bluuebunny/crossref_metadata_2025 huggingface dataset:
USE OF ENERGY SAVING TECHNOLOGIES IN HEAVY ENGINEERING
Authors:   Donbas State Engineering Academy, Tulupov Volodimir , Onyshchuk Serhii ,   Donbas State Engineering Academ
Published: March 2023

Modern mechanical engineering is characterized by high energy consumption, which specific share of cost can reach from 15 to 25%. The task is to research energy-efficient technological methods of mechanical processing, which will reduce the cost and duration of the production cycle.As a criterion for optimizing the machining process, it is proposed to use quantitative indicators of the specific energy intensity of cutting. The feasibility of using energy-efficient strengthening methods in the technological process of manufacturing parts in heavy engineering needs to be studied.The purpose of the work is to study the use of energy-saving technologies in the manufacture of machine parts in heavy engineering.It is proposed to use a mathematical model to determine the optimal technological parameters of energy-efficient processes of mechanical processing of heavy engineering parts. The level of energy consumption in the cutting zone, which is spent on removing a given volume of material from the layer of the workpiece being cut, is best reflected by the specific energy intensity of cutting.To ensure the operational properties of machine parts, it is proposed to use methods of surface strengthening with the use of electric current.The use of finishing turning with electric pulse heating in the manufacturing process of the shaft allows to replace four operations -turning, heat treatment, two circular grinding operations -with one operation.Clean turning with electric pulse heating has such advantages as: the possibility of strengthening the surface layer of the part by differentially wearing it (for parts that wear unevenly); processing on one technological equipment; reducing the number of technological operations; low equipment costs.It was determined that the introduction of processing methods using electric current, in particular, turning with electric pulse heating, allows to significantly reduce the duration of the production cycle of manufacturing parts of heavy engineering. The amount of energy consumed can be reduced by 80%
CURRENT STATUS AND DEVELOPMENT PROSPECTS OF NANOSTRUCTURING OF DEFORMED METALS AND ALLOYS AND SPRAYED COATINGS
Authors:   Robert Elvorti Economics and Technology Institute, Makrukha Tetiana , Dubovyy Oleksandr ,   Admiral Makarov National University of Shipbuilding
Published: March 2023

The information presented in the article is an overview of the possibility of improving the mechanical properties of metals, alloys and sprayed coatings in order to obtain a dispersed, in particular, nanoscale substructure, which allows obtaining a set of unique operational characteristics, which, in turn, will increase the resource of parts of machines and mechanisms that are used in mechanical engineering.Today, the most common methodof nanostructuring is intensive plastic deformation (by friction, by equal-channel angular pressing, etc.), however, these methods can only be used for the manufacture of parts with a small cross-section, so the creation of new methods of deformation-thermal treatment is an urgent task of modern materials science.The paper shows the possibility of applying pre-deformation and pre-recrystallization heat treatment for technically pure iron, carbon steels of 1020 (сталь 20), 1045 (сталь 45), 1070 (сталь 70),A284Gr.D (Ст3) and C80W (У8) brands, alloyed steels of 5140H (40Х) and AISI 420 (20Х13) brands, Sv-08G2S (Св-08Г2С) gas-thermal and electric arc coatings, as well as Ni80Cr20 nichrome alloy and CuA19Mn2 (2.0960) bronze (БрАМц9-2).The work compares methods of static deformation with methods of intensive plastic deformation and shows that pre-recrystallization heat treatment allows to significantly strengthen metals (more than 30%) in combination with sufficient plasticity (for A284Gr.D (Ст3) steel, the relative elongation is up to 7.5%, and the relative narrowing is up to 75 %).The work presents the results of the experimental investigation of the influence of deformation and thermal factors on the mechanical properties, in particular, hardness and strength, of metals, alloys and sprayed coatings. It is established that the strengthening effect occurs due to the refinement of substructural elements, such as the size of coherent scatteringregions, the disorientation angle of subgrains, and the number of substructural elements to a nanoscale state. Thus, with the help of additional deformation followed by pre-recrystallization and heat treatment of carbon and alloyed steels, it is possible to obtain subgrains with a size of less than 200 nm with a disorientation angle of up to 2 ° with a relative amount of nanoscale subgrains of up to 65%.The possibility of industrial application of the proposed technology is shown on the example of production of regulating springs of membrane valves of pipelines made of 1070 (сталь 70) steel, which allows to increase the hardness by 19%.
WYDANIA ŚREDNIOWIECZNYCH RĘKOPISÓW LITURGICZNYCH TYPU „LIBRI ORDINARII”
Authors: Suski Andrzej
Published: March 2023

Zostanie dodany
PARTICIPATIO ACTUOSA FIDELIUM WE MSZY ŚWIĘTEJ OD PIUSA X DO KONSTYTUCJI SACROSANCTUM CONCILIUM
Authors: Krakowiak Czesław
Published: March 2023

Już w XIX wieku ruch liturgiczny, najpierw na Zachodzie (Francja, Belgia, Niemcy) a następnie w innych krajach miał wielki wpływ na bardziej świadome i czynne uczestnictwo wiernych w liturgii Mszy św. Dużą rolę w tym procesie włączania wiernych w liturgię Mszy św. pełniły mszaliki zawierające tłumaczenie tekstów Ordo Missae. Następnie papieże Pius X, Pius XI a zwłaszcza Pius XII w wydawanych dokumentach kierowanych do całego Kościoła podawali teologicznie uzasadnienie czynnego uczestnictwa w liturgii Mszy (kapłaństwo chrzcielne). Powinno to być najpierw uczestnictwo wewnętrzne (ofiarowanie siebie przez ręce kapłana) a następnie uczestnictwo zewnętrzne, głównie przez śpiew gregoriański, gesty i postawy ciała. Różne stopnie participatio actuosa, w różnych formach celebracji Mszy określiła Kongregacja Obrzędów w instrukcji De musica sacra et liturgia. Dopiero jednak soborowa Konstytucja Sacrosanctum Concilium stwierdziła, że sama natura liturgii wymaga actuosa participatio w niej wiernych i Kościół bardzo pragnie takiego „pełnego, świadomego i czynnego udziału wiernych w obrzędach liturgicznych” (KL 14). Autor na podstawie analizy dokumentów Kościoła od Piusa X do Piusa XII przedstawił rozwój rozumienia czynnego udziału wiernych w liturgii Mszy św. oraz jego różne formy (stopnie).
Rekwizycje piszczałek organowych „dla celów wojennych” w diecezji przemyskiej w 1917 roku
Authors: Widak Andrzej
Published: March 2023

I Wojna Światowa przyniosła wiele strat w dziedzinie zabytków sztuki. Zniszczeniawojenne dotknęły kościołów i znajdujących się w nim organów. W 1917 r. państwa biorąceudział w wojnie zarządziły rekwizycję piszczałek organowych dla celów wojennych. Naterenie diecezji przemyskiej należącej wówczas do metropolii lwowskiej a znajdującej się podzaborem austriackim rekwizycję piszczałek przeprowadzono w 1917 r. a wcześniej w 1915 r.rekwizycję dzwonów.W niniejszym artykule zostały omówione zasady, na jakich odbywała się rekwizycjapiszczałek organowych oraz instrumenty, które zostały od niej uchronione a które jejpodlegały. Artykuł został oparty na dokumentach zawartych w teczce „Akta 1914-1918”znajdującej się Archidiecezjalnym Archiwum w Przemyślu. Opracowanie uzupełnionodostępnymi informacjami z Inwentarzy parafialnych oraz Kroniki Diecezji Przemyskiej.Udało się uzyskać informacje na temat organów uchronionych od rekwizycji orazorganów, które zostały jej poddane. Od rekwizycji zostało uchronionych 18 organów, wprzypadku 13 instrumentów piszczałki zostały zarekwirowane. W odniesieniu do pozostałych10 organów można przypuszczać, że również uległy rekwizycji.W sumie niniejsze opracowanie dotyczy 41 instrumentów.
Avis sur les restaurants en ligne: détection et analyse quantitative
Authors: Kang Hyun Jung
Published: March 2023

The study examines, from various perspectives, restaurant evaluations written by customers and published online. From a manual observation of the corpus, we propose a model to study evaluations of experiences in restaurants; we show that evaluations can have several functions and contain different types of information: reviewers write reviews to give opinions, make suggestions, express intentions, and describe their experiences. We conduct various quantitative analyses using corpus linguistics methods which offer the possibility to identify the keywords of the reviews as well as their grammatical and topologocial characteristics, including keyword analysis, the distribution of parts of speech and the positions of evaluation categories within reviews. We finally try to automatically detect the evaluation categories in our corpus. We test and validate a supervised learning approach based on our model completed with other linguistic and textual features.
Simple and Convenient Mapping of Molecular Dynamics Mechanical Property Predictions for Strain Rate, Temperature, and Degree of Cure
Authors: Patil Sagar , Krieg Aaron , Odegard Leif , Yadav Upendra , King Julia , Maiaru Marianna , Odegard Gregory
Published: March 2023

It is well-known that all-atom molecular dynamics (MD) predictions of mechanical properties of thermoset resins suffer from multiple accuracy issues associated with their viscous nature. The nanosecond simulation times of MD simulations do not allow for the direct simulation of the molecular conformational relaxations that occur under laboratory time scales. This adversely affects the prediction of mechanical properties at realistic strain rates, intermediate degrees of cure, and elevated temperatures. An efficient method of correcting such MD predictions of elastic properties is proposed and demonstrated. The phenomenological approach is used to map the predictions of Young's modulus and Poisson's ratio for a DGEBF/DETDA epoxy system to the corresponding laboratory-based properties for intermediate degrees of cure and temperatures above and below the glass transition temperature. The approach uses characterization data from dynamical mechanical analysis temperature sweep experiments. The mathematical formulation and experimental characterization of the mapping are described, and the resulting corrections to the predicted elastic properties for various degrees of cure and temperatures are compared with the experiment. This mapping is particularly important to mitigate the strain-rate effect associated with MD predictions, as well as to accurately predict mechanical properties at elevated temperatures and intermediate degrees of cure to facilitate accurate and efficient composite material process modeling.
An in silico infrared spectral library of molecular ions for metabolite identification
Authors: Houthuijs Kas J. , Berden Giel , Engelke Udo F. H. , Gautam Vasuk , Wishart David S. , Wevers Ron A. , Martens Jonathan , Oomens Jos
Published: March 2023

Infrared ion spectroscopy (IRIS) continues to see increasing use as an analytical tool for small-molecule identification in conjunction with mass spectrometry (MS). The IR spectrum of an m/z selected population of ions constitutes a unique fingerprint that is specific to the molecular structure. However, direct translation of an IR spectrum to a molecular structure remains challenging, as reference libraries of IR spectra of molecular ions largely do not exist. Quantum-chemically computed spectra can reliably be used as reference, but the challenge of selecting the candidate structures remains. Here we introduce an in silico library of vibrational spectra of common MS adducts of over 4500 compounds found in the human metabolome database (HMDB). In total, the library currently contains more than 75 000 spectra computed at the DFT level that can be queried with an experimental IR spectrum. Moreover, we introduce a database of 189 experimental IRIS spectra, which is employed to validate the automated spectral matching routines. This demonstrates that 75% of metabolites in the experimental dataset is correctly identified, based solely on their exact m/z and IRIS spectrum. Additionally, we demonstrate an approach for specifically identifying substructures by performing a search without m/z constraints to find structural analogues. Such an unsupervised search paves the way towards the de novo identification of unknowns that are absent in spectral libraries. We apply the in silico spectral library to identify an unknown in a plasma sample as 3-hydroyxhexanoic acid, highlighting the potential of the method.
Realizing efficient blue and deep-blue delayed fluorescence materials with record-beating electroluminescence efficiencies of 43.4%
Authors: Fu Yan , Liu Hao , Tang Ben Zhong , Zhao Zujin
Published: March 2023

As promising luminescent materials for organic light-emitting diodes (OLEDs), thermally activated delayed fluorescence materials are booming vigorously in recent years, but robust blue ones still remain challenging. Herein, we report three highly efficient blue and deep-blue delayed fluorescence materials comprised of a weak electron acceptor chromeno[3,2-c]carbazol-8(5H)-one with a rigid polycyclic structure and a weak electron donor spiro[acridine-9,9'-xanthene]. They hold distinguished merits of excellent photoluminescence quantum yields (99%), ultrahigh horizontal transition dipole ratios (93.6%), and fast radiative transition and reverse intersystem crossing, which furnish superb blue and deep-blue electroluminescence with Commission Internationale de IEclairage coordinates (CIEx,y) of (0.14, 0.18) and (0.14, 0.15) and record-beating external quantum efficiencies (exts) of 43.4% and 41.3%, respectively. Their efficiency roll-offs are successfully reduced by suppressing triplet-triplet and singlet-singlet annihilations. Moreover, high-performance deep-blue and green hyperfluorescence OLEDs are achieved by utilizing these materials as sensitizers for multi-resonance delayed fluorescence dopants, providing state-of-the-art exts of 32.5% (CIEx,y = 0.14, 0.10) and 37.6% (CIEx,y = 0.32, 0.64), respectively, as well as greatly advanced operational lifetimes. These splendid results can surely inspire the development of blue and deep-blue luminescent materials and devices.
Can P3S and C3S Monolayers be Used as Anode Materials in Metal-Ion Batteries? An Answer from First-Principles Study
Authors: Chowdhury Somnath , Sarkar Pranab , Gupta Bikash Chandra
Published: March 2023

With the urgent need for efficient energy storage devices, enormous attention has been paid to researching and developing promising anode materials for metal-ion batteries. Through density functional study, we have successfully predicted the electrochemical performance of the P3S and C3S monolayers for the first time, which could be used in alkali metal (Li, Na, and K)-ion batteries. Our study examines the pristine monolayers' energetical, dynamical, and thermal stability. The electronic structures of the pristine nanosheets exhibit wide-gap semiconductors. After single metalation on the monolayers, the composite systems become metallic. Charge density difference (CDD) analysis indicates that charge transfer occurs from the alkali metal atoms to the P3S and C3S monolayers, and Bader charge analysis quantifies the amount of charge transfer. We have analyzed how readily a single adatom diffuses within the 2D structures. One example is the diffusion of K on C3S, which has a low barrier value of 0.06 eV and seems practically barrierless. Furthermore, our predicted composite systems report considerable theoretical storage capacity (C); for example, hexalayer K-adsorbed C3S shows a storage capacity of 1182.79 mA h g−1. The estimated open-circuit voltage (OCV) values imply that the C3S monolayer is promising anode material for Li-, Na-, and K-ion batteries, while the P3S monolayer is suitable as cathode material for Li-, Na-, and K-ion batteries.
Environmental and Nuclear Quantum Effects on Double Proton Transfer in Guanine-Cytosine Base Pair
Authors: Angiolari Federica , Huppert Simon , Pietrucci Fabio , Spezia Riccardo
Published: March 2023

We study the double proton transfer (DPT) tautomerization process in Guanine- Cytosine (GC) DNA base pairs. In particular, we investigate the influence of the biological environment on the mechanism, the kinetics and thermodynamics of such DPT. To this end, we present a molecular dynamics study in the tight-binding density functional theory framework, and compare the reactivity of the GC dimer in the gas phase with that of the same dimer embedded in a small DNA structure. The impact of nuclear quantum effects is also evaluated using the Ring Polymer Molecular Dynamics. Results show that in the isolated dimer, the DPT occurs via a concerted mechanism, while in the model biological environment, it turns into a step-wise process going through an intermediate structure. One of the water molecules in the vicinity of the proton transfer sites plays an important role as it changes H-bond pattern during the DPT reaction.
Structural, electronic and vibrational properties of methylated single- and bilayer graphene: A density functional theory study
Authors: Mazarei Elham , Penschke Christopher , Saalfrank Peter
Published: March 2023

The functionalization of graphene has an immediate effect on its chemical and physical properties. In this paper we systematically study the functionalization of single layer graphene (SLG) with methyl (CH3) radicals, using periodic density functional theory (DFT) at the PBE+D3 level of theory. Special emphasis is on identifying most stable structures and corresponding electronic properties (band gap, electronic density of states, spin polarization) as a function of methyl load. For SLG, methyl coverages ranging from 1/8 to 1/1 (i.e., the fully methylated analog of graphane) are considered. We find that up to a coverage of 1/2, graphene readily accepts CH3, with neighbour CH3 groups prefering trans positions, and band gaps increasing non-monotonically with methyl load. Above coverages of 1/2, the tendency to accept further CH3 weakens, lattice constants widen and the band gap behaves less regular. Besides radicalic methylation, we also study heterolytic methylation by either the methyl anion CH3- (reaction with CH3Li) or the methyl cation CH3+ (reaction with CH3Cl), with counterions also included. Finally, we consider methylation (with CH3 radicals) of bilayer graphene (BLG). To guide in the interpretation of methylation experiments, vibrational signatures of various species are characterized by normal mode analysis (NMA), their vibrational density of states (VDOS), and infrared (IR) spectra, the latter two obtained from ab initio molecular dynamics (AIMD).
Total Enantioselective Synthesis of a Norbornene Derivative via Lewis Acid Catalyzed Asymmetric Diels-Alder Reaction using the Oppolzer's Camphorsultam as a Chiral Auxilary
Authors: Labidi Aymen , Yacin-Ali Anissa
Published: March 2023

In this paper, an efficient enantioselective synthesis of a norbornene derivative is described. Oppolzer's chiral sultam-directed asymmetric Diels-alder [4+2] cycloaddition was conducted as a crucial tool to control the diastereoselectivity of the cycloadduct leading to the desired enantioselective target molecule after the chiral auxilary removal. The synthesis process was demonstrated as a proof of study on a lab scale and the full experiment is addressed to advanced undergraduate students who are trained in organic synthesis and NMR spectroscopy.
Analysis of context-specific KRAS–effector (sub)complexes in Caco-2 cells
Authors: Ternet Camille , Junk Philipp , Sevrin Thomas , Catozzi Simona , Wåhlén Erik , Heldin Johan , Oliviero Giorgio , Wynne Kieran , Kiel Christina
Published: March 2023

Ras is a key switch controlling cell behavior. In the GTP-bound form, Ras interacts with numerous effectors in a mutually exclusive manner, where individual Ras–effectors are likely part of larger cellular (sub)complexes. The molecular details of these (sub)complexes and their alteration in specific contexts are not understood. Focusing on KRAS, we performed affinity purification (AP)–mass spectrometry (MS) experiments of exogenously expressed FLAG-KRAS WT and three oncogenic mutants (“genetic contexts”) in the human Caco-2 cell line, each exposed to 11 different culture media (“culture contexts”) that mimic conditions relevant in the colon and colorectal cancer. We identified four effectors present in complex with KRAS in all genetic and growth contexts (“context-general effectors”). Seven effectors are found in KRAS complexes in only some contexts (“context-specific effectors”). Analyzing all interactors in complex with KRAS per condition, we find that the culture contexts had a larger impact on interaction rewiring than genetic contexts. We investigated how changes in the interactome impact functional outcomes and created a Shiny app for interactive visualization. We validated some of the functional differences in metabolism and proliferation. Finally, we used networks to evaluate how KRAS–effectors are involved in the modulation of functions by random walk analyses of effector-mediated (sub)complexes. Altogether, our work shows the impact of environmental contexts on network rewiring, which provides insights into tissue-specific signaling mechanisms. This may also explain why KRAS oncogenic mutants may be causing cancer only in specific tissues despite KRAS being expressed in most cells and tissues.
Preference of CAMSAP3 for expanded microtubule lattice contributes to stabilization of the minus end
Authors: Liu Hanjin , Shima Tomohiro
Published: March 2023

CAMSAPs are proteins that show microtubule minus-end–specific localization, decoration, and stabilization. Although the mechanism for minus-end recognition via their C-terminal CKK domain has been well described in recent studies, it is unclear how CAMSAPs stabilize microtubules. Our several binding assays revealed that the D2 region of CAMSAP3 specifically binds to microtubules with the expanded lattice. To investigate the relationship between this preference and the stabilization effect of CAMSAP3, we precisely measured individual microtubule lengths and found that D2 binding expanded the microtubule lattice by ∼3%. Consistent with the notion that the expanded lattice is a common feature of stable microtubules, the presence of D2 slowed the microtubule depolymerization rate to ∼1/20, suggesting that the D2-triggered lattice expansion stabilizes microtubules. Combining these results, we propose that CAMSAP3 stabilizes microtubules by lattice expansion upon D2 binding, which further accelerates the recruitment of other CAMSAP3 molecules. Because only CAMSAP3 has D2 and the highest microtubule-stabilizing effect among mammalian CAMSAPs, our model also explains the molecular basis for the functional diversity of CAMSAP family members.
Diversified Teaching Method in Basic Piano Course Instruction for Higher Education Teachers
Authors: Yang Yaokun
Published: March 2023

Diversified teaching plays an important role in the sustainable development of China’s basic piano course instruction for higher education teachers. A diversified curriculum system should be designed to promote the development of each student, and efforts should be made to cultivate high-quality talents who can adapt to the various needs of the society as well as to promote the reform and development of basic piano course instruction for higher education teachers. The aim of this study was to explore the teaching of basic piano course for higher education teachers based on the diversified teaching method. The teaching methods use for basic piano course were analyzed in this study, and two research methods were used to carry out the present study so as to effectively improve the operation of the diversified teaching method. Through a survey of the current situation of piano instruction in two higher education faculties, we can see that the teaching of basic piano course in higher education is still dominated by the traditional teaching method although the majority of students preferred the diversified teaching method.
The Effect of Socio-Cultural Factors on English Language Learning and the Impact on SSCE Results: The Case of Private vs Public Secondary Schools in Kano, Nigeria
Authors: Uba Sani Yantandu , Irudayasamy Julius , Hankins Carmel Antonette
Published: March 2023

This paper investigates the effect of socio-cultural practices on the English Senior School Certificate of Education (SSCE) results in public and private secondary school students in Kano, Nigeria. Using a case study approach, we explore whether socio-cultural practices might have influenced or constrained student performance in English SSCE results. This case study involves ten (10) participants from ten (10) secondary schools. An open-ended questionnaire was administered to all participants; findings revealed that teaching-related facilities in public secondary schools are not sufficiently available, unlike private schools. Furthermore, findings also indicate that the teacher-student ratio in public secondary schools is higher than in private schools. Students’ attitudes towards learning English language, including the use of social media, has also influenced the English SSCE results. Likewise, the schools’ socio-cultural practices affect the students’ performance in English SSCE exams. It is strongly recommended that the recruitment of additional English language teachers in public schools, and the establishment of more public schools aimed at improving the teacher-student ratio be employed. This would likely provide more active and interactive sessions for students, as well teachers. There is also a need to provide sufficient teaching and learning facilities and equipment in public schools, such as chairs, tables, fans, air-conditioning units, textbooks, computers, projectors, and so on. Public-school stakeholders should encourage the use of English language in English classes.
Usulcülere Göre Emir-İrade İlişkisi
Authors: DEMİRBOĞA Selman
Published: March 2023

Fıkıh usulü eserlerinde emir konusuyla ilgili tartışılan meselelerden biri de emrin iradeyi gerektirip gerektirmediği meselesidir. Emrin, emir olması için irade vasfının gerekli olup olmadığı, bu meselenin temelini oluşturmaktadır. Söz konusu tartışma, talebin mahiyeti ve Allah'ın irade etmediği bir şeyi emretmesinin caiz olup olmamasından kaynaklanır. Bununla birlikte kelâm-ı nefsî ile ilgili görüş farklılığının da teorik anlamda bu tartışmayla ilgili olduğu görülmektedir. Konuyla ilgili usul literatüründe temelde iki görüşten söz etmek mümkündür. Mu’tezilî ve Şiî usulcülerin benimsediği birinci yaklaşıma göre emir iradeyi gerektirir. Bu görüşe göre emir, ancak emredilen şeyin emreden tarafından irade edilmesiyle söz konusu olur. Dolayısıyla emirde mutlaka iradenin bulunması gerekir. Bu görüş sahiplerinin emirde bulunmasını şart koştukları irade, emredilen şeyin yapılmasını gerektiren iradedir. Mu’tezilî usulcülerin emirde iradeyi şart koşmasının altında yatan temel sebeplerden birinin savundukları adalet ilkesiyle bağlantılı olduğunu söylemek mümkündür. Zira onlara göre Allah adaleti gereği irade etmediği bir şeyi emretmez. Cumhûrun benimsediği ikinci görüşe göre ise emir iradeyi gerektirmez. Buna göre emirde, emredilen şeyin irade edilmiş olması şart değildir. Dolayısıyla irade edilen bir şeyin emredilmesi caiz olduğu gibi irade edilmeyen bir şeyin emredilmesi de caizdir. Bu nedenle emrin emir olması için talep dışında irade gibi ek bir sıfata ihtiyaç yoktur.
Bu makalenin amacı usul eserleri bağlamında emrin iradeyi gerektirip gerektirmediğiyle ilgili tartışmanın mahiyetini ortaya koymak ve tarafların görüşlerini temellendirmek için tutunduğu gerekçeleri açıklamaktır. Bu yönüyle söz konusu problemin açığa kavuşturulması hedeflenmektedir.
Ekonomide Yapısal Dönüşüm Ekolojik Ayak İzini Azaltabilir Mi? E7 Ülkeleri Üzerine Bir Analiz / Can Structural Transformation in the Economy Reduce Ecological Footprint? An Analysis on E7 Countries
Authors: OLUÇ İhsan
Published: March 2023

Küresel iklim değişikliğinin ve artan çevresel bozulmanın büyük bir bölümü insan faaliyetlerinden kaynaklanmaktadır. Dolaysıyla insanoğlunun küresel geleceği ve toplumsal refahının korunup geliştirilebilmesi için ekolojik ayak izinin küçültülmesi gerekmektedir. Ekonomik yapılarda meydana gelen dönüşümün çevresel kalite üzerinde etkileri bulunuyor olsa da bu konu yeterince araştırılmamıştır. Bu amaçla E7 ülkelerinin ekonomik yapılarında meydana gelen yapısal dönüşümün ekolojik ayak izi üzerindeki etkileri incelenmiştir. Çalışmada 1992-2017 yıllarını içeren panel veri kullanılmıştır. Veriler arasındaki ilişkinin test edilmesi için sırasıyla homojenlik testi Durbin-Hausman eş bütünleşme testi, yapısal kırılmalı eşbütünleşme testi yapılmıştır. Uzun dönem eş bütünleşme katsayıları AMG tahmincisi ve CCE-MG tahmincisi ile tahmin edilmiştir. Yapılan eşbütünleşme testleri serilerin birlikte hareket ettiklerini yani uzun dönemde eşbütünleşik olduklarını göstermiştir. Elde edilen uzun dönem katsayıları ise E7 ülkelerinde meydana gelen yapısal dönüşümün ekolojik ayak izini küçülterek sürdürülebilir kalkınmayı desteklediğini ortaya koymaktadır.
Doğrudan Yabancı Yatırımlarının Çevresel Kirliliğe Etkisi: N-11 Ülkeleri Örneği / The Effect of Foreign Direct Investments On Environmental Pollution: The Example of N-11 Countries
Authors: USTA Can
Published: March 2023

Çalışmada, N-11 ülkelerinde 1993-2019 dönemi yıllık veriler kullanılarak, kirlilik sığınağı hipotezi ve kirlilik halesi hipotezi kapsamında doğrudan yabancı yatırım (DYY), ticari açıklık oranı (TO), ekonomik büyüme ve çevre kirliliği (CO2) arasındaki ilişkiler test edilmiştir. Panel regresyon analizinin kullanıldığı çalışmada temel varsayımlara karşı dirençli olan Driscoll-Kraay (1998) standart hata tahmincisi ile katsayılar tahmin edilmiştir. Tahmin sonuçlarına göre, DYY’deki %1'lik bir artış, çevre kirliliğini yaklaşık %0.15 oranında artırmakta ve böylece kirlilik sığınağı hipotezini doğrulamaktadır. Başka bir deyişle, DYY ev sahibi ülkede çevresel kirliliğe neden olmaktadır. Bu sonuç aynı zamanda kirlilik halesi hipotezini de geçersiz kılmaktadır. Çalışmanın diğer sonuçlarına göre, GSYİH'deki %1'lik bir artış çevresel kirliliği yaklaşık %3.5 ve TO’daki %1’lik bir artış çevresel kirliliği yaklaşık %0.02 oranında artırmaktadır.
BİST 100 ve Seçilmiş Ülke Endeksleri Arasındaki Volatilite Yayılım Etkisi: Diyagonal VECH GARCH Modeli / The Effect of Volatility Spillover Between BIST 100 and Selected Country Indices: Diagonal VECH GARCH Model
Authors: DEMİREL Esra
Published: March 2023

Bu çalışmada BİST 100 ile gelişmiş dünya ülkelerinden seçilen altı endeks arasındaki volatilite yayılım etkisi 4 Ocak 2016 ve 9 Haziran 2021 tarihleri arasındaki günlük endeks kapanış verileri kullanılarak araştırılmıştır. Dünya ülkeleri arasındaki volatilite yayılım etkisi araştırılırken çok değişkenli GARCH modellerinden biri olan Diyagonal VECH GARCH modeli uygun model olarak seçilmiştir. Getiri serilerine ilk olarak birim kök testleri uygulanarak durağanlık araştırması yapılmıştır. Ardından VAR modeli analizi ile ortalama denklemi tahmin edilmiştir. Son olarak kurulan altı model için Diyagonal VECH GARCH yöntemiyle volatilite yayılım etkileri araştırılmıştır. Sonuç olarak BİST 100 endeks getiri volatilitesini pozitif olarak en çok etkileyen endeksin %95 oranıyla DAX olduğu tespit edilmiştir. DAX’ı %89 oranıyla NASDAQ ve DJIA endeksleri takip etmektedir. BİST 100 endeks getiri volatilitesini %87 oranda pozitif olarak etkileyen diğer endeks ise S&P 500’dür. Bu endekslerde oluşan %1’lik şokların BİST 100 endeksi volatilitesinde artışlara sebep olduğu saptanmıştır.
Nuevos registros de las subfamilias Ceropalinae y Notocyphinae (Hymenoptera: Pompilidae) de la estación biológica “Manu Learning Centre”, Perú
Authors: Amaru-Castelo Javier , Marquina Montesinos Edgar
Published: March 2023

Se presentan nuevos registros de especies de las subfamilias Ceropalinae y Noto-cyphinae colectados en la estación Biológica “Manu Learning Centre” ubicada en la zona de amortiguamiento del Parque Nacional del Manu. Reportándose 12 especies, de las cuales cinco son nuevos registros para Perú: Notocyphus variegatus Banks, Notocyphus nubilipennis Fox, Notocyphus deceptus Banks, Notocyphus nigrinus Banks y Irenangelus ichneumonoides Ducke; y seis especies son nuevos registros para el Departamento de Madre de Dios: Notocyphus thetis Banks, Notocyphus pallidipennis Banks, Notocyphus vindex Smith, Notocyphus tyrannicus Smith, Notocyphus brevicornis Fox, Notocyphus maculifrons Smith.
Dynamic virtual assistance of I/O functionalities
Authors: Mohammed Musharaf Z  , Meril Akash. J  , M. Malleswari
Published: March 2023

With significant advancements being witnessed in the engineering industry daily, it has become increasingly vital for society to seek out particular new ways of interacting with computer technology and automation as their demand grows in society. Today, every device is developing the use of touch screen technology on its computer systems, although it is not cost-effective to use in all applications. A specialized system, similar to a virtual device, that provides object pursuit (tracking) and Gestures to let us engage; it might be an effective alternative to the standard touch screen and also the solid physical gadgets. The goal is to create an object pursuit (tracking) program that communicates with the computer system. This proposed model is a computer vision-based control system that involves hand movements taken from a digital camera via a hand detection technique implemented with OpenCV libraries. Our project applies gesture recognition as a topic that comes under two computer science fields augmented reality and human-computer interaction and we have created a virtual gesture system to elucidate human gestures through mathematical algorithms. Users can use simple finger or hand gestures to control or interact with the system without physically touching them and also included voice assistance to start and end the gesture controlling system. Gesture recognition can be viewed as a way for computers to begin to recognize human body language and signs, thus stuffing the void between computing systems and humans than the earliest text user interfaces or even graphical user interfaces, which still limit the majority of input to keyboard and mouse are may not be very efficient at all times. The algorithm is focused on deep learning for detecting the gestures. Hence, the proposed system will avoid the pandemic situation of COVID-19 spread by reducing the human interaction with the devices to control the system
Description of fish cultivation and production results of fish farming group in Palembang City
Authors: Nyayu Maimanah  , Sriati  , Dessy Adriani
Published: March 2023

Indonesia has enormous fishery potential. The city of Palembang is one area where the government encourages the development of urban fishery businesses through the establishment of fishery groups. Until now, the topic of urban fisheries on cultivation methods and production results and farmers' income has not been studied much. The research aims to · Describe the cultivation process in aquaculture groups in the Palembang City. · Analyzing the production results of fish farming groups in Palembang City · Analyzing the income of fish cultivating groups in Palembang City. The results of this research are useful as a foundation for developing urban fisheries. This research was conducted in Gandus and Sukarami Districts, Palembang City. This study used a survey method with an unbalanced layered random sampling method. The number of samples is 100 people. The method of analysis using the scoring method, Spearman correlation statistical testing. This shows that in the future it is necessary to continue to increase the participation of fish cultivators in groups, improve group work programs to provide increased production capacity and fish cultivating businesses, increase the role of fishery extension workers, establish collaborative programs with stakeholders for fishery development in Palembang City.
Determination of phytochemicals and anthelmintic activity of Rytigynia kigeziensis Verdc extracts using Eudrilus eugeniae model
Authors: Evarist Asiimwe  , Erick Nyakundi Ondari  , Grace Akinyi Odongo  , Ronald Kyobe Kimanje
Published: March 2023

Helminthic infections are among the global public health problems. Due to high cost of standard drugs and resistance, rural dwellers use herbal preparations. However, efficacy and mechanisms of action remains elusive. In Uganda, Rytigynia kigeziensis is one of the commonly used anthelmintic herbs. The current study sought to determine the effect of phytochemicals in R. kigeziensis from the stem bark against E. eugeniae model for application as anthelmintic. The anthelmintic activity was carried out by time of paralysis and time of death at various at concentrations (15, 25, 50 and 100 mg/ml). Further LDH activity was examined to shade light on the possible mechanism of inhibition. All the results obtained were expressed as mean values ± SEM (n=3). The significance of difference between the means of albendazole and extracts concentrations were determined using One-way ANOVA on PAST version 3.15 and regarded significant at P ≤ 0.05. The phytochemicals extracted were in the order ethanol> methanol> aqueous> ethyl acetate> chloroform whereby alkaloids, flavonoids, saponins, glycosides, steroids, anthraquionones and tannins were present in all the extracts. Phlobatannins were absent in all extracts while terpenoids were absent in ethyl acetate, reducing sugars and phenols were also not observed in chloroform extracts. The anthelminthic activity was dose dependent in all extracts in the order ethanol>methanol>ethyl-acetate>aqueous>chloroform extracts. The LDH activity was dose dependent and statistically significant. The results were statistically significant when compared against albendazole. The findings suggest synergistic effect R. kigeziensis stem bark extracts, and the plant may serve as a potential anthelminthic agent.
Forecasting Road Traffic Accidents in Metro Manila Using ARIMA Modeling
Authors: Rofel Floria Sabenorio  , Marivic Leonardo Enriquez  , Lorenzo Miguel Andres Ramel
Published: March 2023

In this paper, we have determined and analyzed the behavior of road traffic accidents (RTAs) in Metro Manila, Philippines over the period of 2012-2021, and created a forecast for the next 5 years using ARIMA modeling. This study used 10-year historical monthly data collated through the Metro Manila Accident Recording and Analysis System program for the years 2012 through 2021. Our result suggests that the total RTAs in Metro Manila gradually increased until the first quarter of 2020, then it plummeted and reached its lowest point in April 2020 due to COVID-19 lockdown. As lockdown eases, it bounced back but only halfway. Similarly, RTAs resulting in damage to property also bounced back to only halfway as lockdown eases, while RTAs resulting in injuries (fatal and nonfatal) bounced back to their normal range as before the lockdown. Despite the decrease in total RTAs, the ratio of RTAs resulting in injuries drastically increased during the lockdown due to reckless driving behaviors. Using Box-Jenkins methodology of ARIMA modeling, this study identified ARIMA (1, 1, 12) as the best model. With this model, the forecast shows that the total RTAs will stay halfway in 2022 and gradually decrease for the next 4 years.
Rise and fall of surgery for peptic ulcer disease
Authors: VINOD KUMAR NIGAM  , SIDDARTH NIGAM
Published: March 2023

Earlier the treatment for peptic ulcer was surgery such as truncal vagotomy and drainage procedure. Recurrence after surgery and complications were common. It was because of our lack of knowledge about helicobacter pylori bacteria we used to blame factors such as lifestyle, other than infections causing peptic ulcer. It was due to two genius Australian doctors who identified the bacteria and the scenario was changed. Surgery for peptic ulcer gradually diminished dramatically after the development of H2 receptor antagonists and proton pump inhibitors. The surgery for complications of peptic ulcer such as perforations remain same but elective surgery for peptic ulcer drastically reduced. There was a time when after failed medical treatment for peptic ulcer patients were advised surgery or remain on cold milk and bread. These researches in medicine have alleviated human suffering from peptic ulcer disease. Patients of deep penetrating peptic ulcer used to weep with pain and treating clinicians also used to get frustrated for not getting ways to make patients painfree.
In-service teachers mathematics conceptions through the lens of ethnomathematics
Authors: John Lemer Galupo Bravo  , Charmaine Faith Dela Cruz Cahilig  , Ruenna Jane Manaloto Galvez  , Adrian Paul Bañaga Isleta  , Wrendell Coralde Juntilla  , Cristine De Guzman Villaroman
Published: March 2023

The ethnomathematical perspective brings to light epistemological issues about teachers' conceptions of Mathematics. This study explores teachers' Mathematics conceptions and the evidence in their instruction framed using an ethnomathematical lens that highlights three dimensions: a practical approach that attends to the development of relations of Mathematics to reality, a social approach that proposes a view of Mathematics as a system of meanings of quantity, relationship, and space by a certain group of people, and a cultural approach that focuses on reflections from cultural groups that represent many different perspecAtives on Mathematics. Many researchers and educators recognize the significant influence of these approaches in interpreting and implementing Mathematics curricula. It influences how teachers' conceptions of mathematics affect their approach to teaching and learning mathematics. The survey adapted from Albanese and Perales and Andrews and Hatch reveals that the three approaches were given importance by the in-service Mathematics teachers of a teacher education institution in determining and developing their conceptions of Mathematics. The findings showed that the in-service teachers' conceptions of mathematics were visible from an ethnomathematical perspective. The practical approach in their instruction was highly evident but was the least important for the in-service teachers. Future research on how these conceptions play a part in the teaching-learning process is recommended. Conducting workshops and training for teachers on including an ethnomathematics approach in their instruction will help them more effectively design a lesson and reflect on the learning environment they would create in their classrooms.
‘It is the greenness, the nature, it looks as if someone has taken care of the place very well’
Authors: Nordh Helena , Wingren Carola
Published: March 2023

This article is about experiences of a cemetery landscape: a physical space that was chosen as a depository for human remains, and where different memorial and disposal practices have developed behavioural patterns that together form a cemetery culture. Through qualitative research at St Eskil’s, Eskilstuna, Sweden, encompassing field observations and interviews (N=14) with stakeholders and people from the general public, we aim to describe and discuss the cemetery as a place and environment experienced from a perspective of people of diverse backgrounds. The study reveals important characteristics that facilitate designing, caretaking, developing and using cemeteries more generally. Findings show that most interviewees, independent for example of cultural or religious adherence, describe the cemetery as a beautiful natural or garden-like place. The well-maintained landscape is emphasized as a self-evident or impressive quality. The cemetery is experienced as ‘typically Swedish’ and described in terms of order and sense of care. Diversity in both design and multi-cultural and individual expressions are observed, acknowledged and welcomed. We conclude that nature (including a garden approach), care and diversity are key concepts that should be considered in design and development of future cemeteries.
Deathscapes in Finnish funerals during Covid-19
Authors: Vähäkangas Auli
Published: March 2023

The Covid-19 pandemic has disrupted and reshaped experiences of bodily disposal and memorialization around the world. One key characteristic of almost all religious practices and traditions is the centrality of face-to-face gatherings (Baker et al. 2020). The spatial turn shows the need to study space and place in research on religion (Knott 2010). Avril Maddrell has utilized a spatial lens for death studies with her concept of the deathscape, by which she means both the places associated with death and the dead and how these are infused with meaning (Maddrell and Sidaway 2010). The aim of my article is to uncover which spaces were used in Finnish funerals and what they reveal about deathscapes during Covid-19. The forty-five pieces of correspondence that form the qualitative data of the research were received between October 2020 and February 2021; they offer some important, real-time insights into how funeral spaces and burial places were experienced during the two first waves of the pandemic. The findings reveal that participation in the ritual was more important than the actual site of the funeral, burial or memorial. The findings indicate that deathscapes in Finnish funerals during Covid-19 typically dealt with how ritual space was created during restrictions. The physical site was important as long as it created ritual space and was aligned with the personality of the deceased. Central to these actively created spaces was that they followed the deceased body either physically, virtually or spiritually. The latter was a conceptual finding from the data and a means by which the writers pointed to spatialities of belief and virtual attendance that were not digitally mediated.
Clinical and Demographic Features of Twenty- Nine Patients with Psoriatic Arthritis “Sine Psoriasis”
Authors: Karabulut Yusuf , Kurtulus Duygu , Saritas Fatih , Gucenmez Sercan , Yilmaz Zevcet , Simsek Sevtap , Esen Irfan
Published: March 2023

Amaç: Psoriatik Artrit (PsA), sedef hastalığı (PsO) olan hastaların %10-30'unu etkileyen kronik ilerleyici inflamatuar bir hastalıktır. "PsA Sine sedef hastalığı" terimi, "cilt belirtileri olmadan PsA teşhisi konan hastaları" tanımlamak için kullanılır. Bu çalışmada “PsA” “sine psoriasis”in demografik ve klinik özelliklerinin CASPAR kriterlerine göre tanımlanması amaçlandı.
Hastalar ve Yöntem: 2016-2022 yılları arasında CASPAR kriterlerine göre PsA sine psoriasis tanısı alan 29 hasta çalışmaya dahil edildi. Romatizmal hastalığı ve herhangi bir cilt tutulumu olan hastalar çalışma dışı bırakıldı.
Bulgular: Çalışmaya dahil edilen 29 hastanın tamamına CASPAR kriterlerine göre PsA tanısı konuldu. Hastaların 16'sı kadındı. Hastaların ortalama (±SS) yaşı 45±11 idi. Hastaların ortalama (±SD) PsA süresi 6,2±3,0 yıldı. PsA'lı hastaların birinci derece akrabalarında psoriazis öyküsü %54,1; ikinci derece akrabalarında psöriazis öyküsü ise %45,9 olarak saptandı. Hastaların %39,4'ünde poliartiküler, %35,7'sinde oligoartiküler, %24,9'unda aksiyal tutulum vardı. Tüm hastaların 19'unda (%65,5) DİP tutulumu mevcuttu. Hastaların %88.9'unda tırnak bulguları mevcuttu. Ayrıca hastaların 17'sinde (%58,6) entezit, 18'inde (%62) daktilit saptandı.
Sonuç: PsA'yı düşündüren klinik semptom ve bulguları olan ve ailede psöriazis öyküsü olan hastalar, PsA sine psoriasisi olarak sınıflandırılabilir. Daktilit ve DIP artritli hastalar, ailesel sedef hastalığı PsA'nın bir alt grubunu temsil edebilir.
A Rare Case of Porencephaly with Seizure Disorder, Organic Personality Change and Agitated Depression
Authors: Rayaji Shaktidevi G , Manju Aswath , Pandit Lakshmi V , Kshamaa Haradanahalli Giriprakash
Published: March 2023

Porensefali, serebral yarım küredeki kistler/boşluklar ile karakterize bir merkezi sinir sistemi bozukluğudur. Nöbetler, parezi, öğrenme güçlükleri, zeka geriliği ve nadiren psikiyatrik belirtiler gibi çeşitli klinik belirtilere sahiptir. Psikiyatrik belirtiler arasında psikoz en sık görülen belirtidir. Psikiyatrik sendromlarla başvuran porensefali ile ilgili sadece birkaç vaka raporu vardır. Bu vaka sunumunda nöbet bozukluğu, organik kişilik değişikliği ve ajite depresyon ile benzersiz bir porensefali vakasının tartışılması amaçlandı.