bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reliable and Seamless Communications of Networked IAV in Container Terminal Using UAV Technology
Authors: Bahnes Nacera , Kechar Bouabdellah , Haffaf Hafid 
Published: February 2022

Abstract
Managing container loading and unloading operations at a container terminal using Intelligent Autonomous Vehicle (IAV) is challenging, especially at intersections in the yard, which are often inevitable. For ensuring efficient and accident-free management of these intersections, the IAV must cooperate by exchanging messages. Due to signal obstruction at these intersections, indirect communication is established through an additional relay node to ensure reliable communication. This paper proposes distributed approach using Unmanned Aerial Vehicle (UAV) connectivity to avoid collision and deadlock between IAV at intersections. Due to the obstacles formed by stacked containers blocking the radio transmissions, the proposed algorithm automatically switches the ongoing communication through the UAV to ensure successful communication at intersections. Thus, the idea of introducing UAV as communication relay in a container terminal is an interesting solution that we have adopted in this work. Simulation techniques are used to evaluate our proposal. The obtained results confirm that our UAV-based approach ensures reliable communication and automated intersections management in the yard while further ensuring the safety of IAV traffic.
Occupancy Estimation at Bus Stops Through Wi-Fi Connectivity Assessment – A Study in Guayaquil City
Authors: Cheme Viviana Mero , Martinez Martin Herrera , Durango Rayner , Padilla V. Sanchez 
Published: February 2022

Abstract
Guayaquil is one of the most congested cities on the American continent. Several users cannot access on-time transport service according to the demand requested at bus stops. This work presents a simulation of the Wi-Fi technology to determine the number of users present at a bus stop. The objective is to know an estimation of them in different time intervals throughout the day, which could be useful for several actions, e.g., to set up a better distribution of transportation schedules or to place the bus stops in more demanding sites by users. The methodology included simulation scenarios for user counting at the bus stops. The results depicted that Wi-Fi technology performed suitable even in high-level attenuation scenarios.
Ammonia as Clean Shipping Fuel for the Baltic Sea Region
Authors: Gerlitz Laima , Mildenstrey Eike , Prause Gunnar 
Published: February 2022

Abstract
The international shipping industry transports about 90 per cent of the global trade volume and is responsible for only two per cent of the anthropogenic carbon dioxide emissions. Consequently, the shipping sector is considered as an environmentally friendly transport mode. Nevertheless, global shipping can also improve its environmental footprint. So that in recent years clean shipping initiatives have been placed on the political agenda with the implementation of the Sulphur Emission Control Area (SECA) and Nitrogen Emission Control Area (ECA) regulations and the Global Cap. The next target of the International Maritime Organisation (IMO) in the sequel of the Paris Agreement of climate protection is dedicated to reduction of the Greenhouse Gas (GHG) emissions by up to 50 % until the year 2050.
The paper investigates and discusses the research questions to what extent ammonia can be used in Baltic Sea Region (BSR) to propel merchant vessels and how ammonia can fulfil future demands under technical, economic and infrastructural aspects to become the green fuel for the Baltic Sea Region (BSR) shipping industry. The study benchmarks the properties of ammonia as marine fuel against Marine Gas Oil (MGO) and Liquified Natural Gas (LNG). The research is based on secondary data analysis that is complemented by expert interviews and case studies, and the results are empirically validated by data that were collected during the EU projects “EnviSuM”, “GoLNG”, “CSHIPP” and “Connect2SmallPorts” that took place within the last four years in the BSR.
CFD Study of Behavior of Transition Flow in Distinct Tubes of Miscellaneous Tape Insertions
Authors: Oni Taiwo O. 
Published: February 2022

Application of transition flow can be found in several processes and systems. It has been revealed through findings from various researchers that the values of Reynolds numbers at which transition flow occurs vary. In the current work, investigations were numerically conducted by Fluent on transition of water flow in three assorted plain tubes fitted with miscellaneous tape insertions. They are plain tube with crossed-axes-circle-cut tape insert (C-C tube), plain tube with crossed-axes-triangle-cut tape insert (C-T tube), and plain tube with crossed-axes-ellipse-cut tape insert (C-E tube). The focus of the work is to explore the influence of the tape insertion on commencement and finish of transition flow in the tubes with respect to the Reynolds number of the flow. The Reynolds number (Re) taken into account for the transition flow is 2,150≤Re≤4,650, and the variation of Shear-Stress Transport κ-ω model that deals with transition flow was utilized. The results showed that transition flow starts at Re=2,300 and finishes at Re=4,400 in C-T tube, starts at Re=2,780 and finishes at Re=4,610 in C-C tube, but starts at Re=2,550 and finishes at Re=4,500 in C-E tube. The Nusselt number in C-T tube is 19.3% to 45.6% higher than that in C-C tube, but the Nusselt number in C-T tube is 3.6% to 28.3% more than that in C-E tube. The friction factor in C-T tube is 2.15% to 4.56% higher than that in C-C tube; the friction factor in C-T tube is 0.83% to 3.33% more than that in C-E tube. These results indicate that for the case of the tubes considered in this work, the C-T tube, which is the first one in which transition flow commences and ends, has the highest Nusselt number, but C-C tube, in which transition flow commences and finishes last, has the least Nusselt number. Interestingly, the same phenomenon applies to the friction factor. Doi: 10.28991/HIJ-2022-03-02-02 Full Text: PDF
Ab-initio Study of Structural and Electronic Properties of Perovskite Nanocrystals of the CsSn[Br1−xIx]3 Family
Authors: Nematov D. D. , Kholmurodov Kh. T. , Yuldasheva D.А. , Rakhmonov Kh. R. , Khojakhonov I. T. 
Published: February 2022

In this study, by means of quantum-chemical calculations within the framework of density functional theory, we considered a number of structural and electronic properties of nanocrystals of the CsSn[Br1−xIx]3 (systems CsSnBr3, CsSnBr2I, CsSnBrI2 and CsSnI3) and discussed the effect of iodine concentration on the geometry and electronic properties of these materials. The exchange correlation effects of electrons were taken into account by the LDA, GGA and the modified Becke-Jones exchange correlation potential (mBJ). The results obtained in the framework of the DFT-mBJ and the Wien2k packages are in good agreement with the data from experimental measurements and open up the possibility of accurately predicting a number of fundamental properties of perovskite-like complex structures and the development of new materials. Doi: 10.28991/HIJ-2022-03-02-03 Full Text: PDF
An Integrated Approach of Multi-Criteria Decision Making to Determine the Most Habitable Planet
Authors: Gunaydin Gizem , Duvan Gamze , Ozceylan Eren 
Published: February 2022

Every planet in the universe has its own characteristics. These features make the planets different among themselves. For this reason, all the different properties of the planets must be evaluated at the same time when determining habitable planets. This situation requires a multi-criteria decision making (MCDM) approach. In this study, a list of habitable planets (nine planets and the Moon) has been considered. Seventeen different criteria such as mass, gravity, diameter, density, escape velocity, rotation time, day of length, distance from the sun, perihelion, aphelion, orbital period, orbital velocity, orbital inclination, orbital eccentricity, obliquity to orbit, mean temperature, and number of satellites are taken into account. The weights of criteria are determined with DEMATEL (The Decision Making Trial and Evaluation Laboratory) by analyzing the interactions among criteria. Orbital inclination is the criterion with the highest weight, and the criterion with the lowest weight is the number of satellites. After weighting the criteria with DEMATEL, VIKOR (VIseKriterijumska Optimizacija I Kompromisno Resenje) and TOPSIS (Technique for Order Preference to Similarity to Ideal Solution) approaches are used to rank the planets. According to the TOPSIS, Earth is ranked first, Venus ranked second and Mercury ranked third in the order of the most habitable planets. According to the VIKOR method, Earth is ranked first, Mars is ranked second, and Mercury is ranked third in the order of the most habitable planets. Finally, the same calculations are considered with equal weights and the results are discussed. Doi: 10.28991/HIJ-2022-03-02-04 Full Text: PDF
O comportamento do termo informação na ciência da informação
Authors: Souza Marcos de , Almeida Fernanda Gomes 
Published: February 2022

A informação enquanto conjunto de dados que os seres humanos dão sentido para interpretar fatos, por meio de um sistema de signos entre o transmissor e receptor, foi essencial para o desenvolvimento e sobrevivência da Ciência. Enquanto elemento que constitui a tríade dado, informação e conhecimento, também estudado na Ciência da Informação, o termo informação apresenta características generalistas quando analisado num contexto isolado. Dentre os objetivos, a pesquisa buscou: 1) identificar e discutir o comportamento do termo informação em pesquisas científicas da área de Ciência da Informação e; 2) realizar o mapeamento científico dos termos compostos formados por n-grama gerados a partir do termo raiz. A pesquisa empírica foi realizada por meio da construção de algoritmos utilizando a linguagem de programação Python que permitiu extrair a frequência de termos de 2.448 documentos. O termo informação, na sua forma raiz, tem apresentado comportamento contínuo e regular ao longo do período analisado, entretanto, os termos de composição como, por exemplo, “informação_tecnologia”, “recuperação_informação” e “fonte_informação” somados, alcançam 41,98% da frequência do termo informação, apresentando maior especificidade de conceitos junto ao domínio da linguagem da Ciência da Informação. O real comportamento do termo informação se apresenta de maneira representativa e com maior especificidade através dos termos de composição, formados a partir do termo raiz. A interdisciplinaridade da Ciência da Informação contribuiu para o quantitativo e diversidade dos termos de composição extraídos do corpus.
PENERAPAN METODE WAVELET THRESHOLDING UNTUK MENGAPROKSIMASI FUNGSI NONLINIER
Authors: Janariah Muhammad Luthfie , Bahri Syamsul , Fitriyani Nurul 
Published: February 2022

The wavelet thresholding method is an approximation method by reducing noise, which is known as the denoising process. This denoising process will remove noise while closed the important information in the data. In this research, the wavelet thresholding method is used to approximate the nonlinear function. The data used for the simulation is a representation of several functions that represent several events that often occur in the real world, which consists of the types of functions Blocks, Bumps, Doppler, and HeaviSine. Based on simulation results based on the indicator value of the Cross-Validation (CV), the best approximation of the nonlinear function using the wavelet thresholding method for the four simulation cases are: (i) the Blocks function is given by Haar wavelet with a soft of thresholding function and the 10-th resolution level ; (ii) the Doppler function is given on the 2-nd order of Symlets wavelet with a soft of thresholding function and the 10-th resolution level; (iii) the Bumps function is given on the 6-th order of Daubechies wavelet with a soft of thresholding function and the 10-th resolution level; and (iv) the HeaviSine function is given by the 3-rd order of Coiflet wavelet with a soft of thresholding function and the 7-th resolution level.
SINTESIS DAN KARAKTERISASI KARBON AKTIF DARI PREKURSOR BATUBARA
Authors: Septiana Atut Reni , Teluma Yosef Christian Riki , Rifani Agus 
Published: February 2022

In this work, coal derived activated carbon has been synthesized successfully. The activated carbon was prepared by soaking coal powder in KOH solution and continued by activation at varied temperature, i.e. 400, 500, and 600˚C. The performance of the activated carbon was determined by moisture content, iodine adsorption, and methylene blue adsorption. The lowest moisture content was achieved by activated carbon which was activated at 400˚C, namely 3.77%, while the moisture content for activation temperature at 500 and 600˚C were 5.3 and 7.74% respectively. Moreover, the adsorption of iodine and methylene blue increased by the increase of the activation temperature due to high pore surfaces of activated carbon.
THE MEASUREMENT OF ENVIRONMENTAL RADIATION EXPOSURE AROUND THE LINAC RADIOTHERAPY BUNKER
Authors: Kurniasari Septiana , Hentihu Fatimah K , Anto Alfian K , Prasetyo Henry 
Published: February 2022

Radiotherapy is cancer therapy using radiation. One of the tools used for radiotherapy is the Linac. Using Linac also can have a detrimental effect on radiation workers, patients, and the public. The reaction can cause activation around the room to become radioactive. Therefore, radiation protection is needed. This research aimed to measure environmental radiation exposure as a radiation protection effort around the Linac bunker. This research uses a quantitative method by collecting data directly on the area around the Linac bunker, with a distance of ± 30 cm from the bunker wall, using the STEP OD-02 Detector. The average Linac operation is 2000 hours/year, while the safe dose limit used is 1/2 dose Limit from Nuclear Power Monitoring Agency. Based on measurements of environmental radiation exposure, there are eight areas classified as safe and four other regions experiencing radiation leakage, including Doors with a radiation exposure difference of 0.078 Sv/hour; West Field (0.074 Sv/hour); TPS Room (0.302 Sv/hour); and Meeting Rooms (0.199 Sv/hour), but still within the safe limit of radiation dose. The environmental radiation exposure around the Linac Radiotherapy bunker is safe.
Peningkatan Pemahaman Masyarakat terhadap Bahaya dan Dampak Bencana Alam Serta Penanggulangannya
Authors: Taufiq Al Ashfahani Qodrifuddin  , Jumiati  , Kartini  , Maya Zulva  , Mihratun  , Rakyal Aini  , Rina Kumala Utami  , Siska febri Cahyani  , Uli Aprialis  , Baiq Nilam Safitri  , Widiami Sayidah  , Ahmad Raksun  
Published: February 2022

Indonesia sebagai negara kepulauan, memiliki karakteristik geografis beragam baik secara tatanan tektonik, dinamika meteorologis, maupun klimatologis yang rawan terhadap bencana alam. Salah satu penyebabnya adalah karena wilayah Indonesia dilalui oleh dua jalur gunung berapi dunia, sirkum pasifik (Pacific ring of fire) dan sirkum Mediterania yang melintasi wilayah Pulau Sumatera, Jawa, Nusa Tenggara, hingga Sulawesi Utara. Bencana yang mungkin terjadi sangatlah beragam yakni gempa bumi, tsunami dan gunung meletus. Selain itu karena banyaknya daerah pegunungan dan pemukiman yang padat penduduk juga dapat menyebabkan timbulnya bencana alam banjir dan tanah longsor. Untuk mengantisipasi kepanikan dan ketidak siagaan masyarakat maka dilakukan sosialisasi bersama mahasiswa KKN dengan BPBD (Badan Penanggulangan Bencana Daerah), guna mengedukasi masyarakat tentang bencana alam serta berbagai hal yang perlu dilakukan sebagai pembelajaran dan perkenalan awal pada mitigasi bencana. Kegiatan ini diharapkan dapat menambah pengetahuan dan wawasan masyarakat di bidang bencana dan mengetahui tindakan yang perlu dilakukan saat terjadi bencana alam serta evakuasi mayarakat untuk meniadakan atau mengurangi dampak bencana.
UNJUK KERJA REKAYASA ALAT HUJAN BUATAN SEBAGAI TOLOK UKUR PEMBERIAN AIR IRIGASI TANAMAN PADI
Authors: Widata Sri , Pamungkas Djoko Heru 
Published: February 2022

Self-supporting food, especially rice which has become a problem for a long time in Indonesia should be overcome gradually. Specifically, this research aimed to support self-supporting food by growing plants, especially rice in dry land by using water effectively and efficiently. The use of water effectively and efficiently here means providing water that is not excessively, only in the root zone of the plant. It is in line with the objective of this re-search that is to design a prototype of device that can be used to create artificial rain to irrigate the surface of land and it will be stopped if the water has reached the root zone of the rice plants. The longer the rain given, the deeper the water absorption will be. The research results showed that the longer the rain is given, the deeper the water absorption will be. The result of research with the length of rain for 120 minutes, it needed the average volume of water of 331.83 liters and resulted in the thickness of absorption as follows: Treatment T0 (uncultivated land) the average of absorption was 7.3 cm, T1 (the land was cultivated by hoeing) the average of absorption was 18.09 cm and T2 (the land was cultivated by hoeing and loosening) the average of absorption was 21.3 cm. In details, the research data can be seen in table 1 and 2. The regression analysis of the volume of water and the thickness of water absorption is shown below: Â Treatment T0Â Y = 2.14 + 0.018 X; Treatment T1Â Y = 4.64 + 0.042 X; Treatment T2Â Y = 6.09 â€“ 0.047 X Furthermore, the result of hypothesis testing showed that there is a real difference in the three treatments. It means that with the same need of water volume, there is a significant difference in the thickness of water absorption as shown in the three treatments.
PELUANG EKONOMI TANAMAN CIPLUKAN (Physalis angulata L) SEBAGAI ABATE ALAMI
Authors: Ratri Wahyu Setya , Darini M. Th. 
Published: February 2022

Dengue shock system (DSS) is disease that is caused by virus and attacks the thrombosis of human being that may break the blood vessel and may cause death. This disease is caused by mosquito named Aedes aegypty whose cycle is five years and its proliferation is very quicklyÂ Â Â Â (7 days). Preventive efforts that have been done so far is by relying on chemical medicines by fogging and the use of Abate in which it may cause dependency on it and residue of mosquitoes. The content of Abate that kills mosquito larva is themephose, that is a compound organic phosphate which is the same as papain from papaya (Carica papaya L). TheÂ content of this compound kills the growth of mosquito larva by slowing down the rate of metabolism in their bodies. The content of compound in Ciplukan (Physalis angulata L) plants is chosen because it does not contain residue on the environments and, on the contrary, if is unintentionally drunk by people will minimize the effect of suffering from diabetes. This research used Ciplukan (Physalis angulata L) plant extract, particularly from its leaves and stems because its content of alkaloid is more than the content of themephose in Abate; that is 4.06 ppm and 1,56 ppm per 100 gram of the plant (Abate 1 ppm per 100 gram), so in term of activity it is proven that by using the leave extract can kill the mosquito larva in shorter time, less than 24 hours with concentration 100%. Meanwhile, in the stem solution, the percentage of the death of larva is almost the same as the papaya solution, in which it takes less than 78 hours with concentration 100%. It was supported by the result of test using CRD from which it was known that leave extract has larger coefficient than stem extract. It means that the capability of the leave extract (deviation standard 12.43s) is larger thanÂ the stem extract (deviation standard 7.2s). Compared to the use of Abate, the average death of mosquito larva by using leave extract is 26.9 larva per day and compared to the use of stem extract, the average death of mosquito larva is 3.93 larva per day. Economically, we can save Rp 11.350,00/pack if we take Ciplukan leaves and stem to be extracted in which it consists of 10 grams ofÂ Ciplukan leave and stem extract. If the extract or natural Abate is sold, it will cost Rp 650,00/pack; it is more economical than the price of chemical Abate in which price Rp 12.000,00/pack. From the calculation, it is so profitable if we run business on it. We can get back our capital for one year, in which the break event point (BEP) can be reached after selling 162 units which cost Rp 162.000,00 and the profit is more or less Rp 283.000,00/ each production
PENGARUH FIKSATOR PADA EKSTRAK DAUN MANGGA DALAM PEWARNAAN TEKSTIL BATIK DITINJAU DARI KETAHANAN LUNTUR WARNA TERHADAP KERINGAT
Authors: Kartikasari Enggar , Susiati Yasmi Teni 
Published: February 2022

In general, this research aims to find out the influence of fixer on mango leave extract in dyeing batik cloth on the basis of its color fading tenacity from sweat. The hypotheses of this research predict that: (1)Â there is a positive influence of lime fixer on mango leave extract on the basis of its color tenacity from sweat, (2) there a positive influence of lotus fixer on mango leave extract on the basis of its color tenacity from sweat, and (3) there is a difference between lime and lotus fixer on the basis on their color tenacity from sweat. This research was conducted in the laboratory of Family Welfare Education Department of the Teachers Training and Education Faculty of Sarjanawiyata Tamansiswa University. The research populationÂ involved batik painting technique, mango leave extract, and lime and lotus fixers. The research sample involved batik cloth, natural dye from mango leave extract, lime and lotus fixer with two treatments; they are the first fixation before dyeing and the last fixation that was done after dyeing. The research data was collected through experiment. The research results found that there is a positive and significant influence in changing and fading color. Visually, the results of batik dyeing show differences in color; in the treatment with lime fixation, in the first dyeing process, the color was pale yellow, while in the last treatment with lime fixation, the color tended to change to yellowish brown. In the treatment withÂ lotus fixation, in the firstÂ dyeing process, the color was greenish brown, while in the last one withÂ lotus fixation,Â the color changed to greenish dark brown, and the dyeing process without any fixation (control) resulted in yellow color. There is a difference between lotus and lime fixers in the two treatments on the basis of color tenacity from sweat. Therefore, is suggested that batik craftsmen use natural dyes, especially mango leave extract, while for batik lovers, it is suggested that they prefer batik with natural dyes
VISUALISASI TETESAN AIR MENGGUNAKAN LATTICE BOLTZMANN
Authors: Hadinegoro Arifiyanto 
Published: February 2022

Â Water is the important element in of live, every day met with the water, Water is a chemical element that is easily deformed, many factors influence began from nature of the water itself until gravity ,the laws of physics is also present in water droplets phenomenon One such the law of force. the unique nature the water is fairly difficult for computer engineering. However With the development of computer technology now can make a visualization that is similar to the events nature. like this techniques has been apply in making movies and also games, some are used for visual effects that could not be created a real. In this study, authors try to visualize the water droplets with a fluid with one method LatticeBoltzmann fairly simple and powerful in accuracy. Visualization is made a water droplet falling on a cross-section due to gravity at work.