bluuebunny/crossref_metadata_2025 huggingface dataset:
DILEMA ETNIS TIONGHOA DI INDONESIA
Authors: Shanti Desril Riva , Rusyanti Rusyanti
Published: October 2021

Etnis Tionghoa telah menjadi bagian dari masyarakat Indonesia dengan berbagai dinamikanya. Perubahan kebijakan yang terjadi pada beberapa kekuasaan yang  lampau telah berdampak pada perubahan sikap masyarakat keturunan etnis Cina  yang mengalami dilemma baik dalam konteks sosial, ekonomi, maupun religi dibandingkan dengan golongan masyarakat Indonesia lainnya.  Bagaimana mereka mampu menghadapi berbagai situasi tersebut merupakan kasus yang menarik untuk diobeservasi. Melalu studi pustaka dan pendekatan strategi kebudayaan Van Peursen, diketahui middle man menjadi strategi yang dipilih dalam menghadapi serba ketidakpastian di masa lampau. Strategi tersebut hingga kini masih menjadi tantangan mengingat hubungan sejarah masyarakat keturunan Cina di Indonesia masih meninggalkan riak-riak dan stigma yang berkepanjangan.
STRATEGI ADAPTASI DARI KEBENCANAAN STUDI KASUS STRUKTUR DAN LINGKUNGAN SITUS GUNUNG PADANG
Authors: Yondri Lutfi
Published: October 2021

Punden Berundak Gunung Padang sampai sekarang dapat dicatat sebagai salah satu struktur yang di bangun oleh masyarakat prasejarah untuk kepentingan pengagungan arwah leluhur di satu tinggian yang kemudian disebut sebagai Gunung Padang. Salah satu aspek yang belum banyak dibahas hingga kini adalah bagaimana kerawanan struktur dan lingkungannya yang sejak dulu berada di jalur sesar akif Cimandiri dan Cikondang, serta berada di lokasi yang rawan longsor. Tulisan ini bertujuan mengeksplorasi tentang potensi dan rekam jejak ancaman kerusakan yang terjadi pada masa lalu hingga kini, dan bagaimana masyarakat pendiri struktur punden berundak Gunung Padang dalam mengantisipasinya pada masa lalu Untuk membahas hal tersebut dicoba amati pola susun batuan pembentuk struktur punden dan pengamatan berbagai elemen yang merupakan bentukan baru di sekitar lereng yang kemudain dikaitkan dengan catatan kebencanaan yang diperoleh dari sumber literatut. Dari hail kajian dapat disimpulkan bahwa masyarakat yang membangun punden berundak tersebut telah arif dan pandai menyusun balok-balok batu pembentuk struktur tersebut yang antisipatif terhadap keadaan lingkungannya pada masa lalu.
MITIGASI KEBENCANAAN PADA SITUS MASJID RAYA SULTAN RIAU DALAM PELESTARIANNYA
Authors: Theodorus Theodorus
Published: October 2021

Bencana alam dapat mengancam tinggalan arkeologis di Indonesia seperti Masjid Raya Sultan Riau di Pulau Penyengat, Kota Tanjungpinang, Provinsi Kepulauan Riau. Pulau ini dijadikan salah satu destinasi pariwisata dengan konsep wisata religi, namun saat ini belum ada mitigasi bencana yang maksimal untuk menjaga keselamatan bangunan cagar budaya Masjid Raya Sultan Riau. Metode penelitian menggunakan pendekatan deskriptif kualitatif melalui literatur dan jurnal yang ada serta teknik pengumpulan data observasi lapangan Masjid Raya Sultan Riau. Teknik analisis data yang digunakan, yaitu analisis kualitatif dan analisis SWOT. Analisis SWOT menghasilkan beberapa poin penting sebagai upaya mitigasi, yaitu membangun bangunan atau struktur pengamanan di sekitar Pulau Penyengat seperti membangun bangunan penahan ombak, penyediaan pemadam api, serta zonasi. Zonasi pada cagar budaya Masjid Raya Sultan Riau masih tergabung dengan cagar budaya lainnya di Pulau Penyengat sehingga Masjid Raya Sultan Riau perlu melakukan pengembangan mitigasi bencana terutama untuk pelestarian warisan budaya, lingkungan, dan industri pariwisata
MULTI MEDIA UNTUK MENUNJANG EDUKASI UPAYA PENGURANGAN RESIKO BENCANA DI KAWASAN GEOPARK CILETUH
Authors: Natarina Diah , Sachari Agus
Published: October 2021

Pemasukan Negara dari Sektor Pariwisata menjadi sumber pemasukan andalan. Peristiwa geologis dasar samudra yang terangkat kepermukaan laut menjadi Nusantara adalah hasil proses evolusi berjuta-juta tahun lalu. Saat ini, di satu sisi bumi sudah mencapai titik kematangannya. Akan tetapi, di sisi lain makhluk hidup dan peradabannya terus berkembang. Pada awalnya manusia sangat memuliakan alam namun peradaban dan perkembangan ilmu pengetahuan kemudian mengubah  manusia dan tata alam sehingga bencana alam sering terjadi. Ciletuh di selatan Sukabumi, Jawa Barat sebagai alternatif tujuan geowisata kawasan konservasi UNESCO Global Geopark telah mengalami penyesuaian tata alam karena pembangunan akses tranportasi roda empat. Kawasan ini menghadapi potensi masalah longsor. Tujuan dari penelitian ini adalah upaya mengurangi resiko terjadinya longsor melalui satu sistem informasi kawasan. Dalam mencapai tujuan, metodologi kualitatif yang digunakan adalah deskriptif analitis. Teknik pengumpulan data dengan melakukan tinjauan literatur, observasi dan wawancara mendalam. Hasil penelitian menunjukan bahwa sistem informasi berupa rambu-rambu agar berhati-hati saat melintas perlu dilengkapi dengan aplikasi multimedia. Melalui pendekatan desain komunikasi visual, info grafis sebagai materi edukasi penanggulangan bencana menjadi lebih mudah dimengerti bagi masyarakat. Kawasan Ciletuh yang sudah menjadi kawasan UNESCO Global Geopark Network harus memiliki regulasi lengkap sebagai acuan dalam pengelolaan kawasan geowisata tangguh bencana.
KEARIFAN LOKAL PELESTARIAN KAWASAN SEKITAR SITU CISANTI: SUATU KAJIAN UNTUK PENGEMBANGAN BAHAN AJAR
Authors: Diana Dian
Published: October 2021

Kawasan sekitar Situ Cisanti berada pada arboretum 73, tepat di Hulu Sungai Citarum. Ada tujuh buah mata air yang mengalirkan airnya ke Situ Cisanti. Terjadi pengeringan mata air, saat kawasan sekitar diubah secara destruktif. Terganggunya ketersediaan air ini, tentu merupakan suatu bencana.yang harus segera diatasi. Metode dalam penelitian ini menggunakan kualitatif-verifikatif dengan pendekatan fenomenologi. Walaupun aktivitas destruktif pada hutan di kawasan sekitar situ kerap terjadi, ternyata masih ada kearifan lokal  yang digunakan oleh masyarakat. Zonasi kawasan sekitar situ terbagi menjadi enam petak dengan 3 fungsi berbeda. Penelitian ini, akan menjadi inspirasi bagi peserta didik untuk paham, sadar, peduli, dan melakukan aksi pelestarian lingkungan. Bahan ajar dari hasil penelitian ini, disesuaikan dengan materi ajar tentang pelestarian lingkungan pada pembelajaran IPS.
Some Properties of High Strength Sustainable Concrete Containing Glass Powder Waste
Authors: I. Khalil Wasan , Nazar F. Al-Obeidy
Published: October 2021

This investigation includes the use of glass wastes after recycling to produce high strength sustainable concrete. The glass waste used is prepared to be a natural Pozzolan class (N) according to ASTM C618 with fineness of about 7340 cm2/gm. Many concrete mixes with different percentages of glass waste powder as a partial replacement by weight of cement (10%, 15%, 20%, 25%, and 30%) were prepared to study some properties of concrete (compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity at 60 day age). The test results indicate that the mechanical properties of concrete are improved with the increase of glass waste powder up to 15%, and then decreased. The maximum percentages of increase for compressive, splitting tensile, flexural strengths, and modulus of elasticity are 13.29%, 36.27%, 34.68%, and 8.2% respectively relative to the reference for concrete specimens containing 15% glass waste powder as a replacement by weight of cement.Corrosion inhibition of low carbon steel, stainless steel types 316 and 304 in hydrochloric acid by potassium iodide was investigated at different temperatures using weight loss and polarization electrochemical techniques
A New Technology for Reducing Power Consumption in Synchronous Digital Design Using Tri-State Buffer
Authors: Shakor Moghee Hussein
Published: October 2021

This research paper deals with design and implementation of low power 8-bit arithmetic logic units. The main part of power consumption is consumed in ALU in any processor. Therefore, reducing power dissipation in ALU should be requiring. The proposed technique disabled one of the main block of ALU using tri-state logic which is not necessary to use, except the required processes. In this work, the suggested design is realized by using ASIC methodologies. In order to implement the arithmetic and logic architectures, 130 nm standard cell libraries are used for ASIC execution. The architecture of the design has been created using Verilog HDL language. In addition, it is simulated using ModelSim-Altera 10.3c (Quartus II 14.1) tools. By using tri-state technique, dynamic power and total power are decreased
Removal of Cadmium Ions from Aqueous Solutions Using Flax Seeds as an Adsorbent
Authors: Adil Jasim Nidaa , Tamara Kawther Hussein
Published: October 2021

Removal of Cd(II) from  aqueous solution through adsorption using flax seeds was studied. Adsorption parameters such as pH, adsorbent particle size, adsorbent dosages, and initial concentrations of metal ions were studied. All experiments were conducted at room temperature. Langmuir and Freundlich adsorption isotherm models were applied to describe the quantitative uptake of Cd(II) ions by adsorbent. The results show that the maximum adsorption removal reach to 77 %   for Cd (II) onto flax seeds, at optimum operating conditions: pH of 5, particle size of 75µm, adsorbent dosage of 2 g/100 ml and metal concentration of  5 mg/L . The equilibrium adsorption data for Cd(II) were better fitted to  Freundlich adsorption isotherm model than Langmuir. The study concludes that the use of flax seeds as an economic and locally adsorbent for removing Cd(II) from polluted solution is effective. Thus offering a low cost material show potential use it to remove heavy metals.
Effect of Text in Contemporary Architectural Formation (Kinetic Architecture as a Case Study)
Authors: Kadhim Al-Yousif Ibrahim Jawad , Shaimaa M. Hamza Al-Hayabi
Published: October 2021

Architecture is a language, and this means that we understand each phrase in a language or text in it, which is built in our architecture. Texts have richness and complexity, and the openness of the architectural text ahead of the act of interpretation, lead to social interaction.

Where the text reads in terms of reference, structure, and philosophical vision, and its variables, and comparing it with kinetic architecture as a product of the relationship between human behavior and kinetic waves which have considered a real revolution in architectural thought, where has changed the path of the architecture, where it changed the path of the architecture that has seen from the perspective of persistence and physical and formal stability on the ground to the perspective of movement, dynamism and the formal and positional changes of the building. The role of the process (time) has a significant impact on the kinetic architecture through which the movement can be, and it is an essential element of the movement's principles and conditions in its contemporary architectural formations.

So the research aims to statement of the relationship of the text of the concepts of the text to the concepts of the system of human actions in being and its content becoming and process, against the system of architectural acts in the components of the text (reference structure, and philosophical vision), and reflect this relationship on kinetic architecture as a contemporary architectural formation to know its relationship with the text and its components
Effect of Dispersion Method for Nano-Materials on Some Mechanical Properties of Cement Mortar
Authors: J. Kadhim Mohammed , Hamza M. Kamal
Published: October 2021

This study was involving the dispersion method of nano-materials replacement and the interaction with cement mortar behavior for many mortar samples under variable curing time ,with constant water to cement ratio (W/C=0.45) .Some mechanical properties such as (compressive, flexural strength and hardness tests) was studied. The main parameters are depending on the small amount replacement ratio of nano-particle (ZrO2) with respect to the mass of the cement (OPC) type (I). The addition of nano-material by replacement on the mixture of mortar includes (1, 2, 3,4and 5%) with constant W/C ratio and also the amount of the fine aggregate use is 2.75 from the amount of cement. The results show that, the strength of the mortar  that consist from colloidal nano materials give better properties than from both mortar with dry nano-materials replacement and without nano-materials in all test, But the nano-Zirconia materials give good properties up to 2% in all  tests compared with control cement mortar.
Effect of Steel Tube Thickness on Flexural Behavior of Concrete Composite Beams Using Different Section Shapes
Authors: M. Bahlol Fahad , Amer M. Ibrahim  , Wissam D. Salman  , Humam A. Abdulhusain
Published: October 2021

The current paper aims to investigate the effect of steel tube thickness on the structural behavior of concrete composite beams with different steel tube sections. The experimental work of this study included a series of bending tests. The loading type used to study this effect on bending behavior of steel tubes was simply supported beam tested by two points load. Six composite beam specimens were performed and tested up to failure using three shapes of steel section (hexagonal, square and rectangular), every two specimens have the same shape of steel section. The type of shear connector was the headed stud for all specimens and to investigate the effect of thickness, this study used two thicknesses of steel tube sections of (2) mm and (3) mm. The tests showed improvement in the flexural behavior by increasing thickness of different steel section shapes, (50%) increasing in steel tube thickness led to increase the ultimate load by (32% - 34%). The ultimate slip at the ultimate load, for each specimen, is decreased by increasing the thickness of steel tube, the range of decreasing is ( 3.55% - 30.16% ).
Mechanical Properties Evaluation of Cold-Curing Acrylic Resin Reinforced by Banana Peels’ Fibers.
Authors: R. Gharkan Mohammed , Ahmed H. Ali  , Hossam E. Salman  , Bassam I. Khalil
Published: October 2021

Although low mechanical properties of Acrylic resin, it is the most popular used substance as based denture materials. This drawback could be treated through adding reinforcing phase. In this work washing and non-washing banana peels as kind of natural fibers with different weight fractions, (5, 10, 15 and 20) % wt. and standared Acrylic, for compartion purpose, are used to prepare composite specimens by modeling method on order to study possibility of reinforcing cold-curing acrylic resin by banana peels. Peels had been dried, crashed, and washed by distillation water before using in the work. Unwashed peels also used for comparing purpose. Hardness, impact, and tendsile tests were performed to evaluate the development in mechanical properties of the prepared composite. Generally the results show that washed banana peels have more effective than that of un-washed peels, adding banana peels could improve hardness of composite and hardness increase with increasing weight fraction of peels till specific value, (10) % wt. where highest hardness recorded, using high weight fraction of reinforcing phase could negatively effect into mechanical properties of composite, Also the results show that using banana fibers as reinforce phase, didin’t improve impact strength, fracture toughness, and modules of elasticity properties of acrylic.
Characterization of Microstructure and Mechanical Properties of CuCr Alloy Produced by Stir Casting
Authors: Kadhim Eqal Asaad , Sami Abualnoun Ajeel  , Rabiha S. Yaseen
Published: October 2021

The relatively low mechanical properties of pure copper at low and high temperature made it very limited applications. The mechanical properties of the copper can be improved by adding a small amount of elements such as Cr. This work consists of four CuCr alloy castings (0.3, 0.8, 1.2 and 1.5%) by using the stir casting method in an argon atmosphere. Then, the heat treatment was done for these alloys which included solution treatment and aging. Heat treatment was treated at 980 ° C for 1 hour, then water-quenching, followed by an aging treatment at 480 ° C for 2.4 and 6 hours. The Optical Microscopy and the Scanning Electron Microscopy (SEM) with  (EDS) were used to study the microscopic structure of the produced alloys. The results showed that the mechanical properties of copper increased with increasing chromium content. The microstructure of the castings consist of  the dendiritic structure, columinar and segregation. It has been also indicated that after heat treatment and aging, the microstructure changed to fine grains and the clusters disappeared. XRD showed a α-Cu phase and a small amount of CrO2 in microstructures. The highest value of hardness and the ultimate tensile were 101 Hv and 239.12 MPa, respectively. They were achieved at 1.5wt% addition of Cr at 480oC and 4hrs aging
Return to Exercise After Covid-19: Which One is the Best Strategy?
Authors: Erdoğan Murat , Sökülmez-Yildirim Sevgi , Acar Nasuh Evrim , Kamiş Okan
Published: October 2021

Coronavirus (Covid-19), which began in China as of 2019 and spread to almost all over the world in a short time; has shown that we need to plan our life with new strategies as well as changing our current lifestyle today. While we must implement new ways to prevent against Covid-19 and maintaining our healthy lives, we must also design new strategies for returning to sports and physical activities. Therefore, the purpose of this study was to reveal the return strategies for professional and recreational athletes during the quarantine periods in light of evidences. In this regard, firstly we examined the existing literature regarding return strategies to sports. As a result, individual performance and personal hygiene conditions should be considered, and athletic performance should be preserved while keeping a physical distance from teammates and others. The use of masks in sports should be encouraged, but new techniques should be developed by investigating the effect on performance. Consequently, for healthy individuals, low to moderate intensity (not high-intensity) exercise may be beneficial and recommend. However, due to the risk of spreading (person-to-person or contaminated surfaces), exercise is recommended in special places with good ventilation and the use of personal types of equipment.
Role of Fitness Program in a Health Improvement of Adolescents
Authors: Tesanovic Gorana , Bosnjak Goran , Jakovljevic Vladimir , Zrnic Radomir
Published: October 2021

Since physical activities affect the quality of life and activate a complete locomotor system, sports and physical activities can be treated as a determinant for a harmonious development of all child’s characteristics and anthropological characteristics. Because, childhood and youth are the most important formative periods, and some segments of development, for example, specific motor skills can be developed only with means used in sports, this research was conducted to find out do the fitness program (aimed at improving strength) after eight weeks had a positive effect on body composition and mobility and stability of subjects. A control group consisted of 11 female subjects and experimental group were 11 female subjects aged 16 years. The effects of the program on the fitness condition of the subjects were determined by assessing the body composition parameters (data obtained using the Body composition analyser TANITA BC-418) - the total percentage of fat tissue (FAT), the percentage of fat tissue segmentally (percentage of fat tissue of the left leg (FATll), right leg (FATrl), left arm (FATla), right arm (FATra) and body (FATb)) and estimation of mobility and stability levels - based on the application of Functional movement screening (FMS) method (seven tests) before and after the program is implemented. The success of the implemented program was confirmed because the program showed a statistically significant difference between the mobility groups of the subjects in the experimental in relation to the control group (deep squat t=3,464 p=0,006, step over a hurdle t=2,390 p=0,038, active lift of a stretched leg t=2,887 p=0,016, rotatory body stability t=3,130 p=0,011 and FMS t=5,721 p=0,000), and a positive effect on the composition of the body in terms of reduction of the percentage of fatty body has been shown segmentally.
Physiological Response of the Performance of Young Football Players During Small-Sided Games
Authors: Nagy Nikolas , Holienka Miroslav , Babic Matej
Published: October 2021

The main aim of the present study was to examine the cardiovascular response, time-motion characteristics, game performance and rated of perceived exertion (RPE) during small-sided games (SSGs) with different number of players. The research group consisted of elite youth male soccer players (n = 18) (aged 16.5 ±0.71 years, maximum heart rate (HRmax) 196.42 ±5.31 beats.min−1) from the FC DAC 1904 Dunajská Streda U17 soccer club. Cardiovascular response measurements included heart rate (HR) expressed in minimum, mean and maximum values and time spent in different intensity zones. Total distance covered, high intensity running and the number of accelerations and decelerations were captured by GPS. Individual game performance and the number of technical-tactical actions were recorded during every SSGs. After the game time we collected the ratings of perceived exertion scores from each player. Results showed that SSG with small number of players (3 vs. 3) triggered the highest HR response with mean value 168.00 ±8.48 beats.min−1, players spent the most time in maximal intensity zone 0:09:06 minutes, of SSG duration. This format of SSG was the mostintense for the players´ cardiovascular system, but we can’t find statistically significant differences between the HR values in SSGs. External load was the most demanding in SSG1 too, like in internal load. The highest scores in individual game performance were recorded in SSG2. In RPE scores SSG1 was the most difficult from the players point of view. In conclusion, the present research demonstrates the effectiveness of SSG1 in training sessions. Therefore, the coaching staff has the possibility to choose between SSGs during training sessions according to their physical, technical, tactical and psychological objectives.
12 Months of Balance Training Decreases Ankle-Joint Injury Frequency in Young Girl Basketball Players
Authors: Nováková T. , Tufano J. , Veseláková A.
Published: October 2021

Aim: Balance training can help reduce the frequency of ankle joint injuries in adults, but data on young girls is relatively scant.

Methods: Out of 91 female basketball players (7-16 years), 40 players were assigned to an experimental balance training group, and 51 players were assigned to a control group. Both groups performed their typical basketball training but the experimental group performed additional balance-focused exercises during the warm-up of their basketball training sessions.

Results: A total of 47 girls (52 %) reported at least one ankle joint injury in their entire basketball history (52.5 % in the experimental, 50.9% in the control group). There was a positive correlation between the number of ankle joint injuries and age before the experiment (r = 0.34, p < 0.001). During the 12-month study period, girls who participated in balance training suffered significantly fewer ankle joint injuries than the control group (χ2 = 3.8423, df = 1, p-value < 0.05). Increased risk for ankle joint injury in the future was confirmed according to logistic regression for girls with previous ankle joint injury in history (4.33 times) and girls who did not participate in the balance training program (3.97 times).

Conclusions: A progressive, barefoot balance training program that is simple and short enough to be performed during normal warm-ups can reduce the likelihood of suffering an ankle joint injury in young girls basketball players, which may be useful for athletes in other sports as well.
Selected Goal – Scoring Characteristics in the National Hockey League
Authors: Parničan Silvio , Peráček Pavol , Tóth Igor
Published: October 2021

The variables impacting the efficiency of the offensive phase of the game in ice hockey may be determining factor for both the training process and game strategies. The research aimed to acquire and expand the knowledge about selected goal-scoring characteristics in the National Hockey League. A total of 511 even-strength goals were recorded in 129 randomly selected games in a regular-season 2020/2021 by indirect observation. Goals were differentiated by selected variable dimensions: location of the offensive team’s puck possession gain before scoring a goal, game situation preceding a goal, and the number of passes of the offensive team preceding a goal. Data were analyzed by performing a one–way ANOVA. Post hoc multiple comparisons were performed using the Tukey HSD test. The significance level of p ≤ 0.05 was used. Significant differences were found within all variable dimensions (p= 0.00001). In terms of the puck possession gain location, zone 1 (along the boards in the offensive zone) was the zone with the significantly highest mean score (p= 0.00305). Offensive zone play was significantly the game situation preceding most of the goals (p= 0.00000). The interval of the passes that preceded most of the recorded goals was the interval of 1 – 2 passes (p= 0.00000). Acquired results point out the dominance of particular variables and may help coaches to determine the content of the training process and game strategies. Based on the assumption of the realization of similar research in different environments in terms of the quality and age category, if the analogy would be found between the results of the present study and the results of potential studies, we can state the trends applicable to youth training.
Structural, Electronic and Optical Properties of ScxGa1-xP Alloys An: Ab Initio Study
Authors: Nabil Beloufa , Ouadha Ismail , Youcef Cherchab , Louhibi-Fasla Souad , Samir Bekheira , Kamel Hocine , Abdelbasset Baida
Published: October 2021

The structural, electronic and optical properties of the of ScxGa1-xP alloys have been investigated by using the full-potential plane-wave FP-LAPW method as implemented in the Wien2k code. The exchange-correlation (XC) energy of electrons was treated using the Perdewe-Burke-Ernzerhof parametrization (PBEGGA), and the Tran-Blaha modified Beck-Johnson potential (TB–mBJ). The lattice constant and the bulk modulus have been calculated and analyzed where a deviation from Végard’s law is observed for both.

The calculation of the band structure of binary GaP shows that there is an indirect gap of 2.27 eV, while for the ScxGa1-xP compounds there are direct gaps with values of 1.91 eV, 1, 39 eV, 2.04 eV and 1.849 eV for x = 0.25, 0.5, 0, 75 and 1, respectively.

At ambient pressure, the refractive index and the dielectric constant are in good agreement with the experimental results. The extinction coefficient does not begin to increase until a threshold, which represents the optical gap. This threshold is equal to 1.224 eV and it starts to increase to reach a maximum at an energy of 3.551 eV.
Optimisation of structural parameters of the industry by the criterion of product innovation
Authors: Ishchuk Svitlana , Sozanskyy Luybomyr , Pukała Ryszard
Published: October 2021

The industrial sector of the Polish economy plays an important role in ensuring the socio-economic development of the country. The Polish industry accounts for 24.1 % of the country’s employed population and 25.1 % of the GVA. The article aims to model the structural parameters of the Polish industrial sector according to the criterion of increasing product innovation level based on a comprehensive assessment of the Polish industry performance in the regional context. The offered method focuses on estimating the industrial sector at the macro and meso levels using a set of indicators for investment, innovation, labour activity, and profitability. Correlation-regression analysis methods were used to prove hypotheses about the impact of product innovation on employment and wages in the industry. To optimise the structure of the Polish industrial sector, an economic-mathematical model was developed, which was solved using the linear programming method. The target functionality of this model is the level of product innovation, at which the gross average monthly wage of Polish industry workers will double (to the EU average). The simulation results, which was based on data from the Central Statistical Office of Poland, provide an analytical basis for selecting industrial policy benchmarks for Poland.
Application of factor analysis in company management – selected examples related to competitiveness and market success
Authors: Jurczak Jolanta , Jurczak Grzegorz
Published: October 2021

Factor analysis is a standard statistical technique for reducing data dimensionality, which is widely used in sociology, psychology, and demography. Also, financial and insurance institutions commonly use such a technique for marketing research. In recent years, factor analysis has been used, at the beginning rather diffidently, to analyse selected problems of business management, e.g. to troubleshoot consumer and company communication. There are some literature reports about the successful use of factor analysis in managing a company area. Nevertheless, the literature seems to lack examples with successful use of the method with a clear explanation of its rather difficult application in the field of competitiveness or potential company boost. The modest popularity of such a powerful technique in this particular field seems to be attributed mainly to the complexity of the method and its requirements concerning the data quantity. Besides, the factor analysis technique has great potential and can be used as an efficient tool to reduce the complexity of observed phenomenon or verify the accuracy of theoretical models. Therefore, the purpose of this paper is to present a vast potential of factor analysis (both exploratory and confirmatory) applied to solve various problems in company management, especially related to competitiveness and market success. Two case studies covering the subject of business management are presented to illustrate the benefits of factor analysis application. The exploratory factor analysis is exemplified by the search of factors related to the commercial success of the company, while the confirmatory technique is illustrated by a case study of the intellectual capital of the company and its factors related to competitiveness. The paper also presents the essence of the factor analysis, types of analysis, subsequent procedures, purposes, and its specific features. Finally, the applicability of the factor analysis to solve management issues and possible gain in management are discussed.
Improvement of production process capability — a case study of two furniture companies
Authors: Sujová Andrea , Simanová Lubica
Published: October 2021

The article aims to assess the improvement of the process capability by implementing the Six Sigma methodology in furniture enterprises with different levels of the quality management system (QMS) and ownership. The implementation of the Six Sigma methodology according to the DMAIC steps, also analysis, evaluation, and comparison of the implementation results were performed to improve the process performance. The implementation of the Six Sigma methodology was carried out in an international enterprise with foreign capital and a certified Quality Management System (QMS) and in a domestic enterprise with purely domestic capital without an established Quality Management System. The implementation results confirmed the positive development in the key indicators of critical processes, namely, in the reduction of DPMO, the increase of efficiency and the level of Sigma Process, and the values of process capability indices. The positive effects were more pronounced in the international enterprise compared to the domestic. The application of the Six Sigma methodology brings better results in manufacturing companies with international management skills and implemented certified QMS. These two aspects can be key success factors by managing and improving process capability. The practical contribution of the paper can be seen in the proposal of suitable methods and tools by implementing Six Sigma conception in furniture manufacturing regardless of the ownership or level of quality management systems.
Critical Evaluation into the practical utility of the Design of Experiments
Authors: Sharma Mithun , Sharma Shilpi
Published: October 2021

The research aims to emphasise the relevance of the Design of Experiments (DOE) technique as a reliable method for ensuring efficient use of statistical methods in routine industrial processes. A case study approach with a deductive strategy was used to assess the effectiveness of different DOE methods to achieve the desired objectives. Screening, mid-resolution and high-resolution DOE methods helped identify, characterise, and optimise an experimental variable against the desired output response. A general framework for effective DOE is provided as part of DOE planning, including defining DOE objectives, selection criteria, noise reduction, and application across industries. Overall, various DOE models proved successful in identifying a complicated relationship between experimental variables and output response. However, when ideal DOE models may not be feasible, reducing test run by choosing lower resolution DOE or fewer replicates can still provide important insights into the experimental variables’ impact on output responses.
Impact of the COVID-19 pandemic on logistics firms and their resilience: case studies in Thailand
Authors: Ketudat Sun , Jeenanunta Chawalit
Published: October 2021

The novel Coronavirus (COVID-19) is an infectious disease that is currently causing challenges and opportunities in all sectors worldwide. The logistic industry plays an enormous role in keeping the countries functional, and it accounts for 13.4 % of the total GDP in Thailand. This article aims to identify and justify critical success factors for the Logistic Industries experiencing success and failure during the pandemic. The research was conducted using semi-structured interviews with top managers of three companies from March to September 2021, which is phase 4 of the pandemic. The findings we analysed using thematic analysis to understand the critical factors within the industry. Logistics companies of different sizes were selected for this purpose as case studies aimed to identify the resemblance of the effects and find the relationship with company resilience. Five key supporting factors were identified for the logistics firms to be resilient during the pandemic, including flexibility, Business Continuity Plan, market diversification, IT systems, and leadership.
Gerontechnology — new opportunities in the service of older adults
Authors: Halicka Katarzyna , Surel Dariusz
Published: October 2021

The increasingly more visible trend of population ageing necessitates creating technologies supporting the functioning of older adults. Consequently, more gerontechnologies emerge designed to help the older adults in their daily functioning, from devices monitoring the health to special trolleys improving the mobility or Virtual Reality devices for active learning. This article aimed to determine the most desired group of gerontechnologies among current and future users. It focused on individual assessments of the most desirable group of gerontechnologies based on various criteria. The investigation aimed to find the criterion rated the highest in the selected group of gerontechnologies. The gerontechnology group was assessed against seven groups of criteria distinguished by the authors, i.e., Technology Innovation, Technology Demand, Social and Ethical Criteria, Technology Usability, Technology Functionality, Technology Ease of Use and Technology Use Risk. The survey was conducted in the form of a questionnaire, using CAWI (Computer-Assisted Web Interview) and CATI (Computer-Assisted Telephone Interview) methods, with the research sample comprised of 1 152 residents of Poland. Thus far, no studies have been conducted to evaluate this group of technologies based on the above-mentioned criteria.
Factors influencing the adoption of Building Information Modelling (BIM) in the South African Construction and Built Environment (CBE) from a quantity surveying perspective
Authors: Venter Berco , Ngobeni Sams Pfukani , du Plessis Hendri
Published: October 2021

The construction industry has often been described as stagnant and out-of-date due to the lack of innovation and innovative work methods to improve the industry (WEF, 2016; Ostravik, 2015). The adoption of Building Information Modelling (BIM) within the construction industry has been relatively slow (Cao et al., 2017), particularly in the South African Construction and Built Environment (CBE) (Allen, Smallwood & Emuze, 2012). The purpose of this study was to determine the critical factors influencing the adoption of BIM in the South African CBE, specifically from a quantity surveyor’s perspective, including the practical implications. The study used a qualitative research approach grounded in a theoretical framework. A survey questionnaire was applied to correlate the interpretation of the theory with the data collected (Naoum, 2007). The study was limited to professionals within the South African CBE. The study highlighted that the slow adoption of BIM within the South African CBE was mainly due to a lack of incentives and subsequent lack of investment towards the BIM adoption. The study concluded that the South African CBE operated mainly in silos without centralised coordination. The BIM adoption was only organic. Project teams were mostly project orientated, seeking immediate solutions, and adopted the most appropriate technologies for the team’s composition. The study implies that the South African CBE, particularly the Quantity Surveying profession, still depends heavily on other role-players in producing information-rich 3D models. Without a centralised effort, the South African Quantity Surveying professionals will continue to adopt BIM technology linearly to the demand-risk ratio as BIM maturity is realised in the South African CBE.
Preliminary Risk Analysis of Low Pressure Railway Transport
Authors: Papis Mateusz , Matyjewski Marek
Published: October 2021

The subject of this study is a preliminary risk analysis during travel by the low pressure railway Hyperloop. The main objective was to formulate recommendations related to the development of the project of the new transport mode. The main analysis was preceded by the identification of Man – Machine - Environment system. Undesirable events were identified for each of the specified steps of a ride. For each event, a risk assessment was performed using Risk Score based method. The causes, effects and preventive actions were also listed. Events with the highest risk score were indicated. The need to develop procedures for safety checks and emergency situations was pointed out. It was shown that the safety analysis of the transport system should be extended after a final project development of the railway system and the necessary infrastructure.
Analysis of the possibility of using a geogrid to improve load bearing capacity of natural airfield pavements
Authors: Kowalewska Agata , Włodarski Piotr , Pietruszewski Paweł
Published: October 2021

The article presents an innovative method that was verified in the field. It is aimed to improve the load bearing capacity of airfield pavements, which are one of the elements of the flight safety system. Airfield pavements protect the runway in case when the aircraft is taxiing beyond the runway. Moreover, they are also used to perform starting and landing operations of military aircraft. Due to this, they need to have an adequate load bearing capacity that ensures the safety of performing aircraft flights. Airports cannot afford to be shut down for a long time; thus, it is essential to look for efficient and fast solutions that could improve the load bearing capacity of airfield pavements. The authors suggested to apply geogrid immersed in natural airfield pavement.
Seroprevalence of feline foamy virus in domestic cats in Poland
Authors: Materniak-Kornas Magdalena , Frymus Tadeusz , Löchelt Martin , Kuźmak Jacek
Published: October 2021

Introduction

Feline foamy virus (FFVfca) is widespread and its prevalence in naturally infected domestic cats ranges between 30% and 80% worldwide. The infection is persistent, with a sustained antibody response in FFVfca-positive cats; however to date, no defined disease or clinical symptoms have been proved to be associated with it. The goal of the presented study was to determine the prevalence of FFVfca infection in domestic cats in Poland.

Material and Methods

A total of 223 serum samples collected from domestic cats were tested with a glutathione S-transferase capture ELISA test to detect antibodies specific to capsid (Gag), accessory (Bet) and envelope (Env) FFVfca antigens. A Western blot test was used to confirm the ELISA results.

Results

The cut-off value for the Gag antigen was established by calculation and evaluation with the immunoblotting assay. The cut-off values for Bet and Env were calculated from the reactivity of Gag-negative samples. The sera of 99 cats (44%) showed reactivity to Gag, those of 80 did so (35.9 %) to Bet, while only 56 samples (25%) were reactive to Env. Only 51 (22.9%) sera were positive for all antigens. The main diagnostic antigen was selected to be Gag. A statistically significant association was found between FFVfca status and the age of the cat.

Conclusions

This study proved the high seroprevalence of FFVfca in domestic cats in Poland for the first time and confirmed that adult cats are at higher FFVfca infection risk than preadult cats. Its results correspond to those reported from other countries.
Evaluation of Solar Energy Efficiency by Composite Index over Four Continents
Authors: Haine Kamel , Blumberga Dagnija
Published: October 2021

This paper aims to provide an evaluation of solar energy efficiency by composite index and to compare the value of solar energy across 19 countries located over four continents: Europe, Africa, America, and Asia. 15 indicators were evaluated for the year of 2019 and grouped into four dimensions: economic, social, technical, and environmental. Analytical Hierarchy Process (AHP) was used to estimate the weight of each indicator, and consistency tests were calculated to evaluate weight efficiency. The obtained results of the SEI reveals that the technical dimension and economic dimension play an important role in the solar energy efficiency of a country. The results indicate potential improvement areas for increasing solar efficiency. SEI can be used as a tool in assessing solar energy potential integration in a country.
Heat Pump Use in Rural District Heating Networks in Estonia
Authors: Lepiksaar Kertu , Kalme Kiur , Siirde Andres , Volkova Anna
Published: October 2021

District heating has proven to be an efficient way of providing space heating and domestic hot water in populated areas. It has also proven to be an excellent way to integrate various renewable energy sources (RES) into the energy system. In Estonia, biomass covers most of the heat demand, but carbon-intensive fuels are still used to cover peaks and lows. Heat pumps can be a good solution for rural areas, as there is usually plenty of land available for heat pump facilities. In addition, heat pumps require low-grade heat sources such as ambient air, groundwater, lakes, rivers, sea, sewage water, and industrial waste heat. One of the downsides of heat pumps is the need for large investments compared to boilers fired by natural gas and biomass, and electric boilers. This study examines the impact of heat pump use on consumer prices for district heating in rural district heating networks in Estonia.
Environmental Aspects of Resource-Saving Cement Technology
Authors: Miryuk Olga
Published: October 2021

The article outlines the main problems that the cement industry causes to the environment. Authors propose technological solutions aimed at resource-saving in cement production and environmental protection. The research is devoted to low-energy cement obtained on the basis of waste from processing skarn-magnetite ores. The characteristics of the composition and properties of the technogenic material are given. The authors have justified the feasibility of using skarn-magnetite ore enrichment waste as a part of a cement raw material mixture. The possibility of changing the composition of cement by reducing the energy-intensive alite phase is demonstrated. Technological and heat engineering calculations confirming the reduction of natural mineral raw materials and fuel costs in the production of cement were carried out. The processes of hydration of the developed cements have been investigated. A method for accelerating the hardening of low-base cements due to mechanical activation, the introduction of mineral additives and a modifier is proposed. The research revealed construction and technological advantages of the developed cements, which exhibit increased resistance during operation in an aggressive environment. Physical and mechanical tests of concretes made of low-base cement were carried out. The possibility of reducing the temperature during the heat treatment of concrete is proved. Physical and mechanical tests of concretes made of low-base cement were carried out. The paper presents environmental benefits of the developed cement technology.
On the Classification of Solutions of Quantum Functional Equations with Cyclic and Semi-Cyclic Supports
Authors: Nguyen Lan
Published: October 2021

In this paper, we classify all solutions with cyclic and semi-cyclic semigroup supports of the functional equations arising from multiplication of quantum integers with fields of coefficients of characteristic zero. This also solves completely the classification problem proposed by Melvyn Nathanson and Yang Wang concerning the solutions, with semigroup supports which are not prime subsemigroups of ℕ, to these functional equations for the case of rational field of coefficients. As a consequence, we obtain some results for other problems raised by Nathanson concerning maximal solutions and extension of supports of solutions to these functional equations in the case where the semigroup supports are not prime subsemigroups of ℕ.
The Inequality of Erdős-Turán-Koksma in the Terms of the Functions of the System Γ ℬ
s
Authors: Petrova Tsvetelina
Published: October 2021

In the present paper the author uses the function system Γ
ℬ

s

constructed in Cantor bases to show upper bounds of the extreme and star discrepancy of an arbitrary net in the terms of the trigonometric sum of this net with respect to the functions of this system. The obtained estimations are inequalities of the type of Erdős-Turán-Koksma. These inequalities are very suitable for studying of nets constructed in the same Cantor system.