bluuebunny/crossref_metadata_2025 huggingface dataset:
MHD stagnation point transient flow of a nanofluid past a stretching sheet: SRM approach
Authors: Kumar Bhuvaneshvar , Seth G. S.
Published: March 2021

Stagnation point nanofluid flow over a stretching sheet embedded in a porous medium is investigated in the present model by taking Navier’s velocity sip into account. The spectral relaxation method (SRM) is utilized to solve boundary layer equations. The variation of nanofluid velocity, concentration and temperature corresponding to some dominant flow parameters is displayed via graphs. The findings reveal that when stretching sheet is moving faster than free stream then porous permeability, unsteadiness, velocity slip and magnetic parameters have tendency to reduce fluid velocity but in opposite case, they behave as an assisting parameters for flow field.
APPROXIMATING PROBABILITY DISTRIBUTION FUNCTIONS WITH FEW MOMENTS
Authors: Wille Emilio
Published: March 2021

A procedure is presented for approximating a given probability distribution function or statistical data considering a subset of their moments.This is done by a method of fitting moments of a piecewise linear functionto the moments of the known data. The approach has many advantages over popular approximation approaches. The procedure is demonstrated with commonly used cdfs (Exponential, Gamma, Log-Normal, Normal) andmore difficult problems involving sum and product of random variables,obtaining good agreement between the theoretical/simulation curves and the piecewise linear approximations.
A TECHNIQUE TO ESTIMATE THE TRANSIENT COEFFICIENT OF HEAT TRANSFER BY CONVECTION
Authors: Umbricht Guillermo Federico , Rubio Diana , Echarri Rodolfo , El Hasi Claudio
Published: March 2021

In this work we study the characteristics of the dissipation by convection of a solid circular section of a diameter d in a fluid. We assume that this section increases its temperature homogeneously over its whole surface from an initial temperature 𝒕𝒂 to the (asymptotic) temperature value 𝒕𝒎𝒂𝒙. To simulate its temperature behavior, we model the transfer of heat by conduction in an isolated one-dimensional bar of length L, where a constant temperature source F is considered at the left end, while keeping free the right end causing heat dissipation by convection. We propose a novel approach to estimate the heat transfer coefficient in the transient state. Numerical experiments are carry out for different materials. In order to measure the performance in the estimation, we conduct elasticity analysis. Also a comparison with data used in the literature is included.
EFFECT OF NON-HOMOGENEOUS LIQUID DISTRIBUTION ON EFFICIENCY OF STRUCTURED PACKING MATERIALS
Authors: Cerro Ramon Luis
Published: March 2021

Uneven liquid distribution (maldistribution) is a recurrent problem in the design and operation of packed towers, regardless of the type of packing. Using a simple but rigorous analysis it can be shown that the effect of liquid maldistribution on holdup is highly nonlinear and has cascading effects on liquid residence times and mass transfer rates. A statistical liquid film thickness description is used to characterize liquid distribution on corrugated structural packing. The distribution has a single adjustable parameter, the volume average variance of the distribution.
ENTROPY GENERATION OF HYDRO-MAGNETIC STAGNATION POINT FLOW OF MICROPOLAR FLUID WITH ENERGY TRANSFER UNDER THE EFFECT OF UNIFORM SUCTION/ INJECTION
Authors: Dey Debasish , Hazarika Madhurya
Published: March 2021

Abstract-- The entropy generation of hydro-magnetic stagnation point flow of micro-polar fluid with energy transfer has been analyzed numerically. An uniform magnetic field is applied normal to the plate. The partial differential equations are transformed into ordinary differential equations using similarity transformations. The effects of magnetic parameter, material parameter, Prandtl number, Grashof number on the flow and entropy generation are discussed and plotted graphically using the MATLAB built in bvp4c solver.
ANALYSIS OF PERISTALTIC FLOW OF RABINOWITSCH FLUID IN A NON-UNIFORM CHANNEL: ANALYTICAL APPROACH
Authors: C Rajashekhar , G Manjunath , Vaidya Hanumesh , Prasad Kerehalli Vinayaka , B Divya B , J Saraswati
Published: March 2021

The present paper examines the impact of heat and mass transfer on the peristaltic flow of Rabinowitsch fluid through a non-uniform channel. The effects of slip and variable fluid properties are taken into account. The impacts of wall rigidity, wall stiffness, and viscous damping force parameter are considered. The equations governing the flow are rendered dimensionless by using a suitable similarity transformation. The governing equations of momentum, motion, energy, and concentration are solved by utilizing long wavelength and small Reynolds number approximation. The MATLAB 2019a programming has been used to obtain the solutions for velocity and concentration profiles. The series solution technique has been utilized to get the expression for temperature. The influence of relevant parameters on velocity, temperature, concentration, and streamlines are examined for viscous, shear-thinning, and shear thickening fluid models. The examination uncovers that a rise in the value of variable viscosity and variable thermal conductivity improves the velocity and temperature profiles for Newtonian and pseudoplastic fluid models. Moreover, an increase in the volume of the trapped bolus is seen for an expansion in the estimation of the velocity slip parameter for all the three considered models.
SORPTION-ENHANCED STEAM REFORMING OF ETHANOL FOR HYDROGEN PRODUCTION
Authors: Avendaño Roger , Dieuzeide Maria Laura , Bonelli Pablo , Amadeo Norma Elvira
Published: March 2021

In last years, sorption-enhanced steam reforming of ethanol (SESRE) has become an interesting alternative for the industry, since it offers high H2 purity with a simpler and smaller system. In this study CaO derived materials were synthesized to improve multicyclic CO2 sorption-desorption stability. A dispersant and inert phase (Ca12All4O33) was incorporated into CaO structure. The effects of CaO:Ca12Al14O33 ratio on the characteristics of the new absorbents and on their performance in  sorption-enhanced steam reforming of ethanol were analyzed. The results obtained indicate that the absorbent 85% CaO – 15% Ca12Al14O33 had significantly improved cyclic reaction stability. Additionally, it was proved that with this adsorbent CO purity on wet basis was lower than 2 %, making it possible to attain in only one reaction stage the CO purity obtained after de WGS reactor.
BUTENEDIOLS PRODUCTION FROM ERYTHRITOL ON Rh PROMOTED CATALYST
Authors: Virgilio Emanuel Martín , Padró Cristina Liliana , Sad Maria Eugenia
Published: March 2021

The C-O hydrogenolysis of Erythritol to Butanodiols was studied in aqueous solution at 473 K and 25 bar of H2 using Rh/ReOx/TiO2 and the monometallic Rh/TiO2 and ReOx/TiO2 catalysts. The solids were characterized by temperature programmed reduction (TPR), TEM and XPS. TPR and XPS showed that ReOx species are close to Rh particles leading to reduction at lower temperature than Re on monometallic catalyst. However, some segregated Rhenium species were suspected by TPR profile for the bimetallic catalyst and detected by TEM.  Re/TiO2 exhibited low activity forming only products from dehydration and epimerization. Although Rh/TiO2 showed high activity (total conversion at 14 h), was more selective to C-C cleavage leading to lower carbon products. Rh/ReOx/TiO2, showed instead, a good activity and selectivity towards C-O hydrogenolysis route yielding 37.5% of Butanodiols. Activation energy and reaction orders on ERY (0.58) and H2 (0.53) were estimated from experiences made at different reaction conditions
BAYESIAN OPTIMIZATION OF CRYSTALLIZATION PROCESSES TO GUARANTEE END-USE PRODUCT PROPERTIES
Authors: Luna Martin Francisco , Martinez Ernesto Carlos
Published: March 2021

For pharmaceutical solid products, the issue of reproducibly obtaining their desired end-use properties depending on crystal size and form is the main problem to be addressed and solved in process development. Lacking a reliable first-principles model of a crystallization process, a Bayesian optimization algorithm is proposed. On this basis, a short sequence of experimental runs for pinpointing operating conditions that maximize the probability of successfully complying with end-use product properties is defined. Bayesian optimization can take advantage of the full information provided by the sequence of experiments made using a probabilistic model of the probability of success based on a one-class classification method. The proposed algorithm’s performance is tested in silico using the crystallization and formulation of an API product where success is about fulfilling a dissolution profile as required by the FDA. Results obtained demonstrate that the sequence of generated experiments allows pinpointing operating conditions for reproducible quality.
QUALITY PARAMETERS AND DRYING KINETICS OF ULTRASOUND PRETREATED FERMENTED BLACK TABLE OLIVES
Authors: Aydar Alev Yüksel
Published: March 2021

The effect of ultrasound (US) pretreatment on microwave drying parameters including drying rate, moisture ratio and effective diffusivity and quality properties such as total phenolic and color parameters (L*, a*, b*, C, ΔE and H°) of black table olive slices were determinated. 10 minutes ultrasound pretreatment decreased drying time of black table olive slices by 31.81%, 41.37% and 42.85% compared to control samples dryed at 180, 450 and 800 W, respectively. Weibull and Diffusion models could precisely fit the drying behavior of black table olive slices (R2 > 0.9950). Microwave drying  had a negative effect on phenolic contents of olives, whereas  US pretreatment preserved phenolic compounds and enhanced the color parameters of samples. Higher effective diffusivity (Deff) values were obtained when the drying was combined with US pretreatment. Microwave drying with ultrasound pretreatment could improve drying process, since it accelarated drying rate and preserved the phenolic content and color parameters.
DE-ORBIT BEHAVIORS OF NANOSECOND LASER DRIVING SMALL SCALE SPACE DEBRIS IN LOW EARTH ORBIT
Authors: Fang Yingwu
Published: March 2021

The aim of this article was to address the de-orbit behaviors of space-based laser driving small scale space debris in low earth orbit (LEO) based on different orbit and laser parameters in coplanar/non-coplanar conditions. The de-orbit model of space-based laser irradiating small scale space debris was established, the de-orbit rules of irradiation angle and irradiation distance with action time in different orbital inclination and right ascension of the ascending node (RAAN) were investigated by numerical simulations, and the change rules of the perigee altitude with the number of laser pulses were discussed in different orbital inclination and RAAN. As a result, the clearance window of removing small scale space debris was described in detail. These results of numerical simulations will provide theoretical guide for designing clear schemes and selecting efficient parameters.
IDENTIFICATION OF AROMA COMPOUNDS OF DRIED AND FRESH THYME (THYMUS VULGARIS L.) BY GAS CHROMATOGRAPHY-OLFACTOMETRY AND GAS CHROMATOGRAPHY-MASS SPECTROSCOPY ANALYSIS
Authors: Yildiz Gulcin , Cox Ginnefer , Moran Linda
Published: March 2021

This study was conducted to determine aroma compounds of oven-dried thyme and fresh thyme and investigate the drying effect in key aroma compounds of thyme. Fresh thyme was purchased and utilized for two functions. The first function was for the application of drying methods (fresh thyme was oven dried at 50°C), and the second function to analyze the fresh thyme. After applying solvent direct extraction, volatile compounds were isolated. According to Gas Chromatography-Olfactometry (GC-O) and Gas Chromatography-Mass Spectroscopy (GC-MS) analysis results, lower amount of volatile compounds for dried thyme were identified, while more volatile components were present in fresh thyme.
REPLENISHMENT POLICY FOR A PROCESSING SYSTEM WITH STOCHASTIC CONSTRAINTS, DISCOUNT AND IMPERFECT ITEMS
Authors: Momeni S. , Afshar-Nadjafi B.
Published: March 2021

In this paper, a processing system with multiple products, single-vendor and single-buyer is considered to maximize the inventory system’s profit. In order to be more suit for real-world applications, this model contains five stochastic constraints including backordering cost, space, ordering, procurement, and available budget. It is assumed that orders are subjected to quantity discount and also imperfect goods are permitted. The price of the perfect and imperfect goods are assumed to be different. The imperfect goods are assumed to be returned to the system for rework process. The objective is to find the optimal order quantities of products such that the total inventory profit to be maximized while satisfying all the constraints. The problem is formulated as a mixed integer nonlinear programming problem. Two algorithms, based on GA and GRASP are developed to solve the resulting model. Performance of the algorithms are analyzed based on 45 numerical examples with different sizes.
CHINA'S EXPERIENCE IN ORGANIZING COOPERATIONS IN FARMS
Authors:   Bukhara State University of the Repubic of Uzbekistan, Abdulloev Asliddin Junaydullaevich
Published: March 2021

This article highlights the specific features of cooperative relations in agriculture, the need for their formation and development. It considers the ways of solving problems on the basis of the Chinese experience. In the future, the process of liquidation of farms will naturally continue to consider them in the development of the organization can be considered
FREE OSCILLATIONS OF PIPELINES LIKE THIN CYLINDRICAL SHELLS WITH REGARDS TO INTERNAL PRESSURE
Authors:   Bukhara State University of the Repubic of Uzbekistan, Esanov Nuriddin Kurbonovich
Published: March 2021

The paper deals with the free oscillations of pipelines as thin cylindrical shells with regard to internal pressure. The pipeline is presented in the form of a closed cylindrical shell with a radius of the midline of the cross section. The material is considered isotropic with density, modulus of elasticity, and Poisson’s ratio
ABOUT THE L ABOUT THE LANGUAGE OF THE WORK «GULIST GE OF THE WORK «GULISTONI BIT-TURKIY»
Authors:   Bukhara State University of the Repubic of Uzbekistan, Saidov Yakub Siddikovich
Published: March 2021

The article investigates some lexical-semantic and linguistic-poetic peculiarities of one of the important written sources of the XIVth century “Gulistony bit-turkiy” by Sayfie Saroyi. It should be noted that the linguistic features of this written source, which plays an important role in the history of the Uzbek literary language, the contribution of the talented poet and translator Sayfi Sarayi in the development of the Uzbek literary language have hardly been studied in Uzbek linguistics. The study of the poet's work in various aspects is important not only for Uzbek linguistics, but also for Turkology.
ANALYSIS OF THE PROCESSES OF DEVEL SIS OF THE PROCESSES OF DEVELOPMENT OF FOREIGN T OF FOREIGN TRADE IN UZBEKISTAN
Authors:   Center for Retraining and Statistical Research of the State Statistics Committee of the Republic of Uzbekistan, Khamraev Zafar Mamasaidovich , Kakhkhorov Otabek Siddikovich ,   Bukhara State University of the Republic of Uzbekistan
Published: March 2021

This article analyzes the development of foreign trade in Uzbekistan and the factors influencing it. It was noted that in order to improve foreign trade in Uzbekistan, it is necessary to carry out a number of tasks and find new markets for the sale of domestically produced products in other parts of the world and to export products to these markets. Proper and timely resolution of these issues will ensure the stability of foreign trade in Uzbekistan.
DYNAMICS OF VIBRA AMICS OF VIBRATIONAL MOTION OF THE DOM TION OF THE DOMAIN BORDER AIN BORDER IN THE FERRITE GRADE OF Tb3Fe5O12
Authors:   Bukhara State University of the Repubic of Uzbekistan, Dzhuraev Davron Rakhmonovich , Sharipov Mirzo Zokirovich , Khaitov Dilshod Ergashovich , Ergasheva Nilufar Mansurovna
Published: March 2021

The magneto-optical method is used to study the dynamics of the oscillatory motion of domain boundaries in a Tb3Fe5O12 garnet ferrite in the temperature range 200-295K, including the magnetic compensation point of this ferrimagnet Fs ≈ 249K. To interpret the experimental results obtained, a theoretical model of magnetic resonance of domain boundaries is proposed, according to which when the temperature approaches the compensation point, the mass of the domain boundaries tends to infinity, and the resonance frequency tends to zero
THE THEORETICAL BASIS OF STRA TICAL BASIS OF STRATEGIC M TEGIC MANAGEMENT OF HIGHER EDUCATION SYSTEM
Authors:   Bukhara State University of the Repubic of Uzbekistan, Kakhkhorov Otabek Siddikovich
Published: March 2021

The article discusses the theoretical foundations of strategic management of the higher education system. In the case of strategic management, the organization looks at the present from the future to achieve the goals set in the future due to changes in the environment and living conditions of the organization, identifies and implements current actions that provide a certain future for the organization. Strategic management has advantages as well as disadvantages and limitations, which show that this type of management, like other types, does not have universal application in solving any tasks and problems
ON THE POIN ON THE POINT SPECTRUM OF OPERA TRUM OF OPERATOR MATRIX COMIMG T X COMIMG TO A A DIAGONALIZABLE MATRIX
Authors:   Bukhara State University of the Repubic of Uzbekistan, Rasulov Tulkin Khusenovich , Mustafoeva Zarina Erkin kizi
Published: March 2021

It isconsidered herethediagonalizable operatormatrix . The essential and point spectrum of are described via the spectrum of the more simpler operator matrices. If the elements of a matrix are linear operators in Banach or Hilbert spaces, then it is called a block-operator matrix. One of the special classes of block operator matrices are the Hamiltonians of a system with a nonconserved number of quantum particles on an integer or noninteger lattice. The inclusion for the discrete spectrum of is established.
APPROXIMATION – A ME TION – A METAPHORICAL IN APHORICAL INTERPRETATION IN THE TION IN THE NOMINATION REPRESEN TION REPRESENTING A INDEFINI TING A INDEFINITE / DEFINI TE / DEFINITE CATEGORY
Authors:   Termez State University of the Republic of Uzbekistan, Makhmaraimova Shokhista Tukhtashevna
Published: March 2021

The article discusses the role of metaphorical interpretation in the nomination process and the theory of nomination in general, the essence of the approximation nomination and the metaphor involved in this process is also described. Approximators are mainly adapted for artistic speech, in which the author demonstrates individual speech and the perception of the world accordingly. On the basis of the category of clarity / uncertainty, it refers to the basic features used to convey to the reader his views, opinions, and reflections, and expresses parts of the conceptual world of this author.
IMPLEMENTASI SISTEM PAKAR UNTUK MENDIAGNOSA PENYAKIT DENGAN GEJALA DEMAM MENGGUNAKAN METODE CERTAINTY FACTOR
Authors: Kurniadi, Sismarwiyanti Adi
Published: March 2021

Sistem pakar untuk mendiagnosa penyakit dengan gejala demam merupakan sistem yang akan dirancang sebagai alat bantu untuk mendiagnosa penyakit  dengan gejala yang telah ditentukan dengan basis pengetahuan yang dinamis. Sistem pakar  merupakan sistem komputer yang dapat melakukan penalaran dari seorang pakar dengan keahlian pada suatu bidang tertentu. Sistem yang akan dibangun untuk mendiagnosa penyakit dengan gejala demam, akan mengguanakan metode Certainty Factor. Metode ini diantaraya akan memberikan kemungkinan penyakit yang dialami dan prosentase keyakinan. Tahapan pembangunan sistem pakar ini dimulai dengan mengakuisisi pengetahuan dari dokter yang ahli dalam bidang gejala demam kemudian membangun basis pengetahuan dan memberikan nilai Certainty Factor  pada setiap gejala yang terkait dengan penyakit gejala demam. Pada tahapan akhir, sistem akan memberikan informasi mengenai kemungkinan penyakit yang dialami berdasarkan persentase keyakinan serta nilai keyakinan yang diberikan oleh user dalam menjawab pertanyaan selama sesi konsultasi ketika menggunakan sistem. Sistem yang dibangun akan diimplementasikan di Puskesmas Megang Sakti guna untuk mempermudah dokter dalam mendiagosa penyakit.
RANCANG BANGUN SISTEM E-TRACER STUDY ALUMNI UNTUK MENGETAHUI OUTCOME PENDIDIKAN BERBASIS WEB MOBILE
Authors: Agustin, Deni Apriadi Dini
Published: March 2021

Alumni merupakan bagian penting yang harus digali informasinya, untuk mengetahui eksistensi mereka setelah lulus dari lembaga pendidikan. Tracer study merupakan studi pelacakan alumni yang bertujuan untuk mengetahui sejauh mana pencapaian visi dan misi dari sebuah lembaga pendidikan. Hal ini juga dilakukan untuk mengetahui kegiatan yang alumni lakukan dan memantau perkembangan \ kemampuan mereka dalam berkompetensi di dunia kerja. Pada Fakultas Pertanian Universitas Musi Rawas tracer study memiliki masalah pada saat pengumpulan data. Selain itu masalah terletak pada responden/alumni di mana mereka malas mengisi kuisioner dengan alasan masing-masing. Oleh sebab itu dibutuhkan sistem e-tracer study alumni yang terintegrasi dan berjalan secara online yang memungkinkan alumni melakukan pengisian kuisioner  secara online. Sistem ini berbasis web mobile sehingga dapat diakses melalui perangkat mobile, kapan saja dan dimana saja selama terhubung dengan jaringan internet. Dengan berbasis web mobile nantinya dapat menarik responden secara cepat, mudah, dan efisien sehingga feedback pun meningkat. Dengan sistem ini diharapkan nantinya dapat memudahkan pelaksanaan tracer study dan sekaligus sebagai media untuk sharing informasi seputar dunia kerja dan berita lainnya.
PENERAPAN TEKNIK KLASIFIKASI DALAM SISTEM PENDUKUNG KEPUTUSAN PENERIMAAN RASKIN MENGGUNAKAN METODE FUZZY TOPSIS
Authors: Fitri Ayu Ramadhani
Published: March 2021

Penyaluran bantuan pangan mulai dilaksanakan pada tahun 2017 di 44 kota yang memliki akses dan fasilitas memadai. Secara bertahap, bantuan pangan akan diperluas ke seluruh kota dan kebupaten sesuai dengan persiapan sarana dan prasarana penyaluran bantuan tersebut. Raskin merupakan salah satu program subsidi pangan pokok dalam bentuk beras yang diperuntukkan untuk keluarga miskin sebagai upaya yang dilakukan pemerintah dalam meningkatkan ketahanan pangan. Keluarga penerima Raskin adalah keluaraga yang berpendapatan rendah (miskin dan rentan miskin) atau disebut dengan Rumah Tangga Sasaran (RTS). Program ini bertujuan untuk mengurangi beban pengeluaran Rumah Tangga Sasaran (RTS) melalui pemenuhan sebagian kebutuhan pokok dalam bentuk beras (Ombi Romli,2017). Fuzzy merupakan sebuah ruang input yang menjadi sebuah ruang output yang terdiri dari beberapa kemungkinan, berbeda dengan logika digital atau Boolean yang hanya memiliki dua kemungkinan saja, sedangkan topsis merupakan salah satu metode yang cukup akurat, karena tidak hanya memperhitungkan mengenai jarak ideal maksimum, namun juga mencari jarak ideal minimum. Pada kelurahan ponorogo saat pendataan belum efektif, karena pada kenyataannya proses pendataan kelayakan penerima raskin tidak berdasarkan pada kriteria yang ada. Untuk itu, dibutuhkannya sebuah sistem yang dapat membantu petugas kelurahan dalam hal proses penentuan kelayakan penerima raskin.
PERANCANGAN WEBSITE PENERIMAAN SISWA BARU DENGAN MENGGUNAKAN METODE WATERFALL
Authors: Anggraini Inda
Published: March 2021

Perkembangan teknologi yang meluas membuat organisasi, perusahaan dan juga institusi berlomba dalam menggunakan teknologi untuk mencapai tujuan yang diharapkan. Tujuan organisasi terutama instansi pendidikan tersebut adalah untuk mendapatkan peserta didik sesuai dengan kriteria untuk menjadi peserta didiknya. Penerimaan Peserta didik baruadalah  proses menyeleksi calon Siswa untuk mendapatkan peserta didik sesuai dengan kriteria yang telah ditentukan oleh sekolah untuk menjadi Siswa didiknya. Penelitian ini bertujuan untuk membangun website Penerimaan Siswa Baru (PSB) pada Madrasah Tsanawiyah Negeri (MTsN) Jambat Balo dengan menggunakan bahasa pemrograman PHP (Hypertext PreProcessor) dan MySQL sebagai Database tool. Metode pengembangan yang peneliti gunakan adalah  SDCL Air Terjun (Waterfall) yang disebut juga model sekuensial linier (sequential linier) Dengan adanya sistem ini diharapkan dapat meningkatkan proses pelayanan penerimaan Siswa baru dan dapat mempermudah panitia dalam memberikan pelayanan bagi calon Siswa sehingga dapat mendukung keberhasilan suatu sekolah dalam mencapai tujuannya.
A “Comer” or a “Second-Rater”?
Authors: Ward Philip
Published: March 2021

Michael Arlen was one of the most successful popular novelists of the interwar period, even appearing on the cover of Time magazine in 1927. Best known in his day for the novel The Green Hat (1924), he lived intermittently in Paris in the later 1920s, where he encountered American expatriates, including Ernest Hemingway and F. Scott Fitzgerald. This article examines his relationship with Fitzgerald, presenting the material in chronological order. The relationship took two forms: meetings between the two men (only two of which are documented, although they must surely have met on other occasions as well) and reception by Fitzgerald of Arlen’s work. Fitzgerald showed early familiarity with Arlen’s writings, even suggesting that Arlen was in some sense his successor and someone from whom he and Hemingway might learn. At the same time, he identified faults with Arlen’s writing and by the end of the 1920s declared him “second-rate.” Arlen himself borrowed motifs from The Great Gatsby for his novel Men Dislike Women (1931) but left no memoir of his personal contacts with Fitzgerald.
“An Emergency Job Well Done” Friends of Freedom Libraries and the Mississippi Freedom Libraries
Authors: Stauffer Suzanne M.
Published: March 2021

During the civil rights movement, more than eighty Freedom Libraries were established throughout the Deep South, with the vast majority in Mississippi. They provided library services and materials for many Black citizens who had no access to public libraries that, even if desegregated, found ways of refusing service. In October 1964 the Freedom House in Vicksburg was bombed and its Freedom Library effectively destroyed. Volunteer librarian Bryan Dunlap wrote to his father, Joseph Dunlap of Leonia, New Jersey, for assistance in rebuilding the library. Dunlap responded by sending eight boxes of books and forming the Leonia-Vicksburg Committee to support the work in Vicksburg. Early the next year, members of the Committee and others formed the Friends of Freedom Libraries “to disseminate information about these libraries and to encourage assistance for their needs.” This article examines their motivations, activities, and results utilizing social dominance theory and identity theory.
Instrucción basada en esquemas para la enseñanza de la resolución de problemas aditivos en estudiantes con trastorno del espectro autista: un estudio de caso
Authors: Polo-Blanco Irene , González López María José
Published: March 2021

En este artículo se examina la efectividad de un enfoque de Instrucción Basada en Esquemas para mejorar el rendimiento matemático de resolución de problemas verbales aditivos por un estudiante con trastorno del espectro autista. Se llevó a cabo una intervención adaptada a las necesidades educativas del alumno. Este mostró una mejoría en la resolución de problemas verbales aditivos de cambio con incógnita en las tres cantidades (inicial, cambio y final) en dos aspectos: la identificación de la operación aritmética y la obtención del resultado numérico correcto. El estudiante abandonó sus primeras estrategias informales, que fueron sustituidas por hechos numéricos aditivos. Además, generalizó las habilidades adquiridas a problemas verbales de dos operaciones. Los logros se mantuvieron cuatro semanas después de finalizar la instrucción.
Leszek Kołakowski and the Revisionists of Marxism: Their Stance on the Socio-Political System of the Polish People’s Republic, 1958–1968
Authors: Kapica Bartłomiej
Published: March 2021

This article presents how Marxist revisionists in the Polish People’s Republic, with Leszek Kołakowski as their most prominent representative, as well as members of the so-called Warsaw School of the History of Ideas, perceived the country’s socio-political system and how their views evolved. It shows how the policy of repressing revisionism, introduced by Władysław Gomułka after his return to power in October 1956, shattered the hopes and expectations of left-leaning intellectuals in Poland. They shared with each other their intimate, straightforward opinions, stripped of all illusions, which they could not express in the public sphere. Their disappointment with the communist party’s policy and the critical approach of its ideology led them to focus on new themes. Society, its problems, the mood of the people and how it could be interpreted arose as important issues. Finally, the experience of March 1968 once again proved that intellectuals’ attention should be on society rather than on the communist party.
Implications of COVID-19 Lockdown on South African Business Sector
Authors: Ede Chucks I , Masuku Mfundo Mandla , Jili Nokukhanya N
Published: March 2021

The COVID-19 pandemic in South Africa spelt untold adversity on many businesses in the country. This is attributable to the precautionary measures implemented by the South African government to contain the ferocious disease spread across various levels in the society. This article examined the many implications of the pandemic on the business sector in South Africa through the period just before June 2020. The article adopted a qualitative approach to critically examine the implications of the COVID-19 pandemic on the business sector in South Africa. It utilised Statistics South Africa’s reports and contemporary literature on the effects of COVID-19 on the business sector which was used as a source of reference. The statistical evidence is based on experimental data for May 2020, as derived from over a thousand registered businesses operating within the formal sector from various industrial groupings in South Africa. The period under review is remarkable because the business's effect of the pandemic became visibly alarming while the lockdown phases were reduced from Level 5 to Level 4 within the period. The private sector of the economy, known for its huge economic sustenance of most of the country’s labour force, was already at the firing line as all ‘nonessential’ businesses succumb to government’s strict regulations on socioeconomic activities during the phased lockdowns. The hitherto struggling economy, barely sustained by this sector, eventually caved in with over half of its gross domestic product, shrinking attributable to the unparalleled adverse effects that attended the dreaded pandemic. Although government is still battling with the nation’s economic recovery process, many businesses counted their losses from the first few months of the lockdown, as portrayed by plentiful evidence from the national statistical body.
Investor Sentiment by Money Flow Index and Stock Return
Authors: Phuong Lai Cao Mai
Published: March 2021

Factors affecting stock prices have been studied by many scholars on different stock markets. However, the number of empirical studies applying technical analysis indicators to measure investor sentiment is quite limited. To explore this interesting topic, this study uses the Money Flow Index (MFI) indicator to measure an investor's sentiment by various thresholds and to test its effect on the excess return on Vietnam stock market. Data series including market, interest rate, finance and transaction data of 138 companies listed on the Ho Chi Minh City Stock Exchange from 2015 to June 2020 are used in the equations Regression. The study's findings show that, after controlling for market factors, individual characteristics and liquidity of each company, investor sentiment as measured by the MFI indicator still has a significant impact on the return of stocks at all thresholds. In addition, when the MFI value area is near the starting and ending point of the scale (less than 20, greater than 80), the regression coefficients of these two thresholds and control variables both increase compared to the remaining models, return and significant effect to the excess return of the securities.
Solution of an open reality based word-problem in two secondary schools
Authors: Svitek Szilárd , Szitányi Judit , Ambrus Gabriella
Published: March 2021

This survey through an open reality based word problem is intended to assess - in two secondary schools in Komárom (Hungary) and in Komarno (Slovakia, Hungarian name: Révkomárom) in grade 10 - the ability of students to realize openness of a task. The comparison is justified by the fact that the language of teaching is Hungarian in both secondary schools, but with different curricula. This survey is related to the Content Pedagogy Research Program by the Hungarian Academy of Sciences. It is preceded by several surveys with a word problem (Pocket Money) of the third author and led by her between 2012 and 2015, and within that project in 2017 within a large sample test, among about 1500 students and university students in Hungary (?, ?) (?, ?). In our research we wanted first to assess how openly work students in two schools of the two cities mentioned in solving the same task. The answer to this question was similar to the large sample test results, so most of the students worked in a closed way, when solving this word problem. So we went on and tried to explore how students thought about their own solution given to this task, through mixed-type interviews.

Subject Classification: 97D70, 97F90, 97D50, 97M10
Technical and Field Evaluation of Tractor Operated Frontal Pre-pruner for Kinnow Mandarin (Citrus reticulata) and Guava (Myrtaceae) Orchard
Authors: Singh Manjeet , Chandel Rupinder , Thakur Surinder Singh
Published: March 2021

Fruit tree pruning is the cutting and removing of selected parts of a fruit tree. It spans through quite a number of horticultural techniques. Pruning includes cutting branches back, sometimes removing smaller limbs entirely and more so the removal of young shoots, buds and leaves. Established orchard practice of both organic and nonorganic types typically includes pruning. Pruning can control growth, remove dead or diseased wood, and stimulate the formation of flowers and fruit buds. Pruning and training young trees improves their later productivity and longevity and can also prevent later injury from weak crotches or forks (where a tree trunk splits into two or more branches) that break from the weight of fruit, snow, or ice on the branches. However, the efficiency of pruning methods is also important. Manual pruning has constraints like lower field Capacity and incomplete pruning in case of tall trees. Therefore, a tractor operated 1-row frontal pre-pruner with electro hydraulic control was tested for Kinnow Mandarin and Guava orchards. The time involved for top and side pruning was 23.30 and 46.80 min/acre, respectively and there was 99.32-99.38% saving in time as compared to manual pruning.
Reclasseren: toezicht en hulpverlening
Authors: Poort René , Hagtingius Bart , Bosker Jacqueline
Published: March 2021

Probation: supervision and assistance. Some considerations with Th. van Haaren: Probation, supervision or assistance?

In the 1980s there was a lot of discussion about whether monitoring special conditions should be a probation task, and whether this can be combined with offering help and assistance. The authors show that this discussion has been settled by introducing a specific knowledge base for probation work. They outline a number of important developments in recent decades: the focus on risk and the enforced framework, and the great influence of new technology. Nevertheless, an important basis for probation remains unchanged: the quality of the contact between probation officer and client.
‘Zittingzaal van den Kinderrechter’
Authors: Peterse Coosje
Published: March 2021

‘Courtroom of the juvenile judge’ Spadework in criminal law concerning minors

In 1932 the court room of the Juvenile Judge in Amsterdam was redesigned and this work was marked as 'spadework'. In 2021 in a joined project of law student and art students ‘Design of Justice’ a concept for a court room of the future is developed. Again 'spadework'? In this article the author reflects on this and other current developments in the field child-friendly justice in criminal youth cases.
Education on the Roma Genocide in the Second World War in the Republic of Croatia
Authors: Vojak Danijel
Published: March 2021

The Roma population has been living in Croatian territories for more than six centuries and during that period was mostly persecuted by state and local authorities who sought to assimilate them. Such antigypsyism political practice was not unique only for the Croatian territory but was practiced in most other European countries. After World War II there was no commemoration and recognition of Roma victims in most European countries, including socialist Croatia (Yugoslavia). Such marginalization of the culture of remembrance of Roma war victims was reflected in the lack of education on this subject in the Croatian education system, where it is mostly mentioned in only a few words. The paper focuses on the analysis of how the issue of Roma suffering in the Independent State of Croatia (NDH) and Europe is (un)integrated into the Croatian education system.
Conditions of effective self-management. “Manage yourself, be creative, achieve goals”
Authors: Wełyczko Lesław
Published: March 2021

The article addresses what seems to be the critical aspects related to the most important competence of a human being in the 21st century – the competence to manage oneself. Nowadays, when life and civilization and technological development have accelerated unbelievably, people find it increasingly challenging to fulfill the social roles entrusted to them. That applies to everyone, but especially to those who have to manage (lead) other people or even entire teams, often forgetting about themselves, their needs, life priorities, and personal development. One should be able to wisely and rationally plan professional development in his/her personal life so as not to lose himself/herself entirely in the surrounding reality, being absorbed only in professional matters and others’ problems.
This article indicates the most critical aspects that should be taken into account when planning personal and socio-professional development since only in this way can one feel the fulfillment of both in personal (family) and social and professional life.
The issues of command of the Land Component in the operation
Authors: Więcek Wojciech
Published: March 2021

The article aims to indicate scientifically justified solutions for the functioning of the command post of the Land Component and the circulation of information at that post. It explains the specificity of commanding the Land Component, which is reflected in the existence of three parallel types of planning: current, short-term, and long-term Based on the available subject literature, many conclusions about the essence of commanding the Land Component are presented. In the author’s opinion, they may constitute a starting point for further research on the issues of commanding the Land Component in the future prospective operational environment.
Endokrynologiczne powikłania nowych terapii przeciwnowotworowych
Authors: Miner Michał , Elbaum Michał , Jawiarczyk-Przybyłowska Aleksandra , Kubicka Eliza
Published: March 2021

Streszczenie

Badanie i poznawanie skomplikowanych mechanizmów molekularnych i immunologicznych procesów nowotworowych umożliwia wprowadzanie nowych terapii przeciwnowotworowych. W leczeniu chorych na nowotwory coraz częściej stosuje się terapie celowane molekularnie inhibitorami kinaz tyrozynowych i inhibitorami mTOR oraz immunoterapię z użyciem inhibitorów punktów kontrolnych CTLA-4 (cytotoxic T-cell antigen-4) i PD-1/PD-L1 (programmed death receptor 1/programmed death ligand 1). Nowe leki przeciwnowotworowe zajmują miejsce konwencjonalnej chemioterapii i znalazły już zastosowanie w zwalczaniu wielu nowotworów m.in. raka tarczycy, wątrobowokomórkowego, niedrobnokomórkowego raka płuca, nerki, pęcherza moczowego, czerniaka, raka piersi, ostrej i przewlekłej białaczki szpikowej. Stosowanie tych leków jest mniej toksyczne od klasycznej chemioterapii, ale może wywoływać działania niepożądane ze strony układu pokarmowego, sercowo-naczyniowego, oddechowego, skóry, a także powikłania endokrynologiczne. Większość działań niepożądanych nowych terapii przeciwnowotworowych to zaburzenia łagodne i umiarkowane, ale zdarzają się również ciężkie i zagrażające życiu. Endokrynopatie są jednymi z częstszych działań niepożądanych omawianych metod leczenia. Mogą dotyczyć wielu gruczołów wydzielania wewnętrznego (przysadka, tarczyca, przytarczyce, nadnercza, trzustka) i wywoływać zarówno przemijające jak i trwałe zaburzenia.

W artykule wykorzystano informacje z bazy PubMedu o endokrynologicznych powikłaniach nowych terapii przeciwnowotworowych.
Analysis of sperm chromosomes in six carriers of rare and common Robertsonian translocations*
Authors: Olszewska Marta , Wiland Ewa , Wanowska Elzbieta , Huleyuk Nataliya , Chernykh Vyacheslav B. , Zastavna Danuta , Kurpisz Maciej
Published: March 2021

Introduction

Robertsonian translocation (RobT) is the central fusion of the long arms of two acrocentric chromosomes, leading to 45 chromosomes in humans. The most common ones are rob(13;14) and rob(14;21) (91%). Other types of RobT are so-called rare cases. In the general population RobTs occur with a frequency of approximately 0.123%, but among men with reproductive failure this value rises 9-fold. Infertility in RobT carriers is associated with the formation of unbalanced spermatozoa resulting from segregation of the chromosomes involved in trivalent during the meiotic prophase. In spermatozoa of many RobT carriers an increased level of chromosomal aneuploidy is observed.

Materials and Methods

We examined the hyperhaploidy level of chromosomes 7, 9, 18, 21, 22, X and Y in spermatozoa of 6 RobT unrelated carriers: two carriers with rare rob(13;15), one with rare rob(13;22), and three of the common rob(13;14). Results were compared with the control data from a group of 7 fertile men with a normal karyotype. Fluorescent in situ hybridization (FISH) was applied.

Results

We found an increased level of sperm aneuploidy regarding at least one of the analyzed chromosomes in each of the carriers, while in rare RobTs interchromosomal effect (ICE) was observed. Meiotic segregation pattern of a rare rob(13;15) carrier revealed the 76% of normal /balanced spermatozoa.

Disucussion

Due to the relatively high population frequency of RobTs, their influence on reproductive failure, hight risk of imbalancement in prenatal diagnosis (7%), and small amount of data for rare RobTs, each newly characterized case is valuable in genetic counseling.
Physical fitness of rhythmic gymnasts depending on age and level of sports achievements
Authors: Sterkowicz-Przybycień Katarzyna , Fundament Paula
Published: March 2021

Aim. The aim of this study was to compare the indices of physical development, frequency and time duration of training, and the results of physical fitness tests depending on age and level of sports achievements among rhythmic gymnasts. Materials and methods. The study comprised 36 rhythmic gymnasts: Gr1 (n=13, 9.0±1.0 years), Gr2 (n=11, 11.36±0.5 years), Gr3 (n=12, 14.27±0.7 years). After standardised sports interview, the groups with lower level of sports achievements (LSL) (n=20) and higher level of sports achievements (HSL) (n=16) were defined. Measurements of body height and mass were performed. The study participants performed the broad jump test, Unipedal Stance Test with Eyes Open (UPST-EO) and Eyes Closed (EC), and the rhythmic gymnastics specific coordinative test with a hoop. Results. The number of training sessions per week and their duration did not depend on age. The results of the broad jump were significantly different for groups Gr1, Gr2 and Gr3 (F=27.02, p<0.01). The average results for the 3 trials of UPST-EO in Gr2 and Gr3 were better than in Gr1 (F=5.51, p=0.008). The average result of UPST-EC for Gr3 was also significantly better than for Gr1 (W=9.53, p=0.008). The hoop test showed differences for all age groups Gr1<Gr3<Gr2 (F=11.55, p<0.001). HSL athletes were significantly different from LSL in frequency and duration of training, average results from 3 trials of UPST-EO, UPSTEC and the best result of UPST-EC (p<0.05). Conclusions. Differences between groups in physical fitness tests results depended on gymnasts’ age and showed their usefulness in the control of training at a particular stage of sports development. HSL gymnasts predominated over LSL in results of the one-leg standing position postural balance test with eyes opened and closed. The detected differences can be useful for coaches in identifying and developing gymnastic talent.
Study of Mechanical Properties of Alkali Treated SZF/SF/VE Hybrid Composites under Wet Condition
Authors: AYYANAR Athijayamani , GP Ramkumar , AZIZ BATCHA Alavudeen , MANI Thiruchitrambalam
Published: March 2021

Mechanical properties of vinyl ester hybrid composites reinforced with alkali treated Smilax zeylanica and sisal fibers were studied at wet condition in the present communication. Hybrid composites were fabricated by using a simple hand lay up technique based on three different fiber loading of 25, 35, and 45 wt.% with alkali treated fibers. Hybrid composite specimens were then subjected to the water absorption test to observe the behaviours of composite specimens at wet condition under mechanical loads such as tensile, flexural and impact. Water absorption test was carried out in two ways at distilled water environment at room temperature. First way test was conducted for 10 days to observe the percentage of water particle absorption of hybrid composites. Second way test was performed for 5 days to determine the mechanical properties of hybrid composites at wet condition to observe its durability when they are used in outdoor applications. Mechanical properties of hybrid composite specimens at wet conditions were compared with the dry composite specimens. Experimental results showed that the percentage of the water particle absorption in the alkali treated hybrid fiber composites is lower as compared to the untreated hybrid fiber composites. Mechanical properties of alkali treated hybrid fiber composites at wet condition are slightly reduced as compared to the treated hybrid fiber composite at dry condition. As a result, it is observed that the resistance for the penetration of the water particles is higher for the alkali treated smilax zeylanica and sisal fibers reinforced vinyl ester hybrid composites. The fracture surfaces of the hybrid composite specimens were examined by scanning electron microscope to understand the effects of water absorption on the mechanical properties.
Die Geschichte vor Corona: Erinnerung, Erfahrung und Emotion
Authors: Hitzer Bettina
Published: March 2021

Die Reaktionen auf die Corona-Pandemie reichten von Schock über Negation bis hin zur Einschätzung, das lang Erwartete sei eingetreten. Der Aufsatz erklärt diese Reaktionen historisch, indem er sich zwei Aspekten zuwendet: erstens dem Zusammenspiel von Erinnerung, Zukunftserwartung und epidemiologischer Beobachtung sowie zweitens der Erfahrungs- und Emotionsgeschichte.