bluuebunny/crossref_metadata_2025 huggingface dataset:
Аnalysis of methods for calculating the penetrating effect of the main types of missiles and fragmentation damage to the structures of protective constructions
Authors: Mykhailovskyi Denys , Skliarov Ihor , Khomik Mykola , Vavilova Nadiia , Skliarova Tetiana
Published: January 2025

Relevance. The full-scale invasion of Ukraine by Russia raised a number of questions, including those related to the construction of defensive and fortification structures. It turned out that this direction in our country was practically undeveloped. There is a lack of regulatory framework for accounting for many specific factors, such as blast waves, penetration of projectiles and fragments. It is worth noting separately that means of attack are constantly evolving and improving, while the scientific approach to countering them has almost stagnated worldwide. This article is dedicated to reviewing existing methodologies that can be applied in calculating elements of construction for fragment penetration. Choosing the right methodology for calculations will help develop a methodical approach to designing fortifications and structures for the engineering protection of critical infrastructure objects, which is currently a very important and relevant task. This approach could eventually be included in specialized regulatory documents for calculating and designing defensive and fortification structures, significantly improving their quality and reliability considering modern wartime threats.. The aim of this work is to review of existing methods of engineering and analytical calculations of penetration of protective barriers by the main elements of damage from enemy attack means. The importance of choosing the right calculation methodology for different types of threats and materials of protective obstacles is a very important task for the proper design of fortifications and protective structures. Results. The paper considers the existing world methods of penetrating effects of various kinds of destructive elements (missile warheads, shells, bullets, fragments). The question of the need to develop a clear engineering methodology for calculating the penetrating effect of all possible destructive elements in obstacles of various materials is raised. The algorithms for calculating fragmentation damage from various types of ammunition, as well as for calculating the protective properties of fortifications and engineering defenses are presented.
Some features of nonlinear calculation in the building design system
Authors: Perelmuter Anatolii
Published: January 2025

Abstract. The work is devoted to the analysis of discrepancies between linear and non-linear calculation of building structures that deform under the influence of load. It is recalled that there are two fundamentally different procedures inherent in the design calculation, namely:
(i) static or dynamic analysis of the behavior of the mechanical system, the result of which are the parameters of the stress-strain state of the system and (ii) assessment of the possible resistance of the system elements and the structure in general.
It is shown that when using linear analysis, these procedures set the content of independent calculation stages, while when using nonlinear analysis, they are combined and mutually influence each other.
Attention is drawn to features inherent only to the non-linear version of the analysis, for example, such as:
- the impossibility of using rod finite elements without crushing the length of the rod into elementary sections;
- the occurrence of tension-compression stress during bending, as a result of asymmetric development of plastic deformations along the cross-section height;
- the possibility of realizing extreme responses of the system at intermediate (not extreme) values of load intensity.
The problem of determining the limit state of the system, which corresponds to the global assessment of the carrying capacity, is considered. Taking into account the computational difficulties of numerical analysis when the system approaches the state of the mechanism, it is proposed to accept the state in which the resistance of the system decreases by several orders of magnitude compared to the beginning of the load. Attention is also drawn to cases where the limit state is determined by the level of deformation of the system.
A description of the main features of the global safety format is given, and a description of the latest known proposals for global reliability assessment and information on the implementation of these proposals in the new edition of the European Design Standards is provided.
Free vibrations of layered anisotropic thick-walled cylindrical shells
Authors: Trach Volodymyr , Podvornyi Andrii , Zhukova Nataliia , Bondarskyi Oleksandr
Published: January 2025

The article presents an approach to the calculation of free oscillations of thick-walled elastic layered anisotropic cylindrical shells. Anisotropy is due to the use of material whose elastic characteristics are in one plane parallel to the middle surface of the shell. This type of anisotropy arises due to the non-coincidence of the main directions of elasticity of the orthotropic fibrous composite with the axes of the cylindrical coordinate system.
Calculations describing the free oscillations of thick-walled cylindrical anisotropic shells are implemented by deriving a system of six differential equations of motion in partial derivatives of the spatial linear theory of elasticity. For this purpose, the authors modified the Hu-Washizu variational principle accordingly, which allows writing not only the equations of motion, but also the boundary conditions corresponding to them. When using the Bubnov-Galyorkin analytical method, an infinite one-dimensional system of differential equations of the normal Cauchy form is obtained, which allows finding the frequencies of free oscillations of thick-walled layered anisotropic cylindrical shells. The unknowns in the system of equations of motion describing the parameters of the stress-strain state of the shells are selected in the radial direction. To implement a one-dimensional solving system of differential equations of cylindrical shells, the numerical method of discrete orthogonalization was used, which was adapted accordingly by the authors. On this basis, an algorithm was written and a software complex was created for personal computers, which allows solving problems related to setting parameters of free oscillations of thick-walled layered anisotropic composite cylindrical shells.
The solutions of problems on the influence on the frequencies of free oscillations of an anisotropic thick-walled cylindrical shell are presented, taking into account: the angle of rotation of the main directions of elasticity of an orthotropic fibrous composite; increasing the number of cross-stacked layers; changes in the geometric parameters of the structure; four types of boundary conditions.
One of the approaches to assessing the stability of the soil massif within the grid methods
Authors: Solodei Ivan , Pavlenko Vasyl , Kulikov Oleksandr
Published: January 2025

An important stage for creating the possibility of using landslide and landslide-prone territories in economic activity is the assessment of their stability. To solve this difficult task, a significant number of various methods have been developed, each of which has its own advantages and disadvantages. In this work, a method for assessing the stability of slopes within the framework of grid methods is proposed. This method is implemented in a complex with the finite element method, which allows to estimate the stress-strain state and to determine of the stability coefficient and localize the slip surface using grid methods.
The algorithm for using grid methods for this type of problem is given in detail in the paper. Its essence consists of three key stages, the first using the finite element method to determine the acting stresses in the slope. The second is the creation of a grid based on a finite-element model, which makes it quite easy to switch to a grid graph convenient for analysis. The third is the use of algorithms for analyzing graphs and processing the results. At the same time, one of the most important stages for the efficiency of the algorithms for finding the shortest path is the selection of the weight function of the edges of the graph, an example of the use of acting stresses is given in this work.
Also, the work highlights the results of solving several test problems to evaluate their convergence between the proposed and other widespread methods for assessing the stability of slopes. Calculations were carried out with Plaxis 2D PC and Ukis PC, and LIRA-SAPR PC was used to estimate the stress-strain state for the proposed method. The proposed method showed sufficiently high convergence of results with other methods.
Influence of mass on the efficiency and dynamics of single-sided and double-sided vibro-impact nonlinear energy sinks
Authors: Lizunov Petro , Pogorelova Olha , Postnikova Tetiana , Gerashchenko Oleh
Published: January 2025

This paper studies the efficiency of the asymmetric single-side and symmetric double-sided vibro-impact nonlinear energy sinks (SSVI NES and DSVI NES), that is, vibro-impact dampers, in mitigating unwanted vibrations of the heavy primary structure (PS) to which these dampers are attached. The dynamic behavior of this vibro-impact system is also investigated. The damper efficiency and system behavior are studied for dampers with four different masses, as optimization is carried out for other damper parameters at a predetermined mass. The effect of the damper mass changing on its efficiency and system dynamic behavior is shown. The dampers with different masses and optimal design exhibit similar high efficiency in mitigating the PS vibrations, but the optimal design of the dampers with lower mass has unusual parameters, namely the huge clearance and small damping coefficient.  The SSVI NES hits not only the obstacle hardwired to the PS but also the PS directly. From this point of view, it can be considered as double-sided DSVI NES only asymmetric. The DSVI NES hits the left and right obstacles rigidly connected with PS. The regions of bilateral impacts are narrow and located near the resonant frequency of the exciting force. In the rest of the frequency range, the SSVI NES makes unilateral direct impacts on the PS; the DSVI NES performs shockless motion without any impacts and operates in this frequency range as a linear damper without any nonlinearity.   
The numerous numerical tests were able to show the system dynamics with 36 different dampers, namely for four masses, for two damper types for each mass, and for several variants of the optimal damper design. The optimal design is not unique; it can have many variants, since there is a lot of damper parameter sets that provide similar mitigation of the main structure vibrations. Therefore, optimization procedure itself does not and cannot give an unambiguous result, allows for great arbitrariness in its execution and requires great experience and skill from the performer.
Research of the interconnections of the "structure - technology - mechanized equipment" system in the construction of frame buildings
Authors: Rashkivskyi Volodymyr , Ignatenko Oleksandr , Demianenko Roman , Kozak Andrii , Dubovyk Iryna , Zaiets Yurii
Published: January 2025

The article was developed and implemented for calculation models of the frame building and the lifting module bu using computing complex Autodesk Inventor. The dimensions and number of models elements allow to correctly investigate the technical structure. The basic scheme of connections in determining the structural scheme of the building, the method of its construction, and technical means of implementation is considered. Actuality of this work is the need for qualitative analysis of interrelated solutions in construction when using new construction technologies and modernization of mechanized support for their implementation.
Modern approaches to the formation of the structure of the building frame are analyzed. The main propouse is based on using of lifting assembly modules to reduce the specific share of the use of heavy crane equipment at the construction site.
Approaches to the formation of a system for monitoring the construction process, in particular the installation of the covering, were also considered.
Based on the results of the research, technical solutions are proposed to support the process of installing the building covering, which take into account the structural features of the building and are formed taking into account the functional features of the construction technological process.
The investigation of progressive collapse of steel structures considering physical nonlinearity
Authors: Vabishchevich Maksym , Nestor Nataliia , Fesun Ihor , Burkivskyi Mykhailo
Published: January 2025

The article comprehensively analyzes the problems of research into the phenomenon of progressive collapse, defines the current stage of research, identifies key issues during the simulation of sudden removal of structures, gives the results of the study of sudden collapse of steel structures without taking into account and taking into account physical nonlinearity.
A number of factors have been identified for the revival of interest in the topic of progressive collapse research, which began at the beginning of the new millennium and continues to this day. This includes the occurrence of world-famous cases of progressive collapse, a huge number of destroyed buildings and structures as a result of the full-scale invasion of the Russian Federation into Ukraine, a significant number of buildings and structures that, according to obvious signs, should have been completely destroyed due to the destruction of certain key load-bearing structures, but remained partially damaged, a low-income state regulatory framework regarding stability in the event of progressive collapse of buildings and structures, the emergence of technological possibilities for performing spatial calculations, etc.
An approximate list of factors has been defined, the consideration of which at the stage of numerical modeling of the emergency situation of a progressive collapse can increase the stability and reserve of the load-bearing capacity of structures. The current regulatory requirements for taking into account the physical nonlinearity of steel structures are analyzed. In addition, the parameters of physical nonlinearity modeling were evaluated, namely the selection of the "stress-strain" diagram, the selection of the deformation limit, etc.
Quasi-static and dynamic methods of modeling sudden collapse are compared, and the implementation algorithm of both methods is briefly analyzed. The scenarios according to which the simulation of the sudden collapse process took place are described.
Multi-criteria parametric optimization of the strength and weight of a shell of a minimum surface on a square contour under thermal and power loading, taking into account geometric nonlinearity
Authors: Ivanchenko Grigory , Koshevyi Oleksandr
Published: January 2025

In applied and structural mechanics, many examples of optimal design with different objective functions are considered, but there is a need to take research in this area to a new level. The object under study with two or three simultaneous types of optimization is an actual applied problem in the field of construction and applied mechanics.
One of the main tasks of designing minimal surfaces is to find the optimal shell shapes for given overall dimensions and shape in plan, taking into account parametric optimization - it is necessary to implement a modern optimization algorithm in the calculation of this structure. Its solution should be brought to ready-made formulas, graphs, tables, calculation examples and practical.
The system of solving equations of the finite element method is formed using the Lagrange's variational principle, according to which the total potential energy P of a finite element model of a body is in a state of stability and equilibrium has a minimum value.
Within the framework of the study, a methodology for obtaining the ratio of the finite element method with regard to geometric nonlinearity is presented that does not depend on the shape and properties of the finite elements, so it can be implemented for a plate finite element of a shell of minimal surface.
To study the multicriteria parametric optimization of the minimum surface shell with regard to geometric nonlinearity, a special additional optimizer module created by the authors is used, which is linked to the Femap with Nastran calculation complex [12]. The computational model is built by the finite element method, which makes it possible to perform a qualitative study of optimization taking into account the objective functions: Mises stress and structural weight.
This methodology proves to be effective in the study of multi-criteria parametric optimization with consideration of geometric nonlinearity. Such an approach to the calculation of building structures makes it possible to use structural materials efficiently, and modern calculation complexes based on the finite element method (FEM) can be used in further development at the level of building codes of Ukraine.
Risk factors for a poor distant outcome in patients with myocardial infarction depending on a history of COVID-19
Authors:   Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Kashtalap V.V. ,   Kemerovo State Medical University, Kemerovo, Sadovnikov A.V. ,   L.S. Barbarash Kuzbass Clinical Cardiological Dispensary, Kemerovo, Sadovnikova N.V. ,   Kemerovo State Medical University, Kemerovo, Gofman L.S. ,   S.V. Belyaev Kemerovo Regional Clinical Hospitai, Kemerovo, Bazdyrev E.D. ,   Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo
Published: January 2025

Aim: to identify predictors of a poor distant outcome in patients with myocardial infarction (MI) depending on a history of COVID-19.
Patients and Methods: a single-center registry comparative study was conducted. 591 patients with verified MI diagnosis were included in the
analysis of a hospital phase of the registry, and two groups were formed: 478 (80.9%) patients with isolated MI withoutCOVID-19 and 113 ones
(19.1%) with MI and concomitant COVID-19. Within 12 months after a hospital discharge, fatality rate (total mortality rate) was retrospectively
evaluated in both groups. The statistical analysis was performed to find informative predictors of fatal MI risk depending on a history ofCOVID-19.
Results: initially, MI patients with concomitant diagnosed COVID-19 were characterized by higher frequency of previously performed
revascularization procedures and a higher number of bleeding events. Within the 12-month follow-up, the total mortality rate in MI patients
without COVID-19 was significantly lower (2.2%) than in those with MI and COVID-19 (7.4%, р=0.010).
Conclusion: the mortality rate was significantly higher (p=0.010) in patients with MI and COVID-19. In addition to the recurrent course of
myocardial infarction, a history of diabetes mellitus increases an all-cause death risk in patients with myocardial infarction and COVID-19
within 12 months. Therefore, diabetes mellitus course should be managed more efficiently in this cohort of patients. Age and low left ventricular
ejection fraction were significant factors for the all-cause death risk in patients with isolated myocardial infarction within 12 months.
Keywords: myocardial infarction, COVID-19, risk factors, long-term prognosis, predictors, diabetes mellitus, heart failurе.
For citation: Kashtalap V.V., Sadovnikov A.V., Sadovnikova N.V., Gofman L.S., Bazdyrev E.D. Risk factors for a poor distant outcome in patients with
myocardial infarction depending on a history of COVID-19. RMJ. 2024;9:2–6. DOI: 10.32364/2225-2282-2024-9-1
New aspects of the management of patients with chronic coronary syndromes (2024 ESC Clinical Practice Guidelines: Summary)
Authors:   Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Sedykh D.Yu. , Kashtalap V.V. ,   Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo
Published: January 2025

The paper presents updated aspects of chronic coronary syndrome (CCS) management according to the new 2024 European Society of
Cardiology (ESC) Clinical Practice Guidelines and considers the applicability of the diagnostic algorithm and selection of effective treatment
in "real-life" clinical practice in Russia. A clinical example shows that patients with chest pain and/or shortness of breath combined with
cardiovascular risk factors should be actively considered for the detection of CCS and obstructive coronary atherosclerosis using the proposed
systems of clinical assessment of pre–test probability, as well as adequate laboratory and instrumental methods (including non-invasive
and invasive testings, imaging techniques) should be applied according to current clinical recommendations, In case of typical angina
manifestations associated with several risk factors, it is possible to initiate therapy to improve the patient’s prognosis (antithrombotic, lipid-
lowering, antihypertensive drugs) and one to improve the quality of life (antianginal drugs) even during a preliminary CCS diagnosis. When
obstructive coronary artery disease is detected, patients with persistent clinical presentation of myocardial ischemia despite the therapy need
to be referred for myocardial revascularization; non-obstructive CCS requires invasive diagnostic methods with endotype assessment. The
presented clinical example emphasizes an important role of gastrosoluble acetylsalicylic acid in antiplatelet therapy for CCS (coronary heart
disease in Russia).
Keywords: chronic coronary syndrome, coronary heart disease, clinical practice guidelines, antiplatelet therapy, acetylsalicylic acid.
For citation: Sedykh D.Yu., Kashtalap V.V. New aspects of the management of patients with chronic coronary syndromes (2024 ESC Clinical
Practice Guidelines: Summary). RMJ. 2024;9:20–27. DOI: 10.32364/2225-2282-2024-9-4
Successful drug therapy of chronic heart failure in a patient with complex cardiomyopathy and type 2 diabetes mellitus
Authors:   Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Karetnikova V.N. ,   Kemerovo State Medical University, Kemerovo, Neyeshpapa A.G. ,   Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo
Published: January 2025

Chronic heart failure is an outcome of various cardiac diseases (including ischemic heart disease and hypertension), especially in the absence
of adequate therapy for the underlying disease. Type 2 diabetes mellitus not only exacerbates the course of existing heart failure, but also
contributes to its development. Patients with a combination of the above mentioned conditions need comprehensive treatment to compensate
all the pathological links of diseases with mutual aggravation. Advanced complex therapy for heart failure can significantly improve the
subjective and objective status, as well as prognosis of patients. This was clearly evidenced by a clinical case of an initially co-morbid patient
with low adherence to the therapy.
Keywords: ischemic heart disease, hypertension, chronic heart failure, type 2 diabetes mellitus, co-morbid patient.
For citation: Karetnikova V.N., Neyeshpapa A.G. Successful drug therapy of chronic heart failure in a patient with complex cardiomyopathy
and type 2 diabetes mellitus. RMJ. 2024;9:34–39. DOI: 10.32364/2225-2282-2024-9-6
Lindblad Operator Computation for a Single-Mode Quantum Field in a Cylindrical Fibre Based on the Boltzmann Equation to Account for Random Scattering by the Phonon Lattice
Authors: Parthasarathy Harish , Srivastava Anand , Garg Parul , Kumar Dushyant , Pandey Nidarshana
Published: January 2025

The first and second order Boltzmann kinetic transport equations, taking into account external and internal electromagnetic interactions of the charged phonon lattice, are set up. The incident classical field component interacts with the phonon lattice and gets scattered randomly owing to the random motion of the phonons. The incident quantum field component thus interacts with both the incident classical field and the scattered classical field, thereby generating respectively non-random and random Hamiltonian perturbations to the total quantum field Hamiltonian. By using a second order Taylor expansion of the mixed state Schrödinger evolution of the quantum field, taking into account these nonrandom and random perturbations, and then forming statistical averages for the random component using the first and second order Boltzmann distributions of the particles in phase space, we are able to calculate the Lindblad operator term corresponding to the random component. We then demonstrate how to cancel out these nonrandom and Lindblad perturbations to the mixed state dynamics using counterterms, based on a Monte Carlo method involving generating a sequence of iid random Hamiltonian operators, applying Schrödinger evolution, and then forming ensemble averages making use of the strong law of large numbers.
It’s Either a Struggle or It’s Fear
Authors: Belaj Melanija
Published: January 2025

This paper is a reflection on the co-author’s involvement in the creation of the exhibition Faces of Hunger – in shaping the very idea of the exhibition,1 research, its planning and implementation, processing of the collected material, selection of topics to be presented, in what way and why, and consequently on the perception of the exhibition, the curatorial experience of leading through the exhibition and the “life” of the exhibition itself after the primary installation. I base my reflective experience on the reflection on the idea of “difficult topics” in museum practice, as well as on the insights of the so-called affective turn in museums in recent decades. I pay special attention to certain elements in the exhibition, as well as to the experience of a non-museologist who, within the framework of the ethnological, i.e. cultural-anthropological profession, is born out of the scientific habitus, one who primarily writes about the conducted research, and does not visualise, in this case specifically the lack of food, i.e. hunger in the world.
Pjat za polizat’
Authors: Ivanišević Jelena
Published: January 2025

Pjat za polizat’ predstavlja rezultate istraživanja prehrane u dječjim vrtićima na otoku Hvaru u proljeće 2019. godine. Ovim su se istraživanjem prvenstveno željele propitati logika i logistika organizirane dječje prehrane, ali i razina dječje prehrambene pismenosti. U pomanjkanju obrazovnih ili sličnih dugoročnih programa usmjerenih prema lokalnoj zajednici, taj je projekt zamišljen (dijelom) kao akcijsko istraživanje, svojevrstan pilot-projekt usmjeren podizanju svijesti o temeljnim vrijednostima mediteranske prehrane u okviru predškolskog odgoja i obrazovanja, a posljedično i u lokalnoj zajednici.
Doprinos Udruge Ekomuzej Bistra bilježenju i popularizaciji usmene književnosti u 21. stoljeću
Authors: Malek Lina , Domitrović Miličić Dolores
Published: January 2025

Uz teorijski osvrt na ulogu muzeja i drugih institucija te medija u bilježenju, očuvanju i promociji usmene tradicijske kulture, rad donosi detaljan opis projekata „e-Spomenar: popularizacija i očuvanje tradicijske kulture Bistre“ i „e-Spomenar 2: terensko istraživanje, očuvanje i popularizacija tradicijske kulture Bistre“ Udruge Ekomuzej Bistra te sličnosti i razlike među njima. U dvadeset i sedam produciranih videozapisa u okviru projekata zabilježena su kazivanja, različiti usmenoknjiževni oblici i govor starijih kazivača, čime je ostvaren trajan zapis bistranskoga govora i temelj za daljnja istraživanja.Svjedočanstva kazivača pokazuju kontinuitet usmene tradicije. Edukativne informacije sadržane u videozapisima pružaju resurse za istraživače, nastavnike i edukatore, omogućujući im da, primjerice, koriste ove videozapise u učenju o usmenoj književnosti i medijskoj pismenosti. Udruga je ovim projektima ostvarila trajan doprinos u bilježenju, istraživanju i popularizaciji usmene bistranske književnosti u 21. stoljeću i jačanju vidljivosti organizacije.
Pokušaj participativnog pristupa istraživanju kulture Gluhih kroz medij filma
Authors: Viljetić Gordana
Published: January 2025

Rad donosi prikaz i praktično iskustvo pohađanja radionice „Etnografski eksperimenti“ u organizaciji Kinokluba Zagreb i sveučilišta University College London, 2022./2023., koja je, po završetku teorijskog dijela, rezultirala praktičnim vježbama – snimanjem kratkih etnografskih filmova, između ostalog i filma „Proba“ / “The Rehearsal“, čija je premijera održana u svibnju 2024. godine. Posljednjim se pokušalo pristupiti istraživanju kulture Gluhih maksimalno inkluzivno, odnosno u kokreaciji sa zajednicom, ne bez poteškoća, no s ciljem razvijanja dragocjenih veza i odnosa između kazivača i istraživača, kao jamstva za nastavak kontinuirane i aktivne suradnje u budućnosti.
RANCANG BANGUN SISTEM KONTROL MESIN PENGELAS KAPSUL IRADIASI OTOMATIS BERBASIS PLC
Authors: Yunus Yadi , Istanto Iwan , Kuntjoro Diandono , Suhendro Budi , Rahmansyah Harizt
Published: January 2025

Di PRTRRB-BRIN proses pembuatan kapsul iradiasi pengelasannya masih dilakukan secara manual oleh tenaga ahli las bersertifikat, hal ini menjadikan ketergantungan akan keberadaan tenaga ahli las bersertifikat tersebut. Untuk mengurangi ketergantungan tersebut maka dilakukan penelitian rancang bangun sistem kontrol mesin pengelas kapsul iradiasi otomatis berbasis PLC. Obyek kontrol dari sistem berupa 3 buah motor stepper sebagai aktuator mekanisme mesin las kapsul iradiasi. Motor stepper 1 sebagai aktuator gerakan vertikal naik-turun torch las menngarah dan balik titik awal pengelasan, motor stepper 2 sebagai aktuator gerak horizontal zig-zag untuk proses pelelehan awal dan pengelasan dan motor stepper 3 sebagai  aktuator gerak putaran roda pemegang kapsul untuk proses pengelasan flat melingkar tutup kapsul iradiasi. Untuk mempermudah operasional mesin las oleh operator, sistem kontrol dilengkapi dengan software human machine interface (HMI).  Otomatisasi mekanisme kerja mesin las mengggunakan pola pendekatan pada metode pengelasan secara manual, dimana pengelasan diawali dengan proses pelelehan awal base material dilanjutkan dengan proses pengelasan jalan flat normal hingga siklus pengelasan  selesai. Hasil uji simulasi pengelasan menunjukkan pola gambar daerah lasan telah memadai, keakurasian dan kepresisian gerak vertikal maupun horizontal  dari torch las masing-masing 100%, sedangkan akurasi dan presisi gerak roda putar pemutar kapsul iradiasi masing-masing 97,93 % dan 98,70 %
PENGARUH PENGGUNAAN KARET COMPO CREPE DENGAN FILLER CARBON BLACK TERHADAP KARAKTERISTIK FISIS VULKANISAT KARET UNTUK PRODUK KARET BANTALAN DERMAGA
Authors: Suwarno Yuli
Published: January 2025

Marine Rubber fenders are rubber products that function to absorb and transmit impact energy originating from ships to the dock structure and protect the dock from impacts from docked ships. Locally produced natural rubber-based marine rubber fenders often experiences quality problems in terms of resistance to wear and permanent compression. This research aims to study the effect of using compo crepe rubber with carbon black filler in making natural rubber vulcanisate for marine rubber fender products. In this research, carbon black filler was added with varying amounts of 60,65,70,75 and 80 phr. The experiment began with making a rubber compound on a laboratory scale. The rubber compound obtained was then molded for test samples to characterize the mechanical properties of vulcanized rubber for marine rubber fender. Test parameters refer to SNI 06-3568-2006. The combination of compo crepe natural rubber with all variations of carbon black filler are able to produce physical characteristic values of hardness, breaking stress, elongation at break, tear resistance that meet SNI standards. The compression value still meets SNI standards with carbon black 70 phr. Aging has a significant influence on the physical characteristics of elongation at break with a decrease in values that exceed SNI standards. Natural rubber compo crepe can be used as a raw material for marine rubber fender with the addition of a certain amount of carbon black.Keywords : marine rubber fender, compo crepe, carbon black, mechanical properties
Analisis Perubahan Frekuensi Motor Listrik Penggerak Pompa Hidrolik Terhadap Well Tractor Performance
Authors: Pongsapan Lia , Rahar Raditio , Gunawan Gunawan
Published: January 2025

Well tractor is a crucial tool in the oil and gas industry that enhances efficiency and productivity. This research aims to analyze the impact of changing the frequency of the electric motor driving the hydraulic pump on the performance of the well tractor. The experimental design involves using a well tractor with an electric motor whose frequency can be varied from 30 Hz to 60 Hz as the independent variable. At the same time, pull force and speed serve as dependent variables. The pull force on the well tractor is measured using a load cell, while speed is calculated using a digital tachometer. The research results indicate a positive and significant relationship between the frequency of the electric motor and the pull force and speed of the well tractor. As the frequency of the electric motor increases, so does the pull force and speed of the well tractor. The increase in pull force on the well tractor is caused by the increase in the rotational speed of the hydraulic pump, which is proportional to the frequency of the electric motor. This research demonstrates that using an electric motor with a higher frequency can enhance the performance of the well tractor. However, it should be noted that increasing the frequency of the electric motor can also lead to higher power consumption. Therefore, an economic analysis is necessary to determine the optimal frequency of the electric motor.
Kekuatan dan Durabilitas Oil Palm Shell (OPS) sebagai Alternatif Pengganti Agregat Kasar pada Beton Bertulang
Authors: Patah Dahlia , Dasar Amry , Ridhayani Irma , Suryani Herni , Saudi Akbar Indrawan , Sainuddin Sainuddin
Published: January 2025

Cangkang kelapa sawit atau Oil Palm Shell (OPS) berpotensi digunakan pada beton sebagai pengganti agregat kasar guna meningkatkan kekuatan dan durabilitas. Penelitian ini melakukan penyelidikan pada kekuatan dan potensi korosi (durabilitas) baja tulangan pada beton yang menggunakan OPS hingga berumur 244 hari. Penggunaan OPS sebesar 10% dan 20% sebagai pengganti sebagian dari agregat kasar untuk dibandingkan dengan nilai kekuatan dan durabilitas terhadap beton normal. Metode pengujian yang dilakukan untuk mengevaluasi penghambatan laju korosi baja tulangan beton yaitu melalui uji tekan beton, penyerapan air, porositas, half-cell potential (HCP), Rapid Chloride Permeability Test (RCPT), dan kedalaman penetrasi ion klorida. Hasilnya diperoleh bahwa kuat tekan beton menggunakan OPS 10% pada umur 20 hari memiliki kuat tekan yang relatif sama dengan beton normal. Lebih lanjut, berdasarkan pengujian HCP dan RCPT, beton menggunakan OPS 10% dan 20% memiliki kriteria potensi korosi sebesar 50% dan kedalaman penetrasi ion klorida yang sama dengan beton normal. Oleh karena itu, OPS berpotensi digunakan pada beton sebagai alternatif material pengganti sebagian agregat kasar.
ANALISIS KUAT TEKAN BETON DENGAN MENGGUNAKAN LIMBAH KULIT KERANG SEBAGAI SUBTITUSI AGREGAT KASAR PADA CAMPURAN BETON DENGAN MENGGUNAKAN BAHAN TAMBAH SUPERPLASTICIZER
Authors: Jamal Mardewi , Sari Anita Purnama , Haryanto Budi
Published: January 2025

Di bidang beton berbagai penelitian dan pengujian sedang dilakukan untuk meningkatkan kualitas beton dan bahan alternatif. Alternatif yang tersedia berupa daur ulang limbah lingkungan yang memerlukan inovasi dalam pencampuran beton dengan material lain. Pada penelitian ini kulit kerang digunakan sebagai pengganti agregat kasar pada campuran beton dengan variasi 0%, 3%, 6%, 9%, 12%, 15%, dan 18% dengan bahan tambah superplasticizer sebesar 0,5% dari berat semen. Persiapan benda uji berbentuk silinder yang berukuran 15 x 30 cm yang diuji tekan pada umur 28 hari. Pada penelitian ini mutu beton normal yang direncanakan fc’ = 25 Mpa digunakan sebagai kontrol pembanding. Berdasarkan hasil pemeriksaan kuat tekan beton normal adalah 37,24 Mpa. Untuk benda uji yang menggunakan limbah kulit kerang didapatkan hasil berturut-turut sebesar 38,38 Mpa; 36,79 Mpa; 38,36 Mpa; 35,11 Mpa; 32,26 Mpa; 32,24 Mpa; dan 30,49 Mpa. Kuat tekannya menurun seiring dengan meningkatnya persentase penambahan kulit kerang, namun tetap konsisten dengan mutu desain beton meskipun jumlah penambahan kulit kerang sebesar 18%.
Analisis Rencana Anggaran Biaya Menggunakan Konsep BIM 5D Pada Pekerjaan Struktur Proyek Villa Jalan Mulawarman Batakan Village Balikpapan
Authors: Fatchurrochman Muhammad Aljabbaaru , Hendriyani Irna , Pratiwi Reno
Published: January 2025

The development of construction technology is currently experiencing rapid progress, with many software programs in the construction field based on the concept of Building Information Modeling (BIM). Among the seven aspects of BIM, one aspect in construction planning is cost estimation planning, also known as BIM 5D. This study aims to analyze the application of the BIM 5D concept using Autodesk Revit 2021 Student Version software. The purpose of this research is to analyze the volume and cost planning using the Building Information Modeling (BIM) 5D concept in structural works, particularly in rebar, concrete, and roof structure works of the Villa construction project on Mulawarman Street, Balikpapan. The method used is to compare the consultant's analysis and BIM analysis. The research results show that the volume with the BIM 5D concept in rebar works is 8.63% smaller than the consultant's analysis, with the BIM 5D concept in concrete works is 9.55% smaller than the consultant's analysis, and with the BIM 5D concept in roof structure works is 64.12% smaller than the consultant's analysis. As for cost calculations, the BIM 5D concept in rebar works is 8.62% smaller than the consultant's analysis, with the BIM 5D concept in concrete works is 9.44% smaller than the consultant's analysis, and with the BIM 5D concept in roof structure works is 64.12% smaller than the consultant's analysis. The conclusion of this research is to identify and evaluate how the use of BIM can affect cost estimation for consultants.
Analisa Kekuatan Profil Hexagonal Castellated dengan Variasi Sudut Bukaan
Authors: Achmad, S.T., M.T Karmila , Anggraini Elok Delima , Wijadmoko Wijadmoko , Huda Masrul
Published: January 2025

Profil Hexagonal Castellated adalah struktur dengan elemen berbentuk hexagonal yang saling terhubung untuk membentuk rangkaian yang optimal dan tepat. Dalam penelitian ini dilakukan analisa kekuatan pada profil WF yang dimodifikasi menjadi profil Hexagonal Castellated dengan variasi sudut bukaan yaitu 30°,45° dan 60°. Analisa dilakukan dengan metode LRFD dengan menggabungkan faktor beban dan faktor ketahanan untuk menentukan kekuatan struktur dengan lebih akurat. Faktor beban mencakup beban mati,beban hidup dan beban angina, sedangkan faktor ketahanan mencakup faktor keamanan terhadap kegagalan profil dan material. Kekuatan profil hexagonal castellated ditinjau dari kekuatan geser dan kekuatan lenturnya.Hasil dari analisa variasi sudut bukaan 30°,45° dan 60° didapatkan nilai teganagan geser terbesar pada sudut bukaan 30° yaitu 156,81 MPa  dan nilai tegangan lentur terbesar pada sudut bukaan 45° yaitu 102,21 MPa
IMPLEMENTASI KONSEP BUILDING INFORMATION MODELLING (BIM) 5D PADA PEKERJAAN STRUKTUR UNTUK EFISIENSI BIAYA PROYEK
Authors: Pratama Rizky Eka , Hendriyani Irna , Pratiwi Reno
Published: January 2025

Technological advances have entered the 5.0 revolution, where technology in various fields, especially construction, is thriving. The technology is particularly useful in modeling, planning, cost and volume estimation, continuity, and building management. Almost all areas of work have now adopted automation with the use of software, including AEC (Architecture, Engineering and Construction). One of the technologies in the AEC field is Building Information Modelling (BIM), the BIM 5D Concept has proven to be efficient in handling cost control, as research shows that there is a minimal difference in computation in cost estimation. This study implemented BIM 5D on the Type 300 2-story boarding house construction project in Sepinggan Lestari Housing, Balikpapan. Based on the project's previous cost calculations, MS Excel and 2D images were then compared to Revit software. With a contract value of Rp. 3,275,204,419, the cost of concrete and ironing each is IDR. 156,929,007 and Rp. 550.910.751. Analysis shows that the use of BIM 5D results in more efficient volume and cost calculations than conventional methods. The volume calculation difference for ironing was 6.92%, and for concrete was 15.06%. The difference in ironing costs was 11.54%, and concrete was 15.06%, indicating that the consultant's calculated volume was greater than that of Revit. This study concluded that the implementation of BIM 5D could improve the accuracy of cost and efficiency calculations in construction projects.
Sistem Pusat Pelayanan Anak Untuk Optimalisasi Perkembangan Anak Berbasis Web
Authors: Ferianti Lydya Ayu , Nugraha Fajar
Published: January 2025

In the current era, advances in information technology have led to an urgent need for more efficient management systems and services, especially in the context of children's services. Certified Independent Study offers students the opportunity to prepare themselves in full stack web development, with the aim of producing high quality and competitive web applications. The developed children's center web application is designed to handle various aspects of children's administration and services as a whole. The main features of the application include registration, health monitoring, education management, as well as coordination of social activities. This integrated platform not only allows parents and related parties to access real-time information but also facilitates better collaboration in providing optimal services to children. The research shows that the method applied in the development of this application is effective in improving efficiency and ease of use, with the results of the System Usability Scale (SUS) assessment reaching an average of 83.3 which indicates the predicate "Good". Thus, this child service center web application is expected to be an innovative solution to overcome various challenges in child services and support holistic growth and development of children.
Perbandingan Variasi Bahan Insulasi terhadap Temperatur di dalam Ruang Box Panel Listrik Akibat Terpapar Sinar Matahari
Authors: Mulyanto (SCOPUS ID 57190940497) Subur , Kurniawan Yudi , Arwin Arwin , Dwimas Herdian
Published: January 2025

This Studies, we conducted experiments on several insulation materials in outdoor electrical panel boxes to determine the recommended materials for reducing the temperature produced by heat generated due to hot sunlight. The insulation materials used include Styrofoam, Plywood and GRC. The experiment carried out was by exposing the insulated panel box to sunlight. The results of the experiments carried out showed an increase in temperature of up to 40.10C for standard box panels without insulation, 33.880C for box panels with Styrofoam insulation, 36.780C for Plywood insulation and 36.050C for GRC insulation. From the experimental results, panel boxes without insulation experienced a very high increase, so that the potential could cause damage to components inside the panel box more quickly. Meanwhile, the box panels that are most stable in maintaining temperature are those that use Styrofoam insulation. Based on these results, Styrofoam material is highly recommended to be used as insulation material for electrical panel boxes
Pemanfaatan Fly Ash Sebagai Bahan Alternatif Pada Bata Beton Untuk meningkatkan Peredaman Panas
Authors: Chardova Andreas , Napitupulu Robert , Kurniawan Zaldy
Published: January 2025

Pemanfataan fly ash sebagai bahan tambah bata beton memberikan dampak positif terhadap lingkungan, selain mengurangi pencemaran lingkungan. Fly ash memiliki kandungan  silikat yang kemiripan seperti semen, penambahan fly ash pada campuran bata beton bisa menjadi bahan tambah mineral yang baik untuk bata beton karena fly ash tersebut mengandung silika yang bersifat mengikat. Penelitian ini bertujuan untuk mengetahui pengaruh limbah fly ash sebagai bahan tambah terhadap peredaman panas serta mengetahui nilai komposisi yang tertinggi dan terendah untuk penambahan limbah fly ash terhadap bata beton agar dapat meredam panas. Metode yang digunakan dalam penelitian ini adalah metode full faktorial dengan variabel proses  fly ash : pasir 10% : 60%, 20% : 50%, 30% : 40% dan lama pengeringan 3 dan 5 hari, dan dilakukan uji peredaman panas sebagai respon yang diamati dengan jumlah 6 spesimen dan 3 kali replikasi pada setiap spesimen. Berdasarkan  hasil penelitian yang diperoleh menunjukkan bahwa spesimen dengan fly ash : pasir 30% : 40% dengan waktu pengeringan 5 hari mendapatkan nilai tertinggi sebesar 6,6oC. sedangkan  fly ash : pasir 10% : 60% dengan waktu pengeringan 3 hari mendapatkan nilai terendah sebesar 4oC.
Generative AI in Graph-Based Spatial Computing: Techniques and Use Cases
Authors: Thamma Sankara Reddy
Published: January 2025

Generative AI has proven itself as an efficient innovation in many fields including writing and even analyzing data. For spatial computing, it provides a potential solution for solving such issues related to data manipulation and analysis within the spatial computing domain. This paper aims to discuss the probabilities of applying generative AI to graph-based spatial computing; to describe new approaches in detail; to shed light on their use cases; and to demonstrate the value that they add. This technique thus incorporates graph theory, generative models to model spatial relations, generate new spatial forms and improve on spatial decision-making processes. The paper surveys such methods, describes typical applications, and outlines further development of the subject.
Perlindungan Hukum terhadap Korban Perbuatan Ingkar Janji Menikah menurut Hukum Perdata
Authors: Pulungan Nita Nilan Sry Rezky , Ghuffran Mohammad , Nugraha Dinda Adistya
Published: January 2025

Perjanjian menimbulkan perikatan atau menciptakan ikatan hukum yang melahirkan adanya pemenuhan tanggung jawab dan hak masing-masing pihak dalam perjanjian. Peristiwa ingkar janji perkawinan sering kali terjadi. Apabila salah satu pihak membatalkan perkawinan secara sepihak tanpa adanya kesepakatan dengan pihak lainnya, maka pihak yang merasa dirugikan dapat mengajukan gugatan ke pengadilan. Peristiwa ingkar janji untuk menikahi pasangan kerap terjadi di indonesia hingga dapat digolongkan dalam perbuatan yang melawan hukum, karena ada unsur-unsur yang dapat digolongkan dalam perbuatan melawan hukum terkandung dalam perjanjian tersebut salah satu pihak melepaskan kewajiban yang seharusnya ia laksanakan kepada pihak lainnya yang merasakan kerugian baik secara materil maupun immateril akan ingkar janji menikahi. Perbuatan melawan hukum adalah perbuatan orang yang melanggar aturan hukum berupa hukum tertulis ataupun hukum tidak tertulis berupa tindakan yang tidak sesuai dengan kepatutan ataupun berlawanan secara nyata dengan norma yang berlaku di masyarakat. Perlindungan hukum yang didapat korban yakni kompensasi nominal berupa ganti rugi yang dibayarkan kepada korban dalam bentuk sejumlah nilai uang sesuai dengan keadilan yang didasarkan pada pertimbangan akibat dari suatu perbuatan melanggar hukum serta kompensasi atau ganti rugi immateriil merupakan ganti rugi yang diberikan pada korban yang didasarkan pada jumlah kerugian yang dialami akibat perbuatan yang melanggar hukum berupa besaran uang yang tidak dapat dikalkulasi secara materil, menurut pertimbangan hakim.