Pycrihydracyl (DPPH) method. The results showed thatSargassumsp. contains tannins, saponins, alkaloids, steroids, and triterpenoids. Meanwhile,Padinasp. contains only tannins. The yield ofSargassumsp. extract was 0.086% while that ofPadinasp. extract was 0.065%. The total phenolic content of theSargassumsp. extract was 419.133% while that of thePadinasp. extract was 248.467%. Antioxidant activity ofSargassumsp. extracts with IC50 10.93 mg/L andPadinasp. of 10 mg/L. The higher the total phenolic content, the higher the antioxidant activity, in which phenolic compounds are known to play a role in neutralizing free radicals, inhibiting oxidation in body cells, and can prevent cell damage.
Sustainable harvest: exploring sugar palm trees as a green economy catalyst in Bukit Kaba Natural Park, Bengkulu, Indonesia
Authors: Hayadin  , Yuniarto P R
Published: December 2023

Conservation areas are synonymous with protected areas and is prohibited for social and industrial activities that damage the environment. How ever, this research found in which at Bukit Kaba, the use of conservation areas could support the preservation of the natural environment. This article explained that by finding niche commodities, conservation areas can generate many economic benefits for the surrounding community and preserve the natural environment at the same time. This research was environmental qualitative research conducted at conservation area of the Bukit Kaba, Bengkulu, Indonesia. Data were obtained through observation, interviews, document studies, and focus group discussion with the Bukit Kaba conservation area stakeholders. The research team stayed for 20 days in Rejang Lebong district and visited community groups while conducting observations and interviews. The research concluded that the agreement between farmer groups and the Balai Konservasi Sumber Daya Alam (Nature Conservation Agency) to maintain and cultivate sugar palm trees at Bukit Kaba conservation area is an excellent green economic practice. The agreement stipulated the palm trees growing in the Bukit Kaba conservation area as a niche commodity because it can provide multiple benefits. On the one hand, palm trees provide economic benefits to residents around the conservation area. On the other hand, palm trees help maintain land and soil resilience in the Bukit Kaba area.
Scenario mitigation of threats and disruptions to development plan of Nuclear Power Plan (NPP) in Indonesia
Authors: Lusiana L , Sasongko NA , Supriyadi I
Published: December 2023

Plans for the development of nuclear power plants in Indonesia have existed since the Soekarno regime in 1945, but have never reached the policy implementation stage until the current presidency of Joko Widodo. This is related to obstacles that can be in the form of Threats, Disruptions, Obstacles and Challenges (AGHT), so that it always fails in the implementation process, both on a global, national and regional scale due to issues in the social, political, technological, and other realms. The purpose of this study is to analyze the scenario of Threats and Disruptions mitigation scenarios for the development of nuclear power plants in Indonesia. The results of the study indicate that the mitigation of the threat of nuclear power plant development plans in Indonesia is through First Track Diplomacy and Second Track Diplomacy, guided by Law No. 10 of 1997 in decision making, and integrated community involvement in supporting government programs. Mitigation of disruptions to the nuclear power plant development plan in Indonesia through a policy of targeting the energy mix by optimizing the use of NRE other than nuclear, while developing a nuclear power plant development plan, implementing a Carbon Tax, socialization through K/L cooperation regarding the use of nuclear energy for nuclear power plants, various fields and second track diplomacy.
Revealing consumer attitudes towards green products: the role of environmental awareness, perceived value, and media influence on zero waste products purchase intentions
Authors: Huda M , Hartati N , Gunawan A I , Luthfi F M
Published: December 2023

Climate change and extreme weather, natural disasters, and many other events caused by global warming are real detrimental effects of the current natural damage. This obliges business actors to use natural resources responsibly for business purposes and continuously change and develop environmentally friendly products. Zero waste is a philosophy of life that encourages people to consume more responsibly and maximize the life cycle of resources so that products can be reused. This study aimed to determine the effect of consumer attitudes towards green products, which impact the intention to buy zero-waste products based on the influencing factors. In the data collection process, researchers used a quantitative research method. Data collection was obtained from 213 respondents who had consumed zero waste products. The data analysis process was carried out using the SEM-PLS method. The study results show that environmental awareness and perceived values increase willingness to pay and purchase intentions of zero waste products.
Exploring the influence of agrochemicals on beneficial microbial communities in soil
Authors: Hong L T A , Trung P M , Duong D V , Tran T
Published: December 2023

Ensuring the safe value of agricultural products is crucial for the sustainable development of agriculture, which requires the rational use of both chemical and biological products. However, the use of current agrochemicals can adversely affect the beneficial microorganisms in soil and reduce their efficacy. This study aimed to evaluate the impact of 16 commonly used agrochemicals on five microbial species, including Bacillus sp., Pseudomonas sp., Saccharomyces sp., Azotobacter sp., and Trichoderma sp. The evaluation criteria comprised the assessment of direct effects at the time of exposure and after three days. The research results indicated that agrochemicals have a negative effect on experimental microorganisms. Specifically, when in direct contact, the chemical components ethoprophos, metalaxyl, and mancozeb contained in 2 out of 16 chemicals exhibited a 100% negative impact on all 5 species of microorganisms, while the other chemical components present in the remaining chemicals had an impact level of over 75%. Based on the experiments conducted, the results suggest that the appropriate time to use microbiological preparations is at an interval of 7 days after the application of the aforementioned agrochemicals.
Potential clay from Bali to support clean production in the Bali ceramic industry
Authors: Prayasa I W O , Winantari N K , Kristyawan I P A , Suradhamika I G A , Sugama A Y , Wiratma I G N P , Paster I W
Published: December 2023

The challenges for the Bali ceramics industry come from the emission side of the materials, production, and waste processing. In the future, the Balinese ceramics industry must develop to be greener and more sustainable. One of the way is reducing emissions from raw materials process. This research was conducted with the aim of mapping the potential of clay that can be used as a raw material for making ceramics, especially those from Bali. The method used was to review the literature on ceramic raw materials and conducted a survey to compile flow diagrams of materials, energy, and emissions from ceramic production in Bali. Then calculated the carbon dioxide (CO2) emissions that arise with the clay scheme come from inside and outside Bali. The results of the study indicate that there is potential for the use of clay from Buleleng and Tabanan areas, which can reduce carbon dioxide (CO2) emissions of the Balinese ceramic industry. However, its use needs to be re-examined from a process perspective because it has a higher iron oxide (Fe2O3) composition.
Linkage analysis of factors influencing the sustainability of Lake Singkarak in West Sumatra Province, Indonesia
Authors: Apriyanto H , Prasetya H , Warseno  , Suhendra A , Mukti S H , Kusharsanto Z S , Yulianto K
Published: December 2023

Lake Singkarak, located in the West Sumatra Province, resulted from a tectonic process affected by the Great Sumatran Fault. The lake has a total area of 107 km2 and is used for fisheries, tourism, hydroelectric power plant, etc. However, this lake is facing an array of issues and is even considered in a critical condition. Population growth, land use changes, agriculture development, and climate change are suspected to be the causes. It was also aggravated by the COVID-19 pandemic, wherein lake maintenance was neglected. The lake is a system, therefore maintenance of the lake cannot be performed partially and sporadically but must be integrated and comprehensive. This research analyses factors affecting the lake’s sustainability and the linkage between those factors. This research employed a system thinking approach. There are direct and indirect links between social, economic, and environmental factors, as illustrated in a Causal Loop Diagram. This diagram depicts how economic activities are constrained by available potential, which, at certain thresholds, may result in a drop in lake quality if managed in an unsustainable manner. Additionally, lake management appears to be an important factor in overcoming existing issues and establishing a sustainable lake.
Implementation of light shelves and WWR to improve daylight performance in university classroom
Authors: Apriliawan I , Fadhila N S , Alkadri M F
Published: December 2023

Daylight plays important role in achieving good Indoor Environment Quality (IEQ) because it contributes to human health and optimal working performance. The Engineering Center (EC) building, which is part of Universitas Indonesia in Depok, Indonesia has great daylight potential with an existing design Window-to-Wall Ratio (WWR) of 100%. However, this potential has yet to be maximized due to use of artificial lighting during the day. Moreover, the uneven distribution of sunlight entering the room creates some issues (i.e., glares, dazzled, heat and low uniformity level). This research tries to improve this condition by intervening in Window to Wall Ratio (WWR) and adding Light Shelves (LS) in class 101 (facing south) and 102 (facing north). 56 variations of WWR and LS were simulated using Rhinoceros (RH) and Grasshopper (GH) software with plug-ins (Ladybug and Honeybee). The simulation results show three design configurations WWR 60% - LS straight; WWR 78% - LS straight; and WWR 60% - LS curve in room number 102 facing north produce illuminance close to the maximum and minimum threshold for good lighting in the classroom (350 - 500 lx). This study will provide reference strategies for improving daylight performance in university classrooms with tropical climates.
Groundwater occurrence and its physicochemical properties on the northern slope of Mount Lawu, Ngawi, East Java, Indonesia
Authors: Handayani I N , Putro A B , Putra D P E
Published: December 2023

The exploitation of groundwater on the northern slope of Mount Lawu, Ngawi, East Java, Indonesia is increasing due to agricultural use. To maintain the existence and sustainability of groundwater, the first step is to know the groundwater occurrence in the area. The objective of this study is to analyze the groundwater occurrence in the study area, the groundwater flow pattern, and the physicochemical properties of groundwater such as pH, Temperature, Total Dissolved Solids (TDS), and Electrical Conductivity (EC). The research methodology involved field hydrogeological observation and analysis of data processing using the Geographic Information System (GIS). Hydrogeological observation activities involve direct observation and measurement of 4 springs, 14 deep wells, and 42 dug wells located on the northern slope of Mount Lawu. The result of this research indicates that in both shallow and deep groundwater, the pattern and groundwater flow direction are from south to north and then parallel to the flow of the Bengawan Solo River. The physicochemical characteristics of the deep well water show similarities to those of the dug well water. Based on the findings, the groundwater system in the research area can be presumably developed by only a single groundwater system or two interconnected groundwater systems.
Identify the use of Sekartaji Park in Kediri City as a creative public space
Authors: Pradnyapasa D A , Setiastuti N , Mulyono H , Sucipto A , Wiratmoko A , Dwiananto Y I , Warseno  , Sugarmansyah U
Published: December 2023

Urban development in sub-urban areas occurs due to the agglomeration of residential areas which form a functional unity in urban activities. Continuous urban development will give rise to urban sustainability problems, one of which is the lack of available green open space to support the natural ecological cycle of a sustainable urban environment. Green Open Space as Creative Public Space can boost the regional economy because it is able to attract people to gather for recreation, play and work and has opened up opportunities for the development of the creative economy market. The Green Open Space of Sekartaji Park, Kediri City, can become a Creative Public Space, but it still experiences obstacles so it must be arranged according to the criteria and function of Creative Public Space. This research aims to utilize green open space into public open space. This research uses a qualitative descriptive research method. Data collection was carried out using literature studies, interviews and observations. The results of this research are the use of green open space as Creative Public Space with facilities and infrastructure for local economic activities, creativity-innovation in art, culture and social interaction.
Synthesis of ion-imprinted polymers for speciation analysis of chromium(III)
Authors: Kurniawati F , Suwondo K P , Rusli H , Amran M B
Published: December 2023

A new sorbent based on ion-imprinted polymers has been successfully synthesized to examine chromium(III) in environmental water samples. In this study, Cr(III)−IIPs was synthesized using Cr(III)−DPCO complex as a templating molecule, and ethylene glycol dimethacrylate (EGDMA), methacrylic acid (MAA), and benzoyl peroxide (BPO) as crosslinking agent, functional monomer, and radical initiator, respectively. The fabricated Cr(III)−IIPs polymer was characterized using Fourier transform infrared (FTIR) spectroscopy and Scanning electron microscope (SEM). The FTIR results confirm that Cr(III)−IIPs has been successfully synthesized. A peak at 495 cm-1 indicated the stretching vibrations of Cr−N. The firm peaks at 1732 cm-1 and 1163 cm-1 are assigned to C=O and C−O stretching vibrations of methacrylic acid. The broad and strong peak at 3483 cm-1 corresponded to hydroxyl bonds between the templating molecule and functional monomer. The SEM images revealed that the morphology of the polymer was irregular and large. The Imprinting factor (IF) values of Cr(III)−IIPs/NIPs−DPCO and Cr(III)−IIPs/NIPs were 3.12 and 1.53, respectively. The sorbent developed by this technique can be selective to the target ions.
Behavioral-alike model-driven residential charger power projection in serving private electric mobility in the new capital city of Indonesia
Authors: Syamroni A W , Dinanta G P , Kurniasari A , Jamaluddin T A A
Published: December 2023

The provision of electric charging facilities in public areas, public transport depots, logistics depots, logistics consignment hubs, and residential areas is targeted for Indonesia’s new capital city (INCC) in pacing the (near to) zero-emission in the transport sector by 2045. Hence, the supportive electric mobility infrastructure should gradually be merged from the design stage to achieve directed goals. However, since the planning process for grid-supporting infrastructure is undergoing or within the preliminary phase or has not been done yet, there is a lack of required data, i.e., the rollout number of electric vehicles (EVs) units, sizing areas, and the compliance interconnection feeder. Meanwhile, using practical estimations or averaging techniques could lead to significant discrepancies, particularly regarding grid-supportive investment planning, i.e., redesign for grid capacity assets. On that concern, the paper constructs a model-driven using the predictive Monte Carlo method (MCM) to generate power load patterns, mimicking behavior-alike of residential home chargers for two|three|four wheeled EVs (2|3|4 WEVs) providing high-resolution power consumption data over unknown parameters related to the EVs properties, user behavior charging timeframes, and the expected tailor-made platform (sizing and allocation). Therefore, the findings are expected to be evidence-based replanning policy for policymakers, energy planners, and utilities.
Genetic Resources in South Bangka (protection of communal intellectual property amidst environmental destruction)
Authors: Darwance  , Haryadi Dwi , Sari Rafiqa , Herza
Published: December 2023

Since the distance past, Indonesia has been notable for its abundant biological resources. This is partly influenced by the geographical factors. This abundance is also possessed by the Bangka Belitung Islands, including South Bangka Regency. Based on data processed from the National Data on Indonesian Communal Intellectual Property, there are six traditional cultural expressions and seven ancestral knowledge recorded in South Bangka. This means that no genetic resources are legally registered. However, there is a lot of potential. Moreover, this district geographically differs remarkably from other regions, one of which is its numerous small islands. On the other hand, this area comprises tin mining locations which have a direct impact on the environment, including sites that have been recognized as habitats for genetic resources, both flora and fauna. This research uses empirical judicial methods, associating regulations with the facts that occur. The data used is primary data obtained from interviews and focus groups discussion, as well as secondary data obtained from literature studies of a number of documents. The results of the studies carried out showed that the protection of communal intellectual property of genetic resources is facing several serious problems, one of which is environmental damage. This is due to the massive tin mining activities, as well as the pepper gardening system which has always been on the move since earlier period. This means that environmental management in the region has an impact on the protection of genetic resources, including legitimately.
Investigating roster brick based on multi-objective optimization between daylighting, wind velocity and structural displacement
Authors: Yuliana Y , Agung M R C , Rahman M A , Widyarko W , Alkadri M F
Published: December 2023

Roster brick or commonly known as breeze blocks is one of the most used building elements in tropical countries because of its functionality and versatility. Its function varies from being used as a vent in service areas to an element for architectural façade. This hollow concrete block can be used not only for aesthetic values but also for improving passive design strategies through air and daylight. However, the geometric configuration of the roster is currently still relying on the creativity and intuition of the roster’s craftsmen. Therefore, this study investigates the optimal roster geometry shape which accommodates multiple performances by using the integration of multi-objective optimization (MOO) and material fabrication methods. The use of MOO serves the purpose of finding near-optimum solutions among conflicting building performance objectives. The MOO result is 57 generations with 90 genes identified in the last generation. The first near-optimum design options are capable of obtaining daylighting as much as 87% with UDI metric, flowing wind velocity up to 1.98 m/s, and experiencing structural displacement until 0.36 mm. This study provides a valuable contribution to form-finding a high-performance building element, in this regard roster brick.
Rice Husk Silica Research in Indonesia: A Blibiometric Analysis Based on Scopus
Authors: Lailiyah Q , Aryana N , Kurniawan H H , Hapiddin A , Mulyana M R , Basuki B , Nanto D , Darmayanti N T E , Zuas O
Published: December 2023

To gain deeper and more understanding the research on rice husk SiO2 in Indonesia, in this study, a bibliometric software VOSViewer was used to analysis relevant literature in the field. Scientific documents were retrieved from Scopus database between 1 January 2000 to 25 April 2023. Bibliometric indicators, including growth of publications, most prolific authors and institutions, most productive document sources, most cited papers, and cluster analysis were used and were presented using general statistic. Analyse results indicate that the number of documents on rice husk SiO2 in Indonesia have increased significantly, especially during the last seven years. Professor Wasinton and Lampung University were ranked first as the most prolific author and institution, respectively. Many documents have been published the IOP Conference Series Earth and Environmental Science and a document published in s. In addition, network analysis can be used to identify potential research collaboration among institute to address gaps and challenges, and to avoid unnecessary research overlap.
A computational study photophysical properties of a series phenothiazine-linked-BODIPY as D-D-π-a photosensitizer unit for photo-induced hydrogen production from water
Authors: Suryani O , Parbuntari H , Sari T K , Mawardi M
Published: December 2023

Phenothiazine-derivatives are designed as sensitizers which covalently-linked with BODIPY for application in a system of dye-sensitized photoelectrochemical cells (DSPECs). A series of phenothiazine-linked-BODIPY as D-D-π-A chromophore have been investigated by a computational approach for studying the capability of the photosensitizers for application in photoinduced water splitting hydrogen production in DSPECs. The geometries of sensitizers at the ground state and excited state were optimized by the CAM-B3LYP/6-31G (d,p) level method. The theoretical study has been done in order to investigate the photophysical properties such as absorption profile, HOMO-LUMO energy and surface plots of the photosensitizer. The result of calculation for HOMO-LUMO energy level of each dyes showed that the LUMO energy are ranging more than -2.8 - (-2.86) eV which is higher than -4.0 eV of conduction band of TiO2 as semiconductor in DSPEC, meaning that all these dyes could be used as photosensitizers in DSPECs. In addition, the oscillator strength data of each dyes showed the dyes have absorption profile in visible region, meaning the dyes could harvest higher intensity of sunlight to induce water splitting reaction to produce hydrogen.
Effect of Product Quality Perceptions on Satisfaction and Re-consumption Intention of Aruk Rice with The Addition of an Eco-Friendly Starter
Authors: Karsiningsih E , Helmi H , Setiawan I
Published: December 2023

Aruk rice is a typical food from the Bangka-Belitung Islands Province. Aruk rice is made from fermented cassava to extract and process the flour into granules. Much research has been done on aruk rice made traditionally. One of the main problems in making Aruk rice is that it takes a long time, which is 7–10 days. This affects the production rate of Aruk rice. Adding a starter can overcome the relatively long process of making Aruk rice. The purpose of this study was to analyze the effect of perceived product quality on satisfaction and the intention to re-consume Aruk rice with the addition of a starter. The research method uses a survey method. The sampling technique used was purposive sampling with a total of 100 respondents. Respondents in this study were people who had consumed traditional Aruk rice. Research data were analyzed by SEM-PLS using SmartPLS Software version 4.0. The results showed that directly, perception of product quality had a positive and significant effect on people’s satisfaction when consuming Aruk rice with the addition of an environmentally friendly starter. However, the perception of product quality has a negative and significant effect on the intention to re-consume Aruk rice with the addition of an environmentally friendly starter. People prefer to consume Aruk rice traditionally because they are used to it. Nonetheless, it was observed that satisfaction positively and significantly influenced the intention to re-consume Aruk rice when the environmentally friendly starter was used. Moreover, the perception of product quality indirectly influenced the re-consumption intentions of Aruk ricebby adding the starter. These finding offer an opportunity for Aruk rice makers to enhance the product’s quality to meet consumer desires, potentially increasing consumer intentions to re-consume Aruk rice.
Design a smart system using arduino and website to support smart buildings
Authors: Putra G B , Kurniawan R , Vista U F
Published: December 2023

In the era of the industrial revolution 4.0, technology has added the word smart to the devices offered, such as smartphones, smart televisions, smart watches, smart motorbikes and others. It is certainly a challenge for the world of education to overcome this smart era so they will not get left behind and not have competitiveness in the current period. The first step is, to begin with the building as a place for lecture activity for students by using information technology that trends recently to implement the smart campus. The Smart System concept is targeted to support smart buildings with Internet of Things (IoT) features with Arduino support and a website-based management system which a new design for monitoring the usage of water and electrical. With this smart system, it provides a learning process using IoT technology which rapidly grows at this time and is supported by a 4G internet network, so that students will get a better learning experience and understanding so they can easily master learning material. IoT technology controls electrical devices such as lights and air conditioners and adds cameras to support learning and monitoring processes. This smart building also uses motion sensor camera technology to assist in monitoring activity within the building.
Performance analysis of automotive air conditioning systems with electric compressors using R1234yf refrigerant: Insights into power consumption, cooling capacity, and energy efficiency
Authors: Sharif M Z , Azmi W H , Ismail M F , Awalludin M M N , Ghazali M F , Aminullah A R M
Published: December 2023

R1234yf, a low global warming potential (GWP) refrigerant, offers a promising alternative to traditional refrigerants like R134a. This study analyzes automotive air conditioning systems (AAC) equipped with electric compressors and utilizing R1234yf refrigerant. The interrelationships between refrigerant charge, compressor speed, power consumption, cooling capacity, and energy efficiency are examined. The results show that increasing refrigerant charge and compressor speed leads to higher power consumption due to increased compressor work. However, higher refrigerant charges and compressor speeds improve cooling capacity in line with heat transfer principles. As refrigerant charge and compressor speed increase, the energy efficiency, measured by the Coefficient of Performance (COP), tends to decrease, indicating a trade-off between cooling capacity and energy efficiency. Optimizing refrigerant charge and compressor speed is crucial to strike a balance between cooling performance and energy efficiency. R134a outperforms R1234yf, with an average percent difference in COP approximately 25% higher at all compressor speeds. This study contributes to the understanding of AAC system performance and guides the development of energy-efficient automotive air conditioning. Future research can further explore system components and conditions to enhance energy efficiency and advance air conditioning technology.
Thermal analysis of electrolyte biopolymer degradation from brown seaweed (Turbinaria sp)
Authors: Asriza R O , Nadia  , Nurhadini
Published: December 2023

The biopolymer electrolyte can potentially develop solar cells, batteries and fuel cells. Biopolymer This electrolyte can be synthesized from alginate extracted from brown seaweed (Turbinaria sp). This study aims to analyze the thermal properties of biopolymer electrolyte degradation. The biopolymer electrolyte has been degraded through exposure to sunlight and UV light. The results of the TGA analysis showed a mass reduction of the biopolymer electrolyte exposure UV light by 7.15% at a temperature of 120 °C – 267 °C. This is due to oxidation-reduction reactions that cause the bonds to break in the polymer chain.
Performance of secondary skin on optimizing the distribution of natural lighting in building
Authors: Kustiawan E , Felly R , Syafrina A
Published: December 2023

The high intensity of sunlight in Bangka Belitung Islands has a potential to get natural lighting throughout the day. Previous research found that facades with wide glass dimensions in the Asian Region with a tropical climate, on average, are not equipped with shading devices. This causes an uneven distribution of sunlight in the room and makes users feel visual discomfort. Natural lighting should be able to work optimally utilizing secondary skin on building facades. The secondary skin can be more optimal in energy use compared to a single skin to control the entry of direct sunlight. This plays a role in creating visual comfort. The secondary skin can also work in an aesthetic part to give an attractive image, such as an element of the locality. This study aims to obtain optimal secondary skin modules. The method used is a quantitative experiment to see the daylight uniformity in the lecturer’s workspace through the application of patterns on secondary skin and simulation software Velux Daylight Visualizer 3.1 and doing descriptive analysis to get the optimal module to achieve uniformity. Through this research, it was found that the percentage of different modules affects the distribution of light entering the building.
Effect of microwave assisted extraction on total phenolic, flavonoids, and antioxidant from Stenochlaena palustris leaves
Authors: Lidia  , Mahardika R G
Published: December 2023

Degenerative disease is a disease caused by too many free radicals in the body. To neutralize, reduce, and inhibit the formation of new free radical compounds in the body, antioxidant compounds are needed. One source of antioxidants can come from plants that contain phenolic compounds. S. palestris plant is one of the plants from Bangka Belitung which contains phenolic compounds. The purpose of this study was to determine the effectiveness of the microwave assisted extraction method for the total phenolic and flavonoid content and antioxidants in the chloroform, acetone, and methanol extracts of S. palustris leaves with MAE times of 5, 10, 15, and 30 minutes (60° C, 1200 Watts). Based on the results of the analysis of the average yield values, total phenolics, total flavonoids, and antioxidant activity of the leaves of S. palustris using the MAE method had higher results compared to maceration. Based on the time difference used, the 5 minute MAE time has a higher value than the 10, 15, and 30 minute time. In terms of the extraction time used and the results obtained, the MAE method is more efficient and effective than the maceration method.
Analysis of difference in results of overburden production volume using Surpac 6.5.1 software and truck count method at Pit 2 PT. Baturona Adimulya
Authors: Harsiga E , Pebrianto R
Published: December 2023

The overburden production volume at PT Baturona Adimulya was known from two methods of measurement: joint survey activities to produce survey progress data and truck count methods. The total volume of overburden excavation based on the survey results from January until October was 2.415.231 BCM, while the truck count was 2.522.862 BCM, which was known from the daily report of OB removal data from January to October by the surveying division of PT AWU. There is a difference in results every month for both methods. The biggest difference occurred in June at 27.289 BCM, with the total difference in the calculation of overburden volume from January to October at 107.631 BCM. Observations in the field revealed several factors that caused difference between the calculation of the excavation volume based on the survey and the truck count from January–October. Factors that influence the difference from the number difference of 107.631 BCM are double handling, load variation, type of overburden material, the material is still attached to the vessel (1.2182 m3 per trip on the Isuzu giga fvz, 1.2061 m3 per trip on the Cat D400E ADT, 1.0936 m3 per trip), human error, and errors in the implementation of measurement activities.
Design of community creative industry building: A green building approach
Authors: Harmini  , Fitriaty P , Burhany N R
Published: December 2023

Plastic waste remains the top crucial problem besides energy security in today’s life. It takes tens to hundreds of years to decompose, harming living things and the environment. Recycling activities can help reduce plastic waste and enhance the creativity of young people, students, and the community by producing new products from plastic waste. A community creative industry building design is proposed in this study by highlighting plastic recycling activities considering three principles: reduce, reuse and recycle. The Green Building approach was used in this study as a design form generator for it conforms to an environmentally friendly approach. The case study of this research is in Palu City, Indonesia. The Greenship for New Building Assessment version 1.2 by the Green Building Council Indonesia (GBCI) was implemented by utilising the logical argumentation method in the early design stage. The green building approach was implemented in the building site design, building form and envelope, and building interior. For active clean energy production, photovoltaics were installed on the rooftop with a tilt angle of 5°. From the conceptual analysis result, the proposed design can achieve a gold rating by obtaining 51 points in the Greenship assessment list for New Building version 2.1.