bluuebunny/crossref_metadata_2025 huggingface dataset:
Analisis Keterampilan Proses Sains Siswa Kelas XI IPA SMA Negeri 2 Pangkajene dalam Model Pembelajaran Inkuiri Terbimbing (Studi pada Materi Titrasi Asam Basa)
Authors: Faisal Faisal
Published: January 2024

This pre-experimental research aims to describe the student’s science process skill in guided inquiry learning model in the subject matter of acid and base titration. The research population were all students of class XI IPA SMA Negeri 2 Pangkajene consist of 4 class were 115 students. The research samples were 29 students of class XI IPA Archimedes SMA Negeri 2 Pangkajene. Science Process Skill data was collected by observation sheet, student worksheet, and lab report was observed during the learning process. The results of the descriptive analysis showed that the average percentage of science process skills of students with 9 indicators (asking questions was 77,01% classified good category, make hypotheses was 56,89% classified not good category, research plan was 100% classified very good category, using tools and materials was 75,82% classified good category, interpreting was 81,35% classified good category, measuring was 66,39% classified enough good category, calculating was 78,46% classified good category, predicting was 60,34% classified not good category and communicate the results was 88,08% classified very good category). Thises mean that the student’s science process skill of class XI IPA SMA Negeri 2 Pangkajene in guided inquiry learning model of the subject matter acid-base titration was 76,04% good category.
Pengaruh Macromedia Flash dalam Model Pembelajaran Kooperatif Tipe Numbered Heads Together (NHT) terhadap Hasil Belajar Siswa Kelas X SMAN 12 Makassar (Studi pada Materi Pokok Ikatan Kimia)
Authors: Madong Yanti , Sulastri Taty , Side Sumiati
Published: January 2024

The research is quasi experiment that aim to know the influence of using Macromedia Flash on cooperatif learning model type NHT to achievment of students of class X SMA Negeri 12 Makassar. The independent variable are NHT type cooperatif learning model with Macromedia Flash and without Macromedia Flash based in cooperatif learning model, and dependent variable is students’ achievment in chemical bonding main subject of learning. The populasi is whole student of X Grade SMAN 12 Makassar which consists of 8 classes. The sample include two classes such as X2 as an experiment class with 36 students and X3 class as a control class with 36 students The sampling technique is random with assumption that the population is homogeny. Data collection technique is obtained from objective test which consists of 20 items of multiple choice. The data analysis technique used are descriptive statistical analysis and inferential statistical analysis. The hypothesis test using t test shows that tcalculate > ttable = 2,97 > 1,67 on α ═ 0,05. Conclude that using Macromedia Flash on Cooperatif Learning Model Type NHT gives effected positive to toward student’s achievement of class X SMAN 12 Makassar on Chemical Bonding subject matter.
Pengembangan Model Pembelajaran Inquiri Dinterferensi Pendekatan Scientific untuk Meningkatkan Keterampilan Berpikir Ilmiah Siswa SMA
Authors: Jusniar Jusniar , Side Sumiati
Published: January 2024

The main objectives to be achieved from this research is to produce books Scientific learning model - Enquiry and supporting devices such as lesson plans, worksheets and valid assessment tools, practical and effective in improving students' scientific thinking skills. Instructional material used as the focus of this research is the solution of electrolyte and non-electrolyte that is presented in class X semester. Activity presents a real problem in the class is the first step of learning, so it is expected that students are able to analyze problems, hypothesize, collect the data and concluded through experimentation. This is not apart of the activities 5 M (Observe, ask, reasoning, Tried and Communicate) which is the scientific thinking activities of students. The development method used is Plomp (1997), which consists of four stages, namely; 1) The initial assessment by observation early in the school curriculum, the students and the state sylaby appropriate learning model; 2) planning draft of the model scientific - inquiry and materials suitable for development, 3) realization & Construction to develop the book model of scientific - inquiry together with learning devices namely lesson plans, worksheets and assessment tools skills of scientific thinking of students, while stage 4) implementation has not been done for I. year study the validity of test results from three experts to book models and devices obtained by each (book model = 3.23; RPP = 3.29; LKS = 3.19 and assessment tools = 3.10) total mean with a 3.20 average coefficient of expert judment index equal to one category is valid. Test the practicality of the model and the Scientific - Inquiry through perception questionnaires gained an average of 89.47% of students (32 students) who respond positively to the application of models and tools, and of the three chemistry teacher at SMAN 1 Bajeng average of 90.05% giving a positive response to the model and the device. Test the effectiveness evident from the test results show class completeness of 81.25% (26 students completed). Feasibility study can be seen from the observation of student activity associated with formulating problems, observe, ask questions, give argimen, formulate hypotheses, collect and data analyze, discuss, cooperation and conclude group average of 75.83%. Based on these two indicators show that the model and the device is effective to improve learning outcomes and scientific thinking skills.
Estimasi Kesalahan Pengukuran Berdasarkan CTT dan IRT Soal Tryout SBMPTN TPA Tahun 2018 di Kota Makassar
Authors: Ismail Indriani H
Published: January 2024

This research aims to estimate standard error of measurement with TCC and IRT approach and compare the most sensitive theory in estimating standard error of measurement about Tryout SBMPTN TPA Year 2018 in Makassar City. This research is descriptive - explorative research with quantitative approach. The subjects of this study were participants of SBMPTN tryout in 2018 in Makassar city as many as 455 examinee. Data source in this research is answer sheet of SBMPTN TPA trial tryout participants in Makassar City. The instrument used in this study, which is a matter of multiple choice of Academic Potential Test (TPA) consisting of 50 items. The result of standard error estimation based on CTT is SE.Meas = 2.95, SE.Est = 2.322 and SE.Pred = 3.743. While measurement error based on IRT is 0,349. IRT is more sensitive in estimating measurement error about Tryout SBMPTN TPA 2018 in Makassar city.
Penerapan Model Pembelajaran Kooperatif Tipe Teams Games Tournament (TGT) untuk Meningkatkan Aktivitas Belajar Peserta Didik Kelas X.3 SMA Negeri 5 Tanralili Maros
Authors: Kurniah Kurniah , Danial Muhammad , Ramdani Ramdani
Published: January 2024

This research was a classroom action research (CAR). The aimed was to find systematic steps of TGT learning model to increase the activity of student in X3 grade of senior high school 5 Tanralili Maros. This research was conducted in two cycles. The results showed that the steps in each stage of the learning model that can improve student learning activities were: (1) The class presenting stage conducted by explained the objective learning and associated the learning topics that have been studied previously by orally to students, (2) the group discussion stage conducted by divided students into the learning heterogeneous groups, instructed students to master the topic at home, instructed students to bring reading topics that related to the subject of discussion and explained to students the meaning of teamwork, (3) the group presentation stage conducted by provided students to convey the results of the discussion and instructed students to make a questions before presentation time began, (4) the game stage conducted by instructed students to solve the problems independently and to uphold the values of honesty, (5) the tournament stage conducted by provided students to represent their group at the tournament table with same scores game, (6) the awards stage conducted by giving the prizes to the best groups and provided motivation to the group not as a winner in order to try harder, (7) the conclusions stage done by students and teacher together, which the students concluded the topic must be based on learning objectives. By implementing these stages, the students learning activities increased by 32.50 %.
Formation of Tubular Aluminum Oxides by Local Electrochemical Anodization in Organic Electrolytes and Their Anti-Reflection Properties
Authors: Lazarouk S. K. , Dudich V. V. , Orekhovskaya T. I. , Sasinovych D. A. , Tomashevich L. P. , Ustimenko A. A. , Povzhik A. A. , Kalanda N. A. , Symonenko D. A. , Ivanyuta S. M.
Published: January 2024

Research has been carried out on the formation of tubular aluminum oxides by local electrochemical anodization in aqueous solutions of organic acids such as formic, citric, tartaric, malic and others. Self-ordered nanostructures formed this way can be used in the manufacture of various optical devices. Tubular aluminum oxides formed by local electrochemical anodization in organic acids have a high concentration of anionic complexes containing carbon atoms over 10 at.%. Studies of reflection spectra showed effective anti-reflection properties of films with a specular reflection coefficient of 0.7–1.4 %.
Helitron: Operation at High Frequency Orbital Harmonics and the Mode of Electron Phase Selection
Authors: Kurayev A. A. , Matveyenka V. V.
Published: January 2024

The possibilities of improving the output characteristics of the helitron in two directions have been studied – increasing the efficiency in the phase selection mode of electrons and increasing the operating frequency through the use of a multi-lamella electrodynamic system (increasing the azimuthal index n of the operating mode). The results obtained during the experiments indicate the unique capabilities of the helitron at very high harmonics of the electron orbital frequency: up to n = 96, the device has an acceptable efficiency for low-power generators in the electron phase selection mode. This opens up prospects for using such a generator in the millimeter wavelength range. However, in this range, instead of a high-frequency multi-lamella line, an azimuthally corrugated rod with a depth of longitudinal grooves ∆r = λ/4 should be used. This is most effective in providing thermal conditions.
CALIBRATION OF DISCRETE ELEMENT PARAMETER OF SOIL IN HIGH-SPEED TILLAGE
Authors: LI Shaochuan , DIAO Peisong , ZHAO Yongli , MIAO Hequan , LI Xianghao , ZHAO Hongda
Published: January 2024

For the problem of lacking reliable values of soil parameters required for dynamic simulation analysis of soil under high-speed tillage, no-tillage soil was taken as the research object and its parameters were calibrated using the discrete element method in this study. The Edinburgh Elasto-Plastic Adhesion (EEPA) model was determined as the soil contact model by obtaining the loading force-deformation relationship through uniaxial sealing compression tests. The regression equation was established using Plackett-Burman test and quadratic orthogonal rotation test, and the interaction effects were analyzed. The measured values of the pile angle and strain were obtained through the pile angle test and the uniaxial seal compression test, and the optimal solution was carried out. Further, the simulated values and the measured values under the optimal parameters were compared and verified, the result showed that the error values were all less than 1%. Finally, the soil model was used for high-speed tillage simulation analysis, and the obtained soil particle displacement and groove width were compared with the measured values. It was found that the ditch width error value was 3.04% and the soil displacement was basically the same. This study proved that the contact model parameters were relatively reliable, which could provide theoretical reference for the dynamic characteristics of soil during high-speed cultivation of no-tillage soil.
DESIGN AND EXPERIMENT OF AN END-EFFECTOR FOR HARVESTING SWEET PEPPER IN COMPLIANT OBSTACLE ENVIRONMENT
Authors: HUI Yunting , LIAO Yangyang , WANG Decheng , LI Xinxing , LU Zhiheng , YOU Yong , JIA Hanchu
Published: January 2024

Picking sweet peppers by hand is often time-consuming and laborious. To overcome this, in the current study, we developed an end effector for mechanized and non-destructive harvesting of sweet pepper. The design includes grip modules, shear modules and control systems. Based on the establishment of an approximate mathematical model of sweet pepper fruit and the analysis of the biomechanical characteristics of sweet pepper fruit, a pinch finger was proposed. The proposed mechanism is able to successfully achieve non-destructive and stable fixation of sweet pepper and fruit bunches. Key parameters of peduncles cutting were obtained by the cutting test. A cutting mechanism was then designed to achieve efficient separation of the fruit and fruit stem. The designed end effector achieves precise control through a single-chip microcomputer and multi-sensor integrated control system to achieve mature target fruits. The test results showed that the picking success rate, damage rate and picking time of peppers were 93.3%, 1.6% and 5 seconds, respectively. The end effector designed for sweet pepper picking has a simple and reliable structure, which provides a reference for further research on sweet pepper picking robots.
DESIGN AND MANUFACTURE OF A SUPERCRITICAL CO2 LIQUID EXTRACTION MACHINE FOR EXTRACTING BIOACTIVE COMPOUNDS
Authors: ARGO Bambang Dwi , SYECH Adam , RIJADI Avial Yosua , HERMANTO Mochamad Bagus , NUGROHO Wahyunanto Agung
Published: January 2024

Bioactive compounds in animal and plant cells have many benefits for human health, such as antioxidants, antibacterial, anti-inflammatory, and anticancer. Extraction and separation of bioactive compounds from other compounds is an important step, and commonly, conventional methods are used, but these methods have disadvantages, like producing unwanted compounds. Alternative methods can be conducted using supercritical fluid extraction, but this equipment is expensive and has a small capacity. So, this study aims to produce functional and structural designs and manufacture supercritical fluid extraction machines using carbon dioxide solvents (CO2) operating with a semi-continuous system. This research succeeded in designing and manufacturing a supercritical fluid extraction machine using carbon dioxide (CO2) solvent that operates in a semi-continuous system for the extraction of bioactive compounds, with main components including cover frames, supercritical extractor chamber, low and high-pressure CO2 tubes, compressors and boosters, pipelines, direct valves, manometers, heating, cooler, and expanders, result from reservoirs and automatic control. Moreover, the preliminary simulation test studies revealed that the supercritical extractor chamber could withstand an absolute pressure of 1000 bar, a temperature of 300°C, and a work capacity of 1 L. It indicated that the supercritical CO2 fluid extractor system was performing well for the conditioning of the extractor chamber, which is generated using a booster and controlled by a one-way valve. Then, the extract is transferred to the separation chamber to separate the CO2 gas. Then, CO2 gas is returned to the low-pressure CO2 tubes for recycling and reuse for the following process.
NUMERICAL SIMULATION AND TEST OF HOT AIR FAN
Authors: YOU Guoliang , LI Yaoming , WANG Hanhao
Published: January 2024

The value of high moisture content crops is higher and the planting area is wider. However, in the harvest process, due to the high moisture content, the cleaning loss is greater. In order to reduce the adhesion between the crop extraction mixture and improve the cleaning performance, a method of hot air cleaning was proposed. By using the fan design theory and thermodynamics, the prototype design of the hot air fan was completed. Through orthogonal test, the most suitable parameter combination is 1445r/min fan speed and 85℃ air inlet temperature. Computational fluid dynamics (CFD) was used to observe the air velocity and air temperature of the outlet under the optimal combination of parameters to check whether it meets the requirements of hot air cleaning. The reliability of numerical simulation was tested by bench test. Finally, a field experiment was carried out with the hot air fan to observe the difference between the cleaning effect and the fan under the optimal parameter combination, and compare the cleaning loss rate.
Textos bissextos sobre futebol
Authors: Hollanda Bernardo Borges Buarque de
Published: January 2024

No escopo do dossiê Futebóis e modernismos, a seção “Poética” procura apresentar textos literários menos conhecidos quando se pensam as relações entre letras e esportes no país. Trata-se de três publicações de autores brasileiros vinculados à história do modernismo, que, em diferentes temporalidades e por razões diversas, abordaram, ainda que de maneira incidental, aspectos da experiência esportivo-futebolística. Selecionamos para tanto um poema e duas crônicas, assinados, respectivamente, pelo escritor Cassiano Ricardo (1895-1974), pela pintora Tarsila do Amaral (1886-1973) e pela romancista Rachel de Queiroz (1910-2003).
Álbum de figurinhas
Authors: Silva Marcelino Rodrigues da
Published: January 2024

Uma breve apresentação das charges esportivas de Fernando Pieruccetti, artista importante na história do movimento modernista em Belo Horizonte e inventor dos famosos bichos simbólicos que representam os clubes do futebol mineiro.
várzea no reinado de Momo
Authors: Ribeiro Raphael Rajão
Published: January 2024

O presente artigo se propõe a examinar as aproximações entre os clubes de futebol de várzea e os festejos carnavalescos em Belo Horizonte entre os anos 1940 e 1980. Por meio de registros jornalísticos, relatos orais e acervos fotográficos, o texto busca compreender de que forma as agremiações amadoristas se envolveram com os folguedos momescos em suas diferentes vertentes. Compartilha-se a perspectiva de que as entidades esportivas populares do período estudado eram associações com ampla inserção comunitária, mantendo uma rica atividade social e cultural. Nessa medida, a identificação da estreita relação entre futebol e carnaval na vida de bairro permite compreender um dos caminhos para a conexão entre essas duas expressões que, ainda hoje, influenciam-se mutuamente.
som dos ambientes
Authors: Palmieri Julio Cesar
Published: January 2024

O presente artigo trata de considerar alguns aspectos que comumente não são vistos quando se pensa e se analisa o futebol do ponto de vista da antropologia. No caso, a pesquisa debruçou-se sobre o cenário das categorias de base (notadamente as categorias sub-15, sub-17 e sub-20) e aqui apresento parte de algumas influências que foram encontrados a partir da etnografia. O aprendizado que se relaciona ao jogar futebol muitas vezes escapa às metrificações, medições, esquadrinhamentos e racionalizações que seus envolvidos preconizam. Falo, pontualmente, do som, ou dos sons produzidos no ambiente do futebol de base e como este é utilizado como ferramenta para compreensão de um universo particular, um processo de entendimento e concepção que se mostra mais sensível e subjetivo do que normalmente se imagina.
Indywidualizacja jako wzór kulturowy, proces i ideologia
Authors: Szymańska Ilona
Published: January 2024

The subject of this article is the concept of individualisation, widely present in sociological literature as a common diagnosis of contemporary status quo. This view is analysed here not only in terms of society’s disintegration (decay?) and the inevitable opposition between the  society  and  the individual,  but  also  multiplication of  possible schemes of acting. Basing on Jean-Claude Kaufmann’s notion of dialectical square, the author considers the individual and the society as ideal types, drawing attention to inextricably related changes of both the individual and the society. The analysis of woman’s magazines helps to establish how the new patterns of ordering experience are created and how they influence the performance of social roles and mutual relations. This field of research seems attractive since both the context of transformation and the situation of women most vividly demonstrate tensions between the modern and post-modern patterns of behavior and reveal paradoxes of the process of individualisation. By making the individual the focal point of attention it makes the increasingly complex relations with other individuals its primary concern.
Problemy relacji homoseksualnych i ich źródła na podstawie analizy treści poradników dla osób homoseksualnych
Authors: Zieleńska Marianna , Nowotny Agata
Published: January 2024

The article provides the analysis of three handbooks for homosexuals (two for gays and one for lesbians). Its first part summarizes their contents which demonstrate that homosexual relations do not belong into one class of phenomena. The problems of homosexual women and men are distinctive enough to preclude their treatment either as one group or in opposition to heterosexual relations. The factor which distinguishes them is not sexual orientation but gender — its social construct. The second part of the article concerns the interpretation of homosexual relations in accordance with Pierre Bourdieu’s theory of male domination. It is a principle which shapes social order. However, it is more than just a hegemony of men over women. It’s victims are representatives of both sexes. Social models of masculinity and femininity are translated through the process of socialization and impact on both homosexual and heterosexual people. These models are the most intricate problem in the sphere of intimate relationships among gays and lesbians.
Społeczne wyobrażenia prywatności
Authors: Dopierała Renata
Published: January 2024

In the paper author considers social representations of privacy based on empirical research — The Unfinished Sentences Test. The main goals of the text are to begin defining such terms as: private life and private sphere, and to discuss functions of privacy, how it is experienced and its role in individual and social life. It also deals with the threats to privacy in contemporary societies.
Emocje, kultury, teksty. Perspektywy antropologiczne
Authors: Kuligowski Waldemar
Published: January 2024

The two most significant turning points of the last decades in cultural anthropology were tied to the reflexive tide and the influence of feminist theories. Drawing on these, the author is considering various approaches to the sphere of human emotions. The common assumption is to treat emotions as part of culture — not an element of animal nature (Darwin) or subconscious determinism (Freud). The agreement with the assumption of understanding culture as source and tool of expressing emotions does not imply unanimity regarding the way of writing about it. Reflexive and feminist anthropologists suggest own strategies concerning both writing articles and field research.
Nefemerydy w morzu sieciowym. Ucieczka emocji z klatki postprywatności
Authors: Szlendak Tomasz
Published: January 2024

Industrial society and powers which controlled that society are no more. Instead, there is a Seanet and an Empire, a new form of web power, which strives to control it by producing symbols, needs and identities. Through its agency — a rapidly weakening state — the Empire pushes the Seanet into the cage of post-privacy. In the post-private society the distinction between the private and public disappears which leads to the subordination of emotions to a new refined digital form of control. It is possible to escape from the overwhelming post-private control — through the nephemerides (new noninstitutional forms of net social life), desertion, and positive trolling. The text should be placed in the theoretical model that — out of lack of alternatives — might be called evolutionary net neomarxism. The article offers a reconstruction of the problem of love as a subject in sociology and the typology of contemporary approaches to it. The first part discusses the following themes: representation of love in classical sociology based on the works of Max Weber; its gradual exclusion from the list of legitimate sociological subjects and the reasons for its return into that sphere. The second part presents the typology of contemporary sociological understandings of love and reconstructs sociobiological theories and conceptions of Pierre Bourdieu, Niklas Luhmann and Zygmunt Bauman.
Pięćdziesiąt lat „Kultury i Społeczeństwa”: elementy ciągłości i zmiany
Authors: Tarkowska Elżbieta
Published: January 2024

The current editor-in-chief of “Kultura i Społeczeństwo” [Culture and Society], Elżbieta Tarkowska, presents in her text the fifty-year-old history of the quarterly. She distinguishes five periods: 1957–1959 — “bold beginning”, 1960–1968 — “research of modernity and integration of humanities”, 1969–1979 — “after the first twelve years”, 1980–1982 — “time of continuity”, 1983–2001 — “regular scholarly journal”, 2002–2006 — “continuation and change”. These periods are marked, first and foremost, by changes on the position of the editor-in-chief. Moreover, the author characterizes the specificity of the journal which comprises of: consistently emphasized interdisciplinary character of the journal, a clearly defined thematic focus i.e. concentration on a broadly defined culture and its changing character, concern for preservation and reinforcement of the social sciences tradition in Poland, and also the elements of continuation within the quarterly itself, despite various shifts conditioned by external circumstances.
Uwagi o aktualności koncepcji teoretycznych Stanisława Ossowskiego
Authors: Chałubiński Mirosław
Published: January 2024

The article analyzes the issue of relevance of Stanisław Ossowski’s theoretical concepts. It particularly focuses on three themes present in his writings: the attitude to Marx’s legacy, the assumptions of his non-communist socialism and relations of sociology to philosophy. It is stressed that the contemporary relevance of Stanisław Ossowski’s writings relies not only on the theoretical value of his work in many disciplines, but — above all — their interdisciplinary character. Needless to say, Ossowski still remains a moral authority for many academics specializing in humanities.
Modelowanie ciała jako wartość we współczesnej polskiej kulturze popularnej: porównanie osiedlowej siłowni i komercyjnego klubu fitnessu
Authors: Biały Kamila
Published: January 2024

The article is a report on the field research carried out in a local gym in a large city and in a commercial fitness club. A detailed description of these places, the people who frequent them and the relationships between them was used in the analysis of two types of social dependence — communal ties and ties of association. The concepts of community and society are deeply rooted in sociological tradition.That description can also be treated as a source of knowledge of the trends in the transformation of cultural patterns appearing in the popular culture of contemporary Polish society.
Anorektyczna realizacja archetypów negatywnej kobiecości
Authors: Starzomska Małgorzata
Published: January 2024

Contemporary culture not only glorifies slimness among women, but also makes considerable demands of them. They are expected to perform contradictory duties ideally. They should be beautiful, slender and hard-working. They should be perfect mothers and foresighted wives. At the same time they should not be assertive or too intelligent. The article presents an approach according to which anorexia is the answer of an adolescent woman to the archetypes of negative womanhood which have existed for ages. This illness may be considered to be a highly symbolic reaction to these archetypes and, furthermore, their paradoxical fulfillment. For anorexic women the auto-destruction of their body is tantamount to the triumph of their mentality.
Analysis of curing conditions effect on refractory calcium aluminate phosphate cement and concrete hydration (review)
Authors: Nagorniy A. O. , Nagorniy M. A.
Published: January 2024

A literature review and analysis of the effect of curing conditions on refractory calcium aluminate phosphate cement and concrete (CAPC) hydration were conducted. It was shown that temperature, as well as H2O requirement, are the most important variables requiring control during the installation of refractory­concrete linings because it influences the sensitivity of these materials to all processing steps including mixing, placement, curing, and heatup. The above requirements have a sequential effect on the service life and performance of a refractory­concrete lining bonded with CAPC; that is, the strength degradation resulting from structural defects caused by improper placement will be amplified by the use of poor curing practices and of nonuniform and excessively rapid heating. The processing variables that must be controlled during installation and initial heatup of CAPC­bonded concretes are H2O requirement; placement method; curing time, temperature, humidity; and heating rate and schedule. It was shown how the resultant hydrated CAP phases contribute to developing hydraulic bonds at ambient temperatures. It emphasizes the correct use of curing, drying, and firing procedures to avoid structural defects relating to the transition of hydrated phases and gels. Permeable crystalline phases are then developed that maximize structural stability and ensure safe heating of monolithic linings. The concretes obtained retain their volume integrity when subjected to prolonged periods of cyclic heating and cooling; can be used for refractory applications at 1700 °C exhibit sufficient strength of lining 40 MPa.
Analysis of solid­phase reactions in the subsolidus of the CoO—Fe2O3—Al2O3 system
Authors: Tsapko N. S. , Shabanova H. M. , Logvinkov S. M. , Korogodska A. M.
Published: January 2024

The article is devoted to studying the ternary system CoO—Fe2O3—Al2O3 structure with the determination of the thermodynamic equilibrium compositions of phases in its subsolidus. For theoretical studies in the CoO—Fe2O3—Al2O3 system, initial thermodynamic constants were calculated for CoAl2O4 and Fe2Al2O6. Subsequently, the entire possible array of exchange­type solid­phase reactions was simulated with the participation of stoichiometric compounds of the system. The possibility of destabilization of combinations of CoAl2O4 and CoFe2O4 phases in comparison with three­phase combinations was verified, namely, the article considered reactions not of the “2 = 2” type, but of the “2 = 3” type (two starting compounds and three compounds in the interaction products, or vice versa). It is noted that all possible variants of reactions of the “2 = 3” type in the CoO—Fe2O3—Al2O3 system can be modeled as linear combinations of exchange­type reactions with the participation of stoichiometric compounds of the system. The calculation of DG = f(T) values for them is reduced to a simple algebraic summation of the corresponding values of DG for the reactions that make up the combination of system phases. The calculations analysis of the change in Gibbs free energy with temperature in the range from 800 to 2000 K for the analyzed solid­phase reactions made it possible to carry out a complete triangulation of the CoO—Fe2O3—Al2O3 system with its division into elementary triangles. The geometrical and topological characteristics of the CoO—Fe2O3—Al2O3 system and its phases are determined. Information about phase relationships and thermodynamic stability of phase combinations can be useful in developing special­purpose refractory non­metallic materials. The use of compounds included in the elementary triangle CoO—CoFe2O4—CoAl2O4, which according to its geometric and topological characteristics has the maximum area, in the production of special materials with specified properties is proposed.
Thermal insulation refractory materials and products (review)
Authors: Balaev А. D. , Pitak Ya. M.
Published: January 2024

A literature review of manufacturing technologies, properties, and applications of thermal insulation refractory materials and products was carried out. It was shown that thermal insulation refractory materials are relevant for modern industry and science, as they contribute to solving many problems related to improving the efficiency, safety, and ecology of various technological processes. They are a promising object of research and development, as they are constantly being adapted to different operating conditions. Various methods of porosization (swelling (foaming); evaporation or burning of the pore­forming agent; loose packing; contact monolithization; bulk monolithization; and creation of combined structures) were shown to produce lightweight insulating refractories. A separate part of the review was devoted to fiber refractory materials and products as the most modern and relevant materials. The technologies for obtaining both refractory glass fibers and polycrystalline fibers, their properties, and applications were described. Based on the literature review on the classification, manufacturing technologies, and applications of thermal insulation refractory materials and products, the main directions of further research in the field of refractory fiber thermal insulation were identified.
Technological aspects of the production of rocket fairings using radio­transparent ceramics of celsian­willemite composition
Authors: Fedorenko О. Yu. , Lisachuk G. V. , Bilohubkina K. V. , Krivobok A. V.
Published: January 2024

The article presents the results of the development of recipes and technological parameters for producing rocket nose cones for high­speed, highly maneuverable aircraft. Considering that most of the radiotransparent ceramic materials existing today are monophase, the authors substantiate the need to use polyphase ceramics, including compounds with low thermal expansion, provided that their dielectric properties meet the requirements for radiotransparent materials (e = 1 ÷ 10, tgd ≤ 10–2). The developed compositions of celsian­willemite ceramics ensure the synthesis of target phases (Zn2SiO4 and BaAl2Si4O8) and the maximum degree of sintering at a temperature of 1200 °C which is 150 °C lower than known analogs. The use of Li2O additive in an amount of 2 wt. % (over 100 %) allows for the formation intensification of target phases and eliminates residual intermediate phases. A technology has been developed for the manufacture of thin­walled products of complex shapes using the slip­casting method. To regulate the properties of non­plastic slips, an additive is recommended that has a complex effect, manifested in increasing the fluidity of the slip, improving its filtration properties, and increasing the castings’ strength. The additive is introduced at the slip preparation stage and contains the diluting component (0.38 % Dolapix PC67) and the adhesive component (0.7 % PVA 1788) at a dosage over 100 % on a dry matter basis. A rational technological scheme and parameters for the manufacture of rocket nose cones from celsian­willemite ceramics have been developed. Products made from celsian­willemite ceramics are characterized by excellent dielectric (e = 2/41 ÷ 2.85; tgd = (0.2 ÷ 2.4)10–2) at a frequency of 1 MHz), physical and mechanical (scomp = 831 MPa, sbend = 207 MPa) and thermophysical (Dt = (225 ÷ 250) °С) properties, which ensure their operational reliability and efficient long­term operation.
Technological prospects of domestic alkaline metasomatites using in the production of technical porcelain stoneware
Authors: Fedorenko O. Yu. , Pitak Ya. M. , Kartyshev S. V. , Hrebeniuk A. A.
Published: January 2024

Achieving the highest degree of sintering of porcelain stoneware (W < 0.5%) is the main condition of obtaining high­quality products with high resistance to the simultaneous action of mechanical and abrasive loads, aggressive reagents and sign­changing temperature fluctuations. The main impact in this case is dependent upon quartz­feldspathic natural material. Unfortunately, domestic Ukraine’s deposits of feldspathes are almost exhausted, while the impact of alternative fluxes is not researched on the level of technological practice. For the stable functioning of domestic industry in the market economy it is crucial to expand raw materials base and solve energy­saving problems. To solve the mentioned issues, it is required to find alternative fluxing materials, which should ensure the highest degree of sintering, and therefore complex high operational product properties, in conditions of energy­saving quick sintering of technical porcelain stoneware.

This study justifies the forecast estimate methodology of quartz­feldspathic materials’ usage efficiency taking into the account products’ sintering conditions. A set of theoretical and experimental studies was carried out, the results of which helped to determine the usage expediency of a range of domestic alkaline metasomatites in the production of technical porcelain stoneware tiles. The used approach to predicting the behavior of alternative raw materials made it possible to obtain data on their technological properties, in particular the characteristics of the melts formed under conditions of high­speed products firing at a temperature of 1200 °C: η = 102.05 ÷ 3.07 Pa·s, s = 0.304 ÷ 314 mN/m. The results of theoretical and experimental studies of the chemical­mineral composition and properties of six different occurrences of alkaline metasomatic rocks indicate the advisability of their use as an alternative to albite concentrates imported from Turkey. Obtained new data allowed to outline the transition ways from costly feldspathic concentrates to domestic substitutes, thus allowing to eliminate of import dependence of domestic producers of porcelain stoneware tiles and large format slabs.
Activities of JSC “The Ukrainian research institute of refractories named after A. S. Berezhnoy” in the field of refractories standardization in 2021—2022
Authors: Martynenko V. V. , Belyaeva L. V. , Pahomova T. F.
Published: January 2024

In 2021, JSC “URIR named after A. S. Berezhnoy” institute carried out scientific, scientific­technical, and organizational activities in the field of development, verification of national standards for refractories harmonized with ISO standards, provided scientific, methodological, information, and consulting services to provide regulatory documentation at the request of refractory enterprises of Ukraine.

The Institute organized and coordinated the activities of the Technical Committee for Standardization “Refractories” (TC 7), prepared work plans and reports on the work performed by the TC 7 in 2021, and submitted them to the National Standardization Body — SE “UkrNDNC”.

In 2021, JSC “URIR named after A. S. Berezhnoy” institute developed five technical specifications (TSs) for serial refractory products manufactured by refractory enterprises of Ukraine. Six technical specifications and eight changes to the current TSs for pilot batches of refractory products manufactured by the Institute were developed.

The technical specifications and changes to the technical specifications were developed in accordance with the requirements of the modern standardization system of Ukraine, agreed upon with the enterprises — producers, as well as consumers, and checked for compliance with current legislation, technical regulations, as well as normative documents, and entered into the database “Technical Specifications of Ukraine” — SE “Kharkivstandartmetrologiya”, approved by the Technical Committee for Standardization “Refractories”.
APLIKASI SISTEM INFORMASI PERSONALIA CV. MADYA MANDIRI TEKNIK BERBASIS WEB DENGAN METODE RAPID APPLICATION DEVELOPMENT (RAD)
Authors: Alfiansyah  , Nurcahyo Widyat , Faizah NM
Published: January 2024

Various technologies can be felt related to progress and innovation in information processing. The emergence of problems is the background for innovations in the field of technology. Information systems are a solution to help with daily work. Utilization of information systems can make work more detailed and as a place to store and process data. The application of Rapid Application Development is able to complete the creation of a data information system in a short time. The developed information system is used to assist the company's business processes in assisting data processing. In the current research, the authors develop a data information system whose purpose is to manage data in the company CV Madya Mandiri Teknik. The author created a web-based personnel information system application to help companies access data, which previously still used Microsoft Excel to record data, this was very ineffective for staffing staff in terms of efficiency in terms of costs. By designing a web-based data collection application that will make it easier for staffing staff to find out the number and status, it is hoped that it can help staffing staff to get valid data and with a variety of interesting features making it easier for administrative staff to complete their tasks effectively.
Perancangan Sistem Informasi Peminjaman Berkas Rekam Medis di RSUD Al-Ihsan
Authors: Aurellia Aura , Nursari Deasy Laela , Syahidin Yuda , Yunengsih Yuyun
Published: January 2024

This study aimed to evaluate current systems and processes as well as design and build a medical record lending information system using Visual Studio 2012 at Al-Ihsan Regional Hospital in Bandung. The research method used is qualitative research with data collection through observation, interviews, internet browsing and information system design within a system development framework built using the waterfall method using the Microsoft Visual Studio 2012 tool. In this study, several problems were found in the medical record borrowing process, among others, inefficiencies in the document borrowing system, the use of using Excel-based manuals, as well as obstacles in obtaining documents. It is suggested that a system designed to record loans be used to speed up the process and manage duplicate data more effectively.
Perancangan Sistem Informasi Penjualan Obat Pembersih Kerak Lantai Berbasis Web pada PT Duta Jaya Fritztama
Authors: Pratiwi Amellia Julianty , Sukarno Hasbi Basith , Kusumadiarti Rini Suwartika
Published: January 2024

This research aims to analyze, design and build sales information systems at PT. Duta Jaya Fritztama. The design of this sales information system was developed using the PHP programming language using MySQL as the database. The method used is descriptive qualitative method and the system development used is the Waterfall method and the data collection techniques used are interviews, observation and literature study. The problems that occurred at PT. Duta Jaya Fritztama is in a sales system that has been computerized but is not optimal so that the system is less efficient and takes a long time to record sales. The effort to solve this problem is to create a web-based sales information system to make it easier for users in the process of recording sales, improve service, comfort and make company performance more effective and efficient.
Perancangan Sistem Informasi Penggajian Karyawan Berbasis Web dengan Menggunakan PHP dan MySQL pada CV. Sukses Sejahtera
Authors: Sugiarti Jeni , Sukarno Hasbi Basith , Kusumadiarti Rini Suwartika
Published: January 2024

The research aimed to know the system that is running, analyze design and build the accounting information system employee payroll at CV. Sukses Sejahtera. The research method used descriptive qualitative and data collection techniques used are observation, interviews, and literature reviews. System development method used is waterfall method. This accounting information system design used PHP and connect with MYSQL as database. The problem before making this system was data employee payroll still recorded manual in Microsoft Office Excel so this system not efficient, too much time to be wasted on recording or processing. The solution needed is to design a new payroll information system to make it easier to process data and generate reports quickly, precisely, and accurately.
Implementasi Sistem Keuangan Desa (SISKEUDES) dalam Meningkatkan Efektivitas Pengelolaan Keuangan Desa di Desa Telukbuyung Kabupaten Karawang
Authors: Amelda  , Sihabudin  , Fauzi Robby
Published: January 2024

Teluk Buyung Village, Karawang Regency has implemented the SISKEUDES application since 2017 as a government effort to increase the effectiveness of village financial management. SISKEUDES is a technology-based application that is integrated and can make it easier for the village government to present accountable and transparent financial reports, in practice there are still obstacles experienced by the village government. This type of research is a qualitative descriptive research. The research was conducted on May 5, 2023. Researchers conducted research for 2 months, namely May-July 2023. The subjects for this study were the Village Head, Head of Finance for Telukbuyung Village, Pakisjaya District, Karawang Regency and BPKP West Java. This research uses two sources of data, namely primary data and secondary data. The central government's efforts to increase the effectiveness of financial management in Teluk Buyung Karawang Village experienced several obstacles, especially in the lack of understanding, resources in implementing SISKEUDES. and the recording stage which was not carried out in real time Overall, the research shows that the implementation of SIKEUDES in Telukbuyung Village has several aspects that have been implemented successfully, such as good communication, transparency, and the principle of orderly budgeting. Even though there have been positive steps, there are still obstacles that need to be overcome to increase effectiveness and efficiency, there are challenges in application operation, optimal accountability, and full participation of all related parties.
Analisis Fenomena Pencarian Jodoh Melalui Aplikasi Kencan Tinder Dalam Keterbukaan Diri Pengguna di Kota Samarinda
Authors: Aulia Hirpa , Agustian Jaka Farih
Published: January 2024

The emergence of the Tinder dating application as a form of technological progress is utilized by many people to meet the needs of human life in finding a life partner. Tinder appears to make it easier for individuals to get acquainted with new people they meet on the internet. The process of communication and interaction changes. In starting a relationship, self-disclosure is the first step in achieving a deep relationship. In this case, the process of self-disclosure is a process of disclosing personal information. Personality disclosure affects the intimacy of a relationship. The purpose of this research is to find out the phenomenon of finding a mate through the Tinder application in the self-disclosure of users in Samarinda city. This research uses a qualitative method with a phenomenological approach and uses Social Penetration theory. The techniques used in collecting data are observation, interviews and documentation of 5 Tinder application users in Samarinda City. Informant collection using purposive sampling technique. Based on the results of the study, the stages of informant self-disclosure in finding a mate through the application are at different stages. Not all informants are at the effective stage, where informants avoid conflict rather than resolve conflicts that occur so that the relationship runs aground before commitment. In the orientation process, selection is made through the user profile in the application, then the process of self-disclosure is carried out outside the application