bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Different High-Velocity Thermally Sprayed Coatings to Recover AISI H13 High-Pressure Die-Casting Molds
Authors: Mayer Andre R. , Sabino Eriel B. , Fals Hipolito D. C. , Pukasiewicz Anderson G.M. , de Oliveira Willian R. , Björklund Stefan , Joshi Shrikant 
Published: August 2024

Abstract
High-pressure die casting (HPDC) is a well-established manufacturing process used in the automotive sector to make high-precision components. The necessity to reduce fuel consumption increases the use of low-density components in the automotive industry. Corrosion induced by molten metal is one of many failure modes for dies, changing the die's geometry and surface roughness. All combined wear changes the dimensional precision of the manufactured parts but also the surface quality of the components. Many additive deposition methods are applied to decrease wear and recover the surface. Thermally sprayed coatings can improve the surface properties and recover the geometry of the die caused by the aluminum attack. The main objective of this work is to observe the behavior of the H13, Cr3C2-25NiCr, and WC10Co4Cr coatings deposited by HVOF and HVAF, tested against Aluminum corrosion and Die-soldering tests. After dissolution, the chromium carbide reacts with the aluminum, creating a tough intermetallic interface, and raising the extraction tensile stress. After Aluminum corrosion tests, it was observed that the WC 10Co 4Cr HVAF coating presented low adhesion to the aluminum with no observed coating failure due to the formation of intermetallic. Die soldering tests indicated that the WC 10Co 4Cr protects the substrate, resulting in lower extraction tensile stress than H13 base material and other HVOF coatings. It was possible to observe that WC 10Co 4Cr HVAF coating showed results comparable to AlCrN PVD coating.
Mold-Resistant Air Filters Embedded with Copper Particles
Authors: Pershin L. , Delage S. , Zhang M. , Ringuette M. , Mostaghimi J. 
Published: August 2024

Abstract
Air quality in buildings is often controlled by various Heating, Ventilation, and Air Conditioning (HVAC) systems. These systems are equipped with air filters to reduce dust and aerosol load in the air. Ambient aerosol particles may contain different organic matter such as pollen, bacteria, and fungi. In warm and humid indoor air conditions, the presence of such air particles may result in the growth and transmission of infectious bacteria, fungi, and mold spores.
Antibacterial Surface Coatings by Plasma Spray (APS/SPS) and Physical Vapor Deposition (PVD) Processes: A Comparative Approach
Authors: Youssef Laurène , Prorot Audrey , Gnodé Laurène , Maerten Thibault , Belvèze Simon , Acikgoz Canet , Manninen Noora , Rat Vincent , Vardelle Armelle , Denoirjean A. 
Published: August 2024

Abstract
An optimized powder/suspension based atmospheric Plasma Spray (PS) process, using a Triplex Pro 210TM torch, was implemented to elaborate Cu:TiO2 surface coatings on stainless steel. Nanometric Degussa P25TM powder was prepared in a water-based suspension and co-sprayed with a Cu spheroidal powder. The bacterial reduction, evaluated with 1h-exposure to Escherichia Coli (E. Coli), was two times higher for the Cu:TiO2 coating compared to the bare stainless steel substrate. Since the coatings obtained by plasma spray are relatively porous, their antibacterial efficacy was compared to smooth Ag and Cu doped titanium nitride (TiN) films obtained by physical vapor deposition technique (PVD). For the same exposure time, the PVD smooth coatings showed a much lower antibacterial efficacy proving the topography effect on bacterial adhesion.
Nozzle Geometry Optimization for Cold Spray Applications by Using 3D-CFD Calculations
Authors: Gutiérrez de Frutos J. , List A. , Gärtner F. , Klassen T. 
Published: August 2024

Abstract
In cold spray, optimum process conditions to accelerate particles vary with different densities and melting temperatures of the materials. Therefore, material-specific nozzle designs are required. In the present study, a nozzle geometry optimization concept based on 3D-CFD simulations was developed to provide a specific nozzle design for a given material. Al6061 and pure copper with mean particle diameters of 40 μm were taken as examples. Together with a design of experiments (DoE) approach, the model seeks for the optimal nozzle geometry. In order to reach the highest particle velocity prior to impact upon the substrate, different geometry parameters were varied, such as the nozzle throat cross section, the aspect ratio, and the nozzle divergent section length. The process gas was nitrogen with set stagnation pressure and temperature of 50 bars and 500 °C. For both materials, the simulation identified nozzle divergent section length as the most influential parameter, followed by the throat cross-section. The aspect ratio must be tuned to avoid over expansion of the gas in the nozzle.
Lightblast Laser Ablation Technology
Authors: Wanski Thomas , Herwig Patrick , Hauptmann Jan 
Published: August 2024

Abstract
The Fraunhofer Institute for Material and Beam Technology IWS in Dresden has developed “Lightblast,” a laser ablation technology for creating clean, structured surfaces. Lasers offer precision, reproducibility, cost-effectiveness, and environmental friendliness, opening new possibilities in surface treatment. Traditional blasting processes employ compressed air to propel abrasive particles at high speed onto a substrate. This method often results in embedded abrasive particles, surface contamination, and rapid abrasive wear, compromising process consistency. Additionally, the abrasive waste poses environmental and disposal challenges. Lightblast utilizes a continuous wave single-mode laser and a dynamic galvanometer scanner to precisely vaporize the substrate without abrasives. Adjustable parameters control the resulting surface roughness with high reproducibility. Unlike pulsed laser ablation, the continuous wave laser enables higher productivity due to increased power. Furthermore, Lightblast allows for selective surface structuring based on CAD designs without additional masking. Target applications include surface preparation for coating, bonding, and joining processes.
Analisa Total Productive Maintenance Guna Meningkatkan Produktivitas Mesin Ekstrusi Type 2500 Menggunakan Metode Overall Equipment Effectiveness (OEE)
Authors: Muhazir Achmad , Sinaga Zulkani , Pratama Gusti Andhika Aji 
Published: August 2024

Manufacturing industry companies are always faced with productivity, quality and delivery problems as demanded from customers, PT. XYZ is engaged in manufacturing various aluminum profile products during the 2020 period, the company experienced a type 2500 extrusion machine downtime of 9807 minutes, exceeding the company's standard of 7800 minutes a year, this is one of the causes of a decline in production. This study aims to determine the effectiveness of the machine using the OEE (overall equipment effectiveness) method, to increase the productivity of the type 2500 extrusion machine from the results of the six big losses analysis to identify the main cause of the downtime of the type 2500 extrusion machine. The results show that the overall equipment effectiveness measurement is obtained the average Avaibility Ratio presentation is 92.24%, Performance Ratio is 49.56% and Quality Rate is 99.72% so that the average overall equipment effectiveness value is 45.61% where this value is still below the average ideal value overall equipment effectiveness is 85%. The results of the measurement of six big losses obtained the results of downtime values: equipment failure losses 3.81%, setup and adjustment losses 3.95%, speed losses: idle and minor stoppage 3.03%, reduce speed losses 46.51%, quality losses: defect losses 0.13%, reduced yield 0% , from these data it is known that the main problem is in the speed losses section with the highest loss in reduce speed losses of 46.51%. The factors that dominate the main cause of downtime for the 2500 extrusion machine are log heater, puller, dummi block, loader, finish cut saw, stem, and table.
Identifikasi Non-Added Value Activity Dalam Proses Pemeriksaan Substantif Permohonan Paten Menggunakan Value Stream Mapping
Authors: Muslim Muslim , Ichwan Muhammad Nur , Ikatrinasar Ikatrinasar , Fitri Zulfa 
Published: August 2024

The process of substantive patent examination which is complicated and takes a long time is one of the reasons the inventor is "reluctant" to apply for a patent on his invention. This research was conducted using the Current State Value Stream Mapping (CSVSM) method, which began with the creation of a process flow map with the cycle time of each activity. It is known that most of the activities are value added activities. However, there is 1 activity that is required but not added value, namely the activity of verifying the technical field of application documents; and 1 non-value-added activity, namely initialing the Patent Granting letter. The number of waiting/delaying incidents is a waste in the process of substantive examination of patent applications caused by: (a) employees generally do double work; and (b) the absence of SOPs in each sub-process/sub-activity in the process of substantive examination of patent applications. Proposed improvements are submitted in the Future State Value Stream Mapping (FSVSM). As a result, lead-time can be reduced to 11 days, which was originally 26 days; and Process Cycle Efficiency which was originally 19.23% increased to 45.45%
Analisis Risiko Proyek Pada Konstruksi Bangunan: Tinjauan Literatur
Authors: Yudhaningsih Kuntisari , Hughes Vegit Risana , Fitria Febriola Nova , Sumawati Utami Diyan , Purba Humiras Hardi 
Published: August 2024

Risk is defined as an uncertain event or condition that, if it occurs, can have either a positive or negative effect on the project objectives. This effect can be avoided by using risk management methods, to identify risks, assessing risks either quantitatively or qualitatively, and choosing the appropriate method for handling risks will minimalized the effects. In the study, the scope was to identify the potential risk occurs on steel building work based on the previous research. Using sources based on the previous research, here will be identifying what types of risk factors are most commonly occurs for steel building work. The types of risk that will be discussed here will be divided into three types based on internal risk, external risk, and project risk. Each type of risk includes technical and non-technical risks. Based on the data this study identify that internal risk with technical aspects is the most common type of potential risk occurs on steel structure building work.
Analisis Manajemen Risiko pada Proyek Konstruksi Pelabuhan: Kajian Literatur Sistematik
Authors: Monalisa Monalisa , Amin Haidar Khoirul , Pratama Ardhani Agnas , Siswantoro Fery , Purba Humiras Hardi 
Published: August 2024

The development of an infrastructure in the region can have the effect of increasing people's access to resources so that the increase in productivity can encourage economic growth. Ports as sea transportation infrastructure have a very important and strategic role for industrial and trade growth and are business segments that can contribute to the economy and national development because they are part of the chain of transportation and logistics systems. For this reason, a risk analysis is needed so that the implementation of port construction can be completed on time, in terms of cost, quality and time. This study aims to analyze the risk of port construction using a systematic literature review method. Based on research results, risk in port construction projects is influenced by external non technical (22.807%), technical project (21.053%), external technical (21.053%), internal technical (18.421%), internal non technical (8.772%) and non technical project (7.895%).
Kajian Literatur Pada Identifikasi Risiko Pada Pemeliharaan Gedung
Authors: Naluri Nike , Purba Humiras Hardi 
Published: August 2024

Naturally there is no object made by humans that cannot be demagerd. and over time, there are many changes both physically and financially in the finished building but its useful life can be extended by carrying out regular repairs through an activity known as maintenance. . The purpose of this study was to determine the type of risk, location and year of research related to risks in building maintenance. The method used in this study is a literature review. 45 Journals obtained online from various sources with the keywords risk on building maintenance. From these journals, it can be concluded that the highest type of risk in building maintenance is internal technical risk and project technicality, where most research locations are carried out in Indonesia and the most research year is in 2020.
IMPLEMENTASI PENYIDIKAN TINDAK PIDANA ILLEGAL LOGGING DI WILAYAH KABUPATEN TOJO UNA UNA
Authors: Mardin Nurhayati , Haryanti Tuti , Nur Qalbi VIvi , Kharismawan Adiguna 
Published: August 2024

Deforestation is a phenomenon that needs to be addressed seriously to preserve the environment. One of the causes of deforestation is illegal logging activities in forest areas. The purpose of this research is to examine the impact of illegal logging, analyze the law enforcement process against illegal logging perpetrators and analyse obstacles in the implementation of law enforcement against illegal logging in Tojo Una-Una Regency. The research method uses empirical juridical research by using a conceptual approach and a case approach. This research concludes that the investigation of the crime of illegal logging in the Tojo Una-Una Regency area is carried out by Investigators at the Tojo Una-Una Police Station and Civil Servant Investigators of the Sulawesi Regional Environmental and Forestry Law Enforcement and Security Centre and obstacles in the implementation of law enforcement come from technical obstacles such as the difficulty of the terrain that must be traversed to reach the forest area, lack of facilities and infrastructure and lack of personnel at Tojo Una-Una Police Station and investigators of the Sulawesi Regional Environmental and Forestry Law Enforcement and Security Centre to carry out law enforcement duties against illegal logging crimes, as well as obstacles originating from the rule of law or legal substance, especially after the enactment of the Job Creation law.
PENDEKATAN RESTORATIVE JUSTICE DALAM PENYELESAIAN PERKARA TINDAK PIDANA PENCEMARAN NAMA BAIK DI MEDIA SOSIAL
Authors: Salamiah Salamiah 
Published: August 2024

Penelitian ini bertujuan untuk mengkaji penyelesaian tindak pidana pencemaran nama baik di media sosial melalui pendekatan Restorative Justice. Pencemaran nama baik di media sosial sudah menjadi fenomena yang marak di era digital saat ini. Dampak negatif pada tindakan tersebut bukan hanya merugikan korban, tapi juga dapat menimbulkan keresahan pada masyarakat. Dalam perkara ini pendekatan Restorative Justice (RJ) dapat menjadi sebuah solusi karena didalamnya memberikan suatu penawaran alternatif dalam menyelesaikan suatu perkara yang lebih fokus pada rehabilitasi dibandingkan retaliasi. Restorative Justice dapat memberikan solusi terbaik dalam menyelesaikan perkara pidana perdata antar perseorangan (natuurlijkepersonen) atau badan hukum (recht personen), yaitu dengan mengutamakan pokok permasalahan kejahatan tersebut. Hasil penelitian menunjukkan bahwa penyelesaian tindak pidana pencemaran nama baik melalui pendekatan restorative justice dapat menyeimbangkan perlindungan hak dan martabat seseorang sebagai konsep pemidanaan yang bertujuan untuk mencari cara untuk menegakkan sistem pemidanaan yang lebih adil dan seimbang.
Proyectos de Aprendizaje Servicio en la Universidad bajo el enfoque de Enseñanza en cadena y su proyección social
Authors: López Ruiz Manuel José 
Published: August 2024

Introducción: La enseñanza en cadena nos ofrece la oportunidad de formar simultáneamente a más de un grupo social. Las universidades disponen de metodologías activas para hacer realidad este tipo de experiencias formativas. Metodología: Este artículo presenta como, bajo el enfoque de aprendizaje servicio en cadena, el alumnado universitario diseña e implementa proyectos de alto valor social. Lo que pretende es favorecer una contribución social de la universidad a su entorno. El alumnado universitario, además de ejercer su papel discente, se convierte en un agente formador a la vez que asimila las competencias propias de la materia de estudio. Resultados: Los resultados evidencian las posibilidades de este tipo de actividades formativas, con una alta valoración por parte del alumnado implicado, un amplio despliegue competencial y con resultados académicos muy importantes y, sobre todo, un fortalecimiento del papel social de la universidad. Discusión: Se confirman los resultados obtenidos en otros proyectos desarrollados en otras universidades. Conclusiones: Desde el departamento creemos que esta debe ser la línea metodológica a seguir en años venideros.
Audit market concentration in an emerging economy
Authors: Dabor Alexander Olawumi , Wilson Osarodion Famous , Joy Osemwegie-Ero 
Published: August 2024

The aimed of this study is to ascertain the relationship between audit attributes and audit quality in an emerging economy. The study deliberately cover the post-Enron era and postaudit reforms era decipher the activities of audit after the demise of Enron. This study used selected quoted firms in Nigeria for a period of sixteen (16) years, 2006 – 2021. The models were built based on a study of extant literature, GOA and audit reforms. Ordinary least square econometric technique was employed to analyze data extracted from a secondary source. The outcomes of this study revealed that Audit client size has positive relationship with audit quality. The result further revealed that audit client complexity has negative relationship with audit quality. Finally, the result revealed that audit client business risk has no significant relationship with taudit quality. This study recommended that Alternative appointment processes for auditors, e.g. involving shareholder panels, or appointment by regulator.
A bibliometric review of sustainability and firm performance
Authors: Marchan Hannibal George 
Published: August 2024

What is the past, present and future trajectories of sustainability and firm performance? The study identified seminal works, current and future trends relevant to sustainability and firm performance. The research employed bibliometric analysis tools such as co-citation, bibliographic coupling, and co-occurrence analysis combined with enrichment tools. Utilizing a dataset that spanned from 1998 to 2023, it used Biblioshiny and analyzed 735 articles from Scopus. The research results showed a growth rate of 23 percent and an average of 37 citations per article. The research established stakeholder theory and theory of the firm as foundational pillar and latest developments focused on finance, corporate social responsibility, environmental assessment, and sustainability. Emerging trends involved sustainability performance, disclosures, internal factors, sustainability and firm performance, corporate social responsibility and governance, sustainability reporting and stakeholder engagement, and costs. Researchers and practitioners can utilize these findings to direct their work and contribute to the ongoing discourse in sustainability and firm performance research.
IMPLEMENTASI MARKET DAY UNTUK MENINGKATKAN NUMERASI DAN KEMANDIRIAN SISWA SEKOLAH DASAR MELALUI KM6
Authors: Septi Sami Damiana Theresia , Purnomo Sapto 
Published: August 2024

: Program kampus mengajar yang menjadi salah satu inisiatif terkemuka dalam mendorong peningkatan kualitas pendidikan di negeri ini telah memberikan kontribusi yang luar biasa. Dalam kampus mengajar angkatan 6 ini menawarkan kesempatan untuk menerapkan inovasi pendidikan khususnya melalui implementasi Market Day. Dari sini rumusan masalahnya adalah (1) Bagaimana program Market Day diimplementasikan dalam program kampus mengajar? (2) Bagaimana meningkatkan keterampilan numerasi dan kemandirian siswa melalui Market Day? Tujuan penelitian ini adalah untuk (1) Mendeskripsikan pelaksanaan Market Day di kelas dalam program kampus mengajar (2) Mendeskripsikan peningkatan kemandirian siswa melalui Market Day. Metode yang digunakan dalam program Market Day ini yaitu pendekatan kualitatif. Hasil penelitian menunjukkan bahwa pelaksanaan Market Day sebagai salah satu program di Sekolah Dasar dapat efektif dalam menanamkan karakter jiwa dan mental wirausaha pada siswa. Melalui kegiatan jual beli dalam Market Day, siswa dapat mengembangkan beberapa karakteristik wirausaha yang penting. Kegiatan Market Day dapat membangun karakter kewirausahaan kepada peserta didik diantaranya kreatif, inovatif, dan berorientasi pada masa depan, berani mengambil resiko, percaya diri, bertanggung jawab dan peduli, serta pandai mengelola keuangan. Karakter kewirausahaan ini dapat menumbuhkan jiwa kewirausahaan yang memotivasi minat peserta didik untuk menjadi seorang wirausahawan.
SOSIALISASI PENTINGNYA PEMBELAJARAN ETIKA UNTUK MEMBENTUK KARAKTER SISWA DI SDN 024 SAMARINDA UTARA
Authors: Afdal Afdal , Mayasari Renni , Steven Andi , Balan Viktor 
Published: August 2024

Abstrak: Pengabdian ini bertujuan untuk menggambarkan pentingnya pembelajaran etika untuk membentuk karakter sopan santun siswa SDN 024 Samarinda Utara.peserta pada sosialisasi ini adalah guru, kepala Sekolah, orang tua siswa dan siswa itu sendiri. Kegiatan ini dilakukan dengan melalui forum diskusi dan tanya jawab.Hasil menunjukan bahwa pembentukan karakter dan etika siswa sangatlah penting ditanamkan sejak dini, peran wali kelas dan orang tua juga sangat berpengaruh penting dalam maksimalkan pembentukan karakter dan etika siswa. Hal ini didukung dari hasil diskusi dan wawancara besama guru yang mengungkapkan bahwa perlu diingat pembentukan karakter dan etika siswa tidak dapat berkembang jika hanya di sekolah saja aka tetapi keluarga juga harus mengambil peran mengembangkan karakter anak, keluarga merupakan faktor penting dalam membentuk karakter siswa. kami memandang bahwa pendidikan karakter dan etika sangatlah berpengaruh penting atas prestasi siswa, dengan menyalurkan setiap nilai-nilai pendidikan karakter dan etika dalam proses pembelajaran siswa dengan perlahan akan memahami tentang pentingnya etika dalam kehidupan. Kata Kunci : Karakter Siswa, Pembelajaran Etika, Sosialisasi
PEMBUATAN PAKAN ALTERNATIF DENGAN MEMANFAATKAN BAHAN DARI POTENSI LOKAL DALAM PENINGKATAN PRODUKTIVITAS PERIKANAN
Authors: Julung Hendrikus , Ege Benediktus , Bustami Yakobus 
Published: August 2024

Abstrak:Melimpahnya sumber daya alam sebagai potensi lokal berupa limbah rumah tangga, limbah pertanian dan tumbuhan yang dapat dijadikan bahan pembuatan pakan ikan untuk memenuhi kebutuhan rumah tangga dan meningkatkan kesejahteraan masyarakat. Potensi tersebut belum dikelola dengan baik karena masyarakat kurang mengetahui nilai manfaatnya serta kurangan pengetahuan dan keterampilan untuk mengembangkan usaha perikanan dan pembuatan pakan alternatif dari bahan baku lokal, padahal peluang usahanya menjanjikan untuk meningkatkan pendapatan dan ekonomi masyarakat. Tujuan PKM ini adalah memberikan wawasan dan pengetahuan serta keterampilan kepada masyarakat tentang sumber daya lokal yang dapat dikelola menjadi pakan alternatif bagi ikan. Metode PKM yang digunakan berupa penyuluhan dan pelatihan. Hasil PKM ini bahan alternatif pembuatan pakan dari limbah rumah tangga seperti; air cucian beras, limbah sayuran, limbah buah-buahan dan dari limbah ertanian berupa dedak halus dari sekam serta limbah industri dan pasar seperti kepala ikan teri dan ampas tahu. Tumbuh-tumbuhan yang dapat dijadikan campuran bahan pakan seperti; Umbi-umbian, rebung, bongol pisang, kelor, kelapa, eceng gondok. Kata Kunci: Pakan Alternatif, Potensi Lokal, Perikanan.