bluuebunny/crossref_metadata_2025 huggingface dataset:
TOI-663: A newly discovered multi-planet system with three transiting mini-Neptunes orbiting an early M star
Authors: Cointepas M. , Bouchy F. , Almenara J. M. , Bonfils X. , Astudillo-Defru N. , Knierim H. , Stalport M. , Mignon L. , Grieves N. , Bean J. , Brady M. , Burt J. , Canto Martins B. L. , Collins K. A. , Collins K. I. , Delfosse X. , de Medeiros J. R. , Demory B.-O. , Dorn C. , Forveille T. , Fukui A. , Gan T. , Gómez Maqueo Chew Y. , Halverson S. , Helled R. , Helm I. , Hirano T. , Horne K. , Howell S. B. , Isogai K. , Kasper D. , Kawauchi K. , Livingston J. H. , Massey B. , Matson R. A. , Murgas F. , Narita N. , Palle E. , Relles H. M. , Sabin L. , Schanche N. , Schwarz R. P. , Seifahrt A. , Shporer A. , Stefansson G. , Sturmer J. , Tamura M. , Tan T.-G. , Twicken J. D. , Watanabe N. , Wells R. D. , Wilkin F. P. , Ricker G. R. , Seager S. , Winn J. N. , Jenkins J. M.
Published: January 2024

We present the detection of three exoplanets orbiting the early M dwarf TOI-663 (TIC 54962195; V = 13.7 mag, J = 10.4 mag, R★ = 0.512 ± 0.015 R⊙, M★ = 0.514 ± 0.012 M⊙, d = 64 pc). TOI-663 b, c, and d, with respective radii of 2.27 ± 0.10 R⊕, 2.26 ± 0.10 R⊕, and 1.92 ± 0.13 R⊕ and masses of 4.45 ± 0.65 M⊕, 3.65 ± 0.97 M⊕, and <5.2 M⊕ at 99%, are located just above the radius valley that separates rocky and volatile-rich exoplanets. The planet candidates are identified in two TESS sectors and are validated with ground-based photometric follow-up, precise radial-velocity measurements, and high-resolution imaging. We used the software package juliet to jointly model the photometric and radial-velocity datasets, with Gaussian processes applied to correct for systematics. The three planets discovered in the TOI-663 system are low-mass mini-Neptunes with radii significantly larger than those of rocky analogs, implying that volatiles, such as water, must predominate. In addition to this internal structure analysis, we also performed a dynamical analysis that confirmed the stability of the system. The three exoplanets in the TOI-663 system, similarly to other sub-Neptunes orbiting M dwarfs, have been found to have lower densities than planets of similar sizes orbiting stars of different spectral types.
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey
Authors: Bhardwaj A. , Ripepi V. , Testa V. , Molinaro R. , Marconi M. , De Somma G. , Trentin E. , Musella I. , Storm J. , Sicignano T. , Catanzaro G.
Published: January 2024

Context. The highly debated effect of metallicity on the absolute magnitudes of classical Cepheid variables needs to be properly quantified for determining accurate and precise distances based on their Leavitt Law.

Aims. Our goal is to obtain homogeneous optical and near-infrared light curves of Milky Way Cepheid variables complementing their already collected high-resolution spectroscopic metallicities as part of the C-MetaLL survey. Together with Gaia parallaxes, we investigate period-luminosity-metallicity relations for Cepheid variables at multiple wavelengths.

Methods. We present homogeneous multiband (grizJHKs) time-series observations of 78 Cepheids including 49 fundamental mode variables and 29 first-overtone mode variables. These observations were collected simultaneously using the ROS2 and REMIR instruments at the Rapid Eye Mount telescope. Multiwavelength photometric data were used to investigate pulsation properties of Cepheid variables and derive their period–luminosity (PL) and period–Wesenheit (PW) relations.

Results. The Cepheid sample covers a large range of distances (0.5 − 19.7 kpc) with varying precision of parallaxes, and thus astrometry-based luminosity fits were used to derive PL and PW relations in optical Sloan (griz) and near-infrared (JHKs) filters. These empirically calibrated relations exhibit large scatter primarily due to larger uncertainties in parallaxes of distant Cepheids, but their slopes agree well with those previously determined in the literature. Using homogeneous high-resolution spectroscopic metallicities of 61 Cepheids covering −1.1 < [Fe/H] < 0.6 dex, we quantified the metallicity dependence of PL and PW relations which varies between −0.30 ± 0.11 (in Ks) and −0.55 ± 0.12 (in z) mag dex−1 in grizJHKs bands. However, the metallicity dependence in the residuals of the PL and PW relations is predominantly seen for metal-poor stars ([Fe/H] < −0.3 dex), which also have larger parallax uncertainties. The modest sample size precludes us from separating the contribution to the residuals due to parallax uncertainties, metallicity effects, and reddening errors. While this Cepheid sample is not optimal for calibrating the Leavitt law, upcoming photometric and spectroscopic datasets of the C-MetaLL survey will allow the accurate derivation of PL and PW relations in the Sloan and near-infrared bandpasses, which will be useful for the distance measurements in the era of the Vera C. Rubin Observatory’s Legacy Survey of Space and Time and upcoming extremely large telescopes.
Evaluation of User Experience on Learning Management System for Programming Course Through User Experience Questionnaire Method
Authors: Nur Hidayat Wahyu , Amalia Putri Tiara , Tahta Arsyillah Nazhiroh , Aslam Bahris Muhammad , Suswanto Hary , Hamdan Achmad
Published: January 2024

The transition from the pandemic period to normal again requires adaptation to habits, one of which is in learning, which was previously carried out online, now the learning model is offline again. Students are accustomed to using gadgets in their daily lives. Even in the current conditions, although the situation returns to its original state, adaptation is needed, one of which is in the learning model and making learning media to support teaching and learning activities. Therefore, in this study we propose the idea that the application of gamification in mobile learning using Case Based Learning is expected to make it easier for students to understand the material, increase students’ competitive spirit, and motivate students to learn. This research uses ADDIE which is an acronym for Analyze, Design, Develop, Implement, and Evaluate. The trial was carried out by material and media tests, small group tests, and field tests. Data analysis in this study used descriptive statistical tests and qualitative analysis. On the results of the UEQ questionnaire test, the Attractiveness scale obtained a score of 1.60, the Perspicuity scale obtained a score of 2.00, the Efficiency scale obtained a score of 1.61, the Dependability scale obtained a score of 1.00, the Stimulation scale obtained a score of 1.14, and the Novelty scale obtained score 0.90. Based on the results of the UEQ questionnaire testing, the design improvement solution obtained a positive score and showed improvement compared to the initial evaluation. The development of mobile learning apps is expected to be a source of mathematics learning materials that are practical in nature and can be used anytime and anywhere by students.
The power of plants to become sources of electrical energy
Authors: Suyarov K.T. , Abdulkhalikova N.R.
Published: January 2024

The relevance of this study is caused by the further need to develop alternative energy sources. The paper is the first to demonstrate the possibility of accumulating the electric current produced by plants by means of surfaces with high adsorption properties. The use of such currents to power diode lamps and other devices is shown. A literature review in this direction of research is also presented. Conclusions are made about the possibility of using the potential of photosynthesis in low-power energy.
Development of models and analysis of temperature fields of new energy-saving enclosing structures with an air layer
Authors: Zhangabay Nurlan
Published: January 2024

The author of the article propose new models of energy-saving envelope structures with air interlayers. To calculate the temperature fields in the enclosing structures they used the finite element modeling method in ANSYS environment. The authors analyzed the temperature fields at different variants of the outdoor temperature index. To calculate the temperature field in the envelope was used finite element model of the envelope, in which the influence of the ventilated air layer is replaced by the Convection type boundary condition with the temperature value. The result of the study is the analysis of temperature fields of new models of enclosures in different variants. So when analyzing the values of thermal resistance of traditional (scheme-1) and developed envelope structures (schemes 2-4) it was found that the thermal resistance of scheme-2 relative to the traditional scheme-1 value of thermal resistance at minimum temperature is 6.2 % higher. The authors also calculated by analogy the thermal resistance index at maximum temperature (4.5 %), at five days (5.8 %) and for the month of April (5.7 %). The analysis showed that scheme-2 is the most efficient of the new envelope schemes considered. In the comparative analysis of schemes - 3,4 with traditional scheme-1, the value of thermal resistance showed a negative effect. The authors determined that the temperature field is insignificantly different when using horizontal and vertical closed channels. The developed new energy-saving designs of external enclosure with air layer can be used in the design and construction of buildings, as well as in the teaching of relevant disciplines in universities.
Development of technology for obtaining asphalt concrete mixture using oil sludge as an additive
Authors: Satayeva Sapura , Nazarova Dauriya , Satybayeva Nurgul
Published: January 2024

Oil sludge is similar in composition to the composition of bitumen, which is one of the important components of asphalt concrete mixture. Therefore, oil waste can be used in the production of asphalt concrete, both as an organic binder to strengthen local soils and as a binder to produce organomineral mixtures. The use of oil sludge in road construction helps preserve natural resources, improve the environmental situation, and reduce the cost of building materials. In this work, physical and mechanical properties of asphalt concrete mixture of grade I type B were researched. To improve the performance characteristics of asphalt concrete oil sludge from oil company Zhaik Munay LLP (Uralsk) was used as an additive. Oil sludge was added to the asphalt concrete mixture in amounts of 5, 10 and 15%. When using 5% oil sludge, no significant changes in the properties of asphalt concrete are observed. An addition of 15% of oil went to the reduction of maximum efficiency during compression (0.03% by volume) and shear resistance by the efficiency of internal friction coefficient (0.01% by volume). The optimal amount is to use 10% oil sludge, at the same time, the compressive strength increases by 0.07% by volume, water resistance increases (0.02% by volume), water saturation decreases by 0.28% by volume, which has a positive effect on the quality of asphalt concrete. The properties of asphalt concrete before and after adding oil sludge were studied: compressive strength, water resistance, water saturation, shear resistance. It was concluded that it is advisable to use oil sludge as an additive. A technology for producing asphalt concrete mixture using oil sludge has been developed, which allows reducing its cost.
Experimental studies of the stress-strain state of cylindrical shells
Authors: Davlyatov Sh.M. , Nazirov A.S.
Published: January 2024

Research work carried out in world practice with the aim of ensuring stability, increasing strength and assessing the stress-strain state of shell structures requires the development of practical engineering methods for calculating optimal design solutions for modern cylindrical shell structures, into which various elements are built, taking into account increasing their strength, stability and deformation. In this case, the main emphasis is on increasing the strength and stability of metal cylindrical shells with ribs. In the construction practice of the republic, a wide range of measures is being implemented to introduce effective design and calculation methods to increase seismicity, stability and service life of special facilities used in the oil and gas industry and water supply. The strategy for further development of the Republic of Uzbekistan for 2017–2021 defines the main tasks aimed at “implementing targeted programs for the development and modernization of construction, road, transport and engineering …”. The implementation of this task is to improve practical and engineering calculation methods for solving assigned problems, including in order to ensure the stability and strength of cylindrical shells.
Synthesis of porous gas materials for a semiconductor carbon(ii) oxide sensor and their investigation
Authors: Sidikova Khulkar , Muminova Nargiza , Abdurakhmanov Ergashboy
Published: January 2024

In this article, the process and conditions for the synthesis of porous silica materials based on alkoxysilanes and metal oxides are studied. the main stages are discussed. A change in the pH value of a solution affects the relative rate of hydrolysis and condensation reactions of the solution, which makes it possible to obtain various structures from weakly branched silicate polymers to ordered, densely packed particles. The H2O/TEOS molar ratio (R) also has a significant effect on the structure of the synthesized silica materials. By changing R, silica materials can be obtained in the form of solid gels and colloidal particles. The composition and properties of the developed gas sensitive materials were studied by SEM, XRD and thermal analysis.
Design and design thinking role in a digital transformation
Authors: Cherepanov Vitalii , Popov Evgeny
Published: January 2024

This article embraces a design and design thinking role in a digital transformation based on an author’s concept of digital transformation of industrial enterprise. Design is usually considered as a process of making something attractive or convenient, but in this research it’s role is displayed in a management context of processes, those should be changed with digital transforming solutions. Authors of this research found out that design practice in a digital transformation becomes a core competency, that allows to gain real practical efficient changes, those couldn’t be reached only by digital transformation cases implementation. Authors also found out that design as managerial practice allows to shorten digital transformation roadmaps, which are usually constructed with the same “bricks” of proof-of-concept, MVP and final projects, those shape the way as an IT project, but not as a project of process change based on digital solutions. The new suggested approach makes the way of digital maturity development more efficient and allows to get better results in a digital transformation project.
Proportioning of steel fiber concrete tailored composition using the method of mathematical experiment planning
Authors: Kapustin F.L. , Pogorelov S.N. , Kolmogorova A.O.
Published: January 2024

Suggested proportioning of steel fiber concrete tailored composition can be made by using the method of mathematical experiment planning. A wide variety of types of fiber, the size and aggregate grain-size distribution, the number and characteristics of cement, and the need to obtain concrete mixes of different fluidity are used in the production of fiber reinforced materials. That is why it is impossible to develop a proportioning standard method. Thereby it is suggested to conduct an experiment of proportioning of steel fiber concrete tailored composition using the method of mathematical experiment planning in each specific case. The article provides an example of proportioning of steel fiber concrete on specific components. When planning the experiment, we selected water-cement ratio, cement consumption, fiber reinforcement content and the ratio of the content of coarse and fine aggregates as the independent factors. The compressive and tensile strengths of steel fiber concrete and the fluidity (stiffness) of the mixture were selected as responses. This article presents the possibility to make a choice of the ratio of the number of primary components for obtaining steel fiber concretes with the necessary characteristics by analyzing the obtained regression equations.
The development of the concept of the “ideal city” in Russian town planning of the 18th century
Authors: Bystrova T.J. , Mazaev G.V.
Published: January 2024

The concept of the ‘ideal city’ having centuries-long history is analyzed as a significant component of the history of Russian town planning. In the course of the comparative analysis with the notion ‘regular city’, the town planning understanding of the concept ‘ideal city’ is specified. According to the work of the architect with the city plan, three main types of Russian ‘ideal cities’ of the 18th century and four types of their centers are defined, depending on the terrain and its dissection. It is concluded that specific components dominated over the universal and typical ones in the Russian model of the ‘ideal city’.
Trends in spatial planning of cities
Authors: Maltseva Irina , Kolyasnikov Victor , Spiridonov Vladimir
Published: January 2024

The global trends of the modern development of urban planning activities are directly related to the theoretical and practical foundations of spatial planning of territories. In Russia today, the acute question is the interrelationships and contradictions of spatial and territorial views on the development of cities. There a lot of official discussions of the prospects for the implementation of such documents as a strategy or concept of spatial development in the professional research and scientific design community. The questions of master plan for the development of the territory, a comprehensive scheme for creating a comfortable environment are increasingly being raised also. The necessity and opportunity of replacing the master plan of the city with a spatial planning (or their symbiosis) is on the discussion at the federal level. The relevance of the research is determined by the need in the Russian theory and practice of urban planning to develop scientific and methodological foundations of spatial planning of urban development. The purpose of the work is to determine the types and role of spatial planning documents in the system of modern domestic urban planning activities.
Approaches to accounting for random events in the modeling of production processes of production and logistics systems of machine-building enterprises
Authors: Akimov A. , Nikishechkin P.
Published: January 2024

The paper considers approaches to the analysis and prediction of the state of production and logistics systems of machine-building enterprises. The main groups of random events that occur during the operation of production and logistics systems and can have a significant impact on the implementation of the production program are systematized. Simulation modeling systems are analyzed: AnyLogic, Plant Simulation, PlantTwin. The functional capabilities of simulation modeling systems for setting random events are considered. A comparison of simulation modeling systems is carried out by the method of setting the distribution of a random variable and by the possibilities of accounting for random events.
WiFi from past to today, consequences that can cause and measures of prevention from them, WiFi security protocols
Authors: Firdus E. , Aghababayev R. , Aliyev V. , Mustafayeva G. , Mayilov R. , Sardarova I. , Bakhshaliyeva S.
Published: January 2024

This article is dedicated to WiFi wireless networks. WiFi is a modern wireless technology. The article provides brief information about the history of their creation and development over the years and indicates features, areas of use, and main parameters. Steps taken to eliminate the possible consequences of these vulnerabilities were investigated. The main points to be considered during planning and the important issues to pay attention to while designing have been explained. WIFI security protocols, the history of their first creation, and the reasons for their creation have been investigated. As a result of the development of science and technology, the emergence and replacement of new protocols, their areas of use, and their shortcomings were mentioned. The article also discusses the strengths and weaknesses of the WEP, WPA, WPA2, and WPA3 series. At the same time, the article explains the possibilities of using the protocols and their special characteristics. The application of these protocols in practice has also been investigated. The main purpose of the article is to create a source of information for undergraduate and graduate students who want to get information about WIFI, its efficiency, benefits, and harms, as well as WIFI security protocols to ensure its security. At the same time, this article can serve as a short resource for students preparing for exams, courses, and research papers. Also, anyone who wants to learn about WiFi security protocols can use this article.
Human dimension of Open Science and the challenges of AI technologies
Authors: Zinchenko Viktor , Mielkov Yurii , Polishchuk Oleksandr , Derevinskyi Vasyl , Trynyak Maya , Iehupov Mykola , Salnikova Natalia
Published: January 2024

Open Science as a major enterprise to enable a citizen science and AI technologies that can provide for the vast amounts of information to be digested by each human persons are argued to be connected to each other by revealing the possibility of the personalization of knowledge and the human dimension of science. The development of the IT sphere is shown to be the history of its personalization, which presents the challenges for handling the present-day AI technologies so that they would augment human labourers, and not replace them.
Formation of methodological approaches to increasing the efficiency of optical networks
Authors: Al-Ababneh Hassan Ali , Shudaydat Eman Ahmad , Dalbouh Mahmud Agel Abu
Published: January 2024

In modern conditions of organizing the work of IT infrastructure, the issue of increasing the efficiency of the optical network is relevant and in demand. In this regard, to formalize methodological approaches and argue the theoretical prerequisites for increasing the efficiency of optical networks, an in-depth analysis of the main methods and directions was carried out. The advantages of using the method of transforming the architecture and topology of the network are argued. The main types of optical networks are stated: passive, hybrid, elastic, followed by highlighting key technologies and identifying promising options for increasing efficiency. Optimization opportunities highlighted operation of an optical network using PoF cable and super coherent technologies. Aspects of a software solution to improve the efficiency of an optical network are touched upon. The use of redundancy is justified as one of the promising methods to improve the efficiency of an optical network. Methodological approaches to increasing the efficiency of optical networks have been formed and can be applied in practice when organizing information architecture using the main results of the study.
Blind channel estimation in ZP-OFDM system using new precoding matrix over channels with memory
Authors: Al-Qadhi Osamah , Semenov Evgeny , Talib Jaber , Al-Barrak Saad , Al-Ghazali Maha
Published: January 2024

Using a new precoding matrix, a new method for blind channel estimation of OFDM systems with zero padding has been investigated. A single vector of the correlation matrix is employed to obtain the normalized estimated channel vector, and one pilot signal is used to resolve the scalar ambiguity. Two models of OFDM systems have been investigated, and their NMSE and BER results have been compared in various scenarios. In particular conditions, the new precoding matrix offers an advantage over the conventional circulant. To aid in the creation of novel precoding matrices, a proof of the full rank property is stated under some conditions.
To boundary value problems for a generalized hyperbolic equation with two fractional differentiation operators
Authors: Beshtokov Murat
Published: January 2024

Boundary value problems for a one-space-dimensional hyperbolic equation with two fractional differentiation operators and variable coefficients are considered. The method of finite differences is used for the approximate solution to the problems posed. Difference schemes for each of the problems are constructed, and by the method of energy inequalities for various relations between the orders of the fractional derivative (α, β) a priori estimates in differential and difference interpretations are obtained. The obtained estimates imply the uniqueness and stability of the solution with respect to the right-hand side and initial data, as well as the convergence of the solution of the difference problem to the solution of the original differential problem. Algorithms for the numerical solution of the problems posed are constructed.
Innovative method for determining the activity of gonadotropic raw materials in the production of the biological preparation of PMS
Authors: Yerkekulova Kaliya , Alibaev Nuradin , Alikhanov Oralbek , Beketauov Orinbek
Published: January 2024

The article presents the results of research work to determine the activity of gonadotropic raw materials in the production of the biological preparation of pregnant mare serum (PMS)from mares of the Kazakh breed of horses of the “Zhabe” type of the peasant farm “Sultanbai Ata” of the Turkestan region. An innovative method has been developed based on determining the follicle-stimulating hormone (FSH) content using ELISA, which provides optimal pregnancy periods for mares to obtain gonadotropic raw materials: 50, 60 and 70 days for mares-producersof 3-10 years of age in terms of FSH content. Existing technologies for determining the pregnancy of mares and assessing the activity of gonadotropic hormones in technical and moral aspects are outdated, since diagnostics require a lot of time and the use of laboratory white mice as biological tests is considered ineffective, labor-intensive processes, as well as inappropriate on ethical issues. An express test method has been developed for determining the activity of the gonadotropic hormone PMS in a given donor herd based on the content of the FSH level in the preparation, which makes it possible to subsequently determine the activity in mouse units, bypassing the traditional, labor-intensive, outdated method.
The role of nanocatalyst of pearl oyster shell in pack carburizing process on mechanical and physical properties of AISI 1020 steel
Authors: Rafi Muhammad , Puja I. Gusti Ketut , Rines Rines
Published: January 2024

The most commonly used metal material in the industry today is steel. Steel is classified based on its carbon content. There are high-carbon steel, medium-carbon steel, and low-carbon steel. The steel used in this research is low-carbon steel, namely AISI 1020 steel, with a carbon content of around 0.1% to 0.3%. With a low-carbon content, the hardness is also low. Pack carburizing is carried out to overcome this issue. The media used are coconut shell nanocarbon and pearl oyster shell nanocatalyst. Specimens were made with a mixture of nanocatalyst variations given around 0%, 10%, 20%, and 30% with the use of 900º C temperature with a holding time of 60 minutes. Preparation of nano-sized media using the High Energy Milling (HEM) process using a shaker mill machine. The treated specimens were then subjected to Vickers hardness testing with 5 kg and 200 gf loading, microstructure observation, and FTIR observation. The highest Vickers macro hardness test was obtained through the 20% nanocatalyst variation, resulting in a hardness value of 255 HV. The increase that occurred compared to without treatment increased by 91%. Then the micro Vickers hardness testing resulted in a value of 399 HV. The resulting microstructure is evenly distributed pearlite grains and gradations of ferrite grains. The carburizing depth is achieved optimally through a 20% variation of pearl clam shell nanocatalyst, with a depth of ± 0.19mm. Then FTIR observation also shows the presence of new groups of vinylidene-type alkene compounds. These compounds are flammable and volatile, so they can provide additional energy in the pack carburizing process.
Exploring the potential of GO-based composite hydrogels and their swelling property for controlled drug delivery
Authors: Ayucitra Aning , Ju Yi-Hsu
Published: January 2024

Swelling studies are essential for hydrogels with potential applications in biomedical areas, as the materials will be exposed to biological fluids. This study obtained composite hydrogels by physically cross-linked carboxymethyl cellulose (CMC) with GO. CMC is known to be non-toxic, non-allergenic, and possesses good biodegradability. To produce GO, a ‘greener’ modified Hummers’ method was first employed by removing the use of sodium nitrate in the oxidation process to avoid the generation of toxic NOx gases. Iron (III) chloride was then used as a cross-linker in composite preparation. The responses of GO-CMC hydrogel networks to various solvents and temperatures were studied by measuring their swelling property. The solvents included water, salt solution, ethanol, hexane, and phosphate buffer solutions with various pH (pH 2.1, 5.0, and 7.4). The effect of temperature on swelling was studied at temperatures of 25, 35, and 45oC. Results showed that the presence of GO within CMC matrixes altered the structures and properties whilst enhancing the swelling property compared to its native CMC hydrogel, at studied temperatures. It was also observed that the swelling property of GO-CMC composite hydrogels depended significantly on the pH of the environment, a great attribute for drug carriers with pH-sensitive behavior..
Analysis of coal facies and parting in The Balikpapan formation, Kutai Basin, East Kalimantan
Authors: Fauzan Roni , Listyani R.A.T. , Pambudi Setyo
Published: January 2024

The research area is located in RKBM coal mining area in East Kalimantan. One factor that influences the presence of parting in coal is the depositional environment. The existence of coal partings in this open pit area needs to be analyzed to determine the following steps in the exploration and further exploitation processes. The purpose of this study is a geological survey with the aim of knowing the coal facies and its parting characterization. The research was done by surface geological observation and drilling method. The results show that the facies association in this mining associated with delta systems such as channel, back swamp, flood plain, levee, crevasse splay, and inter distributary bay. The open pit area is composed of dominant lithology deposited in the upper delta plain environment. The presence of many and thin partings are often found in coal associated with the back swamp facies and deposited in the upper delta plain environment, which is mainly associated with fluvial systems. The distribution of parting in the study area is interpreted as not widespread because it is associated with back swamps that are affected by flood plains, and sometimes their distribution is cut off by channels.
Batik classification using KNN algorithm and GLCM features extraction
Authors: Wijaya David , Widiarti Anastasia Rita
Published: January 2024

Batik is one of the Indonesian cultures that has been recognized by UNESCO as an intellectual right of Indonesia. The popularity of batik internationally raises concerns about the Indonesian people’s understanding of batik if Indonesian people only refer to all types of batik just as ‘batik’. By utilizing K-Nearest Neighbour (KNN) algorithm which is a simple classification algorithm, then a system can be created that can classify batik types. The first step of KNN is training, which stores each training pattern. The second step is classification, whenever classifying a pattern, KNN examine all training patterns to determine the K closest patterns using certain calculations such as Euclidean Distance and Manhattan Distance. Before classification, a characteristic that represents a pattern is needed. Gray-Level Co-Occurrence Matrix (GLCM) is an algorithm that has proven to be very powerful as a feature descriptor in representing the texture characteristic of an image. This research experiments with the value of K in KNN = 1, 3, 5, and 7 with the distance calculation using Euclidean and Manhattan. The GLCM characteristic used are Entropy, Energy, Contrast, Homogeneity, Dissimilarity, Correlation, ASM, and the average of each characteristic. From the research that has been done, the system created obtained the highest accuracy of 75% with the combination of parameters; pixel distance = 7, K value = 1, 1st fold as test data and 2nd and 3rd fold as training data, and by using StandardScaler. But despite getting decent accuracy, there is still a need for further research to improve the accuracy of batik classification.
A study of stochastic epidemic model driven by liouville fractional brownian motion coupled with seasonal air pollution
Authors: Suryawan Herry Pribawanto
Published: January 2024

Air pollution can cause and provoke respiratory diseases. It is an important topic to the public, particularly in developing countries. Since there are many uncertain factors in the environment, stochastic differential equation model is a powerful tool to study the changes of air pollution and the transmission of infectious diseases. The removal of air pollutants as well as the transmission of diseases can be influenced by random perturbations with memories. In this research, we develop a mathematical model in the form of a system of stochastic differential equations driven by fractional Brownian motion of Liouville-type, coupled with seasonal air pollution, to study the dynamics of infectious respiratory disease spread. As a result , by using stochastic calculus techniques, we derive the equation for the level of air pollution.
Aerial object detection analysis: Challenges and preliminary results
Authors: Polina Agnes Maria , Suparwito Hari , Kumalasanti Rosalia Arum
Published: January 2024

Computer vision allows computers to retrieve information from images, videos, and other visual inputs. Unmanned Aerial Vehicle (UAV) technology is also used to assist computer vision in collecting image data from the air. This paper aims to perform tree object detection using UAVs by capturing images perpendicularly from above the object. Image data was collected from around Sleman Yogyakarta using DJI Pro 3 from 5 to 12 July 2023. A total of 162 images were used as a dataset. The YOLOv8n model was implemented to 162 images as the training and validation data. Next, 12 other images were used as testing data. The results showed that YOLOv8n could detect trees well from above. The confidence value of the testing dataset with the appropriate image capture is more than 80%. As a deep learning algorithm for object detection, the YOLO model can perform object detection quickly and accurately. The subsequent research will focus on analyzing the implementation of object detection using the YOLO algorithm to measure open green areas.
An overview of wind energy to optimize initial potential in Java
Authors: Megawati Ade Yurika Isti , Haryani Fairusy Fitria , Sukarmin  , Sarwanto  , Wahyuningsih Daru , Pujayanto  , Supurwoko
Published: January 2024

The amount of energy derived from fossil fuels has been dwindling rapidly while its consumption has gradually increased. Indonesia, especially Java and East Nusa Tenggara islands, has excellent potential for developing renewable energy and an environmentally friendly economy. One of the more comprehensive energy resources is wind, which can provide renewable resources because it is renewable, widespread, and abundant. Wind energy can be used as an alternative energy material instead of fossil fuels in power generation systems. This article explores the potential of wind energy as a renewable energy source in Java through a literature study. Data was collected by collecting references from nationally and internationally reputable indexed books and journals related to the topic and government website platforms, reports and other relevant sources. The results showed that wind energy in several areas of Java Island has the potential to become renewable energy for power generation. The benefits of renewable energy can outweigh the drawbacks.
Subcutaneous and Visceral Fat: Relation with Brown Adipose Tissue
Activation in Women
Authors: Da Rosa Samir Ezequiel , Neves Eduardo Borba , Martinez Eduardo Camilo , Marson Runer Augusto , Reis Victor Machado
Published: January 2024

Brown adipose tissue (BAT) helps control body weight and is inversely correlated
with body fat, but it is unclear whether it is subcutaneous adipose tissue (SAT)
or visceral adipose tissue (VAT) that is related to BAT activation. The
presented study aimed to verify the relation of SAT and VAT on BAT activation
through infrared thermography (IRT) and cold stimulation in adult women. Forty
women were evaluated in body composition and skin temperature (Tskin)
acquisition by IRT. Student’s independent t-test, Pearson’s
correlation, and two-way repeated measures ANOVA with Tukey post-hoc were
applied. Women with low amounts of SAT and VAT had a significant increase in
supraclavicular Tskin (SCVT). Medium negative degrees of linear variation were
found before and after cold stimulation between SCVT, SAT and VAT. A significant
effect of the moment factor and the group factor on the SCVT between subjects
divided into the groups were pointed out. No difference was found in the
relation between SAT, VAT, and BAT in adult women, pointing out that both types
of fat are equally related. These results can help clinical practice understand
clearly, through IRT, that the high accumulation of SAT and VAT can impair the
activation of BAT and hinder the loss of weight in women.
Validation of Echocardiographic Measurements in Patients with Pulmonary Embolism in the RIETE Registry
Authors: Lyhne Mads Dam , Bikdeli Behnood , Dudzinski David M. , Muriel-García Alfonso , Kabrhel Christopher , Sancho-Bueso Teresa , Pérez-David Esther , Lobo José Luis , Alonso-Gómez Ángel , Jiménez David , Monreal Manuel ,   the RIETE Investigators
Published: January 2024

Background In acute pulmonary embolism (PE), echocardiographic identification of right ventricular (RV) dysfunction will inform prognostication and clinical decision-making. Registro Informatizado Enfermedad TromboEmbolica (RIETE) is the world's largest registry of patients with objectively confirmed PE. The reliability of site-reported RV echocardiographic measurements is unknown. We aimed to validate site-reported key RV echocardiographic measurements in the RIETE registry.

Methods Fifty-one randomly chosen patients in RIETE who had transthoracic echocardiogram (TTE) performed for acute PE were included. TTEs were de-identified and analyzed by a core laboratory of two independent observers blinded to site-reported data. To investigate reliability, intraclass correlation coefficients (ICCs) and Bland–Altman plots between the two observers, and between an average of the two observers and the RIETE site-reported data were obtained.

Results Core laboratory interobserver variations were very limited with correlation coefficients >0.8 for all TTE parameters. Agreement was substantial between core laboratory observers and site-reported data for key parameters including tricuspid annular plane systolic excursion (ICC 0.728; 95% confidence interval [CI], 0.594–0.862) and pulmonary arterial systolic pressure (ICC 0.726; 95% CI, 0.601–0.852). Agreement on right-to-left ventricular diameter ratio (ICC 0.739; 95% CI, 0.443–1.000) was validated, although missing data limited the precision of the estimates. Bland–Altman plots showed differences close to zero.

Conclusion We showed substantial reliability of key RV site-reported measurements in the RIETE registry. Ascertaining the validity of such data adds confidence and reliability for subsequent investigations.
Designing for possibility in public space: affordance, assemblage, and ANT
Authors: Stevens Quentin , Daly Jonathan , Dovey Kim
Published: January 2024

The design of urban public space is inherently problematic because the range of its possible uses and meanings is broad and unpredictable. This paper engages this problematic through the lens of Gibson’s theory of ‘affordances’—the ways the material world affords for human desires. We first explore some conceptual and methodological problems of the theory of affordances and its application in understanding and designing public space. These dimensions of affordance theory are then reconceived using the relational thinking of assemblage and actor-network theory (ANT). A key contribution of the paper is an expanded typology of affordances which includes improvised and serendipitous affordances that extend beyond the intentions of designers and users. This opens new ways of thinking about the design of urban public space as a space of possibility where outcomes are open, multiple, and unpredictable. The paper suggests how urban spaces can be shaped to better support rich cultural diversity and social inclusion.
Photoinduced growth of the crystalline phase of tellurium on a 1T′-MoTe2 matrix
Authors: Sciammarella Paulo Victor , Almeida de Souza Matheus , de Moura Guimarães Luciano , Nogueira da Silva Maria Ivonete , González Pérez Juan Carlos , Gutierrez Rizzi Leandro , Duarte Araujo Eduardo Nery
Published: January 2024

Due to the growing demand for miniaturization and energy efficiency in modern electronic devices, there is a renewed interest for optoelectronic memories and sensors based on 2D materials. In particular, the molybdenum ditelluride (MoTe2) is one of the most promising materials for applications in nonvolatile phase-change memory devices, as its properties can be controlled by visible-light illumination. Among the several ways to synthesize MoTe2, the molybdenum oxide tellurization through isothermal close space sublimation (CSS) annealing in gas atmosphere is a simple and low-cost effective method for large-scale production of devices based on this layered material. Therefore, the understanding of the physical properties of MoTe2 thin films produced by this technique is crucial for future applications. Surprisingly, our results indicate that there is a photoinduced growth of the crystalline phase of tellurium on the 1T′-MoTe2 matrix even when the power density of the laser is low. From Raman spectroscopy investigations, we were able to show that nanometer-sized tellurium crystallites work as seed sites for the photocrystallization of tellurium. By assuming that the overall crystallization process is described by a kinetic approach that is based on the Kolmogorov–Johnson–Mehl–Avrami theory, our results indicate that the process is governed by an anisotropic organization of the tellurium atoms in helical structures during the crystal growth.
An equivalent circuit approach for remnant thickness evaluation and flaw sizing using pulsed thermography
Authors: Sharma Govind K. , Mahadevan S , Kumar Anish
Published: January 2024

Active thermography using pulsed heating is a fast and reliable method for detecting flaws in composite and metallic materials. This paper analyzes the temperature decay that occurs immediately after flash heating the front surface of stainless steel specimens as a function of time, based on a novel application of the equivalent circuit approach (ECA). The temperature decay from the front surface is equated to the discharge of a capacitor. The ECA is based on the charging (temperature rise due to flash heating) of a capacitor, followed by its discharge (temperature decay) through a series of resistors (which depends on the conductivity of the material) and capacitance (which depends on the thermal capacitance of the layers) through which the heat is dissipated. The proposed approach analyzes the sequences of temperature data obtained at each pixel location during cooling from a step wedge and a specimen with multiple flat-bottom holes. Time constant maps derived from the analysis are used to ascertain the thickness of the step wedge, detect the flaws, and evaluate the remnant thickness of the flaws. A correlation has been established between the thickness and the time constants. The above approach has been used to estimate the diameter of the flat-bottom holes.
Learning of discrete models of variational PDEs from data
Authors: Offen Christian , Ober-Blöbaum Sina
Published: January 2024

We show how to learn discrete field theories from observational data of fields on a space–time lattice. For this, we train a neural network model of a discrete Lagrangian density such that the discrete Euler–Lagrange equations are consistent with the given training data. We, thus, obtain a structure-preserving machine learning architecture. Lagrangian densities are not uniquely defined by the solutions of a field theory. We introduce a technique to derive regularizers for the training process which optimize numerical regularity of the discrete field theory. Minimization of the regularizers guarantees that close to the training data the discrete field theory behaves robust and efficient when used in numerical simulations. Further, we show how to identify structurally simple solutions of the underlying continuous field theory such as traveling waves. This is possible even when traveling waves are not present in the training data. This is compared to data-driven model order reduction based approaches, which struggle to identify suitable latent spaces containing structurally simple solutions when these are not present in the training data. Ideas are demonstrated on examples based on the wave equation and the Schrödinger equation.
High-suppression-ratio and wide bandwidth four-stage Purcell filter for multiplexed superconducting qubit readout
Authors: Zhou Yibiao , Cai Xiao , Zheng Yuzhen , Zhou Boyi , Wang Yu , Xiong Kanglin , Feng Jiagui
Published: January 2024

Purcell filters, which serve to suppress electromagnetic radiation and enhance the readout efficiency of qubit, are an indispensable component in superconducting quantum chips. With the increasing scale of quantum chips, the requirements for the performance and scalability of Purcell filters are becoming more stringent. In this report, a novel four-stage Purcell filter that enables fast measurement without exacerbating environmental damping of the qubits is presented. The design approach of the filter is derived from the serial and parallel configurations of λ/4 resonant cavities. The filter exhibits exceptional passband-to-stopband isolation, reaching up to 40 dB of isolation within the transition range of 400 MHz. Furthermore, the filter boasts a wide bandwidth for both the stopband and the passband, with the stopband ranging from 4 to 5.5 GHz and the passband extending from 5.8 to 6.5 GHz. In terms of spatial arrangement, each filter can be connected to over ten readout resonators for qubit readout. This innovative Purcell filter will significantly contribute to the development of high quality, scalable superconducting quantum chips.