bluuebunny/crossref_metadata_2025 huggingface dataset:
Features of the technology of obtaining a propeller screw casting from BrAZHN bronze
Authors:   St. Petersburg State Marine Technical University, St. Petersburg, Russia, Korenchenkova D.E. , Polyakov N.А. ,   St. Petersburg State Marine Technical University, St. Petersburg, Russia
Published: February 2022

Peculiarities of propeller propeller castings production are considered with indication of unique properties and requirements. Shown is a diagram of a one-time sand mold for casting blades. All possible variants of the molding sand, inspection and acceptance of the cast blades are given. The measures for checking, accepting and inspecting the castings of propellers and blades are indicated. A full cycle of propeller screw casting technology is considered.
Investigation of the influence of fluorinated graphene on the regularities of behavior during sliding of steel Шх15 on a porous material based on iron
Authors:   Central Design Bureau of Mechanical Engineering, St. Petersburg, Russia, Kuzmin A.M , Chulkin S.G. ,   St. Petersburg State Marine Technical University, St. Petersburg, Russia, Breki A.D. ,   Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
Published: February 2022

This paper presents the results of a study of sliding friction of a porous iron-based material impregnated with a lubricating oil with dispersed particles of fluorinated graphene. Experimental results have been obtained showing that with an increase in the concentration of aggregates of fluorinated graphene flakes in the lubricating oil, the average force and coefficient of friction decrease, while a good antifriction effect is observed.
Information technologies in the preparation of shipbuilding production
Authors:   St. Petersburg State Marine Technical University, St. Petersburg, Russia, Polyakov N.A. , Chulkin S.G. ,   St. Petersburg State Marine Technical University, St. Petersburg, Russia
Published: February 2022

The paper considers the most important information technologies for production, as well as the main functions of the CCI. The authors compared the development paths of some CAD programs, their capabilities in combination with the engineering data support system and as part of 3D platforms. Given the characteristics of TPP in shipbuilding, as well as a trend towards the introduction and development of flexible manufacturing systems, the basic tasks that the design must ensure.
Features of mechanical fastening of cutting inserts to the tool body
Authors:   St. Petersburg State Marine Technical University, St. Petersburg, Russia, Shunevich V.A. , Zubarev Y.M. ,   St. Petersburg State Marine Technical University, St. Petersburg, Russia
Published: February 2022

The article discusses the features of the mechanical fastening of multifaceted cutting inserts to the tool body, presents the methods and structures of fastening, outlines the advantages and disadvantages of various fasteners and their application, lists the companies that produce these fasteners.
Investigation of the adhesive strength of polymers
Authors:   St. Petersburg State Marine Technical University, St. Petersburg, Russia, Stúckach A.V. , Dintcer A.I. ,   St. Petersburg State Marine Technical University, St. Petersburg, Russia
Published: February 2022

The paper deals with the issues of adhesive strength of polymers. The designs of samples for research are analyzed. The results of laboratory tests of the adhesive strength of polyamides P-54 and P-6/66-3 were obtained. The optimal heating temperature of the samples, which provides maximum adhesive strength, is determined.
Use of liquefied natural gas in the fleet
Authors:   St. Petersburg State Marine Technical University, St. Petersburg, Russia, Besedin S.N. , Vasileva K.V. ,   St. Petersburg State Marine Technical University, St. Petersburg, Russia
Published: February 2022

One of the main challenges associated with the development of the LNG market for the transport sector is to increase the number of vessels using LNG as fuel. The main technical issues in this area are related to the development and improvement of various types of CNG engines. Natural gas is used as a bunkering fuel mainly in a liquefied state, which is explained by the physicochemical properties of LNG, as well as the weight and dimensions of storage systems. Currently, there are a number of reasons why LNG will be increasingly used as a bunker fuel in water transport: environmental, economic, administrative and political, technic.
Prospects for the development of air-independent engines
Authors:   St. Petersburg State Marine Technical University, St. Petersburg, Russia, Dyadik A.N. , Yushkov A.V. ,   St. Petersburg State Marine Technical University, St. Petersburg, Russia
Published: February 2022

Аir-independent engines for submarines will soon replace diesel-electric ones. There is an ongoing development in this area in two directions. The article considers various types of аir-independent engines according to the main indicators and substantiates the choice of the most promising type of engine based on domestic and foreign experience.
Production, storage and transportation of liquefied natural gases
Authors:   St. Petersburg State Marine Technical University, St. Petersburg, Russia, Pavlovsky V.A. , Bogdanov A.V. ,   St. Petersburg State Marine Technical University, St. Petersburg
Published: February 2022

The article presents the basic information related to the production, storage and transportation of liquefied natural gas. Special attention was paid to the rollover phenomenon. Methods for utilizing LNG vapors were also considered.
The Palliative Care Knowledge Questionnaire-Basic (PCKQ-B): Development and Validation of a Tool to Measure Knowledge of Health Professionals about Palliative Care in India
Authors: Pruthi Megha , Bhatnagar Sushma , Indrayan Abhaya , Chanana Gaurav
Published: February 2022

Objectives:

A well-educated and aware staff are the needed to overcome barriers to palliative care provision in the face of ever-increasing needs of palliative care in developing countries like India. Lack of a standardised and locally validated need assessment tool is felt as one of the important requirements for any successful educational program. This project is to develop and validate a basic palliative care knowledge needs assessment questionnaire.

Materials and Methods:

Development of Palliative Care Knowledge Questionnaire-Basic (PCKQ-B) for Indian nurses working in a tertiary care hospital in Delhi-NCR, India was undertaken with four basic processes, that is, item generation, content validity, pilot testing and field testing. Literature search helped us to find appropriate domains and items; content validity obtained with a panel of seven experts, pilot testing and finally field testing was done on 102 nurses working in 6 branches of Max Super Specialty Hospital, Delhi-NCR, India. The field study data were used to do item analyses including item difficulty, item discrimination and calculate reliability indicators including test-retest correlation and KR-20.

Results:

Content Validity index (CVI) of all the items was >0.78 (except 1 item) and Scale-CVI was 0.98 (excellent content validity). Items were selected on the basis of item difficulty index of 0.1 to 0.9 and an item discrimination index greater than 0.2. A total of 25 questions were selected that elicited KR-20 value of 0.65 and intra class correlation (test-retest reliability) of 0.52.

Conclusion:

Overall, PCKQ-B is a 25 item questionnaire with a moderate reliability. Although validated for nurses in tertiary care hospitals, this tool might find utility in education of primary health workers, community health workers, social workers, or physiotherapists in palliative care teams.
OPTIMIZATION OF MANAGEMENT DECISIONS UNDER THE CONDITIONS OF ENTREPRENEURIAL RISK AND UNCERTAINTY
Authors:   Lviv Polytechnic National University, Tyrkalo Yuriy
Published: February 2022

Based on the study of theory and practice, the article reveals issues related to optimization of management decisions in conditions of entrepreneurial risk and uncertainty, as well as presents the relevant conclusions and proposals in this direction, in particular: optimization of management decisions in conditions of entrepreneurial risk and uncertainty includes the choice of methods and tools for regulating the degree of entrepreneurial risk, as well as economic evaluation of decisions in uncertainty – a set of methods and a system of appropriate techniques to reflect specific production situations in economic indicators of profitability, profitability, costs, unprofitable activities of the entrepreneurial structure.
Selected aspects of military logistics support to public administration in eliminating the effects of crisis situations. Possibilities of Using Engineering Troops in Crisis Situations
Authors: Zamiar Zenon , Kowalkowski Stanisław
Published: February 2022

Part I presented the characteristics of non-military crisis situations, including natural threats and technical failures, terrorist threats, hybrid activities and disturbance of public order. The specified crisis situations imply specific actions of the public administration, which carries out its mission on the basis of national and international legal regulations. However, the forces and resources of the civil administration are not always able to provide assistance to all victims of crisis situations, in accordance with the applicable procedures. The implementation of procedures for providing aid and liquidating the effects of crisis situations requires specific, logistically prepared forces and resources. The legal regulations introduced on the basis of experience make it possible to use military forces to provide logistical support to the administration in crisis situations. Hence, in the second part of the article, the authors focused on presenting and familiarizing the reader with the possibility of using the Armed Forces in logistic support of civil administration, with particular emphasis on engineering troops and their support components, prepared to eliminate the effects of crisis situations.
Communication of a leader
Authors: Szczepański Piotr , Kanik Tomasz
Published: February 2022

Effective communication is the most important skill a leader can have. It is thanks to her that he achieves his goals and is effective in action and influencing the environment. The article deals with the topic of skilful communication of a leader. The authors of the publication characterized the process of social communication aimed at causing the recipient of information to change the consciousness intended by the sender. Communication skills are presented as a trait of a leader, as well as trust in him as one of the most important conditions for its effectiveness. The personality trait of charisma was also discussed, thanks to which the person possessing it owes unquestionable authority in people and influence on them. It is often the most succinct way of describing the trait that distinguishes effective leaders from subordinates. In order to analyse the quality of communication in the managed team, the study contains sets of questions that should be answered by the leader. They contain questions to be asked when analysing the process of giving direction, analysing your level of empathy for feedback in the communication process and building team morale, and analysing the process of your leadership activity towards your team members. The publication also characterizes the performance of a leader in a multicultural environment and describes models of the leadership process.
Globalization and changes as determinants of logistics development
Authors: Kaśnikowska Barbara
Published: February 2022

The article deals with some phenomena of internationalization of economic and social processes, especially in the context of more and more complex supply processes. They got even more complicated during the pandemic. It was emphasized that a very serious situation forces the use of even unconventional solutions or the search for alternative ways to replace what has been strained by the emerging crisis. In a fairly extensive ending, the prospects for a supply chain strategy have been presented.
Kajian Spasial terhadap Potensi Pemanfaatan Jalur Pedestrian di Jalan Utama Kota Pontianak
Authors:   Program Studi Arsitektur Universitas Tanjungpura, Kota Pontianak, Purnomo Yudi , Wulandari Agustiah ,   Program Studi Perencanaan Wilayah dan Kota Universitas Tanjungpura, Kota Pontianak
Published: February 2022

Jalur pedestrian merupakan salah satu fasilitas bagi kegiatan atau pergerakan pejalan kaki. Pembangunan jalur pedestrian saat ini sedang dilaksanakan di sisi ruas jalan utama di Kota Pontianak. Pembangunan jalur pedestrian yang lebar, lengkap dengan atribut dan perabot dari sebuah fasilitas pejalan kaki, menjadi pemandangan baru di beberapa sudut kota. Kegiatan berjalan kaki di Kota Pontianak yang terletak di wilayah tropis khatulistiwa lembap menjadi tantangan tersendiri bagi keberhasilan pembangunan sebuah fasilitas pejalan kaki. Keberhasilan pembangunan akan dimaknai dengan tumbuhnya budaya berjalan kaki di fasilitas-fasilitas yang tersedia. Terdapat banyak faktor yang mempengaruhi keputusan bagi seseorang untuk memilih moda perjalanan, di antaranya adalah faktor waktu, kenyamanan, ketersediaan kendaraan bermotor dan pola tata guna lahan. Hal ini ditambah lagi oleh motivasi untuk melakukan kegiatan berjalan kaki, baik itu rekreatif, fungsional hingga yang pragmatis. Artikel ini bertujuan untuk menjelaskan potensi pemanfaatan jalur pedestrian di jalan utama Kota Pontianak, khususnya Jalan Ahmad Yani, dalam tinjauan teoritis spasial. Pembahasan menggunakan pendekatan kuasi kualitatif dengan menggunakan analisis spasial, yaitu radius perjalanan, street hits, dan walkscore. Perencanaan spasial yang heterogen dalam jarak jangkau pejalan kaki dan perencanaan lebar jalur pedestrian yang efektif dapat menjadi solusi peningkatan bangkitan pergerakan kawasan perkotaan di Kota Pontianak.
Eksplorasi Konsep Etnomatematika pada Alat Pertanian Tradisional Suku Bugis di Kabupaten Pinrang
Authors:   Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Sawerigading Makassar, Akbar Ady
Published: February 2022

Penelitian ini bertujuan untuk mengeksplorasi dan menganalisis konsep etnomatematika yang terkandung pada alat-alat pertanian tradisional suku Bugis di Kabupaten Pinrang. Metode yang digunakan dalam penelitian ini adalah metode eksploratif-deskriptif melalui pendekatan etnografi yang bertujuan untuk menggambarkan, menjelaskan dan menganalisis konsep-konsep matematika pada alat pertanian tradisional suku Bugis. Teknik pengumpulan data dilakukan melalui kajian literatur, observasi, wawancara, dan dokumentasi. Teknik analisis data yang digunakan adalah interactive model, yaitu reduksi data (data reduction), penyajian data (display data), dan penarikan kesimpulan (verifikasi). Pemeriksaan keabsahan data dilakukan dengan triangulasi sumber. Hasil penelitian menunjukkan bahwa terdapat konsep etnomatematika dalam alat-alat pertanian tradisional suku Bugis di Kabupaten Pinrang. Konsep etnomatematika yang dimaksud adalah: (1) Konsep bidang datar layang-layang terkandung dalam alat pertanian Teda’, (2) Konsep bidang datar persegi panjang terkandung dalam alat pertanian Passampa’, dan (3) Konsep bidang datar lingkaran terkandung dalam alat pertanian Pattapi. Konsep etnomatematika yang terkandung dalam sejumlah alat tradisional suku Bugis memiliki relevansi dengan konten pembelajaran matematika pada pendidikan formal sekolah dasar.
Microsoft Teams dalam Pembelajaran Matematika untuk Mewujudkan Merdeka Belajar
Authors:   Magister Pendidikan Matematika FKIP Universitas Tanjungpura, Pontianak, Sitorus Barita Riana
Published: February 2022

Tujuan penelitian ini adalah untuk mengeksplorasi manfaat Microsoft Teams dalam pembelajaran matematika. Matematika merupakan salah satu mata pelajaran sekolah yang membutuhkan keterampilan berpikir siswa. Hal ini didukung dengan adanya kebijakan merdeka belajar. Tujuan merdeka belajar tidak lain adalah agar siswa dan guru dapat memiliki kebebasan dalam berpikir dan berinovasi secara mandiri dan kreatif. Adapun salah satu media yang dapat menunjang merdeka belajar adalah Microsoft Teams yang pemanfaatannya membutuhkan koneksi internet. Microsoft Teams merupakan platform dari Office 365, yang di dalamnya memuat fitur-fitur yang dapat mendukung komunikasi dan kolaborasi siswa, antara lain video call conference, whiteboard interactive, kolaborasi dokumen real-time, dan lain sebagainya. Studi literatur dan pemberian angket digunakan untuk memperoleh data yang berkaitan dengan manfaat penggunaan Microsoft Teams dalam pembelajaran matematika. Adapun siswa yang menjadi subjek dalam penelitian ini adalah siswa kelas 7 di SMP Kristen Immanuel Pontianak. Data yang terkumpul kemudian dianalisis secara deskriptif. Hasilnya menunjukkan respon siswa yang baik terkait pemanfaatan Microsoft Teams dalam pembelajaran matematika. Siswa memberi respon senang, aktif dan tertarik selama proses pembelajaran berlangsung. Melalui penulisan ini, pendidik diharapkan dapat menggunakan Microsoft Teams dalam pembelajaran daring untuk mewujudkan merdeka belajar.
Pengembangan Bahan Ajar Ilmu Pengetahuan Sosial Ekonomi Sekolah Menegah Pertama di Daerah Tertinggal, Terdepan dan Terluar
Authors:   Universitas Negeri Semarang, Semarang, Soleh Soleh , Joko Joko ,   Universitas Negeri Semarang, Semarang, Andryan Andryan ,   Universitas Negeri Semarang, Semarang
Published: February 2022

Sekolah ini berada didaerah 3T. Sebanyak 28 siswa laki-laki dari sekolah tersebut adalah anak-anak nelayan. Nelayan melaut dari pukul 05:00 sampai dengan 13:00 sehingga anak-anak mereka tidak pergi ke sekolah di musim ke laut. Kepada siswa tersebut perlu diberikan bahan ajar yang dikembangkan dan atau disederhanakan sehingga lebih praktis untuk dibaca selama mengikuti orangtua mereka ke laut tersebut. Bahan ajar yang dihasilkan berbentuk komik yakni untaian cerita ekonomi dalam dunia nelayan yang dapat meningkatkan minat baca serta pemahaman anak-anak mengenai konsep yang ada. Cara mengembangkannya adalah menggunakan model pengembangan Borg & Gall. Hasilnya adalah anak-anak nelayan memahami konsep ekonomi lebih baik sewaktu menggunakan bahan ajar yang di kembangkan. Selain itu mereka dan para orangtua menerima bahwa bahan ajar tersebut bermanfaat. Bahwa bahan ajar tersebut cocok digunakan untuk anak nelayan khususnya di lokasi penelitian. Dan, bahan ajar tersebut masih dapat di kembangkan.
Aplikasi Metode Self-Potential untuk Mengamati Aliran Air Tanah di Jalan Perdana Kota Pontianak, Kalimantan Barat
Authors:   Program Studi Geofisika Universitas Tanjungpura, Muhardi Muhardi , Perdhana Radhitya ,   Program Studi Geofisika Universitas Tanjungpura, Kaharudin Kaharudin ,   Program Studi Geofisika Universitas Tanjungpura, Sirait Charles Billy ,   Program Studi Geofisika Universitas Tanjungpura, Jayanto Dwiki Nur ,   Program Studi Geofisika Universitas Tanjungpura, Soleh Muhammad ,   Program Studi Geofisika Universitas Tanjungpura, Aprilianti Peni ,   Program Studi Geofisika Universitas Tanjungpura, Eva Theresia ,   Program Studi Geofisika Universitas Tanjungpura
Published: February 2022

Penelitian ini bertujuan untuk mengidentifikasi aliran air tanah bawah permukaan di sekitar Jalan Perdana, Kelurahan Bansir Laut, Kota Pontianak. Pengamatan aliran air tanah berguna untuk mengetahui lokasi yang berpotensi terdapat air tanah. Penelitian ini menggunakan metode self- potential dengan mengaplikasikan 12 lintasan yang masing-masing mempunyai panjang 130 m. Jarak antar lintasan sejauh 10 m dan jarak antar elektroda porous pot adalah 10 m. Hasil penelitian menunjukkan bahwa variasi nilai potensial sebelum koreksi variasi harian yaitu -36.44 mV hingga 25.18 mV, sedangkan nilai potensial setelah koreksi variasi harian yaitu -36.64 mV hingga 25.86 mV. Nilai potensial relatif tinggi berada di bagian barat dan timur, sedangkan nilai potensial relatif rendah berada di bagian tengah dari lokasi penelitian. Hasil penelitian juga menunjukkan bahwa air tanah diduga mengalir dari arah barat dan timur menuju ke bagian tengah dari lokasi penelitian.
Pentingnya Laboratorium Penguji Terakreditasi di Perguruan Tinggi untuk Perolehan Data Terpercaya bagi Publik
Authors:   Universitas Tanjungpura, Destiarti Lia , Yuspriyanto Muhammad ,   Balai Riset dan Standardisasi Industri, Herman Mahmudi ,   UPTD Metrologi Legal, Dinas Koperasi, UKM, Perindustrian, dan Perdagangan Kabupaten Sambas, Alimuddin Andi Hairil ,   Universitas Tanjungpura, Wahyuni Nelly ,   Universitas Tanjungpura, Gusrizal Gusrizal ,   Universitas Tanjungpura
Published: February 2022

Laboratorium penguji terakreditasi adalah suatu laboratorium yang memenuhi persyaratan standar Standar Nasional Indonesia International Organization for Standardization/International Electrotechnical Commission (SNI ISO/IEC) 17025:2017. Kegiatan akreditasi merupakan pengakuan formal oleh Komite Akreditasi Nasional (KAN) bahwa laboratorium yang bersangkutan adalah kompeten. Pada kaitannya dengan unjuk kerja kompetensi, laboratorium juga mengikuti uji profisiensi dan pengujian bahan referensi. Uji ini akan membawa kepada ketertelusuran metrologi. Laboratorium Penguji di Perguruan Tinggi (PT) sudah memberikan pelayanan analisis kepada publik, memiliki kesiapan sarana prasarana dan sumber daya manusia. Laboratorium tersebut memiliki peran penting untuk menjadi laboratorium terakreditasi dan memberikan hasil pengujian yang dapat dipercaya. Laboratorium terakreditasi selain diakui kompetensinya akan mendatangkan keuntungan dalam bidang pemasaran sehingga pendapatan PT meningkat. Strategi PT untuk memperoleh pengakuan sebagai laboratorium terakreditasi dituliskan dalam makalah ini. Kerjasama PT dengan lembaga BSN juga menjadi sinergisitas yang baik dalam persiapan terbentuknya laboratorium akreditasi. Laboratorium terakreditasi pada suatu universitas juga dapat mengambil peran untuk mengusulkan rumusan SNI terkait produk unggulan lokal, sehingga bisa memberikan dampak positif bagi perkembangan produk daerah. Dengan demikian, dapat disimpulkan bahwa laboratorium pengujian terakreditasi memiliki peran penting untuk difasilitasi perwujudannya oleh PT.
Pola Dialog yang Terbentuk dalam Pembelajaran Fisika pada Materi Fluida Statis Melalui Transcript Based Lesson Analysis (TBLA)
Authors:   Pendidikan Fisika FKIP Universitas Tanjungpura, Pontianak, Wanni Nurul Vidiya , Oktavianty Erwina ,   Pendidikan Fisika FKIP Universitas Tanjungpura, Pontianak, Silitonga Haratua Tiur Maria ,   Pendidikan Fisika FKIP Universitas Tanjungpura, Pontianak, Fauzi Reva ,   SMA Negeri 3, Pontianak
Published: February 2022

The study was conducted to analyze the dialogue patterns of the physics learning process on static fluid material using Transcript Based Lesson Analysis (TBLA) in SMA Negeri 3 Pontianak. The study uses qualitative research methods in the form of descriptive research. The study used a purposive sampling technique to select the sample so that class XI IPA 5 was chosen with 38 students. The research instrument was an observation sheet (field notes). The technique of data collection was in the form of documentation and observation. The first data analysis was interpreting the learning process into a full verbal transcript obtained from audio and video recording, then analyzing the appropriate dialogue pattern. Based on the data analysis, the form of dialogue pattern learning in cycle 1 was a two-way communication pattern with a teacher speech average percentage of 7.70% and students’ speech average percentage of 7.70%, which indicated a balance between teachers and students. While in cycle 2, classically also used a two-way communication with a teacher speech average percentage of 8.34% and students’ speech average percentage of 8.33%. It indicated that the teacher and students are equally active. Then, in cycle 2, there was a three-way communication with a teacher's average percentage of 1.13% and students' speech average percentage of 1.74%. There was a reciprocal relationship between teachers and students, but students tend to be more active. The teacher can use the analytical method using Transcript Based Lesson Analysis (TBLA) to analyze teaching and learning processes in the classroom.
Fetal Congenital Heart Block
Authors:   Department of Physiology, College of Medicine, University of the Philippines, Philippines, CL Velayo , IC David ,   Section of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of the Philippines - Philippine General Hospital, Philippines
Published: February 2022

Objective: To report on the pathophysiology, diagnosis, and management of fetal congenital heart block. Design: Case series. Setting: University hospital. Patients: A 33-year old secundigravid with fetal congenital heart block secondary to structural heart disease; a 28-year old primigravid with isolated fetal congenital heart block secondary to maternal autoantibodies; and a 44- year old grand multipara with fetal congenital heart block, resolved. Interventions: Close fetal monitoring with cardiotocography, fetal wellbeing studies using ultrasonography with color Doppler velocimetry, and pacemaker insertion in the neonatal period. Main Outcome Measures: Cardiotocography and ultrasonography with Doppler revealed fetal congenital heart block. Further work-up involving autoantibody testing and fetal 2D-echocardiography revealed the underlying pathophysiology and classification of congenital heart block depending on the presence of structural heart anomalies or the existence of concomitant maternal disease. Results: The first two cases exemplified the different categories of congenital heart block: Case 1 illustrated heart block secondary to structural heart disease and Case 2 illustrated the isolated type secondary to maternal autoantibodies. Case 3 showed the typical clinical picture wherein no further progression but resolution of heart block symptoms occurred prenatally. Conclusions: This report emphasizes the importance of a high index of suspicion in the early diagnosis of fetal congenital heart block. Proper management for such cases entails close monitoring using available technology and not necessarily medical management in utero.
Lipomatous Hypertrophy of Interatrial Septum Presenting with Two Distinct Atrial Arrhythmias
Authors:   Department of Medicine, University of California - Irvine, USA, E Zargarian , ME Rochon-Duck ,   Division of Cardiology, Department of Medicine, University of California - Irvine, USA, DM Donaldson ,   Division of Cardiology, Department of Medicine, University of California - Irvine, USA
Published: February 2022

Lipomatous Hypertrophy of the Interatrial Septum (LHIS) is usually a benign condition, but it has been known to produce a variety of symptoms and arrhythmias. Management is guided by symptoms and can range from watchful waiting to surgical resection. Here we describe a unique case of a patient with LHIS associated with two distinct atrial arrhythmias. Due to persistent symptoms an EP study with ablation was pursued which resulted in abatement of symptoms. This case illustrates that an EP study and ablation is a viable option that could be considered in patients with continued symptoms in conjunction with medical or surgical options and ultimately lead to prompt diagnosis and appropriate treatment.
A consistent picture of phosphate–divalent cation binding from models with implicit and explicit electronic polarization
Authors: Puyo Julie , Juillé Marie , Hénin Jérôme , Clavaguéra Carine , Duboué-Dijon Elise
Published: February 2022

The binding of divalent cations to the ubiquitous phosphate group is essential for a number of key biological processes, such as DNA compaction, RNA folding or interaction of some proteins with membranes. Yet, probing their binding sites, modes and associated binding free energy is a challenge for both experiments and simulations. In simulations, standard force fields strongly overestimate the interaction between phosphate groups and divalent cations. Here, we examine how different strategies to include electronic polarization effects in force fields—implicitly through the use of scaled charges or pair-specific Lennard-Jones parameters, or explicitly with the polarizable force fields Drude and AMOEBA—capture the interaction of a model phosphate compound, dimethylphosphate, with calcium and magnesium divalent cations. We show that both implicit and explicit approaches, when carefully parametrized, are successful in capturing the overall binding free energy, and that common trends emerge from the comparison of different simulation approaches. Overall, the binding is very moderate, slightly weaker for Ca2+ than Mg2+, and the solvent-shared ion pair is the most stable. Our results thus suggest practical ways to capture the divalent cations with biomolecular phosphate groups in complex biochemical systems. In particular, the computational efficiency of implicit models makes them ideally suited for large-scale simulations of biological assemblies, with improved accuracy compared to state-of-the-art fixed-charge force fields.
Water Dipole Populations in the Electrical Double Layer and Their Contributions to the Total Interfacial Potential at Different Surface Charge Densities
Authors: Rehl Benjamin , Ma Emily , Parshotam Shyam , DeWalt-Kerian Emma L. , Liu Tianli , Geiger Franz M. , Gibbs Julianne M.
Published: February 2022

The electric double layer governs the processes of all charged surfaces in aqueous solutions, however elucidating the structure of the water molecules is challenging for even the most advanced spectroscopic techniques. Here, we present the individual Stern layer and diffuse layer OH stretching spectra at the silica/water interface in the presence of NaCl over a wide pH range using a combination of vibrational sum frequency generation and heterodyned second harmonic generation techniques, streaming potential measurements, and the maximum entropy method. We find that the Stern layer water molecules and diffuse layer water molecules respond differently to pH changes: unlike the diffuse layer, whose water molecules remain net-oriented in one direction, water molecules in the Stern layer flip their net orientation as the solution pH is reduced from basic to acidic. We obtain an experimental estimate of the dipole potential contribution to the total potential drop across the insulator/electrolyte interface and find it to dominate over the Coulomb-only (Gouy-Chapman, Gouy-Chapman-Stern) contribution. We quantify how these contributions result in a considerable influence on the vibrational lineshapes. Our findings show that a purely Coulombic view is insufficient to accurately describe the electrical double layer over aqueous interfaces.
Clases virtuales del idioma ingles en la Universidad de Guayaquil
Authors: Guerra Jaime Denisse Ofelia
Published: February 2022

La educación siempre será un tema que genere discusión y aporte en toda sociedad que pretenda cambiar. Cada sociedad tiene una lengua materna con la cual ejercer la necesidad de comunicación, sin embargo, en la historia contemporánea se ha hecho necesario propiciar un lenguaje universal para la globalización. Este idioma, es el inglés. Se trata de una investigación documental cualitativa, observacional descriptiva de corte transversal que estudia las distintas publicaciones académicas disponibles digitalmente, utilizando el motor de búsqueda de google académico se ha utilizado palabras claves como “aprendizaje virtual”, “aprendizaje del inglés”, y “educación virtual del idioma ingles en la Universidad de Guayaquil” para realizar una selección cualitativa de los trabajos relevantes para el tema, descartando aquellos que no se entrelacen en su exposición para componer una idea global de los elementos escogidos que conforman el objetivo de este trabajo. El proceso de educación virtual, no necesariamente del idioma inglés, sigue enfrentando resistencia al cambio, sin embargo, la atropellada transición a los formatos educativos virtuales o semi presenciales desatados por la pandemia de la COVID-19 ha dejado resultados positivos para emparejar las plataformas académicas aun estándar mínimo de uso de las TIC en los procesos formativos a todos los niveles. Hay una sensación, no probada, de que en efecto hay un aumento de interés en aprender el idioma, sería cuestión de diseñar ahora, elementos metodológicos que comprueben o rechacen las premisas que se puedan proponer al respecto. Desde el inicio del nuevo milenio el mundo ha tenido un avance vertiginoso en materia tecnológica, aun cuando apenas suceden 22 años de su inicio, los cambios en la tecnología trascienden la temporalidad, el ritmo no se mide en tiempos real sino en tiempo virtual. Los profesionales de hoy no tienen opción de quedarse rezagados. La necesidad de dominar el inglés se vuelve vital para permanecer y trascender en la vida laboral. Existe un nuevo idioma universal que se viene instaurando en el mundo, la advertencia es que la academia no puede permitirse más brechas entre la actualidad y la realidad, el lenguaje de programación digital existe, es imperioso medir el alcance y como adaptarse.
Análisis comparativo de los tipos de alcohol antisépticos utilizados en la ciudad de Guayaquil, para prevenir el COVID-19
Authors: Estupiñán Vera Galo Enrique , González Quiñónez Lissette Ariana
Published: February 2022

En 2020 la llegada del covid-19 puso al mundo en confinamiento total, perjudicando la economía y causando muerte a millones de personas. Las empresas comercializaban productos para prevenir el virus. Es por eso que en el presente trabajo de titulación se pretende evaluar mediante un estudio comparativo diferentes tipos de Alcoholes Antisépticos usados en Guayaquil para la prevención del covid-19 y sus variantes. Las comparaciones se la realizaron en el laboratorio acreditado “Cromanova” donde se analizó la concentración de alcohol en Gay- Lussac (Gl) y en masa (%), concluyendo que los seis tipos de alcoholes cumplen con los parámetros establecidos por la OMS, también se realizó el análisis de varianza el cual se determinó que la concentración más efectiva fue la de Gay-Lussac a diferencia que la concentración en masa. Posteriormente se propuso realizar una feria informativa para disminuir contagios por covid-19 y el número de infectados en hospitales.
Analisis Kemampuan Pemecahan Masalah Matematis Siswa SMP Berdasarkan Langkah IDEAL Problem Solving Ditinjau dari Gaya Belajar Siswa
Authors: Ad Dien Ni'mah Nur Faidah , Rasiman Rasiman , Aini Aurora Nur
Published: February 2022

Setiap siswa memiliki kemampuan pemecahan masalah yang berbeda beda. Perbedaan itu disebabkan oleh banyak faktor dan variabel salah satunya adalah gaya belajar siswa. Tujuan dari penelitian ini adalah untuk mendeskripsikan kemampuan pemecahan masalah matematis siswa untuk setiap gaya belajar berdasarkan langkah IDEAL Problem Solving, mengetahui klasifikasi dari gaya belajar siswa di kelas VIII SMP Islam Hidayatullah. Penelitian ini merupakan penelitian deskriptif kualitatif. Subjek pada penelitian ini yaitu seluruh siswa kelas VIII SMP Islam Hidayatullah, dengan menggunakan purposive sampling terpilih tiga subjek peneltian yang terdiri dari 1 siswa dengan gaya belajar visual, 1 siswa dengan gaya belajar auditori, 1 siswa dengan gaya belajar kinestetik. Dalam penelitian ini data yang diperoleh melalui hasil angket, tes tertulis, wawancara dan dokumentasi. Hasil yang diperoleh dalam penelitian ini berdasarkan analisis data yaitu subjek dengan gaya belajar visual dan auditori mampu memecahkan masalah dengan menggunakan lima langkah IDEAL Problem Solving dengan baik dan benar. Sedangkan pada subjek dengan gaya belajar kinestetik, dapat memecahkan masalah dengan menggunakan lima langkah IDEAL Problem Solving dengan baik, namun hasil yang diperoleh oleh subjek kurang tepat. Dari hasil penelitian ini dapat disimpulkan bahwa siswa dengan gaya belajar visual, auditori, dan kinestetik dapat memecahkan masalah dengan menggunakan lima langkah IDEAL Problem Solving, namun siswa pada gaya belajar kinestetik belum memperoleh hasil yang tepat.
Profil Kesalahan Siswa Berdasarkan Newman’s Error Analysis (NEA) dalam Menyelesaikan Soal Cerita Matematika Ditinjau dari Gaya Belajar Siswa
Authors: Sulistyoningrum Eko , Kartinah Kartinah , Sudargo Sudargo
Published: February 2022

Penelitian ini bertujuan untuk mendeskripsikan profil kesalahan siswa berdasarkan Newman’s Error Analysis dalam menyelesaikan soal cerita matematika ditinjau dari gaya belajar siswa. Jenis penelitian ini adalah penelitian kualitatif deskriptif. Penelitian ini dilaksanakan di SMP Negeri 1 Weleri tahun ajaran 2020/2021. Subyek dalam penelitian ini adalah siswa kelas VIII A dengan rincian 1 siswa dengan gaya belajar visual, 1 siswa dengan gaya belajar auditorial dan 1 siswa dengan gaya belajar kinestetik. Pengumpulan data dilakukan dengan memberikan angket gaya belajar,  soal cerita dan wawancara. Identifikasi kesalahan siswa berdasarkan Newman diklasifikasikan kedalam 5 jenis yaitu reading error, comprehension error, transformation error, process skill error, encoding error. Berdasarkan hasil analisis data diperoleh kesimpulan bahwa siswa dengan gaya belajar visual melakukan kesalahan pada tahap transformation, siswa dengan gaya belajar auditorial melakukan kesalahan pada tahap transformation, process skill dan encoding; siswa dengan gaya belajar kinestetik melakukan kesalahan pada tahap comprehension, transformation, process skill dan encoding. Faktor penyebab siswa melakukan kesalahan juga berbeda-beda.
Efektivitas Model Pembelajaran Means Ends Analysis (MEA) dan Creative Problem Solving (CPS) Berbantu E-Modul terhadap Kemampuan Berfikir Kritis Matematis Siswa Kelas VIII SMP Negeri 2 Mranggen pada Materi Sistem Koordinat
Authors: Nurfarida Akhdian Dwi , Buchori Achmad , Dwijayanti Ida
Published: February 2022

Tujuan penelitian ini adalah untuk mengetahui (1) Apakah terdapat perbedaan efektivitas antara model pembelajaran MEA berbantu E-Modul, model pembelajaran CPS berbantu E-Modul dengan model pembelajaran konvensional terhadap kemampuan berpikir kritis siswa. (2) Apakah model pembelajaran MEA berbantu E-Modul lebih efektif dari pada model pembelajaran konvensional terhadap kemampuan berpikir kritis siswa. (3) Apakah model pembelajaran CPS berbantu E-Modul lebih efektif dari pada model pembelajaran konvensional terhadap kemampuan berpikir kritis siswa. (4) Apakah kemampuan berpikir kritis matematis siswa yang menggunakan model pembelajaran MEA berbantu E-Modul mencapai tuntas secara klasikal maupun individual. (5) Apakah kemampuan berpikir kritis matematis siswa yang menggunakan model pembelajaran CPS berbantu E-Modul mencapai tuntas secara klasikal maupun individual. (6) Apakah terdapat pengaruh keaktifan terhadap kemampuan berpikir kritis matematis siswa yang menggunakan model pembelajaran MEA berbantu E-Modul dan CPS berbantu E-Modul. Teknik pengambilan sampel yang digunakan adalah cluster random sampling sehingga terpilih kelas VIII E sebagai kelas eksperimen 1, kelas VIII F  sebagai kelas eksperimen 2, dan kelas VIII G sebagai kelas kontrol. Teknik pengumpulan data yang digunakan adalah observasi (pengamatan), dokumentasi dan tes. Hasil analisis diperoleh bahwa ketiga kelas berdistribusi normal, homogen dan hipotesis 1 untuk anava diperoleh F_hitung>F_tabel yaitu 23,9 > 3,12 itu artinya ada perbedaan efektivitas antara ketiga model pembelajaran. Pada hipotesis 2, 3 diperoleh Fhitung < Ftabel yaitu 0,42 < 6,24 maka kemampuan berpikir kritis kelas eksperimen 1 sama dengan kemampuan berpikir kritis kelas eksperimen 2. Pada hipotesis 4 dan 5 diperoleh t_hitung>t_tabel yaitu 12,61647 > 1,71088 maka siswa kelas eksperimen 1 tuntas secara individual, dikatakan tuntasan belajar klasikal sebesar 96%, dan untuk eksperimen 2 diperoleh t_hitung>t_tabel yaitu 13,71877 > 1,71088 dikatakan tuntasan belajar klasikal sebesar 100%. Pada hipotesis 6 diperoleh presentase 16,70% dan 53,12% artinya pengaruh antara keaktifan kemampuan berpikir kritis matematis terhadap kedua model. Dari hasil penelitian disimpulkan bahwa pembelajaran yang menggunakan model pembelajaran MEA dan CPS berbantu E-Modul lebih efektif dari pada model pembelajaran konvensional terhadap kemampuan berpikir kritis matematis siswa.
Pengembangan Game Edukasi Matematika dengan Pendekatan Etnomatematika Lawang Sewu Kota Semarang
Authors: Setiawan Bambang , Handayanto Agung , Buchori Achmad
Published: February 2022

Penelitian ini bertujuan untuk mengembangkan, mencari kevalidan serta kepraktisan game edukasi matematika dengan pendekatan etnomatematika berbantu app inventor dengan mengetahui langkah-langkah dalam pembuatan game edukasi matematika sampai produk siap digunakan. Metode penelitian ini adalah Research and Development (R&D) yang berorientasi pada pembuatan produk yaitu game edukasi matematika berupa aplikasi android dengan konten Lawang Sewu. Proses pembuatan dimulai dari menganalisis kebutuhan peserta didik kemudian membuat rancangan desain awal dan isi game tersebut sesuai dengan konten etnomatematika Lawang Sewu berbantu canva sebagai media desain  background dan App inventor sebagai pembuat aplikasi game. Game divalidasi oleh validator ahli media dan validator ahli materi mendapatkan hasil kelayakan produk sebesar 88,8% untuk ahli media dan 85% untuk ahli materi sehingga produk layak dan valid untuk digunakan. Berdasarkan angket kelayakan produk oleh siswa mendapatkan hasil  sebesar 92,77% sehingga produk praktis digunakan dalam pembelajaran dan bisa disebarluaskan.
Analisis Kemampuan Berpikir Kreatif Siswa Dalam Menyelesaikan Soal Matematika Ditinjau Dari Self-Regulated Learning
Authors: Rahmawati Ambar , Muhtarom Muhtarom , Wulandari Dewi
Published: February 2022

Penelitian ini bertujuan untuk mengetahui kemampuan berpikir kreatif siswa dalam menyelesaikan soal matematika ditinjau dari self-regulated learning. Metode yang digunakan adalah diskriptif kualitatif. Subjek yang diambil adalah tiga siswa kelas XI TB1 SMKN 1 Kalinyamatan dengan tingkat self-regulated learning tinggi, sedang, dan rendah. Hasil penelitian ini menunjukkan bahwa subjek dengan self-regulated learning tinggi memenuhi semua indikator berpikir kreatif, yaitu fluency, flexibility, originality, dan elaboration; subjek dengan self-regulated learning sedang memenuhi tiga indikator berpikir kreatif, yaitu flexibility, originality, dan elaboration; subjek dengan self-regulated learning rendah memenuhi dua indikator berpikir kreatif, yaitu flexibility dan originality.
HIPPOLYTUS OF ROME: A COMPREHENSIVE ANALYSIS OF THE INTERPRETATION OF DAN. 8
Authors: Kuryliak Ihor
Published: February 2022

The article is devoted to a comprehensive analysis of the interpretation of Hippolytus of Rome (170-235 AD) of Dan. 8 of the book of Daniel. The hermeneutic principles of the theologian in the interpretation of apocalyptic symbols of Dan. 8 are presented and showed their specifics. It has been found that Hippolytus first interpreted the symbol of the "little horn" (Dan. 8:9-12) as Antiochus IV Epiphanes among early Christian writers. This interpretation is followed today by the Preterist and Futurist schools of interpretation. The arguments of both the supporters of Hippolytus' interpretation and his opponents are highlighted. It is established that the theologian's interpretation, according to which the small horn in Dan. 8 symbolizes Antiochus Epiphanes has weaknesses and contradicts the biblical context of the apocalyptic symbols of both the eighth chapter and the entire book of Daniel. It is investigated that the arguments of the historicistl school allow us to conclude that the small horn in Dan. 8 symbolizes Rome. Promising for the future continuation of the study is seen in a deep exegetical study of the apocalyptic symbols of Dan. 8 and the influence of Hippolytus' interpretation on the hermeneutics of later Christian theologians.Key words: Book of Daniel, Hippolytus of Rome, hermeneutics, Antiochus IV Epiphanes, the small horn, exegesis, apocalyptic literature, eschatology.
PEDAGOGICAL CONDITIONS OF IMPLEMENTATION OF METHODICAL BASIS FOR FORMATION OF PERFORMING STABILITY OF MUSIC MASTERS IN THE PROCESS OF VOCAL TRAINING
Authors: Weiwei Xu
Published: February 2022

The author theoretically justifies and concretizes the methodological foundations of formation of performance stability of master students of musical art, as well as defines the pedagogical conditions as appropriate methodological guidelines for effective implementation of these principles. The pedagogical conditions as defined by the author are based on such principles of vocal training process organization as the principle of consistency, consistency and continuity in performing activity production, and the principle of crosscutting use and strategic planning of educational vocal-performance activity. The specificity of organization of pedagogical conditions for the formation of performance stability in master students consists in the accumulation of positive experience of vocal performance in the process of vocal training. The implementation of the mentioned principles is carried out by involving various, both traditional and non-traditional forms of vocal and singing activities. Crosscutting application of traditional and non-traditional forms of vocal performance in the process of vocal training enables Master students to master practical knowledge, skills and abilities of vocal performance; this creates basis for fundamental preparation of vocal-pedagogical repertoire necessary for stable performance of vocal compositions.Key words: Masters of Music, performing stability, methodological foundations, pedagogical conditions, principles of vocal training organization, positive experience of vocal performance, traditional and non-traditional forms of vocal performance activity.
Analisis yuridis pengelompokan wilayah pada notaris berkaitan norma perhitungan penghasilan neto terkait pejabat umum
Authors: Rachmatullah Amanda Puteri , Anshari Tunggul , Wisnuwardhani Diah Aju
Published: February 2022

The NPPN regulations in PER DIRJEN PAJAK Number 17 / PJ / 2015 state that the NPPN percentage is grouped by region. Where this grouping of regions causes a difference in the percentage between regional groups. In addition, regulations regarding regional grouping are also found in PERMENKUMHAM Number 27/2016 which divides regional categories for the position of notaries. For the purpose of this research, this type of normative legal research uses a statute approach where the legal materials in this study are analyzed using prescriptive analysis techniques. Based on the results of the author's research, it can be concluded that the NPPN grouping by region is one of the manifestations of the Equality principle where this principle provides the same treatment to people who are in the same condition. The sentence is in the same condition can be interpreted as being in the same regional characteristics which are based on considerations using several variables. Broadly speaking, there is a correlation between the regional grouping of the two regulations, which lies in the basic factor for determining regional grouping, that is regional economic growth. The regional grouping that is regulated in the two rules has also fulfilled the value of justice as proposed by Aristotle's theory of justice. Regional grouping which is regulated by the government has clear and firm reasons so that this grouping is not a discriminatory act but is a form of distributive justice.How to cite item: Rachmatullah, A., Anshari, T., Wisnuwardhani, D. (2021). Analisis yuridis pengelompokan wilayah pada notaris berkaitan norma perhitungan penghasilan neto terkait pejabat umum. Jurnal Cakrawala Hukum, 12(2), 129-138. doi:https://doi.org/10.26905/idjch.v12i2.5811