bluuebunny/crossref_metadata_2025_split huggingface dataset:
The mechanical property of different morphology Ti-Ni solder in brazing of BN ceramic and stainless steel
Authors: Zhao Yuhang , Fan Ruicheng , Gao Ying , Li Yifan , Wang Rui , Zhang Yunfeng 
Published: June 2022

Abstract
BN ceramic and stainless steel metal had been connected by vacuum brazing technology. The surface morphology and the micro-structure of solder were observed by optical microscope and scanning electron microscope. The mechanical property of solder was tested by the experiment. The experimental results show that: titanium powder/ Ni powder alloy solder can not form a valid connection due to osteoporosis and porous surface after high temperature heating. Ti powder /Ni foil solder can produce certain effects of connection, but BN ceramic occurs exfoliation in the process of cooling. Because of the affection of impurity elements, eutectic melting temperature of Ti-Ni based solder decreases, and the multiple solder alloy has formed with high density.
Research on the adsorption of RhB on CTMAB modified zeolite: adsorption kinetics, isotherm and thermodynamics studies
Authors: Ma Hongfei , Li Wei , Li Zhuqing , Li Judi , Han Qiuju 
Published: June 2022

Abstract
Cetyltrimethylammonium bromide (CTMAB) modified zeolite was used as the adsorbent, the adsorption behavior of simulated rhodamine B (RhB) dye wastewater was studied. The effects of adsorbent dosage and pH on RhB adsorption by the modified zeolite were investigated. The results show that the increase of the dosage of modified zeolite can improve the removal rate of RhB. The change of pH has a certain influence on the adsorption effect of RhB. The pseudo-second order kinetic model can accurately describe the adsorption kinetics. The study of adsorption equilibrium shows that Freundlich model can better fit the adsorption process than Langmuir model, and the maximum adsorption capacity was 15.97mg/g (303k). The thermodynamic calculation results show that the adsorption of RhB on cetyltrimethylammonium bromide (CTMAB) modified zeolite was an endothermic process, and the increase of the temperature was conducive to the reaction.
Investigation of Flow Characteristics of Flow Passage Components in Francis Turbine under No-load and 50% Load operating conditions
Authors: Li Hongxiang , Xu Liangyu , Zhao Feng , Zhang Fan , Deng Yaxin , Li Haoyu , Cheng Yongguang , Zheng Yuan , Kan Kan 
Published: June 2022

Abstract
Due to the varying demand of power grid for the electric supply of hydraulic power stations, the units are often under low-load operating condition and no-load standby state, causing a significant flow instability in hydraulic generator units. To further investigate the inside flow characteristics of hydraulic turbines under such operating conditions. In this study, a CFD (computational fluid dynamics) numerical simulation with applying RNG (Renorm alization Group) k-ε turbulence model is performed to study the inside flow characteristics of each flow passage components of a Francis turbine under no-load and 50% load conditions. The results indicate that under the two operating conditions, the flow distribution inside and outside the draft tube pier is significantly nonuniform. Simultaneously, the large-scale vortex in the runner area caused by the high-speed flow in the vane-free area with small opening and the nonuniform flow velocity distribution in the straight cone section of the draft tube are the main reasons for the increase of hydraulic loss and the decrease of efficiency.
Fire ant rafts elongate under fluid flows
Authors: Ko Hungtang , Yu Ting-Ying , Hu David L 
Published: June 2022

Abstract
Fire ants survive flash floods by linking their bodies together to build waterproof rafts. Most studies of fire ant rafts consider static water conditions, but here, we consider the influence of flow. In particular, when floating on shallow water, the raft can run aground on vegetation, generating stresses in the raft as the water continues to flow around it. In this combined experimental and numerical study, we film the 10 h response of a fire ant raft caught on an anchor and subjected to water flows of 6 cm s−1. In this situation, ant rafts elongate from circular to more streamlined shapes, doubling in aspect ratio before eventually contracting back into smaller circular shapes as they enter dormancy. Ants in upstream regions of the raft exhibit less exploration activity than those downstream, suggesting that ants migrate to areas of lower fluid stress. While the raft is rough, hydrophobic, and heterogeneous in height, we may gain some insight by performing both fluid-structure interaction and agent based simulations on smooth rafts. Elongation to the degree observed is associated with a 48% drag reduction. Moreover, a purely elastic raft does not elongate, but conversely increases its bluff body cross-sectional area. We conclude that ant raftsmust reconfigure to generate the elongated shape observed. This work may provide insights into designing intelligent robotic swarms that can adapt to fluid flows.
Microstructure, mechanical strength, chemical resistance, and antibacterial behavior of Ti–5Cu–x%Nb biomedical alloy
Authors: Pandey Anurag Kumar , Gautam R K , Behera C K 
Published: June 2022

Abstract
Titanium-based biomedical alloys are susceptible as they are used as a substitute for human bone. In this study, titanium alloy, Ti–5Cu–x%Nb (x = 0, 5, 10, 15) (%wt) was developed by powder metallurgy route. The effect of alloying niobium with Ti–5Cu alloy and its effect on the microstructure, mechanical strength, corrosion resistance, and antibacterial properties have been evaluated. The results show that the sintered alloy has both α-Ti and Ti2Cu phases. With increasing niobium content in the alloy, β-Ti was also detected. Additionally, it was found that the micro-hardness and compressive strength of the studied alloy was better than commercially pure titanium (cpTi), while the Young’s modulus was lower than cpTi. These properties are highly favorable for using this alloy to replicate the human cortical bone. The alloy was also tested for anticorrosive property in Ringer’s solution. The antibacterial activity was also examined for Staphylococcus aureus and Escherichia coli bacteria. The alloy showed promising anticorrosive and antibacterial ability.
Climate policy for a net-zero future: ten recommendations for Direct Air Capture
Authors: Sovacool Benjamin K , Baum Chad M , Low Sean , Roberts Cameron , Steinhauser Jan 
Published: June 2022

Abstract
Direct Air Capture with Carbon Storage (DACCS) technologies represent one of the most significant potential tools for tackling climate change by making net-zero and net-negative emissions achievable, as deemed necessary in reports from the Intergovernmental Panel on Climate Change and the European Green Deal. We draw from a novel and original dataset of expert interviews (N = 125) to distil ten recommendations for future DACCS policy. After providing a literature review on DACCS and explaining our methods of data collection, we present these recommendations as follows: (a) follow governance principles that ensure ‘negative’ emissions; (b) prioritize long-term carbon storage; (c) appreciate and incentivize scale; (d) co-develop with capture, transport, and storage; (e) phase in a carbon price; (f) couple with renewables; (g) harness hub deployment; (h) maintain separate targets; (i) embrace certification and compliance; and (j) recognize social acceptance. All ten recommendations are important, and all speak to the urgency and necessity of better managing and shaping the potentially impending DACCS transition.
On Schrödinger operators with δ′-potentials supported on star graphs
Authors: Pankrashkin Konstantin , Vogel Marco 
Published: June 2022

Abstract
The spectral properties of two-dimensional Schrödinger operators with δ′-potentials supported on star graphs are discussed. We describe the essential spectrum and give a complete description of situations in which the discrete spectrum is non-trivial but finite. A more detailed study is presented for the case of a star graph with two branches, in particular, the small angle asymptotics for the eigenvalues is obtained.
Millimeter-wave gas spectroscopy for breath analysis of COPD patients in comparison to GC-MS
Authors: Rothbart Nick , Stanley Victoria , Koczulla Rembert , Jarosch Inga , Holz Olaf , Schmalz Klaus , Hübers Heinz-Wilhelm 
Published: June 2022

Abstract
The analysis of human breath is a very active area of research, driven by the vision of a fast, easy, and non-invasive tool for medical diagnoses at the point of care. Millimeter-wave gas spectroscopy (MMWGS) is a novel, well-suited technique for this application as it provides high sensitivity, specificity and selectivity. Most of all, it offers the perspective of compact low-cost systems to be used in doctors’ offices or hospitals. In this work, we demonstrate the analysis of breath samples acquired in a medical environment using MMWGS and evaluate validity, reliability, as well as limitations and perspectives of the method. To this end, we investigated 28 duplicate samples from chronic obstructive lung disease patients and compared the results to gas chromatography-mass spectrometry (GC-MS). The quantification of the data was conducted using a calibration-free fit model, which describes the data precisely and delivers absolute quantities. For ethanol, acetone, and acetonitrile, the results agree well with the GC-MS measurements and are as reliable as GC-MS. The duplicate samples deviate from the mean values by only 6% to 18%. Detection limits of MMWGS depend strongly on the molecular species. For example, acetonitrile can be traced down to 1.8 × 10−12 mol by the MMWGS system, which is comparable to the GC-MS system. We observed correlations of abundances between formaldehyde and acetaldehyde as well as between acetonitrile and acetaldehyde, which demonstrates the potential of MMWGS for breath research.
Plant Success Rate in Program Forest and Land Rehabilitation in Unity Batutegi Forest Management
Authors: Widodo L M , Safe’i R , Winarno G D , Yuwono S B 
Published: June 2022

Abstract
Forest and Land Rehabilitation is one of the right solutions to overcome the problem of critical land. Efforts to overcome critical land are difficult to obtain in a short time to return the situation to its original state, but efforts are being made by the government to overcome the existence of critical land and the expansion of critical land, including through land conservation and reforestation. This study aim to determine the success of plants in a forest and land rehabilitation program in the village of Datar Lebuay in the Air Naningan district of Tanggamus regency. The study was carried out in June 2021. Field data collection was carried out by making plots using the Systematic Sampling with Random Start method, namely the first plot was made randomly and the next plots were made systematically. Sampling Intensity (IS) is 5%. The results showed that the success rate of RHL activities with a percentage of life was 79.74% which was classified as successful. Factors that are thought to influence the low success rate of plants are the condition of the planted seeds that are already in a damaged state and the planting season is not right.
Design and Build Remote Watering System Based on Internet of Things (IoT) (Case Study Of Yogyakarta Code Tourism Park)
Authors: Haryanto E , Fitriastuti F , Setiyorini A , Haryanto E M O N , Lukmanfiandy S 
Published: June 2022

Abstract
The combination of IoT (Internet of Things) technology and solar cell technology can be used to ease human work in everyday life. This research will design and build an Internet of Things (IoT)-based automatic plant sprinkler system by utilizing solar cells as electrical energy. The implementation of this system is carried out at the Code Tourism Park in Cokrodiningratan Village, Jetis District, Yogyakarta City. This research was conducted using the waterfall method with systematic stages. Solar panels have succeeded in producing AC electricity with a voltage of 220V so that it can be used to supply electricity to IoT device controllers. The watering mode consists of an automatic mode with a schedule that can be set from a web-based IoT platform and a remote watering mode via the internet. Both watering modes worked well and successfully watered the plants at the study site. For watering a garden with an area of 197.2 m2, the water consumption required per minute is approximately 20 liters. The coverage of watering plants in the Code Tourism Park is 197.2 m2. At the watering location, 15 sprinkler points are installed, so 1 sprinkler point can cover an area of approximately 13.15 m2.
Distribution Mapping of Cadmium on Water and Soil in Rice Fields Around The Industrial Area of Sidoarjo Regency
Authors: Fitrianah L , Yahya M , Noer Hamidah L , Rosyidah E , Rahmayanti A , Octavia L , Widiyanti A , Tamyiz M 
Published: June 2022

AbstractThe development of industrial estates in the western part of Sidoarjo Regency include Taman District, Krian District, Balongbendo District, and Tarik District have a major influence on population growth. The existence of the rice fields around the industry indirectly affects the quality of the environment due to industrial activities. The purpose of this research is to identify the spatial distribution of Cadmium heavy metal content in the water in rice fields around the industrial area of Sidoarjo Regency and to identify the spatial distribution it. The parameters taken are cadmium content in soil and water samples in the rice fields. The method used in the study was a survey and laboratory, mapping used the kriging method. The result of the research showed The highest cadmium content is in the rice fields of the Taman sub-district. cadmium content in water is 1.90 ppm while in the soil is 2.43 ppm. The quality level at the four locations was declared to exceed the environmental quality standard. The distribution map showed the area of the Taman sub-district is the highest compared to other sub-districts.
Effectiveness of the Prohibition of Farming Land Splitting Policy (Study on Land Sale and Purchase)
Authors: Wibawanti E S , Murjiyanto R , Anggraeni R 
Published: June 2022

Abstract
This study aimed to determine whether prohibiting the division of agricultural land into too small (less than 2 Ha) parts is still practical and relevant to society’s current situation. The literature used in this study was supported by data from Land Deed Making Officials (PPAT). According to the results, the policy is no longer effective in limiting the minimum agricultural land ownership and preventing agricultural land splitting. This policy is also no longer relevant because: first, the common area of agricultural land owned by farmers is less than 05 ha; second, many residents are forced to sell their agricultural land; and third, the prohibition encourages agricultural landowners to transfer land functions. Therefore, it is time for the government to reevaluate the minimum land ownership policy and the prohibition on breaking up agricultural land, considering the conditions and developments of community needs and the existing land area.
Environmental Licensing After the Job Creation Act in the Perspective of a Decentralized Unitary State
Authors: Iskatrinah  , Periani Aniek , Hariadi Wahyu , Ningrum Esti 
Published: June 2022

Abstract
This research is motivated by the existence of one of the laws that are affected by Law Number 11 of 2020 concerning Job Creation, namely Law Number 32 of 2009 concerning Environmental Protection and Management, which is related to changes in the concept of environmental licensing, which creates differences There is a perception among the public that there are contradictory objectives in the two laws, that goals that are oriented towards attracting investment and employment have the potential to ignore sustainable environmental conservation. Changes in the concept of environmental licensing into environmental approvals in the work copyright law which then gives more authority to the Central Government regarding the formation of a Feasibility Test Team formed by the Feasibility Testing Agency of the Central Government, and the types of activities and businesses are also determined by the Central Government, so there are efforts to reduce the authority provincial and district/city areas, this is not in accordance with the implementation of decentralization on the principle of regional autonomy mandated by the constitution. This study aims to restore the function of environmental licensing as a controlling instrument in environmental activities/businesses that are attached to the central, provincial and district/city governments, using a qualitative normative juridical method with a library research approach.
Emulsion Polymers of Carboxymethyl Cellulose and Methyl Methacrylate with Tetrabutylammonium Hydroxide Surfactant as Soil Stabilizer
Authors: Abidin A Z , Nuriman R B E T , Pradipto N A , Putra R P 
Published: June 2022

Abstract
Carboxymethyl cellulose (CMC)-based emulsion polymers stabilized with surfactants are of great importance for designing effective soil stabilizing agents that can efficiently bind soil particles. Grafting of CMC with other monomers is considered a promising alternative to enhance the binding capability of polymer with soil particles that can improve the mechanical properties of soil. In this work, CMC-methyl methacrylate (CMC-MMA) emulsion polymers were synthesized using various MMA to CMC weight ratios. Tetrabutylammonium hydroxide was employed as a cationic surfactant to control the sorption and diffusion of water in the emulsions. The materials were further investigated for their compressive strengths using dry and wet procedures by mixing them with laterite soil. The results showed that the materials were obtained in high monomer-to-polymer conversion using MMA to CMC weight ratios of 6.67 - 8.89. Characterization using Fourier transform infrared verified the formation of MMA-CMC-O-(MMA)
n
. The viscosity of the emulsion polymers was in the range of 3.52-8.61 cP. Overall, the rise in the number of cross-linked MMA and CMC monomers resulted in the enhanced compressive strength of the soil due to increased Van der Waals forces and hydrogen bonds between the polymer and soil particles.
Application of cytochrome oxidase subunit 1 partial gene for species validation of Macrobrachium sintangense from Lake Lido, West Java
Authors: Hakim Agus Alim , Sidabutar Yessi Natalina , Mashar Ali , Zairion  , Imran Zulhamsyah , Wardiatno Yusli 
Published: June 2022

Abstract
Lake Lido is one of the habitats for Sunda river prawn (Macrobrachium sintangense), but the species was reported not to be found in December 2015-May 2017. This prawn has an economic value both alive for consumption and dead for bait. Shrimp identified morphologically as M. sintangense required reinforcement using molecular techniques for species certainty. This study aimed to validate Sunda river prawn (Macrobrachium sintangense) based on a molecular approach using cytochrome oxidase subunit 1 (COI) partial gene markers. Species certainty is important as basic information in management. The specimens (n=15) were obtained from Lido Lake and transported to the laboratory for genetic analysis. The analysis includes DNA extraction, polymerase chain reaction (PCR), electrophoresis, and sequencing. Three samples were successfully aligned using MEGA X software. Based on BLASTn in NCBI, the sequences have high similarity with Macrobrachium sp. sequence by 95%. However, nucleotide bases of M. sintangense were found in a database with access code MF622027.1, but it did not match with the samples. Phylogeny analysis showed the different clade positions with M. sintangense database. The prawn samples have been identified morphologically as M. sintangense but have not been validated as the same species by COI partial gene markers. So, it is necessary to validate using other gene markers to obtain species certainty for management.
Temporal variation in abundance of bully sleepers (Pisces: Eleotridae) larvae and juveniles in Cisolok Estuary, Palabuhanratu Bay, Indonesia
Authors: Prabowo T , Simanjuntak C P H , Affandi R , Baihaqi F , Annida S B , Ervinia A , Budiman M S 
Published: June 2022

Abstract
Larvae and juveniles of bully sleepers are the primary targets for the local community surrounding Cisolok River, and this traditional fishing activity is called nyalawean. The present study aims to uncover fish larval diversity and recruitment of bully sleepers in the Cisolok river estuary. Fish sampling using a lift net was conveyed monthly from December 2020 to February 2021. Fish specimens were identified to the lowest taxon through a morphological approach and DNA Barcoding. Catch per unit effort measured the abundance of fish larvae and juveniles (CPUE, Ind.h−1). Only one species was found during the study period, namely Bunaka gyrinoides. A total of 7,353 larvae and juveniles of B. gyrinoides were captured, consisting of flexion (45 individuals; 4-5.9 mm BL), postflexion (6,887; 6-11 mm BL), and early juvenile (441; 11.1-14.8 mm BL). Postflexion larvae were the most abundant specimens, contributing 88.4-95.5%; 96-81.1%, 94.2-97.8% to the total catches in December, January, and February. Larvae and juveniles were more abundant during daylight (671-1591 Ind.h-1) rather than nighttime (147-567 Ind.h-1). These findings indicate that bully sleepers recruit and migrate upstream into the freshwater area of the Cisolok River during the day and nighttime synchronized with the tidal fluxes.
Antibacterial activity of Nephrolepis biserrata extract against Aeromonas hydrophila and Vibrio parahaemolyticus
Authors: Maulianawati D , Suharni S 
Published: June 2022

Abstract
Fish farming has become a significant sector in producing animal protein. However, a disease caused by bacteria such as Aeromonas hydrophila and Vibrio parahaemolyticus has become obstacle factors in these farming activities. Among the various procedures for preventing bacterial attacks, the use of natural ingredients deserves to be considered. This study aimed to test the ability of gray nail extract (Nephrolepis biserrata) in inhibiting the growth of A. hydrophila and V. parahaemolyticus in vitro. N. biserrata were extracted using methanol (EPM) and chloroform (EPC). EPM and EPC were then challenged with A. hydrophila and V. parahaemolyticus bacteria to determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The test results showed that an inhibition zone of EPM against A. hydrophila and V. parahaemolyticus were 8.2 and 8.3 mm, respectively. EPC has been unable to inhibit the activity of both bacteria, whereas EPM could. The MIC value for both bacteria was 50 mg/mL, and MIB concentration was more than 50 mg/mL. The results of this study indicate that the N. biserrata extract could inhibit bacteria.