bluuebunny/crossref_metadata_2025_split huggingface dataset:
Characteristics analysis of heat and mass transport in catalytic reaction layers of thermally integrated reformers
Authors: Chen Junjie 
Published: January 2023

In conventional fuel cells, a predominantly diffusive heat and mass
transport is established in the diffusion layer. However, conventional
fuel cells cannot ensure a heat and mass transport from the porous
diffusion layer to the catalytic reaction layer that is sufficiently
uniform for this purpose. The present study aims to provide a
methodology for determining the characteristics of heat and mass
transport in catalytic reaction layers. Numerical simulations are
performed using computational fluid dynamics to better understand the
characteristics of heat and mass transport in catalytic reaction layers
of thermally integrated reformers. The present study aims to provide a
fundamental understanding of the heat and mass transport in catalytic
reaction layers of thermally integrated reformers. Particular emphasis
is placed upon the dimensionless quantities involved in thermally
integrated reformer with different catalytic reaction layer structures.
The results indicate that a vapor-liquid equilibrium exists when the
escape tendency of the specie from liquid to a vapor phase is exactly
balanced with the escape phase at the same temperature and pressure. It
may be beneficial to utilize the thermodynamic work potential provided
by the transfer of heat to drive the separation process in the desired
direction. If a chamber partition operates below its maximum heat
transfer flux capability, this flux often can be increased by augmenting
adjacent latent energy transfer which transfers through the partition as
sensible energy. The external balance establishes the net enthalpy
offset and therefore the temperature difference and the net amount of
liquid that may be evaporated or condensed. A pure diffusive heat and
mass transport would lead to an uneven reaction density or current
density in the catalytic reaction layer, on account of a corresponding
lack of uniformity in the heat and mass transport in the same catalytic
reaction layer. A high pressure-drop in the thermally integrated
reformer is to be avoided, since a high-pressure drop is associated with
correspondingly high-power losses, which in turn results in a low
overall efficiency. The conduit surface may vary along the general
direction of flow to provide the zones either intermittently or
preferably continuously as with an undulating membrane surface. When
tubular membranes are employed, which membranes are preferably circular
in cross section, the zones are preferably provided by circumferential
furrowing.
Keywords: Integrated reformers; Temperature differences;
Membrane surfaces; Dimensionless quantities; Heat transport; Mass
transport
Sentiment Analysis of Online Lectures using K-Nearest Neighbors based on Feature Selection
Authors: Junadhi  , Agustin  , Rifqi Mi’rajul , Anam M. Khairul 
Published: January 2023

Online lecture is a distance learning system that utilizes information technology in its implementation. Although it has been agreed, this lecture system has caused controversy. Not infrequently online lectures are considered to bring a variety of new obstacles in lectures, and not a few also consider that online lectures are the most appropriate solution to continue to run lecture activities in the midst of alarming pandemic conditions. In response to this policy, many people expressed various kinds of opinions and views on the implementation of online lectures which are generally stated on social media, one of which is through Twitter. Sentiment analysis is a branch of the science of machine learning that is carried out to obtain useful information or new knowledge by extracting, understanding, and processing text data automatically. Several methods are widely used by researchers to classify sentiment analysis datasets including K-Nearest Neighbor (K-NN). K-NN will be adapted to classify online lecture datasets because K-NN can produce good accuracy on a large number of data. The presence of feature selection also helps machine learning in improving its performance. The purpose of this study was to determine student sentiment toward online lectures and to determine the level of accuracy of the combination of K-NN with various feature selections. Based on 780 tweets data, a classification of 394 positive sentiments, 320 negative sentiments, and 39 neutral sentiments was obtained. So, the results of student opinions are on POSITIVE sentiments. The accuracy result of the K-NN Algorithm was 56% and the accuracy of the K-NN Algorithm + Forward Selection was 51%, the accuracy of the KNN Algorithm + Adabost was 54%, and the accuracy of the KNN Algorithm + Genetic Algorithm was 55%.
Physical and Mechanical Properties of Oriented Flattened Bamboo Boards from Ater (Gigantochloa atter) and Betung (Dendrocalamus asper) Bamboos
Authors: Putri Alfira Ramadhani , Alam Nur , Adzkia Ulfa , Amin Yusup , Darmawan I Wayan , Karlinasari Lina 
Published: January 2023

Bamboo-based composite has been used widely for building components and furniture. Oriented flattened bamboo board (OFBB) is a composite board consisting of oriented structure sheets of flattening bamboo. This study aimed to analyze the physical and mechanical properties of the OFBB from ater (Gigantochloa atter) and betung (Dendrocalamus asper) bamboo. A three-layer flattened bamboo board using the isocyanate resin with a density target of 0.6 g/cm3 was applied. The characteristics of raw bamboo, the contact angle of OFBB, and board properties of density, moisture content, thickness swelling, and water absorption, as well as bending, internal bonding (IB), and compressive strength properties were determined to evaluate the quality of the OFBB. Based on the findings, the thin wall thickness of ater bamboo enhanced the physical and mechanical properties of the OFBB compared to the higher wall thickness of betung bamboo. Therefore, further development in bamboo composite products with those anatomical properties seems promising. The dimensional stability and bending properties of OFBB from ater bamboo met the quality of first grade of the Canadian Standard for OSB and waferboard, except for the IB strength.
Keywords: Bamboo wall thickness, contact angle, Dendrocalamus asper, Gigantochloa atter, oriented flattened bamboo board
Mining Sludge Utilization as Medium Growth for Revegetation Plants through Seed Germination Test
Authors: Pratama Muhamad Ramdhanny , Mansur Irdika , Rusdiana Omo 
Published: January 2023

The limited topsoil stock is one of the post-mining reclamation problems that will directly impact the company’s business processes. One solution that can be considered to reduce production costs is the utilization of unused materials around the mine. The settling pond sludge contains nutrients and can be used as a growing medium for plants to replace topsoil. This study examined the potential utilization of settling pond sludge through germination and sprout viability tests. This study used a completely randomized design with four composting treatments, namely 0%, 25%, 50%, and 75%. The number of replications was ten times and applied to several species of revegetation plants, namely Acacia mangium, Senna siamea, Falcataria moluccana, and Albizia saman, so there were 160 experimental units in total. The results showed that the settling pond sludge has organic matter reserves and low nitrogen content but is rich in P and element reserves of P and K. The physical texture of settling pond sludge was still suitable as a medium for plant growth. The addition of compost as a mixture of settling pond media had a significant effect on germination and germination viability but had no significant effect on the parameters of the germination rate. The increase in compost composition in the settling pond media mixture positively affected germination and germination survival. Based on this research, it is known that settling pond sludge can be used as a medium for growing revegetation plants. In general, the media with the addition of 50% and 75% compost gave the best germination response and viability.
Keywords: Compost, post-mining reclamation, revegetation, seed germination test, settling pond sludge
Physical and Mechanical Properties of Cross-Laminated Timber Made of a Combination of Mangium-Puspa Wood and Polyurethane Adhesive
Authors: Hariz Tengku Muhammad Renzy , Hadi Yusuf Sudo , Lubis Muhammad Adly Rahandi , Maulana Muhammad Iqbal , Sari Rita Kartika , Hidayat Wahyu 
Published: January 2023

This study aimed to evaluate the physical and mechanical properties of cross-laminated timber (CLT) characteristics from mangium (Acacia mangium) and puspa (Schima wallichii) woods and their combination using polyurethane (PU 1.2) adhesives. The manufacture of CLT began with basic adhesive characterization and thermo-mechanical analysis. Wood material’s physical and chemical properties were also tested with its response to the PU 1.2 wettability. The CLT (100 ´ 30 ´ 3.60) cm3 was manufactured with 160 g/m2 glue spread at a pressure of 0.80 MPa for 200 minutes. The CLT panels were characterized refers to the JAS 3079 standard. The results show that PU 1.2 had a gelatination time of 182.1 minutes at 25°C, was able to form urethane groups, and experienced an increase in storage modulus at 35°C. Mangium and puspa woods have different physical and chemical properties, but they interact similarly with PU 1.2 wettability. Puspa CLT panel has a higher density than mangium but lower dimensional stability. The bending mechanical properties of hybrid puspa-mangium-puspa CLT were able to match puspa CLT and have one sample of shear strength that met the JAS 3079 standard in both grain directions. Therefore, hybrid puspa-mangium-puspa CLT has the potential to be developed to improve its dimensional stability and mechanical properties.
Keywords: Acacia mangium, cross-laminated timber, layer combination, polyurethane adhesive, Schima wallichii
Field Study of Infectious Bursal Disease in A Laying Poultry Farm at Khartoum State, Sudan
Authors: Osman Hind E. , Hallane Guled Abdi Ahmed , Edris Marwa Mohamed Badawi Sheikh , Nor Aldaim Mohamed Sadia , Ahmed Rawnag Hassan Alshareef , Osman Omar Mutasim Ali 
Published: January 2023

The aim of this study is to investigate field Infectious bursal disease outbreak in a laying poultry farm. The disease is an economically important worldwide disease in poultry production sector. Serological tests (Elisa, AGID, and immunochromatography), morbidity rate, mortality rate and post-mortem changes were studied. The results showed 100% morbidity, 28% mortality, positive AGID test and immunochromatography test and the Elisa test which was done at the end of the outbreak. Post-mortem revealed haemorrhages in the enlarged and edematous burasa, atrophy of the bursa, haemorrhage in skin, breast, thigh muscles and proventriculus as the most frequently detected lesions. The kidneys were affected showing enlargement, nut meg appearance and pale color Deposition of urates in ureters was also obvious. In conclusion IBD is a serious problem causing a considerable socioeconomic loss for the farmer, consumers and the country as a whole. The disease can be diagnosed using serological tests. IBD needs extensive effort in extension to raise the awareness of the sector about the disease diagnosis, prevention and control.
Evaluation of Phytogenic Feed Additive on Egg Production, Egg Quality and Feed Intake in Layer Chicken
Authors: Suresh Subramaniyam , D'Souza Prashanth , Marimuthu Saravanakumar 
Published: January 2023

The commercial layer production in chicken farms has usually been exposed to wide range of stress stimulants, which adversely affect the feed intake and body weight that in-turn depress the egg production and quality. Hence, it’s a major area of concern to reduce the stress and increase the production benefiting the farmer and health of the bird. The present study was designed to evaluate the impact of phytogenic feed additive (PGC) on egg production, egg quality and feed intake in layer chicken. A total of 320 birds of age 65 weeks of BV300 layers were randomly assigned to 2 groups (Control and PGC groups) with 10 replicates comprising 16 birds each (n = 160). The control group was provided with standard commercial feed as recommended by NRC specifications. In PGC group PhytoceeTM was supplemented at 200 g/ton with standard commercial feed. The study period was 6 weeks (65 weeks to 70 weeks) and data was collected on 7 days interval. The data on egg production, feed intake and egg quality parameters (egg weight and shell parameters) were collected during the study. The group fed with PGC had showed numerical improvement in egg production and decreased egg defects during the study period when compared to control group. The feed intake was not much altered in both the groups. The egg density, egg strength, shell weight, shell thickness and shell percentage were numerically improved in PGC supplemented group when compared with control. The supplementation of PGC had considerably improved the egg quality and production parameters in layer birds by helping them in reducing the harmful effects of stress.
Peningkatan Mutu Pembelajaran Melalui Optimalisasi Peran Guru Sebagai Manajer Kelas di SDN 1 Sokaraja Kulon
Authors: Maesaroh Siti 
Published: January 2023

The purpose of this study was to see the manager's ability, teachers' understanding of classroom management and the role of teachers as class managers to optimize the quality of learning at SDN 1 Sokaraja Kulon. This study used a qualitative approach with descriptive analysis, data techniques were carried out by interview, observation and documentation. The data analysis used consisted of data reduction, data collection and data retrieval. Sources of research data were school principals, teachers. The result of this research is that the role of teachers as class managers in SDN 1 Sokaraja Kulon can improve the quality of learning.

Abstrak
Tujuan penelitian ini adalah untuk mengetahui kemampuan manajer, pemahaman guru tentang pengelolaan kelas dan peran guru sebagai manajer kelas untuk mengoptimalkan mutu pembelajaran di SDN 1 Sokaraja Kulon. Penelitian ini menggunakan pendekatan kualitatif dengan jenis analisis deskriptif, tekhnik pengumpulan data dilakukan dengan wawancara, observasi dan dokumentasi. Analisis data yang digunakan terdiri dari reduksi data, penyajian data dan penarikan kesimpulan.sumber data penelitian adalah kepala sekolah, guru. Hasil penelitian ini adalah peran guru sebagai manajer kelas di SDN 1 Sokaraja Kulon dapat meningkatkan mutu pembelajaran.
Hubungan Antara Motivasi Berprestasi Dengan Prokrastinasi Akademik Mahasiswa Psikologi Universitas Medan Area
Authors: Siregar Mulia 
Published: January 2023

Abstrak Penelitian ini bertujuan untuk melihat hubungan antara motivasi berprestasi dengan prokrastinasi akademik pada mahasiswa Fakuktas Psikologi stambuk 2012 Universitas Medan Area dengan sampel sebanyak 44 mahasiswa. Hipotesis yang diajukan dalam penelitian ini adalah bahwa terdapat hubungan negatif antara motivasi berprestasi dengan prokrastinasi pada mahasiswa Fakultas Psikologi Universitas Medan Area. Berdasarkan analisis data dengan menggunakan Metode Analisis Product Moment, diperoleh hasil bahwa terdapat hubungan negatif yang tidak signifikan antara motivasi berprestasi dengan prokrastinasi akademik pada mahasiswa Fakultas Psikologi Universitas Medan Area. Dengan nilai rxy = 0,031 p= 0,844> 0,050. Artinya motivasi berperstasi tidak mimiliki hubungan dengan prokrastinasi akademik maka hipotesis yang telah diajukan dalam penelitian ini, dinyatakan ditolak. Dimana diketahui mean empirik prokrastinasi akademik 70.7500 yang lebih besar dari pada hipotetiknya 62.50 dan mean empirik motivasi berprestasi 72.2727 yang lebih kecil daripada nilai hipotetiknya 100. Kata Kunci : Prokrastinasi Akademik, Motivasi Berprestasi
Gambaran Penerimaan Diri Ibu Tiri yang Memiliki Anak Tunarungu (The Overview of Stepmother’s Self-Acceptance who has a Deaf Child)
Authors: Daulay Debby Anggraini , Chairiyah Rizky 
Published: January 2023

ABSTRAK Penelitian ini bertujuan untuk mengetahui gambaran penerimaan diri ibu tiri yang memiliki anak tunarungu. Status ibu tiri yang memiliki penilaian negatif di masyarakat membuat ibu tiri membutuhkan adaptasi untuk menerima statusnya dan kondisi keluarganya termasuk kondisi anak tirinya yang tunarungu. Kekurangan bahasa dan lisan membuat anak tunarungu membutuhkan pelayanan khusus dari orang tua ataupun pengasuhnya. Berkaitan dengan kompleksitas mengenai status ibu tiri dan kondisi anak tunarungu tersebut, maka akan mempengaruhi proses penerimaan diri ibu tiri. Teori yang digunakan dalam penelitian ini adalah teori penerimaan diri dari Jersild (1963) dimana penerimaan diri adalah derajat dimana individu memiliki kesadaran terhadap karakteristiknya,ia mampu dan bersedia untuk hidup dengan karakteristik tersebut. Penelitian ini menggunakan metode penelitian kualitatif dengan pendekatan studi kasus intrinsik. Melibatkan 2 orang partisipan dengan menggunakan teknik pengambilan partisipan berdasarkan theory-based operational construct sampling. Teknik pengambilan data yang digunakan adalah metode wawancara dan observasi. Hasil penelitian menunjukkan bahwa kedua partisipan memiliki penerimaan diri yang baik terhadap statusnya sebagai ibu tiri. Partisipan 1 menerima dirinya sebagai ibu tiri yang memiliki anak tunarungu dan menjalani kesepuluh aspek penerimaaan diri dengan baik. Partisipan 1 juga sudah menerima dan menganggap anak tirinya yang tunarungu sebagai anaknya sendiri. Partisipan 2 telah memiliki penerimaan diri yang baik terhadap statusnya sebagai ibu tiri dan dapat menjalani kesembilan aspek penerimaan diri dengan baik dalam hidupnya. Aspek yang tidak terpenuhi pada partisipan 2 yaitu tidak memiliki penerimaan orang lain dengan baik. Namun, partisipan 2 belum bisa menerima dan menganggap anak tirinya yang tunarungu sebagai anaknya sendiri. Hal tersebut dikarenakan perilaku kasar anak tirinya dan penolakan dari ibu mertuanya terhadap dirinya. Pemikiran positif juga berpengaruh terhadap proses penerimaan diri partisipan 1 dan partisipan 2, sehingga kedua partisipan mampu menjalani proses penerimaan dirinya. Kata Kunci : Ibu Tiri, Anak Tunarungu, Penerimaan Diri
GAMBARAN PROSES PENERIMAAN DIRI REMAJA TUNADAKSA KARENA KECELAKAAN LALU LINTAS
Authors: Zafira Hana , Nasution Indri kemala 
Published: January 2023

ABSTRAK Penelitian ini bertujun untuk mengetahui bagaimana proses penerimaan diri remaja tunadaksa karena kecelakaan lalu lintas dengan menggunakan pendekatan kualitatif. Berdasarkan hasil wawancara pada dua orang partisipan, didapati bahwa kedua partisipan merasa malu ketika berinteraksi dengan orang lain dan hal itu membuat kedua partisipan sering mempunyai keinginan untuk kembali dengan tubuhnya yang normal. Tahapan penerimaan diri kedua partisipan berbeda, partisipan 1 berada pada tahap ketiga yang ditandai dengan keinginannya untuk menghilangkan perasaan dan pikiran mengenai kecelakaan dan keinginan untuk kembali sempurna. Sedangkan partisipan 2 sudah mencapai tahap keempat di mana dia memilih untuk tidak terlalu memikirkan mengenai pikiran dan perasaan akan ketidaksempurnaannya. Kata Kunci: penerimaan diri, remaja tunadaksa, kecelakaan lalu lintas THE DESCRIPTION OF SELF ACCEPTANCE PROCESS ON ADOLESCENT WITH PHYSICAL DISABILITIES DUE TO TRAFFIC ACCIDENT ABSTRACT The purpose of this study is to describe the self­ acceptance process on adolescent with physical disabilities due to traffic accident by using qualitative approach. Based on an interview’s results with two participants, we found that both participants feel a shame when interacted with other persons and it makes both participants have a desire to back with their normal body. Both participants have a different stage of self acceptance process, participant 1 is on the third stage which marked with her willingness to remove the feeling and a thought about the accident and desire to back with her perfect body. Whereas, participant 2 has reached the fourth stage which she choose not to think too much about her thought and feeling of her imperfection. Keywords: self acceptance, adolescent with physical disabilities, traffic accident
MENINGKATKAN KETERAMPILAN MAHASISWA DALAM MEMAHAMI TINGKAH LAKU BERBASIS TEORI KEPRIBADIAN MELALUI IMPEMENTASI “PEMBELAJARAN PENGALAMAN LANGSUNG” DAN “PEMBERIAN UMPAN BALIK” YANG BERDAMPAK PADA SELF EFFICACY ENCREASING THE STUDENT’S SKILL IN UNDERSTAND
Authors: S.Psi,MS Prof. Asih Menanti 
Published: January 2023

ABSTRACT This study done was caused by the existing needs to be competent guidance and counseling student in understanding the student’s behavior. The objective of this study were to encrease the guidance and counseling student’s skill and knowledge in arranging and implementing instrument as well as interpreting the student’s behavior based on the personality theory. This study is classroom action research done in two cycles, each cycles consist of three time lecturing sessions. The result of this study show that the subject matter learning about understanding behavior in the subject of personality theory which implement “the direct exspriences” and “the feedback presentation” pronote the student’s competence and mastery in understanding, the student’s behavior, and influence on their self efficacy promotion. It is concluded that learning that implement, “the direct experience” and “the feedback presentation” were alternatively applicable by lectures in encreasing the student’s competence to understand behavior and to encrease self efficayy. Keywords : The understanding behavior, the direct exsprience and feedback.