bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Launcher’s Productivity in Erection Girder Using Time Motion Study Method
Authors: Hadiyatmoko Danang , Hatmoko Jati Utomo Dwi , Wibowo M. Agung 
Published: August 2023

Erection girder is one of the determinants of the success of bridge and road work, so in its implementation, it is of concern to many parties. Apart from lifting work that uses heavy equipment with a large capacity, it is also due to the high risk of erection work. Since using heavy equipment as a tool for the erection girder, then closely related to productivity and work time. Many factors affect the productivity of heavy equipment, and one of them is time, so a well and measurable work plan is needed. This study aims to provide solutions to problems regarding the productivity of the erection girder launcher method with a time motion study analysis for each work cycle. Time Motion Study is calculated using collected data from time and productivity records. The analysis model has been carried out with the amount of data of 58 erection girder cycles with the specification of Girder Profile I with 16 meters, 30 meters, 40 meters, and 60 meters in length. The modeling results are in the form of productivity nomograms and optimal productivity of the erection girder launcher method. The optimal productivity of a 16-meter girder is 0.901 girder/hour, 30 meters girder is 0.692 girder/hour, a 40 meters girder is 0.443 girder/hour, and 60 meters girder is 0.340 girder/hour. In this study, there are some renewals from other studies. From this study, it might be known about factors that affect the productivity of erection girders, such as the distance of the girder’s stockyard, the girder’s length, and erection time. Doi: 10.28991/CEJ-2023-09-08-06 Full Text: PDF
Performance Analysis of Nanofluid-based Photovoltaic Thermal Collector with Different Convection Cooling Flow
Authors: Arifin Zainal , Khairunisa Nuha , Kristiawan Budi , Prasetyo Singgih Dwi , Bangun Watuhumalang Bhre 
Published: August 2023

Using solar energy through photovoltaic (PV) panels has excellent potential as an alternative energy source. However, the problem of high operating temperatures causing a reduction in work efficiency needs to be addressed. This study aimed to analyze the development of a cooling system to increase PV panels' electrical and thermal efficiency. The research involved analyzing the use of TiO2, Al2O3, and ZnO working fluids by adding 0.5 vol% to water in an active cooling method. The cooling system involved a rectangular spiral and a rectangular tube behind the PV panel. A solar simulator simulated solar radiation with intensity variations to analyze the cooling system's performance in different working conditions. The results showed that the heat exchanger with a nanofluid configuration reduced the panel temperature by 14 oC, which increased the electrical efficiency by up to 4.7% in the ZnO nanofluid. In the rectangular spiral configuration, the ZnO nanofluid reduced the panel temperature from 60 to 45 oC, increasing the Isc value from 2.16A to 2.9A and the Voc value from 21.5V to 23V. This resulted in a maximum power increase of the panel to 53W. Doi: 10.28991/CEJ-2023-09-08-08 Full Text: PDF
¿Reconoce esta clave diagnóstica?
Authors: Erazo Luna Vanesa , Díaz Dilia , Ospina Juan Pablo 
Published: August 2023

Al enfrentarnos a una paciente con múltiples factores de riesgo cardiovasculares, hospitalizada por un episodio agudo de enfermedad renal crónica terminal, con alteración del equilibrio calcio-fósforo por el hiperparatiroidismo secundario, quien desarrolló en la piel de los miembros inferiores placas eritemato-violáceas, que evolucionaron a ampollas y luego a úlceras dolorosas, de bordes bien definidos y configuración estrellada, la primera opción diagnóstica que se consideró fue calcifilaxis.
Optimization of assembly devices of automated workplaces using the TRIZ methodology
Authors: Vanko Karol , Pompáš Lukáš , Madaj Rudolf , Vicen Martin , Šutka Jozef 
Published: August 2023

Abstract
The presented article familiarizes the reader with optimizing the workplaces of ultrasonic welding machines. The essential part of the article deals with prototypes, the construction of which does not meet the requirements for production, economy, and functionality. The experimental analysis runs pointed out shortcomings and inaccuracies. The developer’s team used one of the well-known optimization and design methods to solve this issue. It is the TRIZ method (Creating and solving creative assignments). The mentioned method combines two powerful tools into one whole. Specifically, it is the Function and Cost Analysis (FNA) and the algorithm for solving creative assignments (ARIZ). The manuscript describes the use of the method for a more straightforward solution to problematic parts of the structure. The result of the optimization process is a new, improved structure whose properties were confirmed in terms of stiffness by simulation in the ANSYS Workbench program. The applications of optimized parts will also be used in other similar devices. The research will follow up with the design of a new series of ultrasonic welding machines in the future.
Bearing capacity of reinforced concrete beams with and without damages of rebar
Authors: Khmil Roman , Blikharskyy Zinoviy , Vegera Pavlo , Kopiika Nadiia 
Published: August 2023

Abstract
The article presents the results of the bearing capacity of reinforced concrete beams with and without damages of internal reinforcement. One of the main elements of the production of the reinforced concrete industry is beams. The analysis of the experimental tests showed that the bearing capacity of reinforced concrete beams with damaged tensile main reinforcement decreases according to control undamaged samples due to the reduction of the reinforcement cross-section. However, the bearing capacity of reinforced concrete beams with tensile main reinforcement Ø20А500C, damaged to the cross-section area equal the rebar Ø16mm is more on 3.7… 24.0% than the bearing capacity of reinforced concrete beams with undamaged Ø16mm rebar. This is due to the non-uniform material properties of used thermally strengthened reinforcement A500C. When during testing the tensile main reinforcement is damaged by drilling a hole, the most damages occur in the core with lower physical and mechanical characteristics. In contrast, the outer thermally strengthened layer with bigger physical and mechanical characteristics is damaged to a lesser extent. The analysis of the obtained results shows that during design of reinforced concrete beams with damaged, it is necessary to consider using thermally strengthened non-uniform steel A500C as tensile main reinforcement.
Influence of the drill bit tip geometry on the rotary drilling process performed with a hand-held hydraulic drill
Authors: Bołoz Łukasz 
Published: August 2023

Abstract
In the mining and construction industries, hand drills are used to carry out many processes related to excavation and auxiliary works. Hand drilling is commonly applied for making small diameter holes, especially in hard-to-reach places. In the case of manual drilling, an important parameter is drilling resistance, especially torque. Drilling tools are subject to wear, which has a negative impact on the process of drilling, including resistance and efficiency. A blunt tool lowers the drilling speed and puts more strain on the operator. The article presents the results of laboratory tests of selected parameters of the drilling process carried out with a hydraulic rotary drill. The tests were performed with the use of new drill bits as well as drills characterized by a various degree of wear. The tests were carried out for popular, frequently applied rotary drilling tools, on a unique laboratory stand that enabled setting the feed force and measuring the torque, rotational speed, drilling path, drilling speed as well as the in and out pressure of the drill. A number of characteristics were determined as a function of time and depth of the drilled hole. It was found that tool blunting affects the drilling process in various ways, whereas the intensity of this influence is determined by the type of blunting. The test results can provide a basis for developing a criterion for replacing a drill bit with a new one.
Hemodynamic and Clinical Outcomes of Milrinone Compared to Dobutamine in Cardiogenic Shock: A-Systematic Review and Meta-Analysis
Authors: Bahagia William 
Published: August 2023

Background
Despite years of clinical experience with the two most commonly used inotropes i.e dobutamine and milrinone, in the cardiogenic shock setting, there is a lack of head-to-head comparison between inotropes in cardiogenic shock. We conducted a systematic review and meta-analysis on the comparison of hemodynamic and clinical effects of dobutamine and milrinone in cardiogenic shock.
Methods
A comprehensive literature search using PubMed and Scopus was performed. Among 40 studies retrieved from the database, 3 studies were included for hemodynamic comparison outcome and 2 studies for clinical outcomes.
Results
Three studies with 101 patients were included for hemodynamic analysis and two studies with 146 patients for clinical analysis. We observed no significant difference between cardiac index, pulmonary capillary wedge pressure, and mean arterial pressure at 1 hour after milrinone and dobutamine administration. However, there is significantly lower mPAP after milrinone infusion compared to dobutamine (mean difference -8,7 (-9,97 to -7,43) mmHg, p<0,01). We also observed no significant difference in in-hospital mortality but significantly shorter ICU length of stay in the milrinone group (mean difference -1 (-1,92 to -0,08) days).
Conclusion
Administration of milrinone resulted in lower PA pressure and shorter ICU LOS compared to dobutamine in patients with cardiogenic shock.
Cardiogenic Shock
Authors: Bagaswoto Hendry Purnasidha 
Published: August 2023

Abstract: Cardiogenic shock (CS) is the most common cause of death in hospitalized patients with acute myocardial infarction (AMI). The incidence and mortality of CS in hospitals is also high, although advanced therapy is widely used in CS patients. CS is a condition characterized by inadequate cardiac output due to primary cardiovascular diseases, leading to clinical and biochemical manifestations of insufficient tissue perfusion. CS complicates 5–10% of AMI. STEMI increases the risk of CS approximately twice as much as NSTEMI. In the last 10 years, in-hospital mortality due to CS that occurs in AMI has not changed, that is at 40-50%. The pathophysiology of CS shows several overlaps and can occur simultaneously, that is starting with a cardiac insult that reduces cardiac output, central hemodynamic changes, microcirculatory dysfunction, systemic inflammatory response syndrome, and multi-organ dysfunction. CS classification based on SCAI, divided into 5, that’s A(at risk), B(beginning CS), C(classic CS), D(deteriorating), and E(extremis). The key to managing CS is treating the patient as soon as possible, as each higher SCAI shock stage was associated with increased hospital mortality. All patients with suspected ACS-associated CS should have an early invasive strategy with appropriate revascularization. Vasoactive medicines have the potential to improve hemodynamics but at the expense of increased myocardial oxygen consumption and arrhythmogenic risk. Mechanical circulatory support (MCS) has insufficient data as the first-line device solution for CS patients. However, the use of durable MCS devices in a bridge-to-bridge strategy is becoming more prevalent and is supported by clinical recommendations. APACHE-III and SAPS-II, had the best mortality discrimination values to assess the outcome in CS patients.
Keywords: cardiogenic shock, classification, heart failure, myocardial infarction, SCAI
Antioxidant Activity and Total Flavonoid Propolis Stingless Bee
Authors: Hasan Akhmad Endang Zainal , Safira Ukhradiya Maharaniq , Purnamasari Anita , Wardatun Sri 
Published: August 2023

Propolis from Indonesia contains secondary metabolites which include flavonoids and other organic compounds. The ethanol extract of 70% propolis Trigona spp from Pandeglang can be used as an antibacterial compound. The purpose of this study was to examine the toxicity of the propolis and nanopropolis with an LC50 value, test the antioxidant activity with an IC50 value, and determine the total flavonoid content. LC50 was determined by the BSLT method on Artemia salina Leach larvae. The antioxidant activity was tested using the DPPH method (1,1 diphenyl-2-picrylhydrazil), and the determination of flavonoid content was carried out with aluminum chloride. The results showed that the LC50 value of propolis was 16.010 ppm, and for 20% nanopropolis was 18.689 ppm. Antioxidant activity obtained IC50 value for propolis is 95.54593 ppm, for 20% nanopropolis is 527.7939 ppm. The total flavonoid content of the propolis was 2.1123%, and the total flavonoid content for the nanopropolis equivalent extract was 1.5293%.
Penggunaan Zeolit Alam Sebagai Media Penyaring Air Dalam Skala Rumah Tangga Pada Kawasan Karst Malang Selatan
Authors: Susanti Nelya Eka , Sari Yuli Ifana , Indawati Ninik 
Published: August 2023

Abstract: In the springs in Sumberagung Village, Sumbermanjing Wetan District, there is an HCO3- content of 565.50 mg/l (Perdana, 2016). The dissolved HCO3- content in the karst springs makes the water unfit for daily use. So from this situation, it is necessary to have appropriate technology in an effort to minimize substances dissolved in water by filtering clean water so that it is more suitable for use by the community for household needs. Community service by using natural zeolite as a filter media has the following work procedures: 1) collecting water filter materials, 2) making an installation design framework, 3) compiling natural zeolite into the installation, 4) product trials, 5) making media posters or banners regarding the dangers of lime content for health, and also regarding the stages of making a water filter installation so that the general public can read it. The results obtained from community service activities are as follows: 1) fulfillment of water filter material in the form of natural zeolite, 2) arrangement of the installation design framework for water filter media, 3) arrangement of water filter material into the installation, 4) ready-to-use products, 5) media posters as a medium of socialization has been accepted by society.Abstrak: Pada mataair di Desa Sumberagung Kecamatan Sumbermanjing Wetan terdapat kandungan HCO3- sebesar 565,50 mg/l (Perdana, 2016). Kandungan HCO3- yang terlarut pada mataair karst tersebut membuat kondisi air kurang layak digunakan untuk keperluan sehari-hari. Sehingga dari situasi tersebut perlu adanya teknologi tepat guna sebagai upaya meminimalisir zat yang terlarut dalam air dengan melakukan penyaringan air bersih agar lebih layak digunakan oleh masyarakat untuk keperluan rumah tangga. Pengabdian kepada masyarakat dengan menggunakan zeolit alam sebagai media penyaring memiliki prosedur kerja sebagai berikut: 1) mengumpulkan bahan penyaring air, 2) membuat kerangka desain instalasi, 3) menyusun zeolit alam ke dalam instalasi, 4) uji coba produk, 5) pembuatan media poster atau spanduk mengenai bahaya kandungan kapur bagi kesehatan, dan juga mengenai tahapan pembuatan instalasi penyaring air agar bisa dibaca oleh masyarakat secara umum. Hasil yang diperoleh dari kegiatan pengabdian adalah sebagai berikut: 1) terpenuhinya bahan penyaring air berupa zeolit alam, 2) tersusunnya kerangka desain instalasi media penyaring air, 3) tersusunnya bahan penyaring air ke dalam instalasi, 4) produk siap digunakan, 5) media poster sebagai media sosialisasi telah diterima masyarakat.
Wildhuftiere und Waldverjüngung: Wenn die Zeit davonläuft
Authors: Bebi Peter , Leuch Barbara Allgaier , Bugmann Harald , Conedera Marco , Frehner Monika , Insinna Patrick , Kupferschmid Andrea Doris , Lévesque Mathieu , Moos Christine , Muhmenthaler Julian , Oncelli Adrian , Thormann Jean-Jacques , Zürcher Samuel 
Published: August 2023

Abstract
Der rasch fortschreitende Klimawandel gefährdet wichtige Waldleistungen, da sich die Wälder den sich verändernden Bedingungen nicht schnell genug anpassen können. Damit die Waldleistungen auch in Zukunft erbracht werden können, ist eine möglichst artenreiche Verjüngung zukunftsfähiger Baumarten zentral. So werden die Wälder gegenüber Störungen resilienter. Der in vielen Regionen der Schweiz seit Jahrzehnten sehr hohe Verbiss der Waldverjüngung durch Wildhuftiere stellt in dieser Hinsicht eine grosse Herausforderung dar. Verschiedene Beispiele zeigen, dass eine ausreichende Waldverjüngung nur möglich ist, wenn nebst waldbaulichen Massnahmen eine gezielte, regional differenzierte Reduktion des heutigen Wildbestandes erfolgt. Dies wiederum erfordert eine konstruktive und auf gemeinsamen Zielen beruhende Zusammenarbeit zwischen Jagd und Forst sowie gesellschaftlich-politische Rahmenbedingungen, die diese Zusammenarbeit im Sinn des nationalen Gesetzesauftrags und der Erfüllung der zukünftigen Aufgaben des Waldes fördern und wertschätzen.
Trajectories of mother-infant synchrony in response to stress: developmental stability and impact of maternal childhood trauma and infant temperament
Authors: Meixner Tamara L. 
Published: August 2023

<p> Young infants largely depend on their primary caregivers to regulate their emotions. While considerable research has explored infant and maternal behaviour and physiology during this process, few studies have explored trajectories of behaviour and physiology in response to a stressor concurrently, dyadically, and longitudinally. This dissertation addressed these limitations. In a community sample (N = 108), maternal and infant Respiratory Sinus Arrythmia (RSA) reactivity and behavioural synchrony after exposure to a brief dyadic stressor (i.e., StillFace Paradigm) was assessed when infants were 3.5 months and 7 months of age. Contrary to hypotheses, neither infant nor maternal RSA or behavioural synchrony significantly changed during the 2-minute recovery episode. Trajectories of RSA did not significantly co-vary between mother and infant and were not significantly related to changes in behavioural synchrony. However, when maternal exposure to childhood trauma was added to the model, variability in trajectories was indicated. Infants of mothers reporting higher levels of childhood trauma exposure showed higher initial RSA reactivity and a steeper decline in RSA reactivity across the recovery period. A significant increase in RSA reactivity across the recovery period was also seen for infants who were rated by mothers as showing more negative affectivity. Interestingly, these covariates were significant at 7 months but not at 3.5 months, suggesting a possible influence of development or experience within the mother-infant relationship. A comprehensive and critical analysis of these results in light of extensive heterogeneity of findings and iv operationalization of constructs in this area of study are provided, along with insights to guide future research. </p>
Analisis Perkembangan Anak Taman Kanak-kanak Di Kelurahan Kemumu, Berbasis DDST
Authors: Suryadi Didik , Daryati Melia Eka 
Published: August 2023

Tujuan penelitian ini adalah untuk mengumpulan dan menganalisis data perkembangan anak dalam aspek perkembangan personal sosial, bahasa dan motorik. Data dikumpulkan dengan menggunakan DDST ( Denver Developmental Screening Test). Metode penelitian berupa survey. Sampel adalah anak usia 4-6 tahun yang menjadi peserta didik pada 2 lembaga Taman Kanak-kanak di Desa Kemumu Kecamtan Armajaya, Kabupaten Argamakmur, yaitu TK Kencana Mandiri, Bengkulu Utara yang berjumlah 58 anak. Hasil dari penelitian ini adalah data perkembangan aspek personal sosial, motorik kasar dan motorik halus serta perkembangan aspek Bahasa. Hasil penelitian menunjukkan bahwa 83 % anak mengalami perkembangan dalam kategori normal, dan 17 persen dalam kategori suspek.
Desain Didaktis Pembelajaran Matematika untuk Mengatasi Learning Obstacles Siswa SMP dalam Mempelajari Materi Aljabar
Authors: Ardiansari Lia , Suryadi Didi , Dasari Dadan 
Published: August 2023

Abstrak. Penelitian ini dilatarbelakangi oleh banyaknya siswa SMP yang mengalami hambatan belajar (learning obstacle) pada saat mempelajari aljabar. Penelitian desain didaktis (didactial design research) digunakan dalam penelitian ini yang diawali dengan studi pendahuluan untuk mendapatkan data learning obstacle di enam kelas pada tiga SMP dengan kluster yang berbeda-beda. Tujuan dari penelitian ini yaitu menghasilkan suatu desain pembelajaran yang diharapkan dapat meminimalkan learning obstacles yang ditemukan. Terdapat tiga kategori learning obstacle yang ditemukan yaitu ontogenic obstacle, didactical obstacle, dan epistemological obstacle sebelum bahan ajar dibuat. Desain didaktis yang ditawarkan berdasarkan hasil studi pendahuluan tersebut disusun dengan tahapan dimulai dari pemberian konsep awal secara aritmatika, trajectory (penghubung) yaitu tahap pra-aljabar, kemudian konsep akhir aljabar secara formal. Hasil dari penelitian ini merupakan hasil uji coba terbatas kepada 28 siswa kelas VII SMP dimana siswa memberikan tanggapan positif terhadap desain didaktis yang dikembangkan.Kata Kunci: Aljabar, Penelitian Desain Didaktis, Hambatan Belajar.
Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT
Authors: Plutenko Tetiana , V'yunov Oleg , Fedorchuk Oleksandr , Yanchevskii Oleg , Torchyniuk Pavlo 
Published: August 2023

La0.67LixTi1-xAlxO3 ceramics (x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30) were synthesized with the use of Al2O3 and an aqueous solution of Al(NO3)3 as an aluminium source. In both cases, the ceramics preserve a high dielectric constant ε ~ 105. It was found that the single-phase La0.67LixTi1-xAlxO3 perovskite structure is formed at temperatures above 1200 C. It was shown that the use of Al(NO3)3 allows simplifying the synthesis: reduction in the sintering temperature by 20 C, Li loss and, as a result, an increase in the density of ceramics. Ceramics La0.67Li0.15Ti0.85Al0.15O3 with a maximum density higher than 85 % were sintered at about 1280 and 1300 C of with the use of Al(NO3)3 and Al2O3 respectively. Frequency spectra of ima­ginary parts of impedance and electrical modulus demonstrate two dispersion regions that refer to processes in the ceramic grains’ boundaries and ceramic grains. Ceramic samples synthesized using Al(NO3)3 solutions tend to exhibit higher dielectric constants than those synthesized using Al2O3. At a frequency of 100 Hz, the dielectric constant for ceramics synthesized using Al(NO3)3 aqueous solution is 70600, whereas that for ceramics synthesized using Al2O3 is 44300. Obtained materials are useful for microelectronics, energy storage and harvesting devices.