bluuebunny/crossref_metadata_2025_split huggingface dataset:
SISTEM INFORMASI MANAJEMEN ASSET LABORATORIUM KOMPUTER PADA UNIT PELAKSANA TEKNIS (UPT) LABORATORIUM KOMPUTER UNIVERSITAS SERANG RAYA
Authors: Rendro Dwi Bayu , Suherman Suherman , Elvis Bayu Kerta 
Published: September 2022

Laboratorim komputer merupakan sarana yang digunakan oleh mahasiwa untuk melaksanakan kegiatan praktikum yang bertujuan untuk menunjang kegiatan belajar mengajar agar dapat menerapkan teori dan konsep yang didapatkan dalam perkuliahan. Alat dan bahan merupakan salah satu unsur penting pada laboratorium komputer yang menunjang kegiatan praktikum. Agar alat dan bahan memiliki proses administrasi yang baik maka perlu adanya pengelolaan seperti pencatatan administrasi, pendataan barang, penempatan barang serta pelaporan. Unit Pelaksana Teknis (UPT) laborarotium komputer merupakan divisi yang bertanggung jawab dalam hal pengelolaan alat dan bahan penunjang praktikum. Untuk mendukung kegiatan ini agar berjalan optimal maka diperlukan aplikasi yang dapat memudahkan pengelolaan data barang. Rancangan sistem dalam penelitian ini menggunakan model manajemen asset dalam memenuhi kebutuhan fungsi aplikasi. Penelitian ini menghasilkan aplikasi sistem informasi berbasis web dengan akses data yang baik sehingga dapat melakukan pendataan asset dalam jumlah banyak, penempatan asset, perbaikan asset,riwayat perbaikan asset serta laporan asset berdasarkan sortir kebutuhan yang lebih mudah dengan data yang akurat.

Kata kunci : sistem informasi, laboratorium komputer, manajemen asset.
PERANCANGAN PENGENDALI LAMPU KANTOR BERBASIS INTERNET OF THING
Authors: Shafitri Adhe , Suhardianto  , Mashuri Acep , Aditya Aditya 
Published: September 2022

Perancangan Alat Pengendali Penerangan Lampu Kantor Berbasis Internet Of Things (Studi kasus Di Kantor Perwakilan Bank Indonesia Provinsi Banten), dengan menggunakan google assistant dan adafruit.io berbasis nodemcu esp8266. Di zaman teknologi yang berkembang ini automasi pengendali sangat di butuhkan, dikarenakan dapat mengontrol dan mengendalikan perangkat elektronik dengan mudah dan lebih efisien.Permasalahan yang dihadapi oleh Kantor Perwakilan Bank Indonesia Provinsi Banten yaitu masih menggunakan sistem manual pada saklar tombol tekan on/off untuk mengoperasikan lampu dan kurangnya pemanfaatan perangkat teknologi seperti relay, nodemcu esp8266 dan internet service provider. Berkenaan dengan itu penulis berusaha memanfaatkan perangkat teknologi dan merancang sebuah alat yaitu automasi pengendali lampu kantor di Kantor Perwakilan Bank Indonesia Provinsi Banten. Dalam laporan KKP ini akan dijelaskan tentang perancangan yang dilakukan sampai hasil akhir automasi pengendali lampu kantor di Kantor Perwakilan Bank Indonesia Provinsi Banten, sehingga dapat diterapkan dan dijadikan referensi untuk masa yang akan datang
Implementasi Gaya Kepemimpinan dan Beban Kerja terhadap Produktivitas Kerja Karyawan (Studi Kasus PT. Astra Otoparts Tbk. Cibinong)
Authors: Lestari Nurlaela Eva Puji 
Published: September 2022

Abstrak - Yang melatarbelakangi penelitian ini terakit dengan gaya kepemimpinan, beban kerja serta produktivitas yang ada di Perusahaan. Penelitian ini bertujuan untuk menganalisis variabel X1 (Gaya Kepemimpinan), X2 (Beban Kerja) dan variabel Y (Produktivitas Kerja). Populasi dalam penelitian adalah karyawan Divisi WINTEQ, PT Astra Otoparts Tbk, yang beralamat di Jl. Raya Bogor Km 47, Cibinong, Bogor. Sampel yang diambil pada penelitian ini yaitu berjumlah 72 karyawan dengan simpel random sampling. Dalam penelitian ini, menggunakan metode penelitian yaitu metode analisis regresi linier berganda (multiple). Kesimpulan yang didapat dari penelitian ini, bahwa Gaya Kepemimpinan, beban kerja mempunyai pengaruh terhadap produktivitas kerja karyawan. Variabel lain yang tidak diteliti dalam penelitian ini seperti lingkungan kerja, disiplin kerja, motivasi dan lain sebagainya. Hal ini menandakan bahwa perusahaan harus fokus pada gaya kepemimpinan, beban kerja agar produktivitas kerja karyawan tetap bisa meningkat.Kata Kunci: Gaya Kepemimpinan, Beban Kerja, Produktivitas Kerja
Effects of Powder Feedstock Pre-Heating on Polymer Cold Spray Deposition
Authors: Bacha T. W. , Brennan D. A. , Tiitma Ü. , Haas F. M. , Stanzione J. F. 
Published: September 2022

Abstract
The feasibility of processing various polymers by cold spray has been exemplified by depositions with low porosity and properties comparable to the bulk material. However, cold sprayed polymers are generally deposited with low deposition efficiency compared to more extensively studied metal sprays. Low efficiencies in polymer sprays are attributed to characteristic differences in material properties between metals and polymers. Notably, the thermophysical properties of polymers limit heat transfer and promote intra-particle thermal gradients that develop during cold spray processing. These properties (e.g., thermal conductivity, heat capacity, density) and low deposition efficiencies demand alterations to the cold spray process equipment outside typical metal powder spray conditions. Herein, a modified powder feed tube is used to pre-heat powder to temperatures (~84 °C) below the powder melting point, or cool it (~-55 °C) below room temperature before contacting the high velocity carrier gas in the nozzle of a CSM 108 cold spray system. Numerical simulation demonstrated that pre-heating/cooling the powder feedstock is a viable means of adjusting particle temperature upon impact with the substrate; however, this technique has generally not been deliberately utilized in the cold spray of polymers. In the present work, no significant increase in deposition efficiency (~65% for all sprays) was found by increasing the pre-heat temperature. However, pre-heated particles had a mechanical strength 28% higher than particles injected at room temperature and -55 °C. Despite this, scanning electron microscope images indicated no notable differences between the deposit microstructures. Future works are planned to study the effect of pre-heat at higher particle impact velocities and degrees of pre-heat to improve powder consolidation.
Aerosol Deposition of BiVO4 Films for Solar Hydrogen Generation
Authors: Elsenberg A. , Emmler T. , Schieda M. , Gärtner F. , Klassen T. 
Published: September 2022

Abstract
Due to its suitable semiconductor band gap energies and associated visible light absorption, bismuth vanadate offers high photon efficiencies in solar photo-anodes, enabling green hydrogen generation in photoelectrochemical water splitting cells. Respective bismuth vanadate films have to ensure high efficiencies in electron / hole pair generation, and sufficiently high rates of charge transfer, for both, electrons to the conducting substrate, as well as holes to the electrolyte. Thus, tuning of coating properties has to aim for high phase purity and good layer integrity. So far, respective films are mainly produced by thin film techniques, but at rather high costs and low deposition rates. Less costly processing routes are opened by thermal spraying or sol-gel techniques, however, these cannot guarantee the required phase purity or absence of remnants from the binder. As solid state and binderless alternative, Aerosol Deposition (AD) offers several advantages: comparative low costs, high deposition rates, no undesired phase transformations, and no impurities or residues that could reduce the photoelectrochemical activity. Under the scope of this research on photo-electrochemically active bismuth vanadate films, powder sizes were tailored by milling, and spray parameter sets like the process gas pressure were varied, in order to elucidate their influence on microstructure and application properties. Covering a wide parameter range in aerosol deposition allowed for the development of a window of deposition. Most promising combinations for layer build-up were derived. The results on stainless steel substrates were transferred to FTO-coated glass substrates, as needed in backlit cell layouts. For fine tuning of maximum photocurrents, layer thickness and conductivity were then systematically adjusted. Homogeneous large-scale prototypes demonstrate that aerosol deposition is suitable for processing layers for solar energy harvesting.
Thermally Sprayed Al2O3 Ceramic Coatings for Electrical Insulation Applications
Authors: Junge P. , Rupprecht C. , Greinacher M. , Kober D. , Stargardt P. 
Published: September 2022

Abstract
Thermal spraying enables a fast and effective way to additively deposit various ceramics as electric insulators, which are used in conditions where polymers are not suitable. Alumina (Al2O3) is among the most widely employed materials in the coating industry because it exhibits good dielectric properties, high hardness, and high melting point, while still being cost-effective. Various parameters (e.g., feedstock type, plasma gas mixture, plasma power) significantly influence the resulting coating in terms of microstructure, porosity, crystallinity, and degree of unmolten and molten particles. As a consequence, these parameters need to be investigated to estimate their impact on the electrical insulating properties of thermally sprayed alumina. This study focuses on the development of a novel electric insulation coating from Al2O3 feedstock powders deposited via atmospheric plasma spray (APS). The microstructure, porosity, and corresponding crystallographic phases have been analyzed with optical microscopy, XRD, and SEM images. To achieve an understanding of the parameters influencing the electrical insulation performance of the manufactured coatings, an in-depth analysis of the fundamental dielectric parameters (e.g., DC resistance, breakdown strength, dielectric loss tangent, and permittivity) is presented.
The Numerical Analysis of Plasma Sprayed YSZ Particles Behavior in the Microtextured Substrate Boundary Layer
Authors: Kiełczawa T. , Sokołowski P. 
Published: September 2022

Abstract
In this work, the possibility of controlling the thermally sprayed TBC microstructure is in order to improve the overall TBC system performance. The control is possible primarily by metallic bond coat surface microtexturization prior to ceramic top coat spraying. Such pretreated bond coat was modeled to investigate the influence of the substrate topography on the plasma stream behavior as well as the feedstock particle thermophysical properties and trajectories in the substrate closest proximity. The microscale computational domain was considered here. It was extracted from entire spraying domain and located in the microtextured substrate boundary layer. Then, advanced flow models were introduced to the governing equations to define heat flux to the substrate, turbulent flow, and plasma jet / feedstock droplets interaction. Feedstock discrete phase was defined by the means of Discrete Phase Model (DPM) including particle drag laws and DPM source modelling. The motivation for this study was to model and investigate the influence of the bond coat microtexturization on the behavior of the feedstock particles in the substrate boundary layer. This opens the possibility of better understanding the TBC build-up mechanism and strictly controlling the microstructure of such TBCs.
A Novel Method of Fabricating Water-Cooled Heat Sinks with Complex Internal Structures Using Wire-Arc Spray
Authors: Palumbo J. , Chandra S. 
Published: September 2022

Abstract
Miniaturization and performance improvements of electronic devices in recent decades have significantly increased heat dissipation rates. To overcome this, researchers have developed heat sinks with miniature fluid channels to maintain small device footprints with increased heat transfer performance. These channels are often fabricated using either subtractive fabrication methods, such as etching or micro-milling, or additive methods such as direct metal laser sintering (DMLS). These methods are limited by their long processing times, low geometric accuracy, or high cost. To overcome these limitations, a novel additive manufacturing method is developed using twin wire-arc spray. Wire-arc spray was used to build complex aluminum structures with length scales varying from 0.5 mm to 74 mm. Surface structures were built on a metal plate by spraying aluminum through a 3D printed polymer mask. Internal flow passages were made by filling surface channels with a water-soluble polyvinyl alcohol (PVA) paste that was allowed to harden, spraying metal over it, and then dissolving the PVA. The influence of wire-arc spray process parameters, such as standoff distance and scanning speed, on coating solid PVA with aluminum, were also investigated.
Effect of Thermal Shrinkage on the Dynamics of Droplet Impact in a Thermal Spray Process
Authors: Morteza Javid S. , Pershin L. , Mostaghimi J. 
Published: September 2022

Abstract
During the impact and solidification of thermal spray droplets on a substrate, the density increases when the droplet solidifies. Depending on the material, the changes in density could be significant. For example, aluminum oxide's density changes by 66%, while the changes are 12% and 19% for nickel and copper, respectively. For zirconia, this change is 24%. The effect of such densification on the dynamic of the droplet impact and the formation of porosity could be dramatic. In this study, the effect of shrinkage of a molten droplet during solidification on droplet impact is numerically investigated for several materials. Results for the impact of molten alumina, nickel, copper, and zirconia droplets on both smooth and rough surfaces are presented. The results of variable density cases are compared with those assuming constant density. The effect of thermal shrinkage is particularly vital in the interaction of two impacting droplets. The shrinkage promotes the formation of additional pores.
Measurement Routine for Analysing the Thermal Impact of Additive Manufacturing Processes on Deformation
Authors: Mäde K. , Oster L. , Bold M. N. , Reisgen U. , Schleifenbaum J. 
Published: September 2022

Abstract
Additive Manufacturing processes such as laser metal deposition (LMD) are often used in repairing processes where material is deposited onto existing components. During the LMD process, thermal stresses and deformations of the substrate can occur. This deformation results from a multitude of effects throughout the manufacturing process. To precisely measure the time-temperature-deformation history, an experimental setup combining in situ deformation measurement and thermography is conceived. 3D deformations are measured using a stereo camera system observing a stochastically distributed speckle pattern applied on the surface of the substrate. Additionally, the temperature is measured on the underside of the substrate by means of thermal camera. Material is applied using LMD on the opposite side of the measurement therefore there is no chance of the laser beam interfering with the optical measurement of temperature and deformation or damaging the measurement equipment. Due to the areal nature of the measurement system chosen, it is possible to achieve high temporal and spatial resolution to identify critical heat distributions and welding path strategies, which lead to deformation. This work proposes a novel measurement setup and provides possible use cases for optimizing path planning during additive manufacturing processes based on three exemplary path geometries.
Stripping of Thermal Sprayed Oxide Coatings by Means of Laser Techniques, Water Jet and a Newly Developed Hybrid Method
Authors: Staschik M. , Rupprecht C. , Röhricht M.-L. , Kuche Y. , Uhlmann E. 
Published: September 2022

Abstract
Many industrial applications require efficient stripping methods for thermal spray coatings, especially when cost-intensive substrate materials are utilized. A typical example is turbine components such as rotor blades with thermal barrier coatings (plasma-sprayed YSZ) in combination with nickel-based bond coatings. Unfortunately, the conventional stripping methods are dirty (contamination with grid blasting material), environmentally harmful (aggressive fluids, strong acid), or relatively ineffective (high tool load in mechanical milling). In order to avoid these disadvantages, alternative techniques such as removal by laser or by water jet stripping and hybrid methods, such as ultrasonic-based mechanical methods and a combination of water, laser, and cryo-techniques have been investigated. In this paper, newly developed stripping methods are compared to classic techniques. The evaluation considers user-friendliness, technological performance such as substrate-interaction, material emission, and economic considerations.
Development of a Low Power Plasma Reactor for the Local Deposition of YSZ Thermal Barrier Coatings at Atmospheric Pressure
Authors: Segondy S. , Rio C. , Landais S. , Guyon C. , Rousseau F. 
Published: September 2022

Abstract
Repair methods are of great interest to the aeronautic industry, especially for turbines. Deposition techniques that can quickly and easily repair small localised areas of damage in Thermal Barrier Coatings (TBCs) on combustion chambers could be financially worthwhile. In a first approach, a Low-Power Plasma Reactor (LPPR) operating at low pressure (&lt; 1000 Pa, 240 W) was tested to locally deposit effective Yttria partially Stabilised Zirconia (YSZ) as TBC; however, a vacuum chamber would be more difficult to implement on an industrial scale. For this reason, a new LPPR (&lt; 1 kW) operating at atmospheric pressure with solution precursors was investigated. The precursors were injected in the plasma afterglow to be sprayed and deposited onto parts of combustion chambers. As the afterglow temperature was cooler than for most thermal spray processes, spray distance was less than 10 mm. As such, YSZ deposition could be performed locally in hard-to-reach areas. YSZ coating characteristics were studied by FTIR and SEM analyses. For example, YSZ coatings exhibited the expected stoichiometry, a precursor conversion of 98 mol%, good adherence, and a porosity evaluated at approximately 30 vol%. In addition, YSZ coating thickness could be greater than 200 μm.
Enhancing the Wear Resistance of the Medium-Entropy Alloy CrFeNi by Minor Alloying Constituents of BSiC for Surface Protective Coatings by Thermal Spraying
Authors: Lindner T. , Preuß B. , Löbel M. , Rymer L.-M. , Hanisch N. , Lampke T. 
Published: September 2022

Abstract
The adaptation of medium-entropy alloys (MEAs) by minor alloying constituents allows a targeted modification of the property profile of this material class for surface protection applications. In the present work, the potential of BSiC additions in the MEA system CrFeNi as base for adapted feedstock materials for thermal spraying is investigated. The alloy development was carried out in an electric arc furnace. Compared with the initial alloy, a significant increase in the wear resistance of the castings was demonstrated for the adapted alloy composition. Subsequently, powder was produced and characterized by inert gas atomization, followed by processing via high velocity oxy-fuel (HVOF) spraying. The tribological behavior was evaluated comparatively for all manufacturing variants considered. A good agreement in the property profile was determined, confirming the basic alloy development approach based on metallurgical processes. The evaluation of the process-structure property relationships confirms the great potential of adapted alloy systems for complex alloys in the field of surface engineering.
Interparticle Bonding and Interfacial Nanocrystallization Mechanisms in Cold Sprayed Metallic Glass
Authors: Fan N. , Huang C. , Yu P. , Chen W. , Lupoi R. , Liu L. , Yin S. 
Published: September 2022

Abstract
In this work, amorphous Zr-based bulk metallic glass deposit was manufactured by cold spray. The bonding mechanism of metallic glass particles was systematically investigated through studying the deformation behavior of individual particles after deposition or rebound. We revealed two collective particle bonding mechanisms that contributed to the formation of metallic glass deposit, i.e., high-velocity impact induced localized metallurgical bonding at the fringe of interface, and high gas-temperature induced partial melting of particles and resultant annular metallurgical bonding band. Moreover, the dynamic evolution mechanism of amorphous phase into nanocrystal structures at severely deformed interfacial regions during cold spray was carefully investigated. For the first time, we observed different amorphous/nanocrystal structures in cold sprayed metallic glass particles, which can represent different evolution stages in nanocrystallization process. Based on the observation, it is inferred that the nanocrystallization process can be divided into following three stages: composition segregation, the formation of ordered 1D and 2D transition structures, and 3D nanocrystals. The current study provides new insights into bonding mechanisms and the mechanistic nanocrystallization origins in cold sprayed metallic glass.
Influence of Microstructure on Hardness and Electric Resistivity of Flame-Sprayed High Entropy Alloy Coatings
Authors: Pal S. , Bhaskaran Nair R. , McDonald A. 
Published: September 2022

Abstract
High entropy alloys (HEAs) are classified as a new class of advanced metallic materials that have received significant attention in recent years due to their stable microstructures and promising properties. In this study, three mechanically alloyed equiatomic HEA coatings – AlCoCrFeMo, AlCoCrFeMoW, and AlCoCrFeMoV – were fabricated on stainless steel substrates using flame spray manufacturing technique. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and Vicker’s microhardness were utilized to characterize the fabricated HEA coatings. Furthermore, Joule heating experiments using a modified version of a two-probe test was used to measure the electrical resistivity of the HEA coatings. To prevent short-circuiting of the metallic coatings, a thin layer of alumina was deposited as a dielectric material prior to the deposition of HEA coatings. The microstructure of the HEA coatings showed the presence of multiple oxide regions along with solid-solution phases. The porosity levels were approximately 2 to 3% for all the HEA coatings. The HEA coatings had a thickness of approximately 130 to 140 μm, whereas the alumina layer was 120 to 160 μm thick. The electrical resistivity values were higher for all the HEA coatings compared to flame-sprayed Ni-20Cr and NiCrAlY coatings and AlCoCrFeNi HEA thin film, which may be attributed to the characteristics of HEAs, such as severe lattice distortion and solute segregations. The combined interaction of high hardness and increased electrical resistivity suggests that the flame-sprayed HEA coatings can be used as multifunctional wear-resistant materials for energy generation applications.