bluuebunny/crossref_metadata_2025 huggingface dataset:
Model of development of the regional system of medical, psychological and pedagogical assistance to infants with hearing impairment
Authors:   Saint Petersburg Research Institute of Ear, Throat, Nose and Speech,  Saint Petersburg, 190013, Russia, Koroleva I. V. ,   Center of the Pediatric Audiology,  Saint Petersburg, 194356, Russia, Tufatulin G. Sh. ,   Center of the Pediatric Audiology,  Saint Petersburg, 194356, Russia,   Mechnikov North-Western State Medical University,  Saint Petersburg, 191015, Russia, Korkunova M. S. ,   Center of the Pediatric Audiology,  Saint Petersburg, 194356, Russia
Published: March 2021

The study provides an analysis of medical and psychological and pedagogical assistance to children with hearing impairment at an early age in St. Petersburg in accordance with the modern standard «1-3-6». It was found that only 19% of children with hearing impairment registered at the Audiology Center were diagnosed with hearing loss before the age of 3 months, at the age of 6 months. 5,4% of children had hearing aids. A model for the development of a system of comprehensive care for young children with hearing impairment in St. Petersburg has been developed. The model includes 5 stages, for each of which a system of organizational measures is presented, aimed at improving the effectiveness of comprehensive care using a family-centered approach. The implementation of the model made it possible to increase the proportion of children diagnosed before the age of 3 months and to reduce the average age of hearing aid in young children. Expansion of the range of services in the Audiology Center (a course of classes on adapting a child to hearing aids during primary hearing aids, group deaf pedagogical and musical classes with children and parents, a school for parents, parental counseling by a psychologist), as well as the introduction of remote forms of support contributed to an increase in the competence of parents in matters of hearing aids, development of infant with hearing loss and parental activity in the classroom with the child. Remote forms of work made it possible to continue the rehabilitation of children during the COVID-19 pandemic. The developed model for the development of comprehensive care for young children with hearing impairment and their families may be useful for other regions of the Russian Federation.
Comparative analysis of use of triamcinolone and placebo in treatment of persistent allergic rhinitis
Authors:   Heratsi Yerevan State Medical University, Yerevan, 0025, Armenia, Nazanyan A. Kh. , Manasyan S. L. ,   Erebuni Medical Center, Yerevan, 0087, Armenia, Avakyan A. A. ,   Erebuni Medical Center, Yerevan, 0087, Armenia, Shukuryan A. K. ,   Heratsi Yerevan State Medical University, Yerevan, 0025, Armenia
Published: March 2021

The aim of the study was to determine the effect of triamcinolone monotherapy on the quality of life of patients with persistent allergic rhinitis. The study was placebo-controlled, randomized and double-blinded. The study included 46 patients in the study group and 24 patients in the control group, all were diagnosed with persistent allergic rhinitis for at least two years. Patients were examined twice after diagnosis was made. The study group was administered intramuscularly with 40 mg of triamcinolone once, while the control group was given placebo. To estimate the quality of life in both groups, a specially designed questionnaire was used, according to which the final scores were calculated. The triamcinolone group had a lower overall score on the questionnaire compared with the placebo group (p < 0.001). The difference between the scores at the beginning of the study and at the end of the first month for all indicators was statistically significant (p < 0,001). The difference in changes from the start of the study to the end of the first month (difference in treatment) between placebo and the study groups was statistically significant, in favour of the study group. Triamcinolone is a drug that improves the quality of life of patients treated for persistent allergic rhinitis, better than placebo.
Regeneration of ciliated epithelium of nasal cavity in normal conditions and after surgery
Authors:   Georgievsky Medical Academy of the Federal State Autonomous Educational Institution,  Vernadsky Crimean Federal University,  Simferopol, 295051, Russia, Zavalii M. A. , Orel A. N. ,   Georgievsky Medical Academy of the Federal State Autonomous Educational Institution,  Vernadsky Crimean Federal University,  Simferopol, 295051, Russia, Krylova T. A. ,   Georgievsky Medical Academy of the Federal State Autonomous Educational Institution,  Vernadsky Crimean Federal University,  Simferopol, 295051, Russia, Balabantsev A. G. ,   Georgievsky Medical Academy of the Federal State Autonomous Educational Institution,  Vernadsky Crimean Federal University,  Simferopol, 295051, Russia, Kushnirek P. A. ,   Georgievsky Medical Academy of the Federal State Autonomous Educational Institution,  Vernadsky Crimean Federal University,  Simferopol, 295051, Russia
Published: March 2021

The problem of postoperative management of patients after surgical interventions on intranasal structures is still actual. Statistically the frequency of nasal pathology that required surgical correction is on rise. These facts stimulate to make an analysis of wound healing processes of nasal mucosa and triggers that influence on these processes. In this paper morphological and functional changes of nasal mucosa during different pathological conditions are observed. The wound healing is regulated on different levels and one of the most significant role some tissue and cells mediators are played. The effects of transforming growth factor beta (TGF-b) and matrix metalloproteinases (MMP) on nasal mucosa regeneration are shown based on literature search. Possibility of correction of these substances for better and faster restoring of nasal mucosa after intranasal surgery is discussed.
Case report of von willebrand disease after tonsillotomy and adenotomy in a child
Authors:   Kutfitdinov Sughd Regional Clinical Hospital, Khujand, 735700, Tajikistan, Makhmudov S. S. , Ochilzoda A. A. ,   Kutfitdinov Sughd Regional Clinical Hospital, Khujand, 735700, Tajikistan, Dzhamolov F. P. ,   Kutfitdinov Sughd Regional Clinical Hospital, Khujand, 735700, Tajikistan, Mutalibov A. Z. ,   Kutfitdinov Sughd Regional Clinical Hospital, Khujand, 735700, Tajikistan, Bobodzhanov R. U. ,   Kutfitdinov Sughd Regional Clinical Hospital, Khujand, 735700, Tajikistan, Maksudov B. A. ,   Kutfitdinov Sughd Regional Clinical Hospital, Khujand, 735700, Tajikistan, Gafarov A. A. ,   Kutfitdinov Sughd Regional Clinical Hospital, Khujand, 735700, Tajikistan
Published: March 2021

The authors present a clinical case of von Willebrand disease detected after tonsillotomy and adenotomy in a child. The peculiarity of this observation lies in the rare occurrence of von Willebrand disease in clinical practice, as well as the manifestation of the clinical manifestations of this pathology against the background of surgical treatment in a child.
HEMATOLOGIA DE TILÁPIAS CONSUMINDO DIETA CONTENDO PALMA E PROBIÓTICO
Authors: Dos Santos Keisyara Bonfim
Published: March 2021

O objetivo do trabalho foi avaliar a inclusão de níveis crescentes de Saccharomyces boulardii na dieta, sobre os parâmetros hematológicos de tilápia do Nilo alimentadas com ração suplementada com palma. Pós-larvas de tilápia (1,8 ± 0,20 g) foram distribuídas aleatoriamente em 16 hapas (54 l) acondicionadas em quatro caixas de água (1000 l) numa densidade de 20 peixes/hapa. O delineamento utilizado foi em blocos casualizados com 4 tratamentos e 4 repetições, sendo os níveis de inclusão do probiótico liofilizado de: T1(tratamento1): 0; T2 1,25; T3 2,5 e T4 5 mg/kg em ração de 42% de proteína bruta contendo 11% de farelo de palma. As análises estatísticas foram realizadas com o auxílio do software SAS. Após 45 dias, 3 peixes de cada unidade experimental foram capturados aleatoriamente para coleta de 0,5 ml de sangue para determinação das varáveis leucocitárias, trombócitos e glicose. O T1 promoveu maior número de neutrófilos. T2 e T3 apresentaram mesmo resultado para todas as variáveis leucocitárias. T4 promoveu diminuição do percentual de trombócitos e aumento de linfócitos. A suplementação de 2,5 mg/kg apresentou menor nível de glicose. A inclusão de 5 mg/kg de levedura pode ser feita em dietas para tilápias do Nilo contendo palma.
BIOLOGIA REPRODUTIVA DE PEIXE COELHO SAPATEIRO, Siganus sutor (VALENCIENNES, 1835) EM CABO DELGADO, NORTE DE MOÇAMBIQUE
Authors: Machaieie Sidónio Paulino Raúl
Published: March 2021

O peixe coelho sapateiro Siganus sutor é um dos recursos pesqueiros mais importante das pescarias artesanais em Cabo Delgado. No entanto, a legislação pesqueira em vigor não tem qualquer regulamentação da pesca desta espécie. O estudo da biologia reprodutiva desta espécie é importante na medida em que permite determinar medidas de conservação visando à manutenção dos estoques pesqueiros da espécie Siganus sutor. O presente estudo teve como objetivo determinar os aspetos da ecologia reprodutiva do Siganus sutor em Cabo Delgado. Foram coletados 724 indivíduos provenientes da pesca artesanal entre agosto de 2018 a julho de 2019. No laboratório procedeu-se a triagem dos dados biométricos (peso com 5 g de precisão e comprimento com precisão de 1 mm) de cada indivíduo. Posteriormente, os estágios das gonadas foram observados macroscopicamente usando uma escala de desenvolvimento, de imaturo ao desovado/aspermo baseado de critérios morfológicos. A proporção sexual para o período do estudo foi de 1,5 fêmeas para cada 1 macho. A primeira maturação foi de 187,01 mm de comprimento total para fêmeas e de 201,73 mm para machos. O período com maior proporção de peixes com gonadas maturas foi de abril a agosto. Perante este cenário, para manutenção das populações desta espécie, são sugeridas medidas de gestão que garantem a reprodução da espécie durante os meses de abril a agosto, a definição do tamanho mínimo de captura de 202 mm para fêmeas e machos.

Palavras-chave: Siganus sutor; reprodução; pesca artesanal; oceano índico ocidental; gestão pesqueira.
Research on the impact of enriched learning environment on cognitive activity of students
Authors:   Krasnoyarsk State Medical University n.a. Prof. V.F. Voyno-Yasenetsky, Shilin N.G. , Shapiro L.A. , Salmin V.V.
Published: March 2021

Discussed is effectiveness of specially created enriched (educational) environment impact on memory indicators and learning outcomes of the 1st year students of Krasnoyarsk State Medical University n.a. Prof. V.F. Voino-Yasenetsky in medical and biological physics during classroom training. At the first stage of the study, all students underwent computer testing to determine indicators of general memory and memory of object details recognition, gender differences (MST-version 0.96). At the second stage, results of testing were compared in control groups (n = 32), where classes were held according to the traditional method, and in experimental groups (n = 34), where classes were conducted with elements of the enriched learning environment. The study used the traditional version of MST (Mnemonic Similarity Task), results of the study were processed in the Statistica 6.1 software (StatSoft, Russia). The data distribution was checked for normality using the Shapiro-Wilk test. Test results in two independent groups were compared using the Mann-Whitney test. Frequency analysis was carried out according to Fisher’s exact test (two-sided version). The authors have proven that the use of elements of the enriched learning environment in the classroom improves concentration of students’ attention, increasing the efficiency of separating details of presented objects by 21% and the performance indicators of 41% of students. Obtained average indicators of the share of correct answers (73.4%) and efficiency of separating details of objects (38.4%) correspond to the data obtained in literature for this age category of young people.
Devolution processes and the theory of historical development by S. Sanderson
Authors:   Novosibirsk State University, Verkhoturov A.V. , Obukhov A.A.
Published: March 2021

Analyzed is one of the most comprehensive modern approaches to the problem of the existence of evolution of human society as such and of specific human communities, i.e. “General Theory of Historical Development” by American historian and sociologist Stephen Sanderson. While agreeing, in general, with its main ideas, we believe that it is important to note that the issue of existence of individual communities demonstrating devolution (regression to an earlier historical state), stagnation or degeneration at certain historical stages is practically ignored in the framework of the theory under consideration. This creates its vulnerability in the face of specific empirical data, indicating a deviation from the evolutionary trend. We believe that overcoming this theoretical difficulty is possible in the process of comprehending the theory of S. Sanderson in the context of ideas of the world-system approach of Immanuel Wallerstein. We want to show that examples of devolution, stagnation and degeneration of societies do not deny general progressive evolutionary tendencies, characteristic for the world-system as a whole, but only indicate the transition of a particular society to a lower level within the world-system (from the core to the semi-periphery, or from the semi-periphery to the periphery).
Problems and perspectives of digitalization of education in Kyrgyzstan
Authors:   International University of Kirgiz Republic, Narkoziev A.K.
Published: March 2021

Researched is the problem of digitalization of education in the Republic of Kirgizstan. In Kirgizstan, despite the fact that the world has already been tied to digital technologies for a long time, the year of 2019 was declared the Year of Regional Development and digitalization of the country. However, at the same time, transition to a digital environment is noted as not fast enough. The article provides an assessment for current state and development trends of the modern higher education system, identifies problems of transition of universities in Kyrgyzstan towards digital educational environment. The purpose of this article is to analyze prospects of development and prospects in implementation of digital educational technologies, as well as to define differences between distance learning and online learning. Research in the problem is based on experience of organizing educational process and assessing its quality in various national systems of higher education, that was accumulated in International university of Kirgiz Republic.
St. Petersburg Summit of the «Group of Twenty»
Authors: Smyslov D.
Published: March 2021

«The Group of Twenty» is an informal forum for international cooperation between the leading developed states, the largest developing countries and emerging market economies. The article explores the key strategic approaches and governance decisions related to the main directions of international macroeconomic and financial regulation elaborated during the Russian chairmanship in the G-20 (December 2012 – December 2013) which culminated in the St. Petersburg summit. The author makes attempt to estimate viability of discussed approaches and decisions against the background of the actual problems of global economy. The author pays special attention to the St. Petersburg summit’s approaches to the problems of providing favorable conditions for strong and sustainable economic growth and of addressing unemployment. The point is how to achieve an acceptable compromise between the purposes of fiscal and monetary policies, on the one part, and providing balanced state budgets, as well as price stability, on the other part. Also, the importance of a wide range of radical structural reforms is stressed. The author argues that Russia proposed to vital themes to discuss at G-20 summit: long-term financing for investment as a foundation for economic growth and improvement of public debt management practices. The article describes the principal provisions of the Declaration and the Action plan related to various aspects of the reconstruction of financial and monetary system, including: tackling tax avoidance; implementing the Basel-3 standards, dealing with the adequacy of the bank’s capital; ending «too big to fail» problem; reforming over-the-counter (OTC) derivatives market; reducing reliance on the credit rating agencies; addressing potential risks for financial stability posed by the shadow banking; increasing financial inclusion, financial education and strengthening financial consumer protection; eliminating the international misbalances through broad based rebalancing of global demand; resisting of all forms of protectionism and promoting liberalization of global trade and investment; moving towards exchange rate flexibility to avoid persistent exchange rate misalignment; transforming the International Monetary Fund and Financial Stability Board. The author points to significant achievements of G-20 as a coordinating body for economic crisis management and, at the same time, discloses obstacles complicating its activities and development.
Impact of Globalization on Small Countries' Higher Education Systems: The Case of the Netherlands
Authors: Nevskaya A.
Published: March 2021

The article deals with the current performance and the latest developments of higher education in small and medium Western European countries. It uncovers the core trends on the international higher education market, defines small countries’ place and role in it. It is argued that there is no direct correlation between the size of economy, country’s geography, language spoken, on the one hand, and the share of international enrolments and higher education system’s general performance, on the other hand. However, there are some special moments about the way small developed countries build in their higher education in the global market. The article deals with the Dutch higher education system as a typical case for Western European small countries. It is concluded that the most beneficial category of students for this country are those from non-EEA countries, focusing in several specific areas of the country’s international specialization. A system of measures is being taken to attract such students and to prevent huge number of enrolments from the rest of developing world. This is the way the Netherlands preserve and improve the excellent quality of domestic educational services (which is right for the rest of small Western European countries as well). The group of countries under consideration is also known for their high level of involvement in all kinds of international cooperation in tertiary education. This allows them, on one hand, to further improve the quality of services, and, on the other hand, to minimize the costs of stuff needed for research and innovation. This paper’s findings might be used for further research in this area and taken into consideration by the local authorities dealing with Russian educational system improvement and including it in the global market of education, research and innovation.
World Leading Commercial Banks in Crude Oil Derivatives Market
Authors: Maslennikov A.
Published: March 2021

The article examines recent developments in the global market for crude oil futures contracts. Amid persistently high trading volume of futures contracts for Brent and WTI global oil benchmarks structure of the market has recently changed profoundly. Share of non-commercial investors who are not directly linked to physical oil operations and are often considered speculators in the trade turnover of futures contracts for WTI at the NYMEX exchange has exceeded 50%. Financial investors play a prominent role in price discovery process for crude oil. However, world leading commercial banks that used to be the major participants in crude oil futures market and were also actively engaged into physical oil trading operations presently are forced to adjust their strategies responding to the regulatory reforms unleashed in the USA and European Union after the global financial crisis of 2008/2009. Provisions of Dodd-Frank Act in the USA and similar regulations in the European Union member countries aim to limit banks’ involvement in commodity derivatives market exclusively to hedging activities referred to swap transactions between banks and their clients. New tighter regulation substantially increases costs of commodity derivatives’ business for commercial banks. Also, the current US legislation prohibits banks from proprietary trading with derivatives instruments. These legislative innovations could substantially reduce banks’ profits. The largest global commercial banks have already reduced their physical commodity trading activities. The author concludes that while it is still unclear how significant the retreat of banks from crude oil derivatives market will be, the established mechanism of oil price setting is unlikely to change dramatically as new players from the financial sector are entering the market, replacing commercial banks.
Tooth-billed Bowerbirds Scenopoeetes dentirostris select leaves of an introduced species as a novel court ornament following major habitat disturbance
Authors: Grant J.D.A. , Bailey C. , Morris C.
Published: March 2021

Following major forest disturbance by Cyclone Larry in 2006, Tooth-billed Bowerbirds Scenopoeetes dentirostris commonly used leaves of the introduced Wild Tobacco Solanum mauritianum as court ornaments, whereas these leaves were very rarely used beforehand. Their use continued for up to 12 years, declining in parallel with their availability. Leaf traits considered likely to influence ornament choice (e.g. size, brightness, retention of colour) were investigated for tobacco and other commonly used plant species, but none of these traits clearly accounted for the patterns of leaf choice. Nor did observations support a cultural basis for leaf choice, with birds in widely separated groups using tobacco leaves. Observed longer-term shifts in leaf choice and the availability/use data lead to the suggestion that the increased abundance of tobacco plants after the cyclone may have triggered the use of its leaves as a ‘novel’ resource.
Application of Problem Based Learning (PBL) Model to Improve Higher Order Thinking Skills (HOTS)
Authors: Firda Firda , Hadiwijaya Rizki , Nugraha Fajar
Published: March 2021

This research was motivated by the low level of high-order thinking skills of students on the material of human respiratory organs at SDN Cibungbun, Tasikmalaya Regency, of 27 students only 9 students who completed getting high-order thinking skills scores, with very high criteria of 5 people, high criteria of 2 people. and the criteria are enough for 2 people. Based on this, the researcher applied the Problem Based Learning (PBL) learning model. This study used a Classroom Action Research (CAR) model. Data collection obtained through tests, observation, and documentation. The results obtained: 1) The application of the Problem Based Learning model increases Higher Order Thinking Skills. The results of the value of teacher activity in the first cycle increased from 78% in the good category, and in the second cycle to 93% in the very good category. 2) Increasing the results of students' higher order thinking skills. The results of students' high-order thinking skills in pre-cycle 63, then in cycle I with an average value of 72, while in cycle II with an average value of 83. The results of research on teacher activity, student activity, and results of Higher Order Thinking Skills have changed towards a better direction, it can be concluded that the use of the PBL learning model can increase Higher Order Thinking Skills in class V SDN Cibungbun, Rajapolah District.
School Development Plan in SD IT Al-Ihsan Baleendah Bandung
Authors: Asy’ari Lutfi , Nurseha Alamsyah , Muslihah Neni Nadiroti , Mutaqin Ejen Jenal
Published: March 2021

Planning is carried out not only to solve the problems at hand, but also to plan ahead in terms of improving school performance or to anticipate changes and demands of the times. In general, schools prioritize physical development, even though non-physical development is much more important, because one of the main goals of schools is to produce quality students. Planning can be distinguished based on the time period, including long-term planning, medium-term planning, and short-term planning. In this regard, strategic planning plays an important role in achieving the targets of education providers in the midst of competition. The focus of this research is the school development plan at SDIT Al-Ihsan Baleendah. This study aims to capture the school development plan carried out by SDIT Al-Ihsan Baleendah. This type of research is a qualitative descriptive study. In the data collection technique, various techniques were used in this study, namely interviews, observation and documentation. The data analysis procedure used in this study was qualitative analysis. Based on the findings from the research results, it was concluded that development planning at SDIT Al-Ihsan Baleendah was carried out with the baseline analysis stage, forming a vision and mission, translating it into strategic planning and operational plans.
APLIKASI ANALISIS KEANDALAN PADA KEKUATAN PELAT FLOATING STORAGE OFFLOADING (FSO) DENGAN MEMAKAI SIMULASI MONTE CARLO
Authors: Ladesi Vivian Karim
Published: March 2021

Analisis keandalan akhir-akhir ini semakin banyak yang menggunakanya seiring dengan perkembangan ilmu pengetahuan dan teknologi. Bukan saja diaplikasikan pada bidang statistik yang menjadi induknya tetapi juga diberbagai bidang terutama pada analisis struktur yang erat hubungannya dengan peramalan dan analisa resiko. Floating Storage Offloading (FSO) merupakan struktur terapung di lautan seperti kapal tanker yang berfungsi untuk melakukan bongkar muat minyak. Dengan keberadaan FSO di lingkungan laut di mana tingkat ketidak pastian yang begitu tinggi maka analisis keandalan merupakan faktor penting yang seharusnya dilakukan. Dengan bantuan metode simulasi Monte Carlo maka analisis ini dapat dilakuan. Analisa Monte Carlo akan memberikan hasil yang dapat dijadikan rekomendasi dalam menganalisa kekuatan FSO. Metodologi yang dipakai untuk melakukan analisa ini adalah mengumpulkan data, menetapkan ambang batas keselamatan, menentukan karasteristik peubah dasar, dan kemudian melakukan simulasi Monte Carlo. Dengan demikian maka sesungguhnya analisis keandalan ini dapat diterapkan pada tahap-tahap perancangan dan perencanaan  FOS atau kapal-kapal lain.
STUDI PEMANFAATAN SERAT IJUK SEBAGAI BAHAN TAMBAH TERHADAP MUTU BATA BETON KARAWANG (ROSTER)
Authors: Septiandini Erna , Sulaiman Dede
Published: March 2021

Penelitian ini bertujuan untuk mengetahui perbedaan mutu bata beton karawang (roster) yang menggunakan serat ijuk sebagai bahan tambah dengan persentase 2%, 4%, 6% dan 8% dari berat semen terhadap mutu BBK 10 bata beton karawang (roster) Standar Nasional Indonesia (SNI 03-1570-1989).Pelaksanaan kegiatan penelitian dilakukan di laboratorium Balai Bahan dan Barang Teknik Dinas Perindustrian dan Perdagangan Propinsi DKI Jakarta di Jl. Let.jen Suprapto Cempaka Putih, Jakarta. Pembuatan benda uji dilakukan di Pabrik buis beton Aneka Alam di Cipondoh Raya, Tangerang-Banten. Waktu Penelitian dilaksanakan dari bulan November â€“ Januari 2005. Metode penelitian ini menggunakan metode eksperimen yang mengacu pada SNI 03-1570-1989. Jumlah benda uji seluruhnya ada 40 buah dari 4 perlakuan, masing-masing kelompok perlakuan ada 10 buah dengan perbandingan 1 : 6 dan serat ijuk sebesar 2%, 4%, 6% dan 8% terhadap berat semen, dengan perincian 5 buah untuk pengujan kuat tekan dan 5 buah untuk pengujian daya serap. Setiap benda uji akan dilakukan pengujan kuat tekan dan daya serap. Data yang diperoleh dianalisa dengan menggunakan analisa varians dan diuji t rata-rata satu pihak dengan taraf signifikan (ï¡) = 0,01. Hasil penelitian ini didapat bahwa penggunaan bahan tambah serat ijuk tidak dapat dijadikan sebagai bahan tambah pada pembuatan roster, dan tidak dapat menghasilkan mutu roster kelas BBK 10 menurut SNI 03-1570-1989.
STUDI PENGGUNAAN ABU BATU SEBAGAI BAHAN SUBTITUSI PASIR PADA PEMBUATAN GENTENG BETON TERHADAP KUAT LENTUR GENTENG BETON
Authors: Hamidi Hendri Dunant , S.Pd Elmarini
Published: March 2021

Tujuan penelitian ini adalah untuk mengetahui nilai kekuatan beton pentile dengan menggunakan abu batu sebagai bahan substitusi pasir pada derajat persentasi 0%, 5%, 10% dan 15%. Penelitian ini dilakukan di Balai Penelitian Bahan Industri di Jl. Membiarkan. Jend. Suprapto dan pembuatan concre partile congrete dilakukan di PD. Pabrik Patria di Jl. Narogong Raya Bantar Gebang Bekasi dari Februari hingga April 2002. Dengan menggunakan metode eksperimen, ada empat perlakuan substitusi yaitu 0%, 5%, 10% dan 5%, ada potongan-potongan pentil yang digunakan untuk setiap perlakuan, sepuluh untuk uji difraksi kekuatan dan lima untuk tes penyerapan air. Hasil penelitian menunjukkan bahwa beton pentile tipe A (0%) memiliki kekuatan difraksi 197 kg / cm2 dengan serapan air 9,24% pada avarange: tipe B (5%) memiliki kekuatan difraksi 201 kg / cm2 dengan serapan air 9,25% pada rata-rata. : Tipe C (10%) kekuatan difraksi 187 kg / cm2 dengan 11,02% absoprsi air pada averange: Tipe D (15%) memiliki kekuatan difraksi 172 kg / cm2 dengan penyerapan air 14,10 di averange. Data penelitian diuji dengan uji statif dengan ï¡ = 0,01 satu ekor, analisis varian. Berdasarkan analisis kami abstain thitung = 21,59 yang lebih besar dari ttabel = 4,38. Ho berada di area penyesalan. Jadi, ada perbedaan yang signifikan pada substitusi abu batu dengan nilai konkret spekulatif beton pada 10% substitusi. Singkatnya, dapat disimpulkan bahwa semakin tinggi penyajian abu batu yang digunakan, semakin rendah kekuatan pentile beton.
STUDI MUTU BATA BETON (PAVING BLOCK) YANG MENGGUNAKAN ABU PUING UBIN KERAMIK SEBAGAI BAHAN PENGGANTI SEBAGIAN SEMEN
Authors: Septiandini Erna , Sofiah Ariana
Published: March 2021

Penelitian ini bertujuan untuk mengetahui apakah mutu bata beton (paving block) dengan abu puing ubin keramik sebagai bahan pengganti sebagian semen dengan persentase 15%, 20%, 25%, dan 30% dari berat semen dapat memenuhi mutu bata beton (paving block) standar nasional (SNI 03-0691-1996).Benda uji paving block menggunakan komposisi campuran 1(semen+abu puong keramik) : 4 pasir berukuran 20cm x 10cm x 6cm. Pengujian yang dilakukan terhadap paving block adalah kuat tekan, daya serap air dan ketahanan aus berdasarkan SNI 03-0691-1996.Dari hasil pengujian hipotesis dengan uji t didapat bahwa penggunaan abu puing keramik sebesar 15% dari berat semen menghasilkan nilai kuat tekan rata-rata 23,336 MPa, lebih tinggi dari kuat tekan bata beton mutu B standar SNI 03-0691-1996 (20 MPa), sedangkan penggunaan abu puing keramik sebesar 20% dan 25% menghasilkan kuat tekan di atas kuat tekan mutu C standar SNI (15 MPa) dan penggunaan abu puing keramik sebesar 30% dari berat semen masih termasuk dalam kuat tekan standar mutu C SNI. Hasil uji untuk nilai rata-rata penyerapan air lebih tinggi (belum memenuhi persyaratan) dari standar SNI 03-0691-1996 mutu D(10%). Nilai rata-rata ketahanan aus paving block semakin tinggi jika persentase penggunaan abu puing keramik semakin besar. Hanya penggunaan sebesar 15% dari berat semen yang nilai rata-rata ketahanan ausnya lebih rendah dari nilai rata-rata ketahanan aus standar SNI mutu D (0,219 mm/menit)
INSTALASI PENGOLAHAN AIR LIMBAH INDUSTRI KECIL PENCUCIAN TEKTIL
Authors: Tiara Putri Nur , Sr Daryati , Astuti Sri Wahyuning
Published: March 2021

Perencanaan ini dimaksudkan untuk memperoleh hasil perhitungan dimensi yang manaDiperlukan untuk Instalasi Pengolahan Air Limbah untuk Pencucian Tekstil di IndonesiaIndustri Kecil di Kecamatan Sukabumi Selatan, sedangkan sistem yang tepatyang akan digunakan adalah biofilter anaerob-aerob.Dalam perencanaan ini, ada 3 industri pencuci jeans yang termasuk dalam hal inipenelitian regional. Dari hasil analisis laboratorium yang berlebihanmempengaruhi parameter berdasarkan tolok ukur kualitas sebagaimana diatur dalam KEP-51 / MENLH / 10/1995 adalah sebagai berikut: BOD5 = 574 mg / l; COD = 1,181,82 mg / l;dan TSS = 238 mg / l. Unit pemrosesan yang digunakan dalam reservoir pembagi pasir,reservoir pemerataan, reservoir sedimen kimia (koagulasi), anaerobaerobreaktor biofilter, waduk kontrol dan waduk pengeringan lumpur adalah:BOD5 = 85 mg / l; COD = 250 mg / l; TSS = 60 mg / l. Data limbah adalah:BOD5 = 44,74 mg / l; COD = 103,11 mg / l; TSS = 43,87 mg / l.Dari hasil perencanaan, dimensi bangunan diperoleh sebagai berikut: pasirreservoir pembagi 5 mx 3,5 mx 3,5 m; pemerataan 2,7 mx 1,3 mx 2,5 m;reservoir sedimen kimia (koagulasi) 0,5 mx 0,5 mx 0,5 m; anaerobaerobreaktor biofilter 2,6 mx 1,5 mx 3,8 m; lumpur penampung lumpur 5,5 mx5,5 mx 5,5 m dan waduk kontrol 1,5 mx 1,5 mx 1,5 m.
PENGGUNAAN PUING BETON UNTUK LAPIS PERKERASAN JALAN
Authors: Sr Daryati
Published: March 2021

Penelitian ini bertujuan untuk mengetahui nilai CBR bahan lapis pondasi atasyang menggunakan material dengan memanfaatkan limbah puing beton darisisa benda uji crushing test. Penelitian ini juga bertujuan untuk mengetahuiapakah nilai CBR bahan lapis pondasi atas dengan menggunakan bahan puingbeton dapat memenuhi nilai CBR standar Bina Marga.Penelitian ini menggunakan metode eksperimen, populasi dalampenelitian ini adalah lapis pondasi atas jalan. Sampel yang digunakan adalahbenda uji dari bahan puing beton.Nilai CBR diperoleh dari uji CBR laboratorium.Dari hasil analisa data dapat disimpulkan bahwa nilai CBR bahan lapispondasi atas dengan menggunakan puing beton lebih rendah dari nilai CBRstandar Bina Marga.
PERENCANAAN DAUR ULANG AIR LIMBAH NON KAKUS PADA PUSAT PERBELANJAAN PLAZA SLIPI JAYA
Authors: S Jumiah , Simbolon LT , Saleh Rosmawita
Published: March 2021

Perencanaan ini bertujuan untuk menentukan teknologi daur ulang air limbah dan mendapatkanhasil perhitungan dimensi dari instalasi daur ulang air limbah non kakus pada Plaza Slipi Jaya.Teknik perencanaan berpedoman pada teori yang ada dan hasil penelitian yang pernahdilakukan oleh Warjiyo, ST dan Amalia, S.Pd dengan judul â€œ Instalasi Pengolahan Air LimbahRumah Tangga Non Kakus untuk Keperluan MCK pada Daerah yang Mengalami Kekeringan Air.Debit air hasil daur ulang di Plaza Slipi Jaya sebesar 70,1 m3/hari. Daur ulang ini dapatmengurangi penggunaan air PDAM sebesar 47,69%. Dimensi Instalasi Daur Ulang Air LimbahNon Kakus
PERBANDINGAN MUTU ANTARA MORTAR PASANGAN BATA KOMPOSISI 1 KAPUR : 2 SEMEN MERAH : 3 PASIR DENGAN MORTAR PASANGAN BATA KOMPOSISI 1 SEMEN PORTLAND : 4 PASIR
Authors: Fajriana Maya , ST Prihantono , Nasution Nira
Published: March 2021

Tujuan penelitian ini adalah untuk mengetahui perbandingan kualitas(kekuatan tekan dan kekuatan geser) antara mortar dengan komposisi1 Lime: 2 Red Cement: 3 Sand dan mortar dengan komposisi 1 PortlandSemen: 4 Pasir untuk pasangan bata.Penelitian ini berlangsung di Aula Laboratorium Bahan dan Barang TeknisDinas Perindustrian dan Perdagangan DKI Jakarta, Jalan Letjen SupraptoCempaka Putih, Jakarta Pusat. Penelitian ini dilakukan selama bulan Desember2006 hingga April 2007.Metode penelitian ini adalah eksperimen, populasi sampel yang diujiadalah 60pcs, yang merupakan 30pcs untuk uji kuat tekan dan 30pcs untuk geseruji kekuatan. Sampel yang diambil untuk analisis adalah 40pcs, yang 20 pcs untuk kompresiuji kekuatan, dan 20 pcs untuk uji kekuatan geser. Metode pengambilan sampel adalah ametode yang dipilih secara acak sederhana.Hasil pengujian untuk mortar dengan komposisi 1 Kapur: 2 Red Cement: 3 Sandmenghasilkan kekuatan tekan rata-rata 7,59 Mpa dan kekuatan geser rata-rata0,18 Mpa, adukan semen dengan komposisi 1 Portland Cement: 4 Sandmenghasilkan kuat tekan rata-rata 32,34 Mpa dan kekuatan geser rata-rata0,45 Mpa.Hasil dari penelitian ini adalah bahwa mortar dengan komposisi 1 Kapur: 2 MerahSemen: 3 Pasir memiliki kekuatan tekan dan geser yang lebih rendah dibandingkan denganmortar dengan komposisi 1 Portland Cement: 4 Sand.
PENGGUNAAN PUING BETON DAN KAPUR SEBAGAI LAPIS PERKERASAN PONDASI ATAS (BASE COURSE) JALAN
Authors: Idrus Mohamad , Sr Daryati , Nasution Nira
Published: March 2021

Penelitian ini bertujuan untuk mengetahui perbedaan nilai CBR material base course yang digunakanbahan dengan memanfaatkan limbah puing beton dari sisa uji uji menghancurkan obyekdan kapur dengan variasi penambahan kapur sama dengan 0%, 10%, 12,5% dan 15%. IniPenelitian juga bertujuan untuk mengetahuinya, lakukan kursus dasar material CBR dengan menggunakan betonbahan puing-puing dan kapur dapat sesuai dengan nilai standar CBR Bina Marga samahingga 80%.Penelitian ini menggunakan metode eksperimen, populasi dalam penelitian ini adalah bahanjalan dasar. Sampel adalah uji objek dari bahan puing beton danjeruk nipis dengan variasi campuran kapur 0%, 10%, 12,5%, 15%. Setiap Variasi adalah 4contoh uji. Nilai CBR diperoleh dari uji laboratorium CBR.Dari hasil analisis data disimpulkan bahwa ada perbedaan yang signifikan setiapvariasi campuran bahan puing beton dan kapur. Hasil uji t menyatakanbahwa nilai material CBR dari base course dengan menggunakan puing beton dan kapur lebih besardari nilai standar CBR Bina Marga (80%)Kesimpulan dari penelitian ini adalah penggunaan serpihan beton dan kapur denganvariasi puing beton 85% dan kapur 15% menghasilkan nilai CBR tingkat yang lebih tinggi dariNilai CBR Bina Marga (80%)
Aspectos físicos de la cuenca del río Magdalena, Colombia: geología, hidrología, sedimentos, conectividad, ecosistemas acuáticos e implicaciones para la Biota
Authors: Restrepo Juan D. , Cárdenas-Rozo Andrés , Panuagua-Arroyave Juan F, , Jiménez-Segura Luz
Published: March 2021

La cuenca del río Magdalena es el sistema fluvial más representativo del norte de los Andes. Su historia está ligada al levantamiento de las cordilleras Central y Oriental. Presenta una precipitación promedio de 2.150 mm/año. Tiene un caudal de 7.154 m3 s-1, transporta cerca de 180 M ton de sedimentos al año 2015, para una producción de 710 ton/km2/año, lo que lo clasifica entre los 10 primeros ríos con mayor tasa de erosión a nivel global. Muestra una diversidad geomorfológica importante, con regiones de generación de sedimentos en las pendientes de las cordilleras y con áreas de transporte y sedimentación, como la planicie inundable de la Depresión Momposina, el abanico fluvial más extenso de los Andes del norte. En la última década, la cuenca del Magdalena ha experimentado un incremento en las tasas de erosión del 34 %, debido en gran parte a la degradación ambiental y a los niveles de deforestación de más del 70% en los últimos 50 años, con impactos en las zonas inundables y costeras, con pérdidas del área de humedales > al 80% y de biota y servicios ecosistémicos en ciénagas y zonas costeras, incluyendo la Ciénaga Grande, la bahía de Cartagena y los arrecifes coralinos de Islas del Rosario. Más del 90 % de su cuenca no se conoce científicamente en relación con la evolución de canales, zonas de inundación y de otros ambientes fluviales.
Diversidad de peces de la cuenca del río Magdalena
Authors: García-Alzate Carlos , DoNascimiento Carlos , Villa-Navarro Francisco A. , García-Melo Jorge E. , Herrera-R. Guido
Published: March 2021

El conocimiento de la ictiofauna de la cuenca del Magdalena-Cauca es el más sólido y extensamente consolidado en la actualidad, en contraste con las restantes cuencas hidrográficas del territorio colombiano, producto de una dinámica de investigación enfocada en su mayoría en esta región del país, al constituirse en el principal eje de desarrollo económico. Paralelamente, este último escenario ha resultado también en una mayor intervención antrópica de la cuenca y de su biota. No obstante, persisten importantes vacíos de información en el inventario taxonómico de la misma, así como de la distribución geográfica de las especies; y consecuentemente, sobre los patrones derivados de riqueza, endemismo y diversidad. Se presenta aquí la lista de las especies nativas válidas para el Magdalena-Cauca, acompañada de un análisis de su distribución geográfica, tomando como referencia la regionalización hidrográfica propuesta por el IDEAM. Se reconocen 233 especies que corresponden al 14,5% de la diversidad de peces dulceacuícolas de Colombia, agrupadas en siete órdenes y 33 familias. El 68% de las especies son endémicas del Magdalena-Cauca y 75 especies están restringidas a una única subcuenca o sección dentro de la misma. La sección del Medio Magdalena se distingue por reunir la mayor riqueza y número de especies endémicas únicas, mientras que la sección del Bajo-Medio Cauca fue la más disímil. La orogénesis de las cordilleras, incursiones marinas y dispersión entre cuencas, a través de capturas de cabeceras, son los procesos que han sido recientemente postulados para explicar este patrón biogeográfico heterogéneo dentro de la cuenca.
Ecología e historias de vida de los peces en la cuenca del río Magdalena, Colombia
Authors: Jiménez-Segura Luz , Herrera-Pérez Juliana , Valencia-Rodríguez Daniela , Castaño-Tenorio Isaí , López-Casas Silvia , Ríos María I. , Rondón-Martínez Yesid , Rivera-Koley Kelly , Morales Jenny , Arboleda María F. , Muñoz-Duque Sebastián , Atencio Víctor , Galeano-Moreno Andrés , Valvuena Rubén , Escobar Jorge , Ospina-Pabón Juan , García-Melo Luis E- , Gualtero Diana , Alonso Juan C. , Restrepo-Santamaría Daniel
Published: March 2021

La elevación en los Andes es un factor definitivo en la estructura de los ensamblajes de peces y los ecosistemas en que habitan. Los ensamblajes en el río Magdalena se estructuran mediante la interacción entre el tipo de ecosistema, la elevación y el ciclo de lluvias. En este capítulo se analiza la información ecológica disponible en diferentes fuentes sobre los peces del río Magdalena y se presentan algunas características de los ensamblajes de peces. La mayor riqueza de especies se encuentra en las zonas bajas de la cuenca del río Magdalena y, en particular, en los ecosistemas de corrientes (ríos y quebradas); mientras que la mayor diferencia en la composición de especies entre cuerpos de agua se observa en las zonas arriba de los 1.600 m s.n.m. Esta característica les confiere particularidades a los ensamblajes en términos de la riqueza de especies en cada uno de los gremios tróficos, de las estrategias de vida y de los nichos funcionales en los que se estructuran los patrones de la ictiofauna en los Andes nor-occidentales. En la cuenca se reconocen cuatro grandes gremios tróficos: carnívoros, detritívoros, omnívoros y planctófagos. El gremio de los carnívoros es el más rico en especies. La estrategia de vida más diversa en esta cuenca andina es la oportunista. Estas características en la riqueza de especies por ecosistema, por gremio trófico y por estrategia de vida, causa que el ensamblaje del río Magdalena finalmente se estructure en 25 nichos funcionales y, de nuevo, el mayor número de nichos se encuentra en las zonas debajo de los 1.200 m s.n.m. El conocimiento de la ecología de los peces en el río Magdalena aún es incipiente, pero es posible aportar a partir de la información disponible para la toma de decisiones por parte de los diferentes actores de la cuenca.
Allosteric hotspots in the main protease of SARS-CoV-2
Authors: Strömich Léonie , Wu Nan , Barahona Mauricio , Yaliraki Sophia
Published: March 2021

Inhibiting the main protease of SARS-CoV-2 is of great interest in tackling the COVID-19 pandemic caused by the virus. Most efforts have been centred on inhibiting the binding site of the enzyme. However, considering allosteric sites, distant from the active or orthosteric site, broadens the search space for drug candidates and confers the advantages of allosteric drug targeting. Here, we report the allosteric communication pathways in the main protease dimer by using two novel fully atomistic graph theoretical methods: bond-to-bond propensity analysis, which has been previously successful in identifying allosteric sites without a priori knowledge in benchmark data sets, and, Markov transient analysis, which has previously aided in finding novel drug targets in catalytic protein families. We further score the highest-ranking sites against random sites in similar distances through statistical bootstrapping and identify four statistically significant putative allosteric sites as good candidates for alternative drug targeting.
Validity and reliability of Hospital Anxiety and Depression Scale in cancer patients in Peru
Authors: Vilela-Estrada Ana L , Ambrosio-Melgarejo Juan , Esenarro-Valencia Loida , Sánchez-Ramírez José C , Lamas-Delgado Fernando , Villarreal-Zegarra David
Published: March 2021

The Hospital Anxiety and Depression Scale (HADS) despite being widely studied in various populations, there is still no consensus on its factor structure. Our study aims to evaluate the psychometric properties of HADS in people with cancer. It involved 467 patients-diagnosed with cancer, who could read and write and were treated in a public institution specialized in cancer. It was found that HADS is best suited to a bifactorial structure where there is one general factor (emotional distress) and two specific factors (anxiety and depression). HADS proves to be invariant according to sex and years of education. It is moderately related to Beck's anxiety and depression inventory. Also, it presents acceptable levels of reliability and relationship with instruments used in the diagnosis of anxiety and depression. Its brevity, versatility, hospital-focused design, and extensive study make HADS a very important instrument in the detection of anxiety and depression in cancer patients.
Atlantic Zonal Mode-Monsoon Teleconnection in a Warming Scenario
Authors: T Sabeerali C. , Ravindran Ajaya Mohan , V Praveen
Published: March 2021

The dominant interannual SST variability in the eastern equatorial Atlantic referred to as the Atlantic Zonal Mode (AZM), which peaks in boreal summer impacts global weather patterns. The cold (warm) phase of this ocean-atmospheric coupled phenomenon enhances (weakens) the intensity of the Indian summer monsoon rainfall (ISMR). Observational studies show a strengthening relationship between AZM and ISMR in recent decades, providing a predictive signal for the ISMR. However, a suite of Coupled Model Intercomparison Project Phase 6 (CMIP6) model simulations in the highest emission scenario (SSP58.5) show a weakening relationship between ISMR and AZM in the future (2050-2099). The strengthening of atmospheric thermal stability over the tropical Atlantic in the warming scenario weakens the associated convection over the eastern equatorial Atlantic in response to the warm phase of AZM. This leads to weakening velocity potential response over the Indian subcontinent, resulting in a weak AZM-ISMR relationship. There is no convincing evidence to indicate that either the tropical Atlantic SST bias or the AZM-ISMR teleconnection bias plays a crucial role in the potential weakening of this relationship. These results imply that ISMR prediction will become more challenging in a warming scenario as one of the major external boundary forces that influence monsoon weakens.