bluuebunny/crossref_metadata_2025 huggingface dataset:
TEM observation of nano-twinned precipitation phase Al3Mg2
Authors: Zhao Yadong , He Yangyang , Lu Yaowen , Cui Hongbao , He Han
Published: October 2022

Friction stir welding (FSW) is a solid-phase bonding technique, which is suitable for bonding aluminium/magnesium dissimilar metals. In the present work, a nano-precipitated phase in 1060 Al/AZ31B Mg FSW joint was observed and analysed by transmission electron microscopy (TEM) and high-resolution electron microscopy (HRTEM). The type and morphology of the precipitated phase were determined. The results showed a nano-twinned precipitation phase, Al3Mg2, which was elliptical in shape and approximately 300 nm in size. In addition, the effective stacking fault energy (SFE) of nano-twinned Al3Mg2, approximately 3.51 mJ m−2, was calculated using the first principles and the effective SFE equation. A low effective SFE was beneficial to the crystal twinning of Al3Mg2.
Micromechanical valve-operated needle-on-a-chip microinjection module for microfluidic large-scale integration
Authors: Gray-Scherr Delaney , Gasvoda Hudson , Hadsell Alex , Miller Leilani , Demir Ebru , Araci I Emre
Published: October 2022

Microinjection is an essential process in genetic engineering that is used to deliver genetic materials into various biological specimens. Considering the high-throughput requirement for microinjection applications ranging from gene editing to cell therapies, there is a need for an automated, highly parallelized, reproducible, and easy-to-use microinjection strategy. Here we report an on-chip, microfluidic microinjection module designed for compatibility with microfluidic large-scale integration technology that can be fabricated via standard, multilayer soft lithography techniques. The needle-on-chip (NOC) module consists of a two-layer polydimethylsiloxane-based microfluidic module whose puncture and injection operations are reliant solely on Quake valve actuation. As a proof-of-concept, we designed a NOC module to conduct the microinjection of a common genetics model organism, Caenorhabditis elegans (C. elegans). The NOC design was analyzed using finite element method simulations for a large range of practically viable geometrical parameters. The computational results suggested that a slight lateral offset (>10 μm) of the control channel is sufficient for a successful NOC operation with a large fabrication tolerance (50 μm, 50% channel width). To demonstrate proof-of-concept, the microinjection platform was fabricated and utilized to perform a successful injection of a tracer dye into C. elegans.
Understanding the effects of temporal waveform modulation of the laser emission power in laser powder bed fusion: Part I - Analytical modelling
Authors: Caprio Leonardo , Demir Ali Gökhan , Previtali Barbara
Published: October 2022

The architecture of contemporary fiber laser sources enables users a wide choice in terms of spatial and temporal profiles during the laser powder bed fusion (LPBF) process. Given the range of possibilities, the need for analytical modelling approaches to predict the consequences of waveform modulation in terms of both thermal and fluid-dynamic aspects over the powder bed, process dynamics and resulting part quality is of great interest. Within the present investigation a moving point source analytical model was developed to study the effect of temporally modulated laser beams over the temperature distribution and recoil pressure induced over the molten region during single track LPBF depositions. This study configures as the first part of an investigation on the topic presented with the aim of developing the modeling framework to predict the effects of temporal waveform modulation in the LPBF process. The model developed was implemented numerically to simulate the single track LPBF deposition of stainless steel AISI316L with different waveform shapes ranging from the conventional Square Wave emission to Ramp Up, Ramp Down and Triangle waveforms. Modulation at different amplitude levels and different waveform frequencies were also investigated. Results show that temperature variations followed the temporal profile of the power exposed over the material. Consequently, recoil pressure oscillations over the melt region exhibited a periodic profiles correlated to the waveform modulation of the laser power indicating that melt flow may be controlled by means of such techniques. Peak values of recoil pressure, which might be symptomatic of melt pool instabilities, could be reduced employing higher levels of modulation frequency or lower oscillation amplitudes between non-zero values of the emission power.
Giant magneto optical properties in the double perovskites Ba2BʹRuO6 (Bʹ = Er, Tm)
Authors: Guenez Wafa , Bouguerra Abdesselam , Touaibia Ilham , Chemam Faïçal
Published: October 2022

This study aimed to investigate new double perovskite oxides in search of new promising functional material with properties of interest for high density storage applications. The crystal structure, magnetic, electronic and magneto-optical properties of the rare-earth-based double perovskites Ba2BʹRuO6 (Bʹ = Er, Tm) were investigated through full-potential linearized augmented plane wave method within the context of density functional theory (DFT) in Wien2k code. We used generalized gradient approximation (GGA) and GGA + U approaches to calculate magneto-optical properties, including spin–orbit coupling due to 4f and 4d-electrons. The obtained DFT-optimized structures was cubic (space group: Fm = 3m), and the calculations (GGA + U) showed that the compounds Ba2ErRuO6 is semiconductor and the Ba2TmRuO6 is half-metal. The magneto-optical Kerr effect showed pronounced peaks at angles of 17.7∘ and 5.6∘ for an energy around 0.2 eV for both compounds, which could potentially have important applications in the infrared region or for blue and violet radiation.
Intelligent reversible electrochromic flexible electronic fabric based on electronic ink microcapsules
Authors: Yin Chaoyi , Liu Ruifang , Zheng Zhangyou , Ba Long
Published: October 2022

In the last several decades, electronic ink (e-ink) microcapsules have been extensively employed in display screens owing to their high reflectivity and contrast under visible light irradiation, as well as their flexibility, low cost, and low power consumption. Herein, a simple coating technique serves to combine e-ink microcapsules containing multiple color particles with fabrics to design an intelligent reversible electrochromic flexible electronic fabric. E-ink microcapsules, transparent Ag nanowires (T-AgNWs), and single-walled carbon nanotubes (SWCNT) are sequentially and uniformly coated on the surface of the double-layer conductive strip structure composed of conductive fabric and insulating fabric. The electrophoretic discoloration of the e-ink microcapsules can be achieved by applying voltages of a certain magnitude between the bottom conductive fabric strip layer and the T-AgNWs/SWCNT composite conductive layer. Large-area flexible electrochromic fabrics can be formed by weaving strips coated with e-ink microcapsules materials based on the results of the continuous bending and soaking experiments, which has great application potential in the research of adaptive camouflage smart fabrics in the visible light field.
Soliton solutions to the nonlinear higher dimensional Kadomtsev-Petviashvili equation through the new Kudryashov’s technique
Authors: Esen Handenur , Secer Aydin , Ozisik Muslum , Bayram Mustafa
Published: October 2022

In this paper, we studied the (3 + 1)-dimensional nonlinear Kadomtsev-Petviasvili equation (3D-KPE) that is utilized in order to describe 3D solitons in weakly dispersive media, long wavelength water waves with weak nonlinear restoring forces, waves in ferromagnetic media, nonlinear wave propagation in supefluids, plasma physics and fluid dynamics by using the recently presented the new Kudryashov’s method. We successfully applied the new Kudryashov’s scheme to the investigated problem for the first time to achieve bright and singular soliton; besides, we showed that the technique is effective, easily applicable, and reliable in solving such nonlinear problems. Moreover, the necessary comments were given by obtaining appropriate soliton solutions and presented 3D and 2D graphics.
Classification of gamma-ray targets for velocity-dependent and subhalo-boosted dark-matter annihilation
Authors: Lacroix Thomas , Facchinetti Gaétan , Pérez-Romero Judit , Stref Martin , Lavalle Julien , Maurin David , A. Sánchez-Conde Miguel
Published: October 2022

Gamma-ray observations have long been used to constrain the properties of dark matter
(DM), with a strong focus on weakly interacting massive particles annihilating through
velocity-independent processes. However, in the absence of clear-cut observational evidence for
the simplest candidates, the interest of the community in more complex DM scenarios involving a
velocity-dependent cross-section has been growing steadily over the past few years. We present
the first systematic study of velocity-dependent DM annihilation (in particular p-wave
annihilation and Sommerfeld enhancement) in a variety of astrophysical objects, not only including
the well-studied Milky Way dwarf satellite galaxies, but nearby dwarf irregular galaxies and local
galaxy clusters as well. Particular attention is given to the interplay between velocity
dependence and DM halo substructure. Uncertainties related to halo mass, phase-space and
substructure modelling are also discussed in this velocity-dependent context. We show that, for
s-wave annihilation, extremely large subhalo boost factors are to be expected, up to 1011
in clusters and up to 106–107 in dwarf galaxies where subhalos are usually assumed not to play
an important role. Boost factors for p-wave annihilation are smaller but can still reach 103
in clusters. The angular extension of the DM signal is also significantly impacted, with e.g. the
cluster typical emission radius increasing by a factor of order 10 in the s-wave case. We also
compute the signal contrast of the objects in our sample with respect to annihilation happening in
the Milky Way halo. Overall, we find that the hierarchy between the brightest considered targets
depends on the specific details of the assumed particle-physics model.
Analysis of high-temperature performance of 4H-SiC avalanche photodiodes in both linear and Geiger modes
Authors: Zhou Xing-Ye , Lv Yuan-Jie , Guo Hong-Yu , Gu Guo-Dong , Wang Yuan-Gang , Liang Shi-Xiong , Bu Ai-Min , Feng Zhi-Hong
Published: October 2022

The high-temperature performance of 4H-SiC ultraviolet avalanche photodiodes (APDs) in both linear and Geiger modes is extensively investigated. During the temperature-dependent measurements, a fixed bias voltage is adopted for the device samples, which is much more practical and important for high-temperature applications. The results show that the fabricated 4H-SiC APDs are very stable and reliable at high temperatures. As the temperature increases from room temperature to 425 K, the dark current at 95% of the breakdown voltage increases slightly and remains lower than 40 pA. In Geiger mode, our 4H-SiC APDs can be self-quenched in a passive-quenching circuit, which is expected for high-speed detection systems. Moreover, an interesting phenomenon is observed for the first time: the single-photon detection efficiency shows a non-monotonic variation as a function of temperature. The physical mechanism of the variation in high-temperature performance is further analyzed. The results in this work can provide a fundamental reference for researchers in the field of 4H-SiC APD ultraviolet detectors.
Laser-modified luminescence for optical data storage
Authors: Wei Xin , Zhao Weiwei , Zheng Ting , Lü Junpeng , Yuan Xueyong , Ni Zhenhua
Published: October 2022

The yearly growing quantities of dataflow create a desired requirement for advanced data storage methods. Luminescent materials, which possess adjustable parameters such as intensity, emission center, lifetime, polarization, etc., can be used to enable multi-dimensional optical data storage (ODS) with higher capacity, longer lifetime and lower energy consumption. Multiplexed storage based on luminescent materials can be easily manipulated by lasers, and has been considered as a feasible option to break through the limits of ODS density. Substantial progresses in laser-modified luminescence based ODS have been made during the past decade. In this review, we recapitulated recent advancements in laser-modified luminescence based ODS, focusing on the defect-related regulation, nucleation, dissociation, photoreduction, ablation, etc. We conclude by discussing the current challenges in laser-modified luminescence based ODS and proposing the perspectives for future development.
ELMs filaments extraction on divertor visible high-speed camera system of EAST
Authors: Yan Hailong , Han Xiaofeng , Yang Jianhua , Hu Jiahui , Wang Jichao
Published: October 2022

In order to study the ELMs filamentary structure generated
by plasma in H-mode, a tangential visible camera system was
established on EAST Tokamak. However, the obtained ELMs filamentary
structure cannot be accurately and quickly identified, which is not
conducive to the study of ELMs filamentary structure. In this paper,
the ELMs filamentary structure is preliminarily extracted by the
background subtraction method. The background modeling method adopts
multi-frame averaging followed by contrast stretching of the
image. Although the ELMs filamentary structure can be clearly seen
in the obtained image, there exists a lot of noise, so further
extraction of the ELMs filamentary structure is needed. In this
paper, the neural network model U-Net is used for image
segmentation. Compared with the traditional threshold segmentation,
the ELMs filamentary structure and noise can be accurately
distinguished, and ELMs filaments are better extracted. The results
show that the method presented in this paper is suitable for the
extraction of ELMs filamentary structure and beneficial to the study
of ELMs filamentary structure.
Analysis of suction-based gripping strategies in wildlife towards future evolutions of the obstetrical suction cup
Authors: Vallet Y , Laurent C , Bertholdt C , Rahouadj R , Morel O
Published: October 2022

The design of obstetrical suction cups used for vacuum assisted delivery has not substantially evolved through history despite of its inherent limitations. The associated challenges concern both the decrease of risk of soft tissue damage and failure of instrumental delivery due to detachment of the cup. The present study firstly details some of the suction-based strategies that have been developed in wildlife in order to create and maintain an adhesive contact with potentially rough and uneven substratum in dry or wet environments. Such strategies have permitted the emergence of bioinspired suction-based devices in the fields of robotics or biomedical patches that are briefly reviewed. The objective is then to extend the observations of such suction-based strategies toward the development of innovative medical suction cups. We firstly conclude that the overall design, shape and materials of the suction cups could be largely improved. We also highlight that the addition of a patterned surface combined with a viscous fluid at the interface between the suction cup and scalp could significantly limit the detachment rate and the differential pressure required to exert a traction force. In the future, the development of a computational model including a detailed description of scalp properties should allow to experiment various designs of bioinspired suction cups.
Opposite eco-hydrological processes in flood and drought years caused comparable anomaly in dry-season canopy growth over southern Amazon
Authors: Zhang Huixian , Liu Yi
Published: October 2022

While the influences of droughts on Amazon rainforest have been extensively examined, little attention was paid to the extremely wet years characterized by low radiation which may limit the rainforest growth. Here, based on a series of satellite-observed vegetation and hydro-meteorological products, we found a two-stage canopy growth anomaly in the record-breaking wet year 2009, i.e. negative anomalies during April–July followed by positive ones during August–November. Our analysis suggests that, in April–July, low radiation associated with above-average rainfall and cloud cover was the most likely cause for negative anomalies in the canopy growth. In August–November, the rainfall and cloud cover were close to the average, but the solar radiation reaching the land surface was considerably above the average. This was because the atmospheric aerosols were extremely low, resulting from reduced biomass burning activities under the wet conditions. Large-scale positive anomalies in the canopy growth were observed during this 4 month period, mainly driven by the above-average radiation. During the severe drought year 2005, the forest canopy growth also experienced a two-stage process, but in the opposite order from the one in 2009. In April–July, enhanced canopy growth was observed in response to the above-average radiation. With the drought progress and soil water depletion, the canopy senescence was observed during the drought peak in August–November. Interestingly, if we examined the regional canopy growth anomaly during the typical dry season (i.e. July–September), both years showed similarly negative anomalies, but resulting from opposite eco-hydrological processes. This study identifies the explanation for the negative anomalies in the dry-season canopy growth over southern Amazon rainforest in both flood and drought years, and also underscores the necessity to separate different hydro-meteorological stages to better understand vegetation responses to extreme events.
The Content of Bioactive Compounds, Nutrients, and Antioxidant Activity of Karamunting Fruit from Tarakan Island
Authors: Ismandari T
Published: October 2022

The purpose of this study was to determine the content of bioactive compounds, chemical content and antioxidant activity of karamunting fruit. The dietary fiber content of 100 grams of karamunting fruit is 83.37%, vitamin E (alpha-tocopherol) 10.25 mg/100 fresh fruit, lipids (2.96% of the RDI) with the predominant fat being linoleic acid (67.25% of total fatty acids), and sugar (6.25% of the RDI). TPC (Gallic Acid Equivalent)/total phenol 12.05 mg/100 g, total anthocyanins 3.63 mg/gram, total flavonoids 23.51 mg QE/gram, every 100 grams of karamunting fruit contains 4.6 grams of protein, and antioxidant (Inhibition Concentration 50) 1,028 (μg/ ml) is categorized as very strong, and 33 bioactive compounds. The karamunting plant that grows on Tarakan Island, North Kalimantan Province-Indonesia, which so far has no economic value and is underutilized, is proven to contain bioactive compounds that have very high antioxidant values, besides that they also contain high dietary fiber, essential fatty acids, and beneficial phenolic compounds. for health. In karamunting fruit, 33 bioactive compounds were also found, and 17 of them were new bioactive compounds that had not been discovered by previous researchers.
Introducing the Ferns through Comics: Visualisation of Ethnopteridology Study of Dayak Lundayeh Tribe
Authors: Abrori Fadhlan Muchlas , Saraswati  , Wijarini Fitri , Fatmawati
Published: October 2022

This study aims to conduct an ethnopteridology survey of the Dayak Lundayeh tribe and develop the study’s results in comics as a medium for dissemination to the public. This study used the Participatory Rural Appraisal (PRA) method to inventory the fern species used by the Dayak Lundayeh Tribe. Furthermore, the calculation of the Relative Frequency of Citation (RFC) and Fidelity Level (FL) for each fern was conducted to see how popular and essential the fern is. The research results were then developed in the form of comics using the Borg & Gall model. The results of this study found 17 species of ferns which were divided into eight families, the most prominent family being Polypodiaceae. Based on the calculation of the RFC of each fern, it got a range of 0.69-0.98. Meanwhile, the FL calculation received a range of 65.48% - 100%. The results of comic development based on the average assessment of content expert, media expert, and community responses, respectively, get the following percentages of 85%, 88%, and 97%.
Antibacterial and Natural Pesticide Properties of Nyiri (Xylocarpus granatum)
Authors: Egra Saat , Hartini  , Mardhiana  , Nurjannah  , Adiwena Muhammad , Santoso Dwi , Kuspradini Harlinda , Mitsunaga Tohru
Published: October 2022

Nyiri (Xylocarpus granatum) thrives in the mangrove areas of Indonesia, especially Tarakan, North Kalimantan. X. granatum is one of many species found in the Tarakan mangrove forest and belongs to the Meliaceae family. This plant has been utilized by communities for pesticides and health care. So, the purpose of this study is to determine the potential of X. granatum in inhibiting the growth of Ralstonia solanacaerum and Propionibacterium acnes. This study we used well agar diffusion methodology with a concentration of 5000 ppm, 10,000 ppm, 20,000 ppm. Positive controls in this study were Chloramphenicol and 40% ethanol as negative control. The determine variables are the percentage of inhibition diameters (DDH). The percentage of DDH shows that the ethanol extract of leaves and bark X. granatum against R. solanacearum and P. acne at a concentration of 5000 ppm was not able to inhibit, whereas the concentration of 10,000 ppm and 20,000 ppm was able to inhibit the R. solanacearum with a percentage of 31.09 respectively % and 34.46%. Whereas, the bark extract was able to inhibit R. solanacearum with the percentage of DDH at a concentration of 10,000 ppm was 35.73% and 20,000 ppm was 39.94%. Furthermore, ethanol extract of X. granatum leaves against P. acne was able to inhibit the concentration of 10,000 ppm with a value of 33.83% and 20,000 ppm with a value of 38.01%. The percentage of DDH for X. granatum bark is able to inhibit P. acne at all concentrations, namely at concentrations of 5000 ppm (35.34%), 10,000 ppm (39.59%) and 20,000 ppm (41.63%).
The Effect of Organic Matter on The Soil Innoculated Mycorrhizal on The Persentage of Root Infection and Growth of Mung Bean Plants
Authors: Subaedah St. , Netty  , Nonci Maimunah , Rosada Ida
Published: October 2022

This study was conducted to analyze the effect of organic matter application on mycorrhizal inoculated soil on the percentage of AMF infection and the availability of phosphorus nutrients for the growth of mung beans. The research was conducted at the Green House, Universitas Muslim Indonesia, and in the Microbiology laboratory of the Environmental and Forestry Research Institute, Makassar, which was carried out from May to August 2021. This research was conducted in an experimental form based on a completely randomized design consisting of four treatments with three replications. The treatments tested were planting media, namely sand + soil (without organic matter), sand + soil + husk, sand + soil + husk charcoal, and sand + soil + husk + husk charcoal. Parameters observed in this study were total soil P nutrient content, available P content, percentage of mycorrhizal infection, plant height, number of leaves, root length, and root volume. The results showed that the percentage of root infection with the application of organic husk material obtained the percentage of root infection up to 83.67%. Plant growth and nutrient levels of total P and available P were higher with the application of husk organic matter and husk charcoal.
Lemon Pepper’s Kidney Protection Effect against Kidney Injury Induced by Cadmium in Male Wistar Rats
Authors: Tanaka Sutanto , Ginting Chrismis Novalinda , Chiuman Linda , Nasution Ali Napiah
Published: October 2022

Cadmium can accumulate in the renal cortex and lead to renal failure. Hence, this study was designed to investigate lemon pepper’s kidney protection effect against cadmium toxicity. Twenty-five male Wistar rats were grouped into five groups viz. Control (0.5% Na-CMC), standard (25 mg/ kg BW quercetin), Lemon Pepper methanol extract (LPME)-1 (300 mg/ kg BW), 2 (600 mg/ kg BW), and 3 (1,200 mg/ kg BW). These interventions were performed for 14 days; at the first seven days, all rats received some interventions based on intervention group without cadmium administration followed by cadmium administration for the next seven days. After that, all rats were sacrificed for kidney function tests and histology studies. The highest BUN level was found in the control group (103.20 ± 3.11 mg/dL) and the lowest was the standard group (57.60 ± 2.41 mg/dL). Meanwhile, the highest creatinine levels were found in the control group (1.06 ± 0.02 mg/dL), and the lowest was found in the standard group (0.83 ± 0.07 mg/dL). Moreover, the LPME-3 group also rescued some glomerular structures and reduced cyst formation due to severe kidney damage. Therefore, it can be concluded that the lemon pepper had a kidney protection effect against cadmium toxicity.
Prevention Strategy for Covid-19 by Healthy Mobility
Authors: Sihotang Widya Yanti , Siregar Santy Deasy , Siagian Masryna , Ginting Rapael , Hartono  , Wau Herbert , Sinurat Buenita , Lolita Eka , Pakpahan Eliyanti
Published: October 2022

Covid-19 become the third major respiratory disease outbreak related to the coronavirus. Globally, there were 177.108.695 confirmed cases with 3.840.223 deaths (CFR 2.1%). The number of positive cases Covid-19 continue to grow and needs the right action to stop the spread of the virus. The purpose of this study was to determine the Covid-19 prevention strategy by healthy mobility. This study used an analytic reseach with a cross sectional design. The population of this study was all people aged >18 years in Medan City with a sample of 395 respondents was obtained. The instrument of this research was google form. The instrument of this research was google form. There were 93.7% of people whose not good at avoiding crowded places whereas 51.9% of people with high mobility. The results of Simple Linear Regression Test showed that there was a moderate relationship between mobility and positive cases of Covid-19 (r = 0.300) with a negative pattern. This means that if people’s mobility is reduced, the cases exposed to Covid-19 will be decreased. The result of this study indicates the prevention strategy by Healthy Mobility is a promising strategy and useful for stalling the spread of Covid-19.
The Hospital Health Promotion Toward Clean Healthy Living Behavior in the Covid-19 Era
Authors: Sianturi Ade Rizky , Ginting Chrismis Novalinda , Nasution Sri Wahyuni , Erawati Suci
Published: October 2022

Hospital Health Promotion (HHP) is an effort by hospital management to improve the ability to accelerate patient recovery and improve their health by implementing clean and healthy living behavior (CHLB). This study aims to analyze the application of health promotion management of CHLB in the era of the covid-19 pandemic. This research used a sequential explanatory design located at the RSU Royal Prima Medan with a quantitative sample of 111 patient assistants and qualitative research informants. Data were obtained using questionnaires and in-depth interviews. Based on the research results that 63 respondents have bad CHLB. Data were analyzed using chi-square found that knowledge and attitude have the most significant influence on the implementation of CHLB with p = 0.002 of attitude, followed by p = 0.014 of knowledge and p = 0.019 of HHP. The results of multiple logistic regression indicate that HHP is the most dominant variable that can affect CHLB. In contrast, p = 0.002 of attitude, p = 0.014 of knowledge, and followed by p = 0.019 of HHP. This research also ensured the significance of CHLB as a new approach that may contribute to the advancement of knowledge on hospital management in the pandemic situation.
Automatic Toll Payments in Smart Transportation
Authors: Givan Bryan , Lase Mareanus , Rachmat Stanty Aufia , Siahaan Matdio , Deni  , Gustina Dian , Nurlaelah  , Purtiningrum Susi , Putra Arman Syah , Winanti
Published: October 2022

This research has a basis. Research is how to help toll road managers in reducing congestion at toll gates. With this proposed system, it will be able to provide the best system proposals in order to provide the best service to toll road users so that they are not exposed to congestion at toll gates. The method used in this research is by using the literature review method and using a survey, so that field data can be seen if the proposed system is applied to research, with literature review, it can be seen that previous research studies so that this research can be the latest research, and can provide the best result for the toll road manager. This research raises the problem of congestion that often occurs at toll road doors. With this problem, it must be found how the best solution and can provide maximum results to all parties, both from the toll road manager and from the toll road users. This is expected to be maximal and can help all parties. The purpose of this study is how to provide a proposed system and provide the best results to reduce congestion on toll roads, with a survey conducted, 81% of the results of the survey said that the system is the best system that can be applied, and 19% said that the system had not been properly applied to the toll road gate system in Indonesia.
Factors that Influence The Application of Health Protocols in The Pratama Serasi Clinic Medan Helvetia Subdistrict
Authors: Buenita S , Simanjuntak Mafe Robbi , Mahdali Widya Annisahaqmi
Published: October 2022

Covid-19 has become a disease spread pandemic around the world and treatment and prevention is carried out in compliance with government-issued health protocols. However, it doesn’t run optimally because many people don’t comply with health protocols, especially when going to health facilities. The purpose of this study is to find out the factors that affect the application of health protocols in Klinik Pratama Serasi Kec. Medan Helvetia. This type of research is quantitative descriptive design. The population was patients who visited Klinik Pratama Serasi Kec. Medan Helvetia with a sample of 186 selected with slovin formula. Data collection using health protocol behavior questionnaires that have been tested for validity and reliability and analyzed with univariate and bivariate analysis. The result is three factors that have a meaningful relationship with the application of health protocols in Klinik Pratama Serasi Kec. Medan Helvetia namely knowledge (p = 0.022), education level (p = 0.047), and compliance (p = 0.001). It is expected that patients who visit Klinik Pratama Serasi Kec. Medan Helvetia adhere more to health protocols, not only when going to the clinic, but to other public places in order to prevent the transmission of the Covid-19 virus.
Macrozoobenthic Community Structure in the Kemayungan-Linduk Waters, Banten Bay
Authors: Ibrahim A , Sudarso J , Sulistiono
Published: October 2022

The objective of this study was to investigate the macrozoobenthic community structure in Kemayungan-Linduk waters, Banten Bay. This study was conducted for three months from February to April 2021. Van Veen grab was used to gather macrozoobenthic samples in triplicate at six sites. Environmental parameters such as depth, Secchi depth, water temperature, turbidity, pH, dissolved oxygen, and salinity were also measured. According to our findings, Gastropods, Bivalvia, Malacostraca, Polychaeta, Clitellata, Insecta, and Ophiuroidea were found in the Kemayungan-Linduk waters. Macrozoobenthic density varied across time, ranging from 1646 to 5787 individuals/m2, with the maximum density occurring in April 2021. Macrozoobenthic diversity based on the Shannon-Wiener index ranged from 0.34 - 1.69. The Pielou’s evenness index varied from 0.10 - 0.45, Simpson dominance index varied from 0.31 - 0.89. Macrozoobenthic density ranged from 30 - 16883 individuals/m2, and the highest density was at Station 4, based on location. The Shannon-Wiener diversity index varied from 0.28 - 1.96, whereas the evenness and dominance indexes were 0.08 - 0.95 and 0.16 - 0.92, respectively. Based on spatial observations, the macrozoobenthic community in Kemayungan-Linduk waters displayed low to moderate diversity, as well as low to high evenness and dominance.
The Application of Different Probiotics for Prevention of Motile Aeromonas Septicemia Disease on African Catfish (Clarias gariepinus)
Authors: Maulianawati D , Rukisah R , Ramadani D , Irawati H
Published: October 2022

Motile Aeromonas Septicemia has become a problem in aquaculture. This study set out to investigate the usefulness of the probiotic Lactobacillus acidophilus and Staphylococcus lentus on survival rate, growth, and feed conversion efficiency of African Catfish (Clarias gariepinus). In vitro test was carried out to evaluate the effectiveness of probiotic against A. hydrophila and followed by in vivo test. In earlier treatment, Aeromonas hydrophila (final concentration 104 CFU mL−1), L. acidophilus, and S. lentus at a final concentration of 104 CFU mL−1 were added in aquaria every 2 days. there are four of the aquaria with three replicates, one control (without probiotic). In vitro test exposed the inhibition zone of L. acidophilus, S. lentus, and the combination of both bacteria was 11.72±0.55, 13.03±2.99, and 14.66±1.50 mm, respectively. After 21 days of treatment, the addition of the probiotic significantly increased the survival rate (P<0.05) for all conducts compared with controls. In vivo test showed that the application of probiotics in media of cultivation could reduce the number of A. hydrophila, improve the specific growth rate (SGR 6.00 ± 0.05%), and also increase the survival of catfish compared to the positive control. The results indicated that the combination of probiotics L. acidophilus and S. lentus appearances the highest survival (91.11 ± 1.53 %) of all treatments and the ratio of feed conversion was found to be decreased (0.23). This study highlights the combination of L. acidophilus and S. Lentus that could prevent MAS disease on Catfish.
Study Of The Ground Cover Species Important For Agriculture In Peat Swamp Forest Area Tengku Dacing Village
Authors: Mardhiana  , Panjaitan Rosnauli , Diana Rita , Harryati Tati
Published: October 2022

This study aims first to determine the ground cover species that are potentially important for agriculture in the peat swamp forest of Tengku Dacing Village, Second, knowing the benefits and potentials of the ground cover species that are potentially important for agriculture. Third, knowing the distribution of the ground cover species that are potentially important for agriculture in the peat swamp forest of Tengku Dacing Village. The research method uses descriptive quantitative and qualitative descriptive methods. The quantitative descriptive method is carried out by analyzing the data that has been obtained using the data analysis formula from Indriyanto in 2017. While the qualitative description method is carried out by conducting an analysis with plant species identifier experts and literature research to determine the types and potential of the understorey plants that have been successfully recorded. With this research, it is hoped that the community will be able to know more about the important value of each existing understorey, whether it is used as a medicinal plant, ornamental plant, or as a basic material for making handicrafts. The results of this study, concluded that: first, there are 28 species of understorey in the peat forest of Tengku Dacing Village. Second, there are 15 spesies of plants that have the potential as medicinal plants, 6 types of plants that have the potential as ornamental plants and several plants that have the potential as basic materials for handicrafts (mats). Third, the diversity of understorey species in the peat swamp forest of Tengku Dacing Village is not too high. Fourth, the understorey that dominates the peat swamp forest of Tengku Dacing Village is Carex cryptostachys. Fifth, the distribution pattern of plants in the peat swamp forest of Tengku Dacing Village is in groups.
Implementation of Greedy Algorithm for Profit and Cost Analysis of Swallow’s Nest Processing Dirty to Finished Products
Authors: Indra Evta , Angelin  , Aisyah Siti , Turnip Mardi , Sitanggang Delima , Sihombing Oloan
Published: October 2022

Swallow’s nest is made from the saliva of swallows, especially from the genus Collocalia. Swallow’s nest is usually used traditionally to improve health by the community. Swallow’s nest products are difficult to produce, causing the product price to be expensive. This study aims to identify the production costs and benefits of swiftlet nests using the Greedy algorithm by finding solutions for each stage of production. The principle of Greedy’s algorithm is "take what you can get now". There are 6 processes in the production of swiftlet nests, namely sorting raw materials, cleaning, drying, printing, in process control, and packaging. In the sorting and cleaning process, employees in the medium to light nest category are combined. The identification results show that the total costs incurred in the sorting and cleaning process are reduced by 14% and 8%, respectively. The process of drying dense and medium hair nests takes the same time so that it is carried out simultaneously and the required cost is reduced by 11%. The original molding stage and the nest supertype are combined because they have 90% similarity in the production process.
Butterfly (Lepidoptera: Rhopalocera) Preference Host Plant and Food Plant in North Borneo
Authors: Nursia  , Fitriyani  , Sam Nur Fitriana
Published: October 2022

The presence of butterflies in an area has a carrying capacity of habitat, a component of host plants and food crops. This study aims to identify the types of host and food plants in the Research Forest area of the University of Borneo Tarakan and Orchid Gardens. The research was conducted using an exploratory with the descriptive method, which systematically describes the facts that exist through direct observation in the field. Sampling of host plants and food plants was conducted from July to September 2019. The results found five species of plants from 4 families as host plants for butterflies. The family of host consist of Fabaceae, Myrtaceae, Olacaceae, and Dipterocarpaceae. Meanwhile, there are six families of food plants, namely Rubiaceae, Malvaceae, Apocynaceae, Melastomataceae, Cyperaceae, and Asteraceae, which consist of 6 different species including Ixora sp, Hibiscus rosasinensis, Allamanda cathartica, Melastoma sp, Cyperus rotundus, and Ageratum conyzoides.
Implementation LoRaWAN End Node Tracking
Authors: Sagala Albert , Lubis Ramot , Sitanggang Herwin , Sinaga Rondy , Hutapea Suprianto
Published: October 2022

This study is a trial of the LoRaWAN LGT92 End Node connected to the LoRa RAK7243 Gateway. These end nodes and gateways were registered on The Things Network (TTN) server. Therefore, several scenarios were made to test the performance of communication. Firstly, the signal strength received by the gateway was measured, followed by mobile node tracking using one or two gateways. During the test processes, the position of the LGT92 node was successfully sent in real-time to the TTN server and its coordinates were also displayed on the dashboard using Cayenne. The range achieved for RAK7243 is 900 m in NLoS. Furthermore, the position of both nodes was displayed on the map using the Cayenne application. The future work is to build the proposed design in real system scenarios.
Characteristics of Model Growth And Mortality of White Shrimp (Penaeus merguiensis de Man 1888) in The Estuaria of Bengara, Regency Bulungan
Authors: Salim Gazali , Hendrikus  , Indarjo Agus , Prakoso Lukman Yudho , Haryono Muhammad Gandri , Irawan Aris , Ransangan Julian
Published: October 2022

White shrimp is one of the catches of fishermen using fishing gear in the Sekatak Bengara Estuary area, Bulungan Regency which has a fairly high economic value ranging from Rp. 28.000-Rp. 40.000,-. The purpose of this study was to analyze the characteristics of the growth and mortality model of white shrimp (P.merguiensis) in the Sekatak Bengara Estuary, Bulungan Regency. The research method uses descriptive quantitative methods. Sampling of P.merguiensis shrimp used fishing nets with purposive sampling method in the Sekatak Bengara Estuary, Bulungan Regency. The results showed that P.merguiensis shrimp with a total of 2253 samples with 750 male samples with the smallest size 53mm (age 13 days) and the largest size 129mm (aged 62 days), while the female sample was 1503 tails with the smallest size 55mm (age 18 days). and the largest size is 123mm (110 days old) with a sex ratio of 1.0:2.0. The growth model of male and female P.merguiensis shrimp was negative allometry with the male dominant body shape being thin and the female dominant having a fat body shape. The growth model of von Bertalanffy male shrimp has a maximum length of 151.894 mm (451 days old) has a growth speed of 0.03mm/day with a correlation of 64.29% and a female shrimp of 128.01mm (452 days old) has a growth rate of 0.052mm/day with a correlation of 80.07%. The mortality model of male and female shrimp obtained total mortality of 101.17% and 100.9%; catch mortality was 50.75% and 67.81%; natural mortality of 50.41% and 33.09%; exploitation rates of 50.17% and 67.2%, respectively.
The Impact of Supply Chain Information System on The Digital Economics and logistics transportation
Authors: Mufadhol Mufadhol , Warsito Budi , Wibowo Adi , Mustafid Mustafid , Suryono Suryono
Published: October 2022

The COVID-19 pandemic has changed the pattern of human life, one of the impacts of this change is people’s economic activities going digital by utilizing supply chain information systems. The purpose of this study is to examine how much influence supply chain information systems have on the growth of the digital economy of developing countries, in this case Indonesia, along with transportation needs for logistics. This paper uses a systems meta-analysis by conducting a survey and review of several articles related to supply chains, digital economy, and logistics that have been published in reputable international journals. Coupled with 55 respondents, 30 endusers, 10 resellers, market place users and drop shippers, as well as 5 domestic logistics service providers. To test the consistency of the answers to the questions that have been asked, validity and reliability tests were conducted. After being calculated using simple statistics, it was found that the supply chain information system after the COVID-19 pandemic was very influential, although partial to the enormous increase in economic growth towards digital and the growth of logistics services had increased.
Development and Integration of Himawaricast Reception System at Pekayon Ground Station
Authors: Pratiknyo Adi Mahatmanto B. , Sugiyanto  , Indradjad Andy , Hestrio Yohanes Fridolin , Suhermanto  , Gunawan Hidayat , Sunarmodo Wismu , Ramadhan Panji Rachman
Published: October 2022

The vast territory of Indonesia stretches along the equator. Indonesia, which has a dynamic tropical rainy climate, needs fast and accurate weather information for various activities on land, sea, and air. Therefore, it is necessary to have information on the available weather that covers the entire area on an ongoing basis. Weather data information can be obtained quickly from remote sensing satellites. Where the advantage of geostationary satellites has wide enough coverage of the earth’s appearance where weather information can easily be obtained. Since 2015, the Himawari-8 satellite has been used as a weather satellite by the Japan Meteorological Agency (JMA). There are several methods of data distribution, one of which is Himawari Cast that suitable for use by ground stations. Since 2016, the National Institute of Aeronautics and Space of Indonesia (LAPAN) has received Himawari-8 data using the Himawari Cast method via the Pekayon Ground Station. Himawari data sent by the telecommunications satellite JCSAT-2B is carried out every 10 minutes. Therefore, reliable ground station equipment is needed because it works almost all the time. Therefore, a backup reception system was built that functions as a system that is ready if one day the main receiving system fails. This paper contains the design, installation, and integration of devices from a backup system made at Pekayon ground station to receive Himawari data. Not only from the hardware side that was developed but also from the software side that can generate data regarding cloud information from Himawari-8 data.
Analysis of rare vascular plant species in need of protection in wetlands of Republic of Bashkortostan
Authors: Bikbaev I G
Published: October 2022

The work presents a systematic and phytosociological analysis of rare threatened vascular plants of the wetlands in the Republic of Bashkortostan. The work considers the plants listed in the Bern Convention list, Red Data Books of the Republic of Bashkortostan and the Russian Federation, as well as IUCN Red List of Threatened Species. In Bashkortostan, the greatest number of rare mire species is represented by the family Orchidaceae, and the second place belongs to the family Cyperaceae. The communities of low sedge-moss minerotrophic fens of the alliance Caricion davallianae and oligo-minerotrophic mires of the alliance Sphagno-Caricion canescentis are the richest in rare species. Less rich in rare species are mesotrophic paludified forests and shrublands with sedge-moss communities of the alliance Betulion pubescentis and oligotrophic shrub-sphagnum bogs of the alliance Vaccinio uliginosi-Pinion sylvestris. The communities of eutrophic mires dominated by high sedges, shrubs, trees, as well as water communities located within mire complexes have the lowest diversity of rare species.
Application of mineral and organic modifications of peat near the sludge storage facility for uranium immobilization
Authors: Shvartseva O S , Boguslavsky A E , Mashkova D M
Published: October 2022

The identification of methods for uranium immobilization is important for decision-making on remediation of contaminated areas. Here we investigate the degree of uranium binding on peat sorbents chemically modified using humic acids (HA), zero-valent iron (ZVI), and aqueous ferric chloride. The peat was sampled in the territory of the sludge storage of low-radioactive wastes. In the laboratory, the uranium adsorption on natural peat reaches the maximum values of 86% after 8 hours in comparison with the 92% after 30 min on HA modified peat and 88.8% after 2 hours on aqueous ferric chloride modified peat. The improvement of the peat sorption capacity was confirmed within the three months field experiment using HA and ZVI. The results of the sequential extraction procedure confirm the participation of both modifiers in the processes of uranium sorption.