bluuebunny/crossref_metadata_2025_split huggingface dataset:
On the Influence of Powder Feed Structure on Wear Properties of HVOF Sprayed WC/Co Hardcoatings
Authors: Skandan G. , Jain M. , Fischer T.E. , Kear B.H. , Rigney W.R. , Shropshire R. , Brunhouse S. 
Published: July 2021

Abstract
This paper compares the wear properties of HVOF-sprayed WC/12Co hardcoatings produced from different powder feedstock materials, including conventional, nanophase, and mixed powders. The mixed or multimodal feed powder is designed to minimize the amount of material that goes through a high temperature cycle during spraying, thus potentially limiting the extent of decarburization in the resulting coating. As will be shown, decarburization is indeed minimal in a multimodal coating, which translates into exceptional resistance to abrasive and sliding wear. Another favorable factor is the ability to increase the volume fraction of hard WC phase in such a coating, thereby further enhancing its wear resistance.
Some Aspects of the Erosion and Corrosion Behavior of a WC-Co-Cr HVOF Sprayed Coating
Authors: Perry J.M. , Hodgkiess T. , Neville A. 
Published: July 2021

Abstract
This paper describes and discusses aspects of the erosion-corrosion behaviour of a WC-Co-Cr, HVOF sprayed coating when subjected to an impinging jet of an aqueous solution of 3.5% NaCl containing solid particles at 18°C. Although pure mechanical erosion has been found to contribute to a large part of material degradation, a considerable amount of material loss can be attributed to the direct and indirect (synergy) effect of corrosion. Aspects of the influence of time, solids loading and impingement angle have been investigated and the mechanisms of erosion-corrosion are discussed.
An Overview of Compressor Abradables
Authors: Schmid R.K. , Ghasripoor F. , Dorfman M. , Wei X. 
Published: July 2021

Abstract
Very many gap-sealing products are now available for use in the compressor section of gas turbines. This paper attempts to give an overview of these and where they are best used. Data is presented for abradability, erosion resistance and application technique. By explaining how abradables function tribologically it is hoped that selection will be simpler for designers. New products are introduced as well as the way forward described. It is shown how with time the diversity of application techniques has decreased with thermal spraying becoming the preferred technique, and that abradables are now available to run against titanium blading up to 600°C.
Cavitation Resistant Thermal Spray Coatings on Diesel Engine Parts
Authors: Borisov Y. , Bogush V. 
Published: July 2021

Abstract
This work is devoted to the study of peculiarities of thermal sprayed coatings behavior under conditions of cavitation, as well as the elaboration of compositions of cavitation-resistant coatings and technology for their application with the aim of engine cylinders sleeves protection from cavitation-erosion destruction. The methods of arc metallization, flame and plasma spraying were used for coatings deposition. Powders of metal alloys and oxides, mechanical mixtures of nickel alloys with carbides, wires and flux-cored wires were applied as materials for thermal spraying. Method of magneto-striction vibration was used to determine the coatings cavitation resistance. A correlation between a bond strength of coatings and the character of their cavitation destruction was established. The best results were obtained in the case of using stainless steel wires and flux-cored wires using. Resistance of coated diesel engines sleeves was increased 1.6 times in comparison with sleeves without coatings. Semi-automatic line for arc metallization of diesel sleeves with a production of 600,000 sleeves per year was designed, build up and put into operation.
On the Experimental Correlation Between Plasma Spray Process Conditions and Yttria Partially Stabilized Zirconia Coatings Properties
Authors: Scrivani A. , Bardi U. , Antolotti N. , Bertini S. , Groppetti R. 
Published: July 2021

Abstract
Thermal spray deposited Zirconium oxide (or Zirconia, ZrO2) is used in several industrial sectors for various purposes: as thermal barrier for turbine blades, as wear and corrosion resistant coating in industrial applications as well as biomedical applications. This paper reports the results of a study aimed at determining the relation between the plasma spray process conditions and the coating properties. A 24-1 fractional factorial Design of Experiments has been used and the coatings have been characterised in terms of chemical composition, crystal lattice structure and mechanical properties (morphology, porosity, roughness, hardness). Coatings with different characteristics have been obtained depending on the spray parameters combination. We found that it is possible to vary the spraying parameters in such a way to obtain dense, compact Yttria Partially Stabilised ZrO2 deposits which can be useful as wear and corrosion resistant coatings. In other conditions less dense and more porous layers can be obtained, useful for thermal barrier applications.
Optimization of the Characterization of Thermal Spray Coatings
Authors: Begon V. , Baudoin J. , Dugne O. 
Published: July 2021

Abstract
Thermal Barriers Coatings (TBC) are mass-produced in several industrial fields: aeronautic, automotive or energetic industries. All production requires the same constant level of fest and reproducible quality control at the lowest cost. The metallographic process is the primary way to evaluate thermally sprayed coatings but it must be both highly very repeatable and fast, especially when metallography is used to keep the production at a constant level. Therefore the management and the organization of a metallographic laboratory is of prime importance in order to reduce the cost and to provide a quality structure. The present approach to the whole chain of characterization is based on the user's point of view. Generally speaking, metallographic control of widely used parts often seems to be considered to be an uninteresting and obtuse subject, since it has been in practice for so long. Despite the lack of the prestige associated with the subject, optimization of an appraisal post can provide very concrete and more importantly profitable, results.
Thermal Effects on the Structure and Characteristics of Plasma Sprayed Self-Fluxing Alloys
Authors: Bertrand G. , Malavolta C. , Tourenne F. , Hansz B. , Coddet C. , Gourlaouen V. 
Published: July 2021

Abstract
In general, thermal spraying involves high temperatures that can be deleterious for the microstructure and deformation of the substrate. As a consequence, the use of a cooling system during spraying is often necessary. Meanwhile, in some cases, a too low surface temperature can induce a loss of properties, in particular concerning adherence and coating density. Therefore, it would be sometimes interesting to combine pre-heating and cooling stages with the plasma spray. A specific process, named HeatCool, was developed and patented to ensure a precise control of the temperature at the spraying location. The present work was focused on the study of the influence of pre-heating and cryogenic cooling conditions on the microstructure and mechanical characteristics of NiCrFeBSi self-fluxing alloy deposited by d.c. plasma spray technique. Firstly, a comparison between air and CO2 cooling was conducted to assess the efficiency corresponding to the specific use of cryogenic CO2. The main characteristics studied were the microhardness, roughness, porosity, mechanical deformations, morphology and crystallographic structures. Optimising the cooling methods and conditions combined with the process parameters improved microhardness of the plasma sprayed metal alloy and induced lower strain deformation of the substrate. Secondly, the pre-heating system was added to the device and the HeatCool process was evaluated. The process was demonstrated to be an efficient mean to enhance the structural and mechanical characteristics of coatings made of self-fluxing alloy.
INFLUENCE OF LIGHT ABSORPTION PROFILE ON THE PERFORMANCE OF ORGANIC PHOTOVOLTAICS
Authors: Mohamed Abdul Halim Ikram , Inche Ibrahim Mohd Lukman 
Published: July 2021

We investigate how an enhanced light absorption at a specific position inside the active layer affects the performance of organic photovoltaic cells (OPVs), namely the short-circuit current density ( ), the open-circuit voltage ( ), the fill factor (FF), and the power conversion efficiency (PCE). The performance is calculated using an updated version of a previously published analytical current-voltage model for OPVs, where the updated model allows the light absorption profile to be described by any functions provided that analytical solutions can be produced. We find that the light absorption profile affects the performance through the drift current. When the mobility imbalance is not very high (when the ratio of the mobility of the faster carrier type to the mobility of the slower carrier type is less than about ), the PCE is maximized when the light absorption is concentrated at the center of the active layer. When the mobility imbalance is very high (when the ratio of the mobility of the faster carrier type to the mobility of the slower carrier type is more than approximately ), the PCE is maximized when the light absorption is concentrated near the electrode collecting the slower carrier type. Therefore, it is important to ensure that the light absorption profile is properly tuned so that the performance of OPVs is maximized. Moreover, any efforts that we make to improve the performance should not lead to a light absorption profile that would actually impair the overall performance.
ABSTRAK: Kajian ini menilai bagaimana penyerapan cahaya yang tinggi pada bahagian tertentu lapisan aktif mempengaruhi prestasi sel fotovoltaik organik (OPV), iaitu ketumpatan arus litar pintas (Jsc), voltan litar terbuka (Voc), faktor pengisian (FF), dan kecekapan penukaran kuasa (PCE). Prestasi dikira mengguna pakai model terkini yang diperbaharui dari model asal analitikal OPV voltan-arus, di mana model ini membenarkan mana-mana profil penyerapan cahaya digunakan asalkan penyelesaian analitikal terhasil. Dapatan kajian mendapati profil penyerapan cahaya mempengaruhi prestasi berdasarkan arus hanyut. Apabila ketidakseimbangan pergerakan caj tidak begitu tinggi (di mana nisbah pergerakan pembawa caj laju kepada perlahan adalah kurang daripada 103), PCE menjadi maksimum jika penyerapan cahaya bertumpu pada tengah lapisan aktif. Apabila ketidakseimbangan pergerakan caj sangat tinggi (di mana nisbah pergerakan pembawa caj laju kepada perlahan adalah lebih daripada 104), PCE menjadi maksimum jika penyerapan cahaya bertumpu pada elektrod yang mengutip pembawa caj perlahan. Oleh itu, kedudukan talaan profil penyerapan cahaya yang tepat adalah sangat penting bagi menentukan prestasi OPV dimaksimumkan. Tambahan, apa sahaja usaha penambahbaikan prestasi seharusnya tidak menyebabkan pengurangan keseluruhan prestasi profil penyerapan cahaya.
Contextual advertising is an effective tool of digital marketing
Authors: Nosenko Yu. М. , Lukyanchuk L. V. , Sinelnik L. M. 
Published: July 2021

The concept of contextual advertising, its strengths, main types are defined. Types of advertising campaigns are defined. Highlighted the basic settings in Google Ads, in particular the rules of keyword selection. The effectiveness of using contextual advertising as an Internet marketing tool has been established, given that it: acts selectively and is displayed to visitors of the website whose sphere of interests potentially coincides / intersects with the subject of the advertised product or service; meets the requirements of the target audience, which increases the likelihood of its response to advertising and makes it more attractive than other types of advertising; helps to improve the company's image, disseminate information about products and sell goods over the Internet; is an effective element of digital marketing, which with a high-quality setting can increase company revenues. Contextual advertising has prospects, given: -	increasing the number of Internet users and the time of its use by each user; -	its regional orientation, which allows you to weed out a lot of non-target customers; -	focus on a specific target audience by interests; -	ofline advertising is becoming more expensive; -	contextual advertising tools are improving, more services are appearing for a deeper analysis of statistics. When setting up contextual advertising, the following are important: choosing the type of advertising campaign (image, product, trade), searching for keywords and choosing the type of correspondence (general matching, broad match modifier, phrase matching, exact matching). Effective contextual advertising is a chain of "request -> keyword -> advertisement -> landing page of the site-> purchase of goods". Keywords: digital marketing, search engine, contextual advertising, advertising campaign, demand, keywords.
PENGARUH KEPEMIMPINAN KERJA DAN LINGKUNGAN KERJA TERHADAP TURNOVER INTENTION KARYAWAN PADA PT VANISA RIZKI JAKARTA SELATAN
Authors: Amni Hayati Feb , Chasanah Uswatun , Surya Ningsih Anis 
Published: July 2021

Penelitian ini bertujuan untuk mengetahui pengaruh kepemimpinan kerja dan lingkungan kerja terhadap Turnover Intention karyawan pada PT Vanisa Rizki di Jakarta Selatan baik secara parsial maupun simultanMetode yang digunakan dalam penelitian ini yaitu metode diskriptif kuantitatif, yaitu metode penelitian yang memberikan gambaran mengenai suatu masalah yang terjadi pada saat penelitian berlangsung, meliputi data yang dikumpulkan, kemudian dibahas, diolah dan dianalisis, sehingga dapat dicari alternatif pemecahan masalahnya. Metode pengumpulan data yang dilakukan dalam penelitian ini diantaranya observasi dan penyebaran kuesioner atau angket. Sampel yang digunakan dalam penelitian ini adalah teknik sampel jenuh, yang merupakan teknik penentuan sampel apabila semua anggota populasi digunakan sebagai sampel. Anggota populasi sebagai responden dengan jumlah karyawan pada PT. Vanisa Rizki yang berjumlah 50 orang.Berdasarkan hasil perhitungan secara parsial antara kedua variabel bebas yang masing masing memiliki hasil sebagai berikut : tidak terdapat Pengaruh Kepemimpinan Kerja terhadap Turnover Intention Karyawan pada PT. Vanisa Rizki dengan perhitungan t hitung = 0,614 < t tabel = 2,012 yang diperoleh taraf signifikasi (α) sebesar 0,542 > 0,05 maka Ho1 diterima dan Ha1 ditolak. Selanjutnya terdapat Pengaruh antara Lingkungan Kerja terhadap Turnover Intention Karyawan pada PT. Vanisa Rizki dengan perhitungan t hitung = 11,860 > t tabel = 2,012 yang diperoleh taraf signifikasi (α) sebesar 0,000 < 0,05 maka Ho2 ditolak dan Ha2 diterima. Berdasarkan analisis hasil perhitungan data pengaruh antara variabel bebas Kepemimpinan Kerja (X1) dan variabel Lingkungan Kerja (X2) terhadap variabel terikat Turnover Intention Karyawan (Y) pada PT. Vanisa Rizki ditujukkan pada regresi linier berganda Y = 6,377 + 0,064 X1 + 0,761 X2, koefisien r = 0,866, nilai koefisien Adjusted R square R = 0,750 atau 75% dan nilai F hitung = 70,361 > nilai F tabel = 3,19. Sehingga dapat diartikan terdapat Pengaruh yang signifikan antara Kepemimpinan Kerja (X1) dan Lingkungan Kerja (X2) terhadap Turnover Intention Karyawan pada PT. Vanisa Rizki Jakarta Selatan.
RANCANG BANGUN DESTILATOR AIR LAUT SKALA RUMAH TANGGA UNTUK DAERAH PESISIR
Authors: Setiyono Joko , ’Atifah Nailul , Solihat Ihat 
Published: July 2021

Abstrak: Dalam penelitian ini dilakukan perancangan destilator air laut skala rumah tangga. Destilator yang dirancang terdiri dari yaitu evaporator dan kondenser. Sumber panas untuk evaporator adalah panas dari hasil pembakaran gas LPG. Uap air yang dihasilkan dari evaporator tersebut kemudian dialirkan menuju bagian kondenser melalui bagian dalam pipa tembaga yang berbentuk spiral. Sedangkan di bagian luar pipa kondenser, dialirkan air pendingin dengan bantuan pompa kecil berdaya 12 Watt dengan debit air sebesar 0,169 L/s. Akibat proses pendinginan ini, uap air mengalami kondensasi, yaitu proses perubahan dari fase uap menjadi fase cair berupa air tawar. Penelitian ini merupakan studi awal yang bertujuan untuk mengetahui bagaimana unjuk kerja sistem destilator ini jika ditinjau dari 2 aspek yang meliputi laju produksi air tawar dan kebutuhan energi yang dibutuhkan. Hasil penelitian ini menunjukkan bahwa laju produksi air tawar rata- rata dari sistem ini adalah sebesar 37,69 Liter/hari dan besarnya kebutuhan energi total dari sistem ini adalah sebesar 762,48 kWh/m3.Kata kunci: rancang bangun,destilator, air laut, air tawar. unjuk kerja, laju produksi, kebutuhan energi
ANALISA KERUSAKAN STUD BOLT TURBIN UAP 300 MW DAN UPAYA PENCEGAHANYA
Authors: Santosa Heru 
Published: July 2021

Fungsi Stud Bolt adalah untuk mengikat casing atas dan casing bawah pada turbin uap 330 MW, bekerja pada temperatur ± 538° operasi terus menerus 24 jam dan sudah beroperasi selama ± 25 tahun. Kerusakan yang terjadi mengalami patah dan retak padaleher ulir stud Bolt.Jika kerusakan diabaikan, maka uap dalam turbin tidak akan berjalan semestinya. Analisa pengkajian penyebab utama terjadinya kerusakan melalui beberapa pengujian fraktografi, metalografi, uji kekerasan,uji SEM, komposisi kimia dan pengamatan perubahan sifat mekanis logam material Stud Bolt akibat pengaruh panas tekanan dan getaran. Hasil dari pengujian SEM denganmenggunakandetektor BSE terlihatpatahanyang terjadimerupakanpatahan brittle. Hasil pengujian komposisi kimiadan PMI kandungan Ni sebesar 34.5 - 35.5 %,dengan Cr sebesar 14.8 - 16.6 %.Hasil pengujian kekerasanmasihsesuaidengannilaistandarjikadibandingkandenganstandarmaterial SA-453 M Gr. 665 class A sebesar 328 - 410 HV (maks). Penyebab utama kerusakan digunakan untuk pengembangan kwalitas Stud Bolt serta optimasi usaha memperpanjang umur operasional (life time) meliputi perbaikan desain, material, manufaktur, cara pemasangan serta penerapan system manajemen pemeliharan yang tepat.
ANALISA KERUSAKAN PLATE WIRE PADA PROSES COILING
Authors: Miharja Jaja 
Published: July 2021

Plate Wire mengalami kerusakan ketika akan dilakukan proses spiral setelah di proses rolling dari solid wire. Kerusakan yang terjadi patah pada saat awal proses spiral. Dengan pengamatan visual kerusakan Plate Wire, harus dilakukan pengujian - pengujian untuk memastikan penyebab kerusakan tersebut meliputi pengujian komposisi material, uji kekerasan, dan uji metalografi dan pengamatan struktur mikro. Analisa hasil pengujian di bandingkan dengan literatur, standart material internasional, dan faktor - faktor pendukung lainnya diharapkan mampu menjadi referensi pengambilan keputusan yang tepat tentang penyebab utama kerusakan. Hasil uji komposisi kima yang paling berpengaruh unsur karbon (C) pada (0,648 % C) tidak sesuai dengan standar JIS G4051 2007 (0.42 – 0,48%C), dan rata - rata nilai kekerasan sebesar 488,666 HV tidak sesuai dengan standar JIS G4051 2007 (160 – 230) HV. Kesimpulan penyebab utama kerusakan digunakan untuk pengembangan kwalitas Plate Wire serta upaya improvement sifat material untuk memperpanjang umur material (life time) meliputi heat treatment, komposisi material, manufaktur, serta penerapan prosedur kerja yang tepat.
ANALISIS PERPINDAHAN PANAS PADA WATER JACKET DI RUANG BAKAR PRIMER INCINERATOR SAMPAH KOTA
Authors: Atifah Nailul , Herlambang Bambang , Astuti Edi Tri , Mulyana Yayan , Sebayang Perdamean 
Published: July 2021

Telah dilakukan penelitian mengenai analisis perpindahan panas pada water jacket di ruang bakar primer incinerator sampah kota. Analisis perpindahan panas dilakukan ketika water jacket berada dari fase cair hingga mencapai titik didihnya, yaitu 100 oC, Suhu api pembakaran diasumsikan seragam berdasarkan hasil pengukuran api ruang bakar diperoleh nilai stabil yakni 1097 oC. Variasi debit aliran water jacket adalah 300, 400, 500, dan 600 liter/jam. Tujuan penelitian ini adalah untuk mengetahui bagaimana kenaikan suhu dan karakteristik perpindahan panas pada water jacket dan pengaruh variasi debit terhadap kenaikan suhu water jacket di sepanjang ketinggian dinding ruang bakar. Penelitian dilakukan dengan melakukan perhitungan parameter termohidrolika yang merupakan fungsi suhu yang meliputi densitas, viskositas, konduktivitas, dan bilangan Prandtl. Kemudian, dilanjutkan dengan melakukan perhitungan bilangan Reynolds, Nusselt, koefisien perpindahan panas konveksi, Log Mean Temperature Difference (LMTD), resistensi termal total, dan laju perpindahan panas di sepanjang tinggi cerobong (L) sampai suhu air mencapai 100 oC. Perhitungan tersebut dilakukan dengan metode Euler. Dari hasil perhitungan perpindahan panas diketahui bahwa suhu water jacket di sepanjang ketinggian dinding ruang bakar mengalami kenaikan hingga mencapai titik didihnya. Akan tetapi, ketika aliran water jacket semakin mencapai ke atas, gradien kenaikan suhunya mengalami penurunan nilai. Dengan demikian, laju perpindahan panasnya juga ikut mengalami penurunan. Dari variasi debit diperoleh hasil bahwa semakin besar debit aliran water jacket, kenaikan suhu yang dialami water jacket di sepanjang ketinggian ruang bakar juga semakin kecil. Dengan demikian semakin besar debit aliran water jacket, lintasan yang dibutuhkan untuk mencapai titik didihnya juga semakin panjang. Semakin besar debit aliran water jacket, maka laju perpindahan panas di posisi aliran yang sama juga semakin besar.
TO EVALUATE COGNITIVE PERFORMANCE IN PATIENTS WITH CHRONIC KIDNEY DISEASE
Authors: Singhal Saurabh 
Published: July 2021

Background: In people with chronic kidney disease (CKD), cognitive decline is one of the major causes for poor outcome in terms of quality of life and survival rate. Previous studies have found an association between cardiovascular disease and psychiatric disorders in people with CKD. Physicians should keep in mind that the psychiatric changes and cognitive decline seen in all stages of CKD is to be detected early in the course of the disease, for timely management of it and for better outcome in terms of survival rate.
Aim: The goal of this study is to evaluate cognitive performance in patients with chronic renal disease
Material and Method: The study was conducted from March 2019 to april 2021 in department of general medicine and nephrology clinic at KDMCH, Mathura. Between March 2019 to april 2021, baseline data were obtained. The study included 108 participants (58 with CKD and 50 with ESKD). ESKD patients were ‘CKD patients with dialysis’. Various tests were used to assess brain function.
Results: ESKD patients had significantly lower scores on the 3MS, TMT-A and TMT-B trials, with a difference between TMT-A and B than CKD patients. In ESKD patients, the numbers less than 3MS of speech and fluency memory, as well as visuo-position and structure, were significantly lower. ESKD patients had the highest number of patients with psychiatric disorders, as measured by the outpatient testing scores listed above 3MS, TMT-A, and TMT-B. ESKD patients had significantly higher levels of depression than CKD patients.
Conclusion: Higher cognitive decline was found in the ESKD group in comparision to non-dialysis CKD group. Also ESKD was associated with higher rates of cerebro-vascular disease, cardio-vascular disease and peripheral artery disease.
Keywords: Chronic Kidney Disease, ESKD, eGFR and cognitive impairment