bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determining the mechanism for generating cavitation pressure fluctuations in throttle devices at high-head throttling of liquid
Authors: Tarasenko Taras , Badakh Valerii , Makarenko Mykola , Lukianov Pavel , Dubkovetskiy Igor 
Published: September 2024

The object of this study is the process of generating cavitation pressure fluctuations behind the throttle device at high-head throttling of liquid. This paper addressed the problem of calculating the amplitude of cavitation pressure fluctuations at high-pressure liquid throttling. It was established that cavitation pressure fluctuations are a consequence of collisions of discrete masses of a transiting liquid jet in the region of pressure recovery. The range of cavitation pressure fluctuations reaches the pressure values at the inlet to the throttle device. The frequency band of cavitation pressure fluctuations is in the range from 1.5 to 20 kHz and higher. At high-head throttling of the liquid, caverns attached to the surface of the throttle channel, moving caverns and small bubbles in the transit flow are formed. Moving caverns compress the transit flow and divide it into separate fluid blocks. In the region of pressure restoration, the moving caverns are slammed shut and discrete fluid blocks collide. This causes high-frequency pressure fluctuations. Special feature of the results is the possibility of estimating the range of cavitation pressure fluctuations depending on the pressure drop on the throttle device. When the back pressure on the throttle device increases, the amplitude of cavitation pressure fluctuations decreases, and the frequency band shifts to the high-frequency region. The results make it possible to calculate the range of cavitation oscillations, to predict the development of cavitation erosion of materials depending on the parameters of throttling of the working fluid. The results of the work are used to design devices for cleaning products from contamination, for determining the volume content of water in aviation fuel, for intensification of technological processes in the chemical and food industries.
Substantiating the feasibility of processing the secondary product obtained after osmotic dehydration of dried apricots
Authors: Samilyk Maryna , Tkachuk Mykhaylo , Paska Mariia , Ryzhkova Taisia , Tkachuk Svetlana , Petrenko Alla , Hrinchenko Dmytro , Gurskyi Petro , Savchuk Liubov , Yarmosh Tetyana 
Published: September 2024

The object of research is the production technology of dried apricots by the method of osmotic dehydration and the derived products that are formed in the process. An improved technology for processing the secondary product of apricot production has been proposed, which is based on increasing the osmotic pressure in the cells of plant raw materials by increasing the concentration of dry substances. The improved technology involves the use of the process of osmotic dehydration in a 70 % sugar solution with a temperature of up to 55±5 °C as an alternative to the blanching process. This provides a reduction in drying time to 1 hour due to the partial transition of water from the fruit cells into the sugar solution. The spent osmotic solution contains biologically valuable substances. The mass fraction of dry substances in the spent solution decreased by 17.4 %. It was found that spent osmotic solutions contain 15.87±0.05 mg/100 carotenoids, which cause their orange color. Color stability is likely caused by the acidity of the osmotic solution (pH=3.7±0.05). As a result of hydrolysis, sucrose, which was the main component of the osmotic solution before dehydration of apricot fruits, is partially inverted into glucose (21.41±0.05) and fructose (19.99±0.05 g/100 g). Fortified sugar had a light beige color, pure without stains and impurities, sweet taste, and aroma of apricot. The jelly-like soft drink, made on the basis of a derivative product formed during the production of dried apricots, had a sweet taste, a slight aroma of apricot. The color of the meal is cream. Light straw-colored jelly, sweet in taste, with a faint aftertaste and aroma of apricot, had a jelly-like uniform consistency that can be cut. The study showed the possibility of practical application of derived products, which are usually disposed of, for production
Identifying the effect of adding coconut coir on the characteristics of the top layer of pure natural buton asphalt concrete wearing course (AC-WC)
Authors: Arifin Muhammad Zainul , Wicaksono Achmad , Bowoputro Hendi , Ghufron Raden Rayhan , Abdurrahman Muhammad Yusuf 
Published: September 2024

Buton Asphalt is natural asphalt originating from Buton Island (Indonesia), with the potential deposit amount reaching up to 662 million tons. This substantial domestic mining potential must be utilized for domestic road needs and to boost the country's economy. However, Buton asphalt's utilization is minimal compared with imported oil asphalt, which reached a usage rate of up to 94 % in 2022. Therefore, as a form of a solution-oriented policy, Buton asphalt is included as one of the 21 commodities in the Strategic Roadmap for Downstream Investment in Indonesia, followed by various supportive regulations for developing this Buton asphalt product. One of the leading products the government targets is natural pure Buton asphalt. This product consists of >99 % bitumen content after extraction, also called Pure Buton Asphalt. The idea was to modify pure Buton asphalt with coconut coir to increase the Marshall Stability and Dynamic Stability values to make the asphalt mixture more resistant to vehicle loads and rutting. The tests were conducted to determine the optimum asphalt content (OAC) of the mixtures, Marshall's Stability comparison, and the dynamic stability test using a Wheel Tracking Machine to identify the comparison of permanent deformation. This study analyzed the Marshall characteristics and dynamic stability characteristics with variations in coconut coir content of 0.5 %, 0.75 %, and 1 % by weight of asphalt and variations in coconut coir length of 0.5 cm, 1 cm, and 1.5 cm. Based on the results of this study, the optimum asphalt content in this study is 6.76 %, where pure Buton Asphalt modified with coconut coir has an increase in Marshall's stability value and dynamic stability value compared to pure Buton asphalt without additional coconut coir
Optimizing the uncertainty of measurements on a coordinate measuring machine when controlling complex geometric surfaces
Authors: Kvasnikov Volodymyr , Chalyi Oleg , Graf Maryna , Perederko Anatolii 
Published: September 2024

The object of this study is the process of optimizing measurement uncertainty on a coordinate measuring machine (CMM) when inspecting complex geometric surfaces. The problem addressed was insufficient accuracy and efficiency of measurements of complex parts on CMMs under production conditions. A method for optimizing measurement uncertainty has been devised, which includes a mathematical model of the measurement process and an adaptive algorithm for optimizing the control strategy, based on the Monte Carlo method. The model takes into account the geometry of surfaces and CMM characteristics, while the algorithm dynamically adjusts measurement parameters. The results demonstrate a reduction in measurement uncertainty by 15–20 % and a reduction in inspection time by 10–12 % compared to conventional methods. This is achieved by taking into account the specificity of complex surface geometry and an adaptive approach.
The uniqueness of the developed method is the ability to automatically adapt to different types of CMMs and measured objects, optimizing the number and location of measurement points, the speed of probe movement, and its contact force with the surface. The method takes into account not only the geometric parameters of objects but also the characteristics of the CMM itself, which allows for high accuracy. The method is particularly effective for parts with complex geometry, in which conventional methods often lead to significant errors.
Practical application is possible at machine-building enterprises for quality control of complex parts, especially in serial production. The implementation of the developed method allows for improving product quality and reducing production costs by 8–10 % due to optimization of the control process and reduction of defects
Optimizing dye-sensitized solar cell efficiency through TiO2/CuS doping: effects of internal parameter variations
Authors: Supriyanto Edy , Nawafil Moh. , Subekti Agus 
Published: September 2024

Dye-sensitized solar cells (DSSC) have attracted significant research interest due to their semi-transparency, ease of fabrication, cost-effectiveness, and environmental friendliness. This research focuses on enhancing dye-sensitized solar cells efficiency by doping titanium dioxide with copper sulfide and varying internal parameters such as concentration, thickness, and temperature. The primary issue addressed is the low electron mobility of titanium dioxide, which limits its performance as a photoanode. Using simulation methods, this study analyzed dye-sensitized solar cells performance under different doping conditions. The results showed that the highest efficiency of 8.18 % was achieved at a TiO2/CuS concentration of 0.3 %. The optimal photoanode thickness was approximately 3 μm, yielding an efficiency of 8.33 %. Temperature variations at room temperature (275 K, 300 K, and 325 K) resulted in efficiency values of 13.94 %, 15.06 %, and 16.18 %, respectively. These findings indicate that targeted doping and precise control of internal parameters can significantly enhance the performance of titanium dioxide-based dye-sensitized solar cells. The improved efficiency is attributed to enhanced electron mobility and better structural and morphological characteristics of the doped titanium dioxide photoanode. This research provides valuable insights into developing more efficient and sustainable dye-sensitized solar cells. The practical implications of these results are significant for advancing dye-sensitized solar cells as a viable alternative to conventional solar cells, contributing to the global effort to address the energy crisis by providing a cost-effective and environmentally friendly energy source.
Improvement of the delumping method in order to obtain detailed characteristics of the fluid
Authors: Baibekova Ayaulym , Ismailova Jamilyam , Delikesheva Dinara , Abdukarimov Aibek , Kaidar Aigerim 
Published: September 2024

In compositional modeling, the phase characteristics and behavior of reservoir fluids are calculated using the equation of state. To simplify the calculations and speed them up, the components of the heptane plus fraction (C7+) are grouped into pseudo-components. However, after this procedure, the results of compositional modelling of the reservoir containing the pseudo-components need to be delumped so that they can be used in surface models. It follows from this that the problem lies in the fact that the grouped composition cannot be applied to the modeling of ground structures. The object of the study is Kazakhstani oil, on the example of which a detailed component composition was obtained by analytical delumping based on reduction parameters. In laboratory conditions, the component composition of oil, and other fluid properties were determined. The study presents the results that prove the importance of applying the delumping algorithm in the context of compositional modeling. The results obtained analytically correspond quite accurately to the numerical calculations of the PVTsim software and laboratory experiments. A comparison of existing methods showed a difference of 5 %, which suggests that delumping is an excellent method for describing and obtaining a detailed composition of the hydrocarbon mixture. In practice, the results of the detailed composition of hydrocarbons can be used for the design of refineries. Also, the findings from this research can enhance the planning and design of surface facilities, particularly when developed under reservoir conditions where the pressure exceeds the saturation pressure
Substantiating the reliability conditions for the production process at metallurgical enterprises through the fault-tolerant functioning of the system «extraction of raw materials – technological railroad routes – metallurgical production»
Authors: Zaruba Oleksandr , Okorokov Andrii , Vernyhora Roman , Zhuravel Iryna , Barkalova Nataliia 
Published: September 2024

The object of this study is the process of formation of insurance reserves at enterprises in the metallurgical industry. Under conditions of uneven supply of raw materials to metallurgical enterprises due to disruption of the transportation process or other reasons, there is a need to create insurance stocks in order to ensure the continuity of production. At the same time, it is necessary to take into account existing restrictions, such as the limited capacity of railroad sections and the impossibility of organizing parallel movement of trains, etc. The presence of these limitations makes it impossible to use classical methods for solving similar problems, such as linear programming. Therefore, to resolve the task, a simulation model was built, based on the discrete-event principle in the AnyLogic University Researcher environment using Oracle libraries and the Java SE compiler. With the help of the model, the process of rotation of dispatch routes at the railroad yard with multiple suppliers and one consignee was formalized. The optimization criterion was chosen to be the minimum deviations of fluctuations in reserves of iron ore concentrate and coke. Analysis of the simulation results revealed that the optimal size of the fleet of railroad routes on the selected rotation polygon is 30 units; at the same time, their utilization rate will be 65 %. It was also established that fluctuations in raw material stocks have a «natural character», which is confirmed by the normal distribution of the density of stock volumes. Under these conditions, the value of fluctuations in the volumes of the main raw materials will be ±13115 t/day for iron ore concentrate, and ±5298 t/day for coke. Reducing the range of fluctuation of raw materials volumes could make it possible to optimize the costs of creating stocks and streamline the transport work of the enterprise for providing raw materials
IMPACT OF ADENOTONSILLECTOMY ON ASTHMA CONTROL IN PEDIATRIC PATIENTS: A SYSTEMATIC REVIEW
Authors: Skarzynski Piotr H. , Chmiela Szymon , Kołodziejak Aleksandra 
Published: September 2024

IntroductionThis systematic review investigates the influence of adenotonsillectomy (AT) on asthma control in pediatric patients.Material and methodsA literature review from 2000 to 2023 based on the databases PubMed, the Cochrane Library, and Web of Science. The analysis is distilled down to four studies that revealed positive outcomes in asthma control as gauged by the Asthma Control Test (ACT), the Childhood Asthma Control Test (C-ACT), clinical outcomes, and asthma-related chitinase levels.ResultsThe four studies consistently demonstrated improved asthma control postoperatively in terms of improved ACT scores, reductions in acute asthma exacerbations, emergency room visits, hospitalisations, and medication usage. Notably, the correlation between improved asthma
control and decreased chitinase activity suggests that AT has an impact on molecular markers associated with asthma.ConclusionsThe findings underline the potential benefits of AT in pediatric asthma management. However, the limitations of this study include a small number of studies and potential biases related to asthma’s natural course and seasonal variations. While the review provides evidence for the positive impact of AT on asthma control, further research with longer follow-up periods, case-matched controls, and consideration of seasonal factors is recommended.
SPEECH PERCEPTION IN NOISE IN MALAYALAM-SPEAKING YOUNG ADULTS WITH NORMAL HEARING
Authors: Ghosh Vipin , Devananda Darshan , S B Harisanker , Kumar Harshan 
Published: September 2024

IntroductionVarious types of noise have been used with speech material to assess speech perception in noise (SPIN) abilities. The literature suggests that speech identification varies with different types of background noise, and it has been reported that the target native language and the language of the babbling influence performance. Such efforts in an Indian context have not yet been reported. The aim of the study is to evaluate the speech perception in noise performance of Malayalam-speaking young adults with normal hearing using three different
background noises.Material and methodsA repeated measure research design were adopted with a random sampling method. 30 native Malayalam speakers with normal hearing between the ages of 18 and 25 participated in the study. A standardized sentence list in Malayalam was used as the speech stimulus. Nine lists were chosen and randomly divided so that there were three lists to each background noise. Noises were speech spectrum-shaped noise, non-native language multi-talker babble (Kannada), and native language multi-talker babble (Malayalam). Each successfully
repeated keyword received a ‘1’ and each incorrectly repeated word received a ‘0.’ Because each sentence had four important words, each collection of 10 sentences scored a maximum of 40. The percentage of correct answers was determined and further analyzed.ResultsScores were significantly different in all three different background noises across different SNRs. The highest scores were obtained at +5 dB SNR and the poorest scores at –5 dB SNR. Among the three different background noises, native multi-talker babble (Malayalam)
yielded better scores than non-native multi-talker babble (Kannada), followed last by speech spectrum-shaped noise.ConclusionsThe findings of the current study may be attributed to the increased efficacy of speech spectrum noise due to its energetic masking characteristics and the similarity between the two languages in terms of its origin and acoustic-phonetic properties.
PENGEMBANGAN MODUL CETAK 1000 HARI PERTAMA KEHIDUPAN (HPK) BAGI KADER BINA KELUARGA BALITA (BKB) DI BKKBN
Authors: Nurhayati Yayat 
Published: September 2024

Penelitian ini bertujuan untuk mengembangkansebuah produk berupa paket modul cetak 1000 Hari Pertama Kehidupan (HPK) untuk pelatihan Kader Bina Keluarga Balita (BKB) di BKKBN. Paket modul dikembangkan untuk meningkatkan pengetahuan kader BKB tentang program 1000 Hari Pertama Kehidupan. Adapun latar belakang dari program 1000 Hari Pertama Kehidupan adalah untuk mengatasi tingginya angka stunting di Indonesia. Menurut Badan Kesehatan Dunia WHO Indonesia berada di urutan ke-lima jumlah anak dengan kondisi stunting. Metode Penelitian yang digunakan adalah metode Research and Development (R D). Menggunakan model pengembangan Rowntree, yang terdiri dari tiga tahap yaitu 1) tahap perencanaan, 2) tahap persiapan penulisan, 3) tahap penulisan dan penyuntingan. Produk yang dihasilkan terdiri dari empat buah modul dan satu buku petunjuk penggunaan bagi instrukstur/widyaiswara. Untuk melihat kelayakan modul, peneliti melakukan validasi/telaah ahli, ujicoba face to face, dan ujicoba lapangan/field trials. Hasil validasi dari ahli materi, ahli desain instruksional, dan ahli bahasa menyatakan bahwa modul cetak 1000 Hari Pertama Kehidupan dinilai sangat baik. Hasil ujicoba face to face dan field trials terhadap modul 1000 Hari Pertama Kehidupan, menunjukkan bahwa modul layak digunakan. Hasil uji-t menunjukkan terdapat terdapat perbedaan yang signifikan sehingga modul cetak 1000 Hari Pertama Kehidupan dikatakan efektif meningkatkan hasil belajar peserta pelatihan. Penelitian ini bertujuan untuk mengembangkansebuah produk berupa paket modul cetak 1000 Hari Pertama Kehidupan (HPK) untuk pelatihan Kader Bina Keluarga Balita (BKB) di BKKBN. Paket modul dikembangkan untuk meningkatkan pengetahuan kader BKB tentang program 1000 Hari Pertama Kehidupan. Adapun latar belakang dari program 1000 Hari Pertama Kehidupan adalah untuk mengatasi tingginya angka stunting di Indonesia. Menurut Badan Kesehatan Dunia WHO Indonesia berada di urutan ke-lima jumlah anak dengan kondisi stunting. Metode Penelitian yang digunakan adalah metode Research and Development (R D). Menggunakan model pengembangan Rowntree, yang terdiri dari tiga tahap yaitu 1) tahap perencanaan, 2) tahap persiapan penulisan, 3) tahap penulisan dan penyuntingan. Produk yang dihasilkan terdiri dari empat buah modul dan satu buku petunjuk penggunaan bagi instrukstur/widyaiswara. Untuk melihat kelayakan modul, peneliti melakukan validasi/telaah ahli, ujicoba face to face, dan ujicoba lapangan/field trials. Hasil validasi dari ahli materi, ahli desain instruksional, dan ahli bahasa menyatakan bahwa modul cetak 1000 Hari Pertama Kehidupan dinilai sangat baik. Hasil ujicoba face to face dan field trials terhadap modul 1000 Hari Pertama Kehidupan, menunjukkan bahwa modul layak digunakan. Hasil uji-t menunjukkan terdapat terdapat perbedaan yang signifikan sehingga modul cetak 1000 Hari Pertama Kehidupan dikatakan efektif meningkatkan hasil belajar peserta pelatihan.
METODE PENCEGAHAN KEKAMBUHAN LUARAN REHABILITASI BERBASIS KEAGAMAAN DI MADRASAH TSANAWIYAH SERBA BAKTI SURYALAYA
Authors: S Nurhamzah C , Susilana Rudi , Rusman Rusman 
Published: September 2024

Problematika penyalahgunaan NAPZA merambah ke seluruh lapisan masyarakat Internasional termasuk Indonesia sampai tingkat yang menghawatirkan. Laporan BNN menyebutkan, 70 % pengguna narkoba adalah pelajar. Pemerintah dan swasta bahu membahu melakukan pencegahan dan penanggulangan penyalahgunaan NAPZA termasuk mencegah kekambuhan. Tujuan artikel untuk memproleh data tentang metode pencegahan kekambuhan penyalahgunaan NAPZA di MTs Serta Bakti Suryalaya. Desain penelitian adalah deskripsi kualitatif dengan melalui wawancara mendalam dengan kepala madrasah, wakil kepala, guru, tenaga pendidik dan kajian teoritik dari jurnal atau artikel dan bahan bacaan lainnya yang mendukung sebagai teknik pengumpulan datanya. Teknik analisis data dilakukan sejak sebelum memasuki lapangan sampai selesai di lapangan dengan mengacu pada model analisis interaktif Miles dan Huberman dengan langkah-langkah: data collection, data reduction, data display, dan conclusion (drawing/verivying) dan pengujian keabsahan data menggunakan triangulasi Creswell. Hasil penelitian menunjukan metode pencegahan kekambuhan yang dilakukan di MTs Serba Bakti Suryalaya dengan menggunakan metode terapi, yakni 1) metode terapi kognitif perilaku (Cognitive Behavior Therapy) dengan mengoptimalkan peran guru BP; 2) terapi religi / spiritual dengan menjalankan kegiatan keagamaan khususnya amaliah TQN, dan 3) terapi air (hydro therapy) yakni terapi mandi taubat. Disarankan untuk peneliti berikut dapat meneliti yang berhubungan dengan dampak dari metode-metode tersebut terhadap penyembuhan pecandu NAPZA.