bluuebunny/crossref_metadata_2025 huggingface dataset:
Infection with SARS-CoV-2 lineage B.1.1.7 in Three Malayan Tigers at the Virginia Zoological Park
Authors: Mitchell Patrick K. , Martins Mathias , Reilly Tara , Caserta Leonardo C. , Anderson Renee , Cronk Brittany D. , Murphy Julia , Goodrich Erin L. , Diel Diego G.
Published: June 2021

We report three cases of SARS-CoV-2 lineage B.1.1.7 infection in Malayan tigers at the Virginia Zoo. All three animals exhibited respiratory signs. These findings show the mutations in the B.1.1.7 lineage did not affect the susceptibility of tigers to SARS-CoV-2.
UP-Regulation of Dicer and Drosha Expression in Ovarian Cancer Tissues
Authors: razmkhah sanaz
Published: June 2021

BACKGROUND: miRNAs show to play fundamental roles in diverse cellular processes and associate with a variety of cancers. DROSHA and DICER are two major enzymes in the miRNA maturation process. OBJECTIVE: Dicer and Drosha genes expression investigated Ovarian Cancer and analyzed the impact of clinicopathological characteristics on their expression. METHODS: The present study has performed on 50 cancer patients (50 tumor tissue samples and 50 marginal tissue samples) overall, 100 specimens referred to Al-Zahra Hospital's surgical department in Tabriz and Motahari Hospital Urmia for identification and treatment during 2018 and 2019. After extracting total RNA and cDNA Synthesis, using the HRM-PCR method, the rate of change in the expression of DROSHA and DICER genes assessed using the 2-ΔΔCT method. Data were analyzed using Paired t-test and Kolmogorov–Smirnov test. RESULTS: Our study showed a significant difference in the rate of expression changes in DROSHA and DICER genes in tumor tissue compared to marginal tissue. This difference was associated with an increase in DROSHA and DICER gene expression.CONCLUSIONS: Up-regulated expression of miRNAs biogenesis machinery enzymes (Dicer and Drosha) during ovarian cancer can alter the miRNA expression involved in the pathogenesis of malignancy.
Bioremoval of PVP coated silver nanoparticles using Aspergillus niger: the role of exopolysaccharides
Authors: Gomaa Ola M. , Elrshim Amar , Chanda Anindya
Published: June 2021

The rapidly growing production and applications of Engineered Nanoparticles (ENPs) foresees a concomitant increase in the exposure of humans to their potential toxic effects through accidental release to the environment. Due to the limited and/or contaminated water resources, the need to re-use treated water has become imperative. The present work aims to study the removal of Polyvinylpyrrolidone coated silver nanoparticles (PVP-Ag-NPs) using Aspergillus niger and depict the role of exopolysaccharides in the removal process. Our results show that the majority of PVP-Ag-NPs were attached to fungal pellets. About 74% and 88% PVP-Ag-NPs were removed when incubated with A. niger pellets and exopolysaccharide-induced A. niger pellets, respectively. Ionized Ag decreased by 553 and 1290 fold under the same conditions as compared to stock PVP-Ag-NP. The increase in PVP-Ag-PVP concentrations resulted in an increase in reactive oxygen species (ROS) in 24h. The UV-Visible spectrum shows the disappearance of Ag characteristic peak and the broadness of the spectrum suggested an increase in size. Dynamic Light Scattering results showed an increase in PVP-Ag-NPs size from 28.4 nm to 115.9 nm for A. niger pellets and 160.3 nm after removal by stress-induced A. niger pellets and further increased to 650.1 nm for in vitro EPS removal. Our findings show that EPS can be used for nanoparticle removal, by increasing the net size of nanoparticles in aqueous media, this will, in turn, facilitate its filtration through conventional filtration techniques commonly used at wastewater treatment plants.
Assessment of researches and case studies on Cloud Manufacturing: A bibliometric analysis
Authors: Morelli Daniel Alexandre , Ignacio Paulo Sergio de Arruda
Published: June 2021

Cloud computing technology has been studied in the context of industry 4.0 as a tool applied to manufacturing services and resources. Such concept is widely known as Cloud Manufacturing. This paper aims at mapping the current state of academic researches on this field, promoting the understanding of trends, references and practical applications in real-life conditions. A bibliometric analysis was conducted using two different databases – Scopus and Web of Sciences – and VOSviewer’s text mining tools and techniques. From a sample of 1,420 papers, this study identified the countries which had the largest volume of publications, the main journals related to the subject, the most influent articles, and four clusters by keywords occurrences: (i) “Optimization of manufacturing processes”, (ii) “Collaborative networks of manufacturing resources and services”, (iii) “Industry 4.0 and cloud computing systems”, and (iv) “Data reliability and cyber-security”. Finally, this work selected and analyzed the 159 articles with applied case studies, in order to stratify and to understand the most common approaches within the four pre-established categories. This article can contribute to researchers and developers searching for successful practical applications in digitalization of manufacturing chains, as well as to those who are looking for gaps in the still unexplored fields of Cloud Manufacturing. Both the assessment and the categorization of the case studies about Cloud Manufacturing is a differential in this article.
STRUCTURAL ASPECTS DURING CONVERSION FROM GENERAL CARGO SHIPS TO CEMENT CARRIERS
Authors:   Croatian Register of Shipping, Split, Croatia, Jurišić Paul , Parunov Joško ,   University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia
Published: June 2021

An approach to converting general cargo ship to cement carrier is analysed in the present study, emphasising the structural aspects of the conversion. A comprehensive re-appraisal of the conditions of the ship hull, considering her history and present condition of the structure, is provided. Two case studies are presented where the strength assessment has been performed using 2D sectional and 3D finite element models, generated according to the available hull drawings and thickness measurement reports. The results of the two studies are interpreted with respect to the structural modifications carried out during the conversion process, and some general conclusions are drawn.
Interviewer allocation through interview–reinterview nested design for response error estimation in sample surveys
Authors: Fahmi Fidan Mahmut , Öztaş Ayhan H. , Batmaz İnci
Published: June 2021

In surveys, non-sampling errors, due to their complex nature, are more challenging to quantify compared to sampling errors. Avoiding the release of these errors, however, results in biased survey estimates. In our previous paper, we devised the best interviewer allocation technique by using a nested experimental design to study response error estimation. In this study, in order to illustrate the effectiveness of this methodology in a different context, we apply it in interview-reinterview surveys relating to the time use and life satisfaction of academicians at Middle East Technical University, Turkey. An analysis of the pilot survey data showed that only half of the data was reliable, while the other half revealed interviewer effects. Prior to the main survey, interviewers underwent training in the course of which particular emphasis was put on the above-mentioned questions. In effect, the previously observed response variances which accounted for the total variance and data unreliability, were reduced considerably, increasing the quality of the main survey.
Pathological findings in common foxes suffering from cardiorespiratory syndrome
Authors: NOSZCZYK-NOWAK AGNIESZKA , JANUS IZABELA , PIASECKI TOMASZ
Published: June 2021

Introduction: Cardiorespiratory syndrome of common foxes has been reported since the 1980s. Although the condition is observed at a number of farms in Europe and America, its etiology still remains elusive. Materials and methods: The study was conducted at a common fox (Vulpes vulpes) farm located in Central Poland, having a total of 500 females and 150 males and an average yearly production of 1,900 cubs. Deaths due to cardiorespiratory syndrome were recorded at the farm in 2012 and 2013, corresponding to 5.32% and 2.14% new young mortality rates, respectively. Postmortem examination included 38 foxes that died in 2013, as well as 12 hearts collected from foxes that died in 2012. Results: Gross pathological findings documented in the examined material were generally typical for the cardiorespiratory syndrome of foxes. However, detailed pathological examination of the hearts revealed a dilatation of the right atrioventricular opening and abnormal structure of the tricuspid valve in all cases. The septal cusp was shortened, thickened, and immobilized due to fusion with the interventricular septum. Conclusions: The fact that tricuspid valve dysplasia was observed on postmortem examination of all animals that died with the symptoms of cardiorespiratory syndrome confirms a potential involvement of congenital heart defects in the etiology of this condition.
Chemodectoma located in the left atrium in 11 month survival dog with the use of palliative therapy
Authors: SZALUŚ-JORDANOW OLGA , STABIŃSKA-SMOLARZ MARTA , CZOPOWICZ MICHAŁ , DZIUBIŃSKA-OSKIERA MAŁGORZATA , SAPIERZYŃSKI RAFAŁ , MOROZ3 AGATA , MICKIEWICZ MARCIN
Published: June 2021

The aim of this study was to present a clinical case of chemodectoma located in the left atrium in a dog. Chemodectoma is a heart base tumor, neoplasms that occur in the proximity of major blood vessels. A presumptive diagnosis is made based on location and appearance of the tumor in echocardiography examination. In advanced diagnostics computed tomography (CT) and magnetic resonance imagining (MRI) are used. Final diagnosis is made mainly during autopsy based on histopatological examination or less commonly in veterinary medicine on a histopathological examination of the tissue taken during a biopsy or of the entire removed tumor. In literature few methods of treatment are presented, including surgery, chemotherapy and radiotherapy. In an 8-year-old male French bulldog a tumor in the left atrium was detected. The tumor filled almost the entire left atrium, additionally pericardial effusion and ascites were observed. For treatment, tarantula cubensis extract (Theranecron) was used. After the introduction of Theranecron the patient felt significantly better. Theranecron may be one of the possibilities of palliative therapy in the case of diagnosing inoperable chemodectoma.
The process of carcinogenesis described by mathematical formulas
Authors: MADEJ JANUSZ A.
Published: June 2021

The paper presents neoplasms as dissipative structures formed de novo in the host organism under conditions far from thermodynamic equilibrium. The neoplastic process has also been described as a form of random ”blastoid regeneration” (Fig. 2), and the use of information theory elements in this process has been shown to be expedient. The dissipative (precancerous) state may regress, or a thermodynamic branch may develop, and from it – as a result of neoplastic transformation – neoplasm, as illustrated in Figure 4, in the form of an ontogenetic ”tree”. Structures dissipative with fluctuating changes can probably create more and more organized formations, and thus the molecular level would explain Darwin’s theory of evolution and selection. Neoplasms are emergent structures created in the creative process and as disordered and unstable systems, they tend to the state of thermodynamic equilibrium, i.e. death. Their death can be accelerated by anti-cancer therapy or they die with the death of the macro-organism.
Comparison of the Vcheck and IMMULITE 2000 methods for cortisol measurement in canine serum
Authors: ADASZEK ŁUKASZ , TEODOROWSKI OLIWIER , STANIEC MARTA , JANECKI RADOSŁAW , JACKOWSKA-PEJKO NATALIA
Published: June 2021

The aim of this study was to compare canine cortisol results obtained by the Vcheck method with those obtained by the IMMULITE 2000 immunoassay, which had previously been validated for canine serum. The concentration of cortisol in 44 canine serum samples was determined concurrently by the Vcheck and IMMULITE methods, the latter as the reference method. Cortisol values were compared using Pearson’s correlation analysis and simple regression analysis. Agreement between the two methods was calculated with a Bland-Altman plot. According to regression analysis and the Bland-Altman plot, the two methods gave comparable results. The results of the Vcheck method were comparable to those of the IMMULITE 2000 reference method, so the Vcheck may be used as an alternative assay to evaluate serum cortisol concentration in dogs for the diagnosis of adrenal disease.
Radical Cystectomies at the University Teaching Hospital, Lusaka: Baseline Characteristics, Short-term Complications, and Role of Nursing Care
Authors: Chamileke Nkomba
Published: June 2021

Bladder cancer is the ninth most common cancer in the world and the 11th most common cancer in Zambia. Bladder cancer is of three histological types, Squamous cell cancer, Transitional cell cancer, and Adenocarcinoma. The most common histological type in Zambia is Squamous cell cancer accounting for 60 percent of cases of muscle-invasive bladder cancer. The treatment of muscle-invasive bladder cancer is radical cystectomy, Lymph node dissection, and urinary diversion. Globally, radical cystectomy is associated with high morbidity and mortality. The most common diversion used was uretero-sigmoidostomy, accounting for 60 percent of cases. In our case series, the most common complications were wound dehiscence, hypo-proteinemia, bowel ileus, deep vein thrombosis, and electrolyte imbalance. Identification and prevention of complications associated with this procedure play a crucial role in improving survival for these patients. The role of nursing staff in the early recognition of these complications cannot be overemphasized.
Lipase-Mediated Dynamic Kinetic Resolution of 1-Phenylethanol Using Niobium Salts as Racemization Agents
Authors: Higa Vanessa , Rocha Willian , de Sairre Mirela Inês , Omori Álvaro
Published: June 2021

In this work, a racemization method of (S)-1-phenylethanol by niobium salts was developed. Among the salts available, the niobium phosphate hydrate (NbOPO4.nH2O) reduced the enantiomeric excess (ee) of the chiral alcohol from 95 to 0% after 24 h at 60 ºC in toluene. This new racemization agent was combined with a lipase (CALB) in order to achieve a chemoenzymatic dynamic kinetic resolution (DKR). Experiments demonstrated that the DKR process is feasible and the corresponding (R)-1-phenylethyl acetate was obtained with 92% conversion and 85% ee.
Gas Chromatography-Mass Spectrometry Profile of Essential Oils Derived from Zingiber officinale Rosc. Rhizome
Authors:   Chemistry Department, Faculty of Mathematics and Natural Sciences, Brawijaya University, Dwi Wijaya Noval , Rohmah Lailatul ,   Chemistry Department, Faculty of Mathematics and Natural Sciences, Brawijaya University, Anggraini Eria ,   Chemistry Department, Faculty of Mathematics and Natural Sciences, Brawijaya University, Ayu Ning Tyas Rana ,   Chemistry Department, Faculty of Mathematics and Natural Sciences, Brawijaya University, Wahyu Aji Wibowo Rizki ,   Chemistry Department, Faculty of Mathematics and Natural Sciences, Brawijaya University, Masruri Masruri ,   Chemistry Department, Faculty of Mathematics and Natural Sciences, Brawijaya University
Published: June 2021

White ginger which is also called Jahe Putih (Zingiber officinale) in Indonesia, is widely used in local Indonesian communities. It is a popular ingredient in beverages for stamina and also a bioactive ingredient for many traditional Indonesian food recipes. It is a popular ingredient in beverages for stamina and also a bioactive ingredient for many traditional food recipes. However, with the increase in demand for ginger related products, fake ginger formulated products are widespread in the market. This paper is disclosed the chemical profile of essential oil obtained from steam distillation of the local ginger. The results of this study can be used as a standard to detect original ginger. It was found that the chemical composition of the essential oil obtained from the white ginger contained 0.19% of a dried weight after 3 h of steam distillation. A total of 40 monoterpenoids (C10) and sesquiterpenoids (C15) secondary metabolite compounds were respectively detected in the oil.
The Mechanically Extraction Process of Gambier (Uncaria gambier Roxb.) from Limapuluh Kota, West Sumatera and Its Antioxidant activity
Authors:   Research Center for Chemistry, Indonesian Institute of Sciences (LIPI), Widiyarti Galuh , Sundowo Andini ,   Research Center for Chemistry, Indonesian Institute of Sciences (LIPI), Filailla Euis ,   Research Center for Chemistry, Indonesian Institute of Sciences (LIPI), Arya Laksmono Joddy ,   Research Center for Chemistry, Indonesian Institute of Sciences (LIPI)
Published: June 2021

The extraction process from leaves and twigs of gambier (Uncaria gambier Roxb)plant was conducted mechanically by using traditional hydraulic press, conventional screw press, and modified twin-screw press. The leaves and twigs of gambier plant was obtained from traditional farmer in Limapuluh Kota, West Sumatera, Indonesia. The water, ash and catechin contents of the gambier extracts were analyzed based on SNI 01-3391-2000 using spectrophotometry and thermogravimetry method. Antioxidant activity analysis of the extracts was also performed by 1,1-diphenyl-2-picrylhidrazyl (DPPH) method and compared tovitamin C as a standard antioxidant. The analysis results showed that the extracts contain no ash. Meanwhile, the catechin and water contents of the extracts were approximately 50 and 13% thus the extracts were classified as quality gambier 2. Other than that, analysis result of catechin and epicatechin contents of the extracts using HPLC and compared to the reference materials showed that catechins contents of the extracts using traditional hydraulic press, conventionalscrew press, and modified twin-screw press give catechin content in about 94.296-95.030%. However, epicatechin was detected in a trace amount. The antioxidant activity of the extracts were 2.5 times stronger than reference. The IC50 value of 4.37-4.52 µg/mL and was categorized as active antioxidant.
Synthesis and Characterization of Lithium Iron Phosphate Carbon Composite (LFP/C) using Magnetite Sand Fe3O4
Authors:   Chemistry Department, Faculty of Science and Engineering, University of Bojonegoro, Anisa Zuffa , Zainuri Mochammad ,   Physics Department, Faculty of Mathematic and Sciences, Institute Technology of Sepuluh Nopember
Published: June 2021

Lithium Ferro Phosphate Carbon Composite (LFP/C) had been synthesized using solid-state reaction method. Magnetite sand Fe3O4 was used as Fe- source in LFP/C synthesized. Calcination temperature of the sample performed at 400, 500, and 600°C. The phase and composition of samples determined by Rietveld analysis of X-ray diffraction (XRD) pattern. The dominant identified phase at 400°C was diphosphate LiFeP2O7, and the others phases were nasicon Li3Fe2(PO4)3 and hematite Fe2O3. As the temperature getting higher the diphosphate phase LiFeP2O7 transform to nasicon Li3Fe2(PO4)3.The chemical bonds, lattice vibration and other structural features of the sample were investigated using FTIR spectroscopy in range of 1400 – 400 cm-1. Specific vibration modes in LFP-1 to LFP-3 for each bonding were shown by the high intense in certain wavenumber.
Focus. Een driedelige christologie die te denken blijft geven.
Authors: Kater M.J.
Published: June 2021

N.a.v.: Heinrich Assel, Elementare Christologie. Dl. 1: Versöhnung und neue Schöpfung. Dl. 2: Der gegenwärtig erinnerte Jesus. Dl. 3: Inkarnatyion des Menschen und Menschwerdung Gottes (Gütersloh: Güthersloher Verlagshaus, 2020) 1344 p., € 98,00 (ISBN 978-3-579-08136-6).
Tingkat kepuasan pengguna dan analisis kebutuhan pengembangan Laboratorium Jurusan
Authors: Sungkono Sungkono , Nugroho Ariyawan Agung , Miyarso Estu
Published: June 2021

Tujuan penelitian ini untuk mengetahui  tingkat kepuasan pengguna laboratorium Jurusan KTP FIP UNY saat ini dan untuk mengetahui gambaran kebutuhan apa saja untuk  pengembangan laboratorium  Jurusan KTP FIP UNY.Penelitian ini menggunakan pendekatan  kuantitatif dengan jenis metode survey. Subjek penelitian ini adalah seluruh pengguna Laboratorium Jurusan KTP FIP UNY baik pengguna internal maupun eksternal. Adapun pengambilan sampel menggunakan teknik stratified random sampling . Adapun sampel penelitian ini berjumlah 175 mahasiswa. Instrumen pengumpulan data yang digunakan dalam penelitian ini yaitu  angket tertutup dan terbuka. Teknik analisis data yang digunakan dalam penelitian ini yaitu deskriptif kuantitatif.  Hasil penelitian menunjukkan bahwa tingkat kepuasan mahasiswa sebagai pengguna internal Lab Jurusan KTP FIP UNY termasuk pada kategori baik (rerata skor 3,52).  Hal ini dapat diartikan pula bahwa tingkat kepuasan mahasiswa pengguna terhadap Lab Jurusan KTP FIP UNY pada tahun 2015 adalah tinggi.  Indikator tingginya tingkat kepuasan pengguna lab jurusan ini ditunjukkan dari aspek tangible yang memperoleh rerata skor penilaian 3,48, aspek responsiveness dengan rerata skor penilaian 3,60, aspek assurance dengan rerata skor 3,53, dan aspek empathy dengan rerata skor 3,47.  Hanya aspek reliability saja yang mendapat skor 3,42 atau masuk pada kriteria cukup. Hasil analisis kebutuhan menunjukkan bahwa secara keseluruhan sudah baik atau sudah memadai. Hal ini terbukti 61% dari 175 orang responden mahasiswa pengguna menilai bahwa ketersediaan sarana prasarana, SDM lab, dan program layanan sebagai komponen kebutuhan untuk pengembangan Lab Jurusan KTP FIP UNY sudah memadai.
Analisis Kuat Tekan Mortar Geopolimer Berbahan Silica Fume dan Kapur Tohor
Authors: Riyanto Eko , Widyananto Eksi , Renaldy Rahul Ray
Published: June 2021

ABSTRACT Cement Portland is an essential ingredient in infrastructure development, but in portland cement production, there is a release of carbon dioxide (CO2). Innovation in materials in the construction of mortars, namely geopolymer mortars, is expected to reduce cement and air pollution. The research using experimental methods, aimed at locating the effect of the use of silica fume and quick lime with variations of silica fume: quick lime 90:10, 80:20, 70:30, 60:40, 50:50, using a cube mold of 5 x 5 x 5 cm as much as 120 items, for testing age 7, 14, 28 days. Research has a compressive strength with an optimum geopolymer mortar on a variation of silica fume: quick lime 70:30, which is 3.52 MPa at the age of 28. Based upon compressive strength results, apply the age of mortar 7, 14, 28 days known the longer a strong mortar age agency.  Silica fume and quick lime may be used as alternative materials to replace cement. Based on ASTM C 270 to imply mortars type K and type O. ABSTRAKSemen portland merupakan bahan material penting dalam pembangunan khususnya di bidang teknik sipil, namun dalam proses produksi semen portland terjadi pelepasan karbon dioksida (CO2). Perlu adanya inovasi bahan dalam pembuatan mortar yaitu mortar geopolimer yang diharapkan dapat mengurangi penggunaan semen dan polusi udara. Penelitian ini menggunakan metode eksperimental, bertujuan mengetahui pengaruh penggunaan silica fume dan kapur tohor terhadap mortar geopolimer dengan variasi silica fume:kapur tohor 90:10, 80:20, 70:30, 60:40, 50:50, benda uji berbentuk kubus berukuran 5 x 5 x 5 cm sebanyak 120 benda uji, pengujian umur 7, 14,  28 hari. Hasil penelitian didapat kuat tekan optimum mortar geopolimer pada variasi silica fume:kapur tohor 70:30 yaitu 3,52 MPa pada umur 28 hari. Berdasarkan hasil kuat tekan pengaruh umur mortar 7, 14, 28 hari diketahui semakin lama umur mortar kuat tekan semakin meningkat. Silica fume dan kapur tohor dapat digunakan sebagai bahan alternatif pengganti semen. Berdasarkan ASTM C 270 termasuk dalam mortar tipe K dan tipe O.
Perencanaan Perkerasan Kaku Jalan Eksisting Lenangguar – Lunyuk STA 04 – STA 06
Authors: Maha Ummi Khairiyah Br , Hermansyah Hermansyah , Dharmawansyah Dedy
Published: June 2021

ABSTRACT The existence of roads is essential to support economic growth, agriculture, and other sectors. This is because the road is an essential means of transportation to serve people and goods from one place to another safely, comfortable, and economical. Therefore, it is necessary to plan related to the road pavement. Inappropriate pavement planning is the main cause of road damage. The planning for rigid pavement refers to the often-used guidelines, namely, the Road Pavement Design Manual (Revised on June 2017). The thick design of rigid pavement for the Lenangguar - Lunyuk, using quality of concrete of K400 with a thickness of 19 cm. The sub-foundation uses Lean Mix Concrete with K125 concrete quality and 10 cm of thickness. Dowel 33 mm in diameter uses steel bars 45 cm in length and 40 cm distances. Tie Bar fastener with 16 mm in diameter using a threaded rod, length 70 cm, and distance between rods 75 cm, respectively. ABSTRAKKeberadaan jalan raya sangatlah penting untuk menunjang laju pertumbuhan ekonomi, pertanian dan sektor lainnya. Hal ini dikarenakan jalan merupakan suatu sarana transportasi yang sangat penting untuk melayani pergerakan manusia dan atau barang dari suatu tempat ke tempat lain secara aman, nyaman dan ekonomis, maka dari itu perlu dilakukan perencanaan terkait perkerasan jalan. Perencanaan perkerasan jalan yang tidak sesuai menjadi penyebab utama dari kerusakan jalan. Perencanaan pekerasan kaku ini mengacu pada pedoman yang sering digunakan yaitu, Manual Desain Perkerasan Jalan (Revisi Juni 2017). Dalam rancangan tebal perkerasan kaku jalan lintas Lenangguar – Lunyuk, menggunakan beton K 400 dengan tebal 19 cm. Pondasi bawah menggunakan Lean Mix Concrete dengan mutu beton K 125 dengan tebal 10 cm. Dowel berdiameter 33 mm menggunakan ruji baja polos degan panjang 45 cm dan jarak 40 cm. Pengikat Tie Bar berdiameter 16 mm menggunakan batang ulir, panjang 70 cm dan jarak antar batang 75 cm.
Effect of cooling distance on DC-LSND treatment on weld defects and weld fractures of A-36 steel
Authors: Wibowo Heri , Ilman Muhammad Noer , Iswanto Priyo Tri
Published: June 2021

Control of weld defects and weld fractures in the welding construction should be done to provide the quality assurance of the welding products and to provide a positive assessment of construction to meet technical and economic requirements. The objective of this study is to investigate the effect of the cooling distance on DC-LSND (dynamic controlled low stress no distortion) treatment on weld defects and weld fractures to obtain the best characteristic of the treatment. In this research, DC-LSND treatment was performed by cooling the both sides near weld line applied in welding process. The cooling media used cryogenic liquid nitrogen sprayed by nozzle. The nozzle was placed at a various distance behind the weld torch. Weld defect was investigated by radiograph test. Tensile strength was tested by servo pulser machine and weld fracture was examined by macro structure and SEM. Results showed that the DC-LSND treatment with a cooling nozzle that is too close to the weld torch has the potential to cause weld imperfections. Porosity and initial welding defect lead to the decrease in the tensile strength of the weld metal and the brittle fracture based on the fracture shape. SEM fractography shows that DC-LSND treatment tends to increase the number of inclusions that have an effect on increasing hardness.
PERANCANGAN SISTEM INFORMASI AKADEMIK SISWA MENGGUNAKAN CODEIGNITER 3 DI SMKN 4 PAYAKUMBUH
Authors: Marzuki Zeki , Musril Hari Antoni
Published: June 2021

ABSTRACT:In its implementation, the academic system that runs at SMKN 4 Payakumbuh is deemed not optimal; this is because the system used is still manual. With these problems, various problems arise, especially in the assessment process, attendance, and information about student development to parents. For that, we need an information system that is able to support decision-making in obtaining information on academic activities at SMKN 4 Payakumbuh. The making of this academic information system uses a Codeigniter 3 framework, while the research method used is (R & D). The model used is the 4D version by applying the waterfall model. Based on the results of the research conducted, the researcher succeeded in creating an academic information system for students at SMKN 4 Payakumbuh. The results of the validity test conducted by a computer expert on this product get a value of 0.89 which is very good. The practical test results were carried out by curriculum representatives with a value of 1.0, which is very practical. And the results of the effectiveness test with the homeroom teacher and students with a value of 0.98 are very good.ABSTRAK:Dalam pelaksanaannya, sistem akademik yang berjalan di SMKN 4 Payakumbuh dirasa belum optimal, hal ini dikarenakan sistem yang digunakan masih bersifat manual. Dengan permasalahan tersebut maka muncul berbagai permasalahan terutama pada proses penilaian, absensi serta informasi mengenai perkembangan siswa kepada orang tua. Untuk itu, diperlukan suatu sistem informasi yang mampu mendukung pengambilan keputusan dalam memperoleh informasi kegiatan akademik di SMKN 4 Payakumbuh. Pembuatan sistem informasi akademik ini menggunakan framework Codeigniter 3, sedangkan metode penelitian yang digunakan adalah (R&D). Model yang digunakan adalah versi 4D dengan menerapkan model waterfall. Berdasarkan hasil penelitian yang dilakukan peneliti berhasil menciptakan sebuah sistem informasi akademik siswa di SMKN 4 Payakumbuh. Hasil uji validitas yang dilakukan oleh ahli komputer produk ini mendapatkan nilai 0,89 yaitu sangat baik. Hasil uji praktis dilakukan oleh wakil kurikulum dengan nilai 1,0 yaitu sangat praktis. Dan hasil uji efektifitas dengan wali kelas dan siswa dengan nilai 0,98 yaitu sangat baik.
ANALISIS TUJUAN PEMBELAJARAN DENGAN KOMPETENSI DASAR PADA RENCANA PELAKSANAAN PEMBELAJARAN DASAR LISTRIK DAN ELEKTRONIKA DI SEKOLAH MENENGAH KEJURUAN
Authors: Budiastuti Pramudita , Soenarto Sunaryo , Muchlas Muchlas , Ramndani Hanafi Wahyu
Published: June 2021

ABSTRACT:This study aims to determine the conformity between learning objectives with basic competencies. This research is a document analysis research. The subject of this research is the lesson plan of electric power installation engineering teachers in basic electricity and electronics subjects in vocational high schools in Yogyakarta. Data collection used document observation sheets that were filled in by instructional design experts. Document observation sheets were validated through expert judgments and did the reliability test using Cohen Kappa. The data analysis technique used descriptive statistics. The results of the conformity between the design of learning objectives and basic competencies are classified according to the indicated percentage of mean value of 65.03%.ABSTRAK:Penelitian ini bertujuan untuk mengetahui keselarasan tujuan pembelajaran dengan kompetensi dasar. Penelitian ini merupakan penelitian analisis dokumen. Subjek penelitian ini adalah Rencana Pelaksanaan Pembelajaran (RPP) guru teknik instalasi tenaga listrik pada mata pelajaran dasar listrik dan elektronika SMK di Kota Yogyakarta. Pengumpulan data menggunakan lembar pengamatan dokumen yang diisi oleh ahli desain instruksional. Lembar pengamatan dokumen divalidasi melalui expert judgements dan reliabilitas diuji dengan Cohen Kappa. Teknik analisis data menggunakan statistik deskriptif. Hasil penelitian keselarasan desain tujuan pembelajaran dengan kompetensi dasar tergolong sesuai dengan penunjukkan persentase nilai rerata sebesar 65,03%.
BOOSTING STUDENTS’ EXCITEMENT DURING LONG ONLINE COURSE USING COMBINATION OF ONLINE COURSE PLATFORMS AND SOCIAL MEDIA BASED ASSIGNMENTS
Authors: Muhfizaturrahmah Muhfizaturrahmah , Hermaniar Yulieda , Mubaraq Yasyir F.
Published: June 2021

ABSTRACT:Months of online courses create students’ boredom leading to their decreasing involvement on teaching and learning process. This paper reports how social media based assignment such as Instagram, Whatsapp, and Youtube fills the void and bring back students’ courage to a better level during covid19 lockdown. This is a qualitative study using narrative approach which data was collected collaboratively during even semester of 2019 at English Courses of Department of Electrical Engineering Education Yogyakarta State University and Study Program of English Literature STKIP PGRI Banjarmasin. The data carried from multiple e-learning applications indicates that the more we adopt social media based assignment, the more students were engaged into the class activities and the higher level of involvement was observed.ABSTRAK:Pembelajaran online yang berlangsung selama berbulan-bulan memicu kebosanan peserta didik yang menyebabkan penurunan keikutsertaan mereka dalam proses belajar mengajar. Penelitian ini bertujuan untuk mengetahui bagaimana tugas berbasis media sosial seperti Instagram, Whatsapp, dan Youtube dapat mengisi kekosongan dan mengembalikan keberanian peserta didik menjadi lebih aktif selama lockdown covid19. Penelitian ini merupakan penelitian kualitatif dengan pendekatan naratif yang datanya dikumpulkan secara kolaboratif selama semester genap tahun 2019 pada mata kuliah Bahasa Inggris di Jurusan Pendidikan Teknik Elektro, Universitas Negeri Yogyakarta dan Program Studi Bahasa Inggris STKIP PGRI Banjarmasin. Data yang dihasilkan dari beberapa aplikasi e-learning menunjukkan bahwa semakin kita mengadopsi tugas berbasis media sosial, semakin banyak peserta didik yang terlibat dalam kegiatan kelas dan tingkat keikutsertaan menjadi lebih tinggi.
REPLIKA BENDA KERJA MENINGKATKAN AKTIVITAS PEMBELAJARAN PEKERJAAN DASAR ELEKTROMEKANIK DI SMKN 2 YOGYAKARTA
Authors: Lisningrum Endang Retno
Published: June 2021

ABSTRACT:The purpose of this study was to improve the learning outcomes of work materials from non-metallic materials in the subject of Basic Electromechanical Work (PDE). This research is a two-cycle Classroom Action Research, by implementing four actions in each cycle, namely: 1) planning, 2) action, 3) observation, and 4) reflection. The action used is to apply learning with the assignment method. The teacher gives assignments to students to carry out learning activities, then students present the results of the assignment. The learning outcomes of the first cycle, the activities and skills of students are still low, so that the learning outcomes are also low (below 50%). In cycle II learning outcomes, activities and skills experienced positive changes, namely student activity increased from 48% to 93%, while skills increased from 44% to 90%, so that learning outcomes also increased from 38% to 90%. 10% of students who are not yet competent because they do not enter and their health is disturbed. The results of the data analysis indicate that the PDE Practice learning activities by utilizing a replica of the workpiece using the assignment method can improve learning outcomes.ABSTRAK:Tujuan dari penelitian ini yaitu untuk meningkatkan hasil belajar materi pekerjaaan dari bahan non logam pada mata pelajaran Pekerjaan Dasar Elektromekanik (PDE). Studi ini merupakan Penelitian Tindakan Kelas dua siklus, dengan menerapkan empat Tindakan pada masing-masing siklus, yaitu: 1) perencanaan, 2) tindakan, 3) observasi, dan 4) refleksi. Tindakan yang digunakan yaitu dengan menerapkan pembelajaran menggunakan metode penugasan. Guru memberikan tugas kepada siswa untuk melakukan kegiatan belajar, kemudian siswa mempresentasikan hasil tugas tersebut. Hasil belajar siklus pertama, aktifitas dan ketrampilan siswa masih rendah, sehingga hasil belajar juga rendah (dibawah 50%). Hasil belajar siklus kedua, aktivitas dan keterampilan mengalami perubahan positif, yaitu aktifitas siswa naik dari 48% naik menjadi 93%, sedangkan ketrampilan naik dari 44% menjadi 90%, sehingga hasil belajar juga naik dari 38% menjadi 90%. 10% dari siswa yang belum kompeten dikarenakan tidak masuk serta terganggu kesehatannya. Hasil analisis data menunjukkan bahwa aktivitas pembelajaran Praktik PDE dengan pemanfaatan replika benda kerja menggunakan metode penugasan dapat meningkatkan hasil belajar.
Effect of Problem-Based Learning Model and Motivation toward Learning Outcomes on Network Routing
Authors: Ariyanti Kurnia Dwi , Mon Aye Aye , Ekohariadi Ekohariadi , Anifah Lilik
Published: June 2021

This study explored the effect of problem-based learning and motivation toward learning outcomes of the subject of computer routing network. Computer routing network is part of the subject of computer network design in a computer network engineering class. The purpose of this study was to examine the difference in learning outcomes between students treated with the problems based learning model and treated with direct learning model by considering students’ learning motivation. This study was categorized as quasi-experimental designed with a factorial experimental design. The sampling technique used purpose-sampling. The data were analyzed using a two-way Anava method. The results of the study showed that (1) the learning outcomes of students in the subject of routing network with problem-based learning model was better than the student treated with direct instruction learning, (2) based on the learning outcomes in the subject of routing network, a group of students with high motivation was better, and (3) there is an interaction between the application of problem-based-learning model and motivation to the students learning outcomes.
The Effect of Using Real-Object Media on the Students’ Interest in Cost Estimation Learning
Authors: Sitanggang Nathanael , Luthan Putri Lynna Adelinna , Jeumpa Kemala , Ma Hongbo
Published: June 2021

The rapid development of construction industry is fostering the construction service companies to hire sufficient and competent professional cost estimators who are mainly graduated from universities. This study aims to examine the students’ interest in contraction cost estimating and the effect of using real-object media and PowerPoints media in learning achievement of cost estimation. The method of this study was quasi-experimental conducted with a 2 x 2 factorial design using 40 samples. The instruments consisted of learning outcomes assesment and students’ interest testing with reliability coefficients of 0.92 and 0.81 respectively. The hypothesis was tested through variance analysis and Tukey test techniques. The research findings showed that there are interactions between the implementation of real object media and the students’ interests. For the students with high level of interest to learn, the implemetation of real object media did not give significant differences compared to the use of PowerPoints media. In the other hand, for the students with relatively low level of interest to learn, the real-object media is more effective than PowerPoints media. This finding is very useful for lecturers to improve learning achievement in cost estimation learning thus the graduates have the competence and expertise in the construction service industry.
The Effectiveness of Technology, Pedagogy and Content Knowledge (TPACK) in Learning
Authors: Absari Nalurita , Priyanto Priyanto , Muslikhin Muslikhin
Published: June 2021

The study examined the factors affected teachers' Technology, Pedagogy and Content Knowledge (TPACK). Those factors are Technology Knowledge (TK), Pedagogy Knowledge (PK), Content Knowledge (CK) and Technology Pedagogy Knowledge (TPK). Curriculum 2013 has been applying for 5 years. However, an evaluation of how does the teacher deliver learning subjects (pedagogy knowledge), and the implementation of subject mastery (content knowledge) and technology mastery (technology knowledge) is strongly suggested. The study was quantitative with an associative method involving 200 teachers in Salatiga region as samples drawn with simple random sampling. The results of the study showed that PK has a positive effect on TPACK, while TK and CK do not have a positive effect on TPACK. Furthermore, TK, TPK, PK have positive effects on TPK, and TPK has a positive effect on TPACK. This study also suggested that age influences the development of technological knowledge and if one of the knowledge is not possessed by a teacher, the learning process will achieve maximum outcomes.
AUTOC-AR: A Car Design and Specification as a Work Safety Guide Based on Augmented Reality Technology
Authors: Syahidi Aulia Akhrian , Subandi Subandi , Mohamed Amran
Published: June 2021

The development of Augmented Reality (AR) technology until now continues to increase. Utilization of AR has been used in various aspects of life, including aspects of education, is no exception for automotive engineering education. In recent years, a variety of ideas and the latest innovations about automotive by utilizing AR technology began to boom, especially in the area of car design aimed at car production companies. At the car production stage, human resources skilled in understanding the design and specifications of car features are required. The seeds of educated human resources start from vocational students in automotive engineering expertise programs. This study aims to develop and implement an application called AUTOC-AR that functions to help and facilitate students in learning automotive engineering skills in vocational schools and supporting safety in the workplace. The research methodology consisted of a literature review and excavation of problems and needs, solution recommendations, application development, testing, results and discussion, conclusions and future work. The Extreme Programming (XP) model was used as a development method. Marker-based tracking was used as a detection approach. As many as 25 students as end-users were involved to use AUTOC-AR. The result is that all features in the AUTOC-AR application function properly based on the expected specifications. Non-functional testing has been carried out by adopting a user experience approach with a final average value of 4.83 with a percentage of 96.6%.
The Link and Match between the Competency of Vocational High Schools Graduates and the Industry on CAD/ CAM and CNC
Authors: Wibisono Galih , Wijanarka Bernardus Sentot , Theophile Habanabakize
Published: June 2021

This study describes (1) the work process analysis of the production stage in the industry, (2) the required competency and skills of CAD/ CAM and CNC in the industry, (3) the implementation of the basic competency of CAD/ CAM and CNC in vocational high schools, (4) the link and match between the competency of vocational high schools graduates and the industry on CAD/ CAM and CNC. The descriptive-qualitative method was employed by involving 8 people from Mega Andalan Kalasan Ltd (MAK) and 5 people from vocational high schools. The data were collected through observation and interviews which were further analyzed descriptively. The findings indicate (1) the work process analysis map the competencies that must be owned by the workforce including CAD drafter, CAM programmer, and CNC operators in which each workforce involved 4 work process sequences, (2) the competency of CAD/ CAM and CNC described the knowledge and psychomotor activities. In detail, the activity of the CNC machine setting produced knowledge competence and the skills of 36.5% and 26.7% respectively. The operating CNC machine produced the knowledge competence and skills of 25.4% and 23.3% respectively. The 3D drawing and 2D CAD systems produced the knowledge competence and skills of 19% and 23.3% respectively, CAM Programming generated the knowledge competence and skills of 19% and 26.7% respectively, (3) the implementation of basic competencies can be categorized as good, (4) there are two competencies fulfilled the link and match between the vocational high schools' competencies and industry, namely manufacturing drawing competency with CAD as well as mechanical competency with CNC and CAM.
Interactive Multimedia Engine Management System (EMS) to Improve Prior Knowledge and Problems Solving Ability
Authors: Komarudin Komarudin , Mukhadis Ahmat
Published: June 2021

There are three problems in teaching engineering, especially in the field of electricity, those are: (1) students are unable to read electricity wiring; (2) students do not understand the basic concepts of electricity; (3) students do not understand the basic concept of the relationship between the electrical components. The purpose of this article are: (1) to describe multimedia, especially interactive multimedia engine management systems, prior knowledge, problem-solving; (2) to describe the relationship between interactive multimedia and prior knowledge; (3) to describe the relationship between interactive multimedia and problem solving; and (4) to provide the concept of interactive multimedia engine management system. The collection of information in this article uses a literature review or library research. Problem-solving is an attempt to solve problems through high-level thinking (high order thinking). Prior knowledge is the initial knowledge students have when entering topics with the same background. The existence of interactive multimedia or multimedia has a positive impact on prior knowledge. Some interactive multimedia research has a positive impact on the ability of problem-solving.
Education and Training for the Fourth Industrial Revolution
Authors: Spoettl Georg , Tūtlys Vidmantas
Published: June 2021

Within the context of the 4th Industrial Revolution as an overall paradigm change, organization and work processes must switch together with automation following and real-time control. This applies to the contents of labor and to the interaction and connection between human and technology. Up to this point, there are only a few empirical studies about how digitized, decentralized and closely connected production system with "Cyber-Physical-Systems" change the task and and competence profiles in the workplace. One outcome will be that intelligent workpieces will manage their way into production themselves. Depending on the implementation level of Industry 4.0 in companies, vocational education and training for the workforce is highly relevant and the vocational systems have to respond to the needs and expectations of the new technological challenges. Successful reactions of the vocational systems towards the 4th Industrial Revolution have to focus on curriculum development, teacher training and training of highly skilled workers. Approaches to fulfill these requirements will be discussed in this paper.
Upgrading Manual Turning Machine Towards IoT-Based Manufacturing
Authors: Sutopo Sutopo , Setiadi Bayu Rahmat , Hanzla Muhammad
Published: June 2021

Technological independence is one aspect of the challenges of the industrial revolution era 4.0. Digitalization, robotization, big data, internet of things (IoT), and efficiency of work processes require an update in technology. If everything is held in the fulfillment of practicum facilities, it will undoubtedly cost a prohibitive fee. Many of the tools and machines found in learning machining practices in Vocational High Schools (VHS) in Indonesia are still a conventional machine. This study provides a breakthrough solution in the effectiveness and efficiency of traditional machining of the lathe that starts with a preliminary identification of literature, selection according to inclusion and exclusion criteria, coding, themes classifications, and supplementary areas. Through the literature review methodology, this article has the main objective of identifying the needs in architecture and the need for supporting devices on conventional lathes based on the IoT as well as safe, comfortable, and modern work areas in lathe machining practices.