bluuebunny/crossref_metadata_2025_split huggingface dataset:
Surface roughness prediction of wire electric discharge machining (WEDM)-machined AZ91D magnesium alloy using multilayer perceptron, ensemble neural network, and evolving product-unit neural network
Authors: Gurgenc Turan , Altay Osman 
Published: March 2022

AbstractMagnesium (Mg) alloy parts have become very interesting in industries due to their lightness and high specific strengths. The production of Mg alloys by conventional manufacturing methods is difficult due to their high affinity for oxygen, low melting points, and flammable properties. These problems can be solved using nontraditional methods such as wire electric discharge machining (WEDM). The parts with a quality surface have better properties such as fatigue, wear, and corrosion resistance. Determining the surface roughness (SR) by analytical and experimental methods is very difficult, time-consuming, and costly. These disadvantages can be eliminated by predicting the SR with artificial intelligence methods. In this study, AZ91D was cut with WEDM in different voltage (V), pulse-on-time (µs), pulse-off-time (µs), and wire speed (mm s−1) parameters. The SR was measured using a profilometer, and a total of 81 data were obtained. Multilayer perceptron, ensemble neural network and optimization-based evolving product-unit neural network (EPUNN) were used to predict the SR. It was observed that the EPUNN method performed better than the other two methods. The use of this model in industries producing Mg alloys with WEDM expected to provide advantages such as time, material, and cost.
Effect of FeTi-FeB inoculation on the shape of carbide reinforcements in hypoeutectic high chromium white cast iron
Authors: Teker Tanju , Yilmaz S. Osman , Dalmiş İ. Savaş 
Published: March 2022

Abstract
FeTi-FeB was added to molten high chromium white cast iron in amounts of 0.5–2.5 wt% at 50 °C above the melting temperature. The samples were produced in four groups. The first group samples were investigated as cast, the second group homogenized at 1000 °C for 1 h, and the other two groups were also homogenized at 1000 °C but for 3 and 6 h, respectively. To study the effect of FeB and FeTi on the microstructure, the samples were characterized by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction and hardness tests. Wear tests were performed using a pin-on disc. A homogeneously dispersed carbide microstructure was produced by the homogenization heat treatment method. The addition of FeTi-FeB inoculants to high Cr white cast iron played an important role in the distribution of hard carbides. The chemical rate and the carbide volume varied on account of the added hard inoculant particles. TiB2, Cr3C2, M7C3, M23C6, and γ-FeCr phases formed on the surfaces. The hardness and wear resistance were improved considerably due to FeTi-B inoculation.
Revitalisasi TPS 3R melalui Penyuluhan Pengelolaan Sampah dan Pelatihan Pembuatan Kompos dari Sampah Organik
Authors: Suraya Fatona , Safitri Erika Ayu , Maulana Wahyu Rossy , Pratama Faisal Andi , Nafisah Durotun 
Published: March 2022

Sampah menjadi salah satu fenomena masalah yang sampai saat ini belum dapat diselesaikan secara efektif. Sampah organik merupakan sampah padat yang mudah membusuk dan menimbulkan bau yang sangat menyengat. Keberadaan sampah ini sangat mengganggu kebersihan dan kesehatan lingkungan. Maka diperlukan pengelolaan sampah yang tepat. Tujuan dari kegiatan pengabdian pada masyarakat ini adalah sosialisasi atau penyuluhan tentang pentingnya kebersihan lingkungan salah satunya dengan membuang sampah pada tempatnya, menjelaskan jenis-jenis sampah agar ketika masyarakat membuang sampah dapat dipilah terlebih dahulu, memberi nilai tambah pada sampah organik agar berdaya guna, salah satunya dengan diolah menjadi pupuk kompos yang bermanfaat, menjelaskan dan mendampingi masyarakat khususnya kelompok tani dalam proses mengolah sampah organik menjadi pupuk kompos, menciptakan peluang usaha baru kepada masyarakat dengan mengolah sampah organik menjadi kompos yang memiliki nilai ekonomis yang tinggi. Sasaran dari kegiatan ini adalah masyarakat Desa Muntung dan kelompok tani Desa Muntung. Metode pengabdian pada masyarakat ini didahului dengan penyuluhan dan demonstrasi pembuatan kompos. Manfaat yang diperoleh dari kegiatan ini antara masyarakat dapat mengolah sampah organik menjadi kompos serta meningkatkan pengetahuan dalam pengelolaan dan pengolahan sampah sehingga lingkungan menjadi lebih bersih dan nyaman serta bisa meningkatkan perekonomian.
Peran Digital Marketing dan Packaging dalam Meningkatkan Produktifitas UMKM di Desa Muntung, Kecamatan Candiroto, Kabupaten Temanggung
Authors: Suraya Fatona , Maharani Dita Galuh , Rachmawati Heni , Putri Dea Mayang Yulia , Sari Ririn Andika 
Published: March 2022

Digital marketing adalah salah satu cara pemasaran yang saat ini sedang diminati oleh para pelaku usaha, melalui digital marketing ini pelaku usaha bisa memasarkan produk hasil buatannya. Pelaku UMKM di Desa Muntung memproduksi snack atau makanan yang berbahan baku dari tepung terigu. Produk kembang jambu ini merupakan salah satu produk unggulan dan diminati oleh warga masyarakat di sekutar Desa Muntung. Pemasaran kembang jambu masih menggunakan pemasaran manual, seperti dititipkan di warung-warung terdekat, atau bahkan para pembeli datang langsung ke lokasi produksi kembang jambu tersebut. Hal inilah yang menjadikan Kelompok KKN Unnes yang berjumlah 13 orang untuk membantu para pelaku UMKM dalam teknik pemasarannya. Ada 2 UMKM yang sudah berjalan lancar di Desa Muntung ini, namun masih disayangkan jika teknik pemasaran dan pengemasan masih tradisional. teknik pemasaran melalui digital marketing adalah salah satu upaya untuk meningkatkan produksi karena melalui digital marketing khalayak umum akan lebih tau produk-produk yang dijual terlebih jika memang produknya merupakan produk yang berkualitas. Sementara itu, dari hasil wawancara awal dengan pelaku usaha mikro produk makanan, baik produsen maupun retailer mengakui bahwa kemasan produk mempengaruhi citra produk. Namun pemahaman mereka tentang kemasan produk masih sangat minim. Menurut mereka kemasan hanya sekedar wadah dan pembungkus makanan agar tidak rusak. Permasalahan lain yaitu mereka tidak mempunyai kemampuan dana untuk mengemas produknya dengan baik. Dengan situasi persaingan semakin tajam, desain sebuah kemasan merupakan suatu nilai tambah, dapat berfungsi sebagai media promosi dan untuk menjaring konsumen.
Tide Prediction in Prigi Beach using Support Vector Regression (SVR) Method
Authors: Utami Tri Mar'ati Nur , Novitasari Dian Candra Rini , Setiawan Fajar , Ulinnuha Nurissaidah , Farida Yuniar 
Published: March 2022

Purpose: Prigi Beach has the largest fishing port in East Java, but the topography of this beach is quite gentle, so it is prone to disasters such as tidal flooding. The tides of seawater strongly influence the occurrence of this natural event. Therefore, information on tidal level data is essential. This study aims to provide information about tidal predictions.Methods: In this case using the SVE method. Input data and time were examined using PACF autocorrelation plots to form input data patterns. The working principle of SVR is to find the best hyperplane in the form of a function that produces the slightest error.Result: The best SVR model built from the linear kernel, the MAPE value is 0.5510%, the epsilon is 0.0614, and the bias is 0.6015. The results of the tidal prediction on Prigi Beach in September 2020 showed that the highest tide occurred on September 19, 2020, at 10.00 PM, and the lowest tide occurred on September 3, 2020, at 04.00 AM. Value: After conducting experiments on three types of kernels on SVR, it is said that linear kernels can predict improvements better than polynomial and gaussian kernels.
Environmental impacts of rare earth production
Authors: Zapp Petra , Schreiber Andrea , Marx Josefine , Kuckshinrichs Wilhelm 
Published: March 2022

AbstractRare earth elements (REEs) are important raw materials for green technologies. However, REE mining and production uses techniques that are often not environmentally sustainable. Life cycle assessment (LCA) is a well-recognized method for evaluating the environmental impacts of products and technologies. This article provides an overview of the environmental impacts based on published LCA results of primary REE production. Existing major REE deposits (Bayan Obo in China, Mountain Pass in the United States, Mount Weld in Australia, ion-adsorption deposits in several Chinese southern provinces) and currently possible production routes are compared. Alternative minerals, such as eudialyte, are also discussed. The article shows which environmental effects can be minimized by technology optimization and environmental safety strategies. Additionally, some of the environmental impacts discussed, may be difficult to mitigate, as they depend on the mineral type. Activities along the complex process chain of REEs production that have particularly high environmental impacts are identified.
Graphical abstract
Osseous Morphological Differences in Knee Osteoarthritis
Authors: Siddiqi Ahmed , Anis Hiba , Borukhov Ilya , Piuzzi Nicolas S. 
Published: March 2022

Background:
Improved understanding of the morphological characteristics of knees with osteoarthritis (OA) and various deformities can enable personalized implant positioning and balancing in total knee arthroplasty in an effort to continue improving clinical outcomes and optimizing procedural value. Therefore, the purpose of this study was to outline morphological differences in the medial and lateral distal femur and proximal tibia associated with varus and valgus deformities in knee OA.

Methods:
A large computed tomography (CT) database was used to identify 1,158 knees, which were divided into normal and osteoarthritic groups; the latter was further divided on the basis of deformity into neutral, varus, and valgus subgroups. Morphological measurements included the non-weight-bearing hip-knee-ankle angle (nwHKA), mechanical lateral distal femoral angle (mLDFA), medial proximal tibial angle (MPTA), rotation of the posterior condylar axis (PCA) relative to the surgical transepicondylar axis (sTEA), ratio of medial to lateral posterior condylar offset, ratio of medial to lateral condylar radius, medial posterior slope (MPS), lateral posterior slope (LPS), medial coronal slope (MCS), and lateral coronal slope (LCS).

Results:
Compared with the normal group, the OA group was in overall varus (nwHKA, −2.2° ± 5.0° compared with −0.2° ± 2.4°) and had a significantly smaller MPS (8.4° ± 4.0° compared with 9.2° ± 4.0°), larger LPS (9.2° ± 3.6° compared with 7.2° ± 3.3°), and smaller MCS (82.1° ± 4.3° compared with 83.9° ± 3.3°). Differences among the OA subgroups were also observed for the MCS and LCS. Compared with the normal group, the sTEA of the OA group was less externally rotated relative to the PCA (0.3° ± 1.5° compared with 1.2° ± 1.9°), and both the condylar offset ratio (1.01 ± 0.06 compared with 1.04 ± 0.07) and the condylar radius ratio (0.98 ± 0.07 compared with 1.03 ± 0.07) were smaller. Only the condylar radius ratio showed differences among the OA subgroups, with valgus deformity associated with a larger ratio.

Conclusions:
An analysis of CT scans of 965 healthy and 193 osteoarthritic knees revealed significant differences in PCA, condylar offset, and condylar radius as well as tibial slope in both the sagittal and coronal planes.

Clinical Relevance:
There is a strong need to evolve toward a more personalized treatment for osteoarthritic knees that utilizes implants and technology to help tailor total knee arthroplasty on the basis of the patient’s morphologic characteristics.
Late presentation of D-TGA managed by Glenn Shunt led to SVC Syndrome 10 years later: a rare case report
Authors: Osama Esraa , Arriola-Montenegro Liliana , Yaseen Aya , ElTohamy Abdelrahman 
Published: March 2022

Abstract
We describe a complicated case of dextro-transposition of the great arteries (d-TGA) that was treated unusually late at age four by Glenn Shunt operation with pulmonary artery banding. She presented fifteen years later with superior vena cava syndrome as a consequence of Glenn shunt failure and was managed conservatively. Glenn Shunt with pulmonary artery banding can be done for Dextro-TGA patients in which arterial switch operation is contraindicated; however, pulmonary artery banding failure can cause a functional obstruction leading to fatal SVC syndrome.
Hotel Housekeepers and Occupational Health: Experiences and Perceived Risks
Authors: Chela-Alvarez Xenia , Bulilete Oana , Garcia-Illan Encarna , Vidal-Thomas Clara , Llobera Joan 
Published: March 2022

Abstract
Background: Hotel housekeepers are the second most important occupational group within tourism hotel sector; various health problems related to their job have been described, above all musculoskeletal disorders. The objective of this study is to understand the experiences and perceptions of hotel housekeepers and key informants from the Balearic Islands (Spain) regarding occupational health conditions, the strategies employed to mitigate them and the social context in which they occur. Methods: A qualitative study with a phenomenological approach was carried out. Six focus groups with hotel housekeepers and 10 semi-structured interviews with key informants were conducted. Next, we carried out a content analysis. Results: Hotel housekeepers reported musculoskeletal disorders, anxiety and stress as main occupational health problems; health professionals underscored the physical problems. Hotel housekeepers perceived that their work (characterized by being physically demanding and with repetitive movements) caused their health conditions. To solve health issues, they used medication, mostly anti-inflammatory agents and painkillers and, to a lesser extent, sedatives and anxiolytics, which allowed them to continue working; health public services, which they generally rated as satisfactory; personal protective equipment; ergonomics (with difficulties due to high work pace and hotel facilities) and physical activity. Two contrasting attitudes were identified regarding sick leave: HHs who refused to accept a doctor-prescribed sick leave (due to fear of being fired, sense of responsibility, downplaying their pain...), and those who accepted it (because they could not continue working, they prioritised health before work). Conclusion: Our results might contribute to plan improvement strategies to address health problems among hotel housekeepers, to improve the attention received in primary care settings as well as their working condition.
Toxicity of heavy metals in water, sediments and different body organs of fish Labeo rohita (rohu) at head Balloki, river Ravi, Lahore Pakistan
Authors: Rasib Khalid , Ejaz Zara , Hussain DIlawar 
Published: March 2022

Abstract
The present work was designed to evaluate the Contamination of heavy metals in water is regarded as global crises with a large share in developing countries like Pakistan. In present study, health risk consequences of composition of heavy metal contaminated water and fish collected at Head Balloki (River Ravi) were evaluated. 3 samples of water were collected at six different sights of Head Balloki for each Pre and Post Monsoon. Fish samples were collected at some six sights and their gills, liver were removed for heavy metal analysis. This study reported that the Concentration of chromium Cr was found higher than the Nickel Ni in water Cr > Ni. On the other hand, in fish organ of Labeo rohita the concentration of Chromium Cr was higher than the Ni in Gills Cr > Ni and the concentration of Ni was higher than the chromium Cr in Liver Ni > Cr. All the samples were analyzed to determine the concentration of two heavy metals (Cr, Ni) using Spectrophotometer techniques. The data thus obtained were analyzed, statistically. Research must also analyze the relationship between water and heavy metals and metal levels detected in fish.
Discriminant Analysis of Sperm Cryotolerance Among Different Breeds of Chickens in Hot Humid Tropical Environment
Authors: Ojo T.S. , Oke O.E. , Iyasere O.S. , Wheto M. , Durosaro S.O. , Logunleko M.O. , Adekunle O. Ezekiel , Ndubuisi-Ogbonna L.C. , Daramola James Olamitibo 
Published: March 2022

Abstract
Cryopreservation is a viable reproductive technique but still have detrimental consequences on sperm quality and fertility. This study compared the sperm cryotolerance among different breeds of chickens in hot humid environments. Semen samples were collected from thirty (30) cocks comprising 10 Funaab alpha normal feathers, Arbo acre and dominant black. The semen was analyzed for acrosome integrity, membrane integrity, seminal leukocyte, Live/dead, sperm abnormality, MDA concentration and sperm motility. Breed differences (p < 0.01) were observed in Acrosome integrity, seminal leukocyte, live/dead ratio, sperm abnormal midpiece and sperm abnormal tail. The stepwise discriminant analysis revealed that live/dead, MDA, Abnormal midpiece, Leukocyte, Acrosome, Abnormal head and sperm motility are discriminant variables that can effectively differentiate the three breeds of chickens with Live/dead, MDA and Leukocyte having highly significant (P < 0.0001) discriminatory power. The study obtained two canonical variables accounting for 66.94% and 33.06% of the total variation respectively. The three breeds of chicken were differentiated by linear discriminant functions. 56.67% of Funaab Alpha chicken, 67.78% of Arbo acre and 47.78% of Dominant black chicken were accurately assigned into their breeds while the longest Mahalanobis distance was found between Arbor Acre and Funaab Alpha chicken. The discriminant functions obtained in this study could help differentiate these three breeds of chicken that are suitable for artificial insemination in humid tropics using their post-thaw semen quality.
Swept-Source Optical Coherence Tomography in Preschool Children with a History of Treated or Spontaneously Regressed Retinopathy of Prematurity
Authors: Kizilay Osman , Acar Ozge Pinar Akarsu 
Published: March 2022

Abstract
Purpose: To evaluate the best-corrected visual acuity (BCVA), the spherical equivalan (SE), the central, parafoveal, and perifoveal macular thickness results of the children with a history of treated or spontaneously regressed retinopathy of prematurity (ROP). Methods: 79 right eyes of 79 children at the age of 5 years old were included in this cross-sectional observational study. 24 infants who received intravitreal bevacizumab (IVB) were in group 1, 27 infants who underwent laser photocoagulation (LPC) were in group 2 and 28 infants who had spontaneous regression were in group 3. Central foveal thickness (CFT) and the thicknesses of four parafoveal and four perifoveal quadrants as superior, temporal, inferior, and nasal were analyzed by using swept-source optical coherence tomography (SS-OCT).Results: BCVA was significantly better (p=0.002) and the SE was significantly higher in group 3 than in both groups 1 and 2 (p=0.033). CFT was significantly lower in group 3 than in both groups 1 and 2 (p<0.001). The parafoveal average, temporal, inferior, and nasal thickness values; the perifoveal average, superior, temporal thickness results were significantly higher in group 2 than in both groups 1 and 3 (p=0.003, p=0.002, p=0.009, p=0.009, respectively), (p=0.003, p<0.001, p=0.007, respectively).Conclusion: CFT was significantly higher in infants who had treatment for ROP. Parafoveal and perifoveal retinal thicknesses in certain quadrants were higher in those receiving LPC treatment than the others. CFT was negatively correlated with both gestational age and birth weight. Myopia was seen more often in children who had treatment.
Can Preoperative MRI Predict Intra-Operative Hamstring Graft Size In Double Bundle Anterior Cruciate Ligament Reconstruction?
Authors: Samejima Yuji , Mochizuki Yuta , Ishii Katsuhisa , Ikegami Hiroyasu , Musha Yoshiro 
Published: March 2022

Abstract
Background: Hamstring tendon graft diameters < 8 mm are considered a risk factor for graft failure. There is a lack of data regarding the prediction of double-bundle (DB) hamstring graft diameter using magnetic resonance imaging (MRI). This study aimed to evaluate whether preoperative MRI can be a predictor of DB hamstring graft diameter and to determine the minimum hamstring tendon cross-sectional area (CSA) on MRI required to produce a hamstring graft equivalent to 8 mm of a single-bundle (SB) graft, in the case of a DB graft.Methods: A retrospective study was performed on patients who underwent anterior cruciate ligament (ACL) reconstruction between 2017 and 2020. The inclusion criteria were (1) patients aged 20 years or older and (2) operation with DB reconstruction. The exclusion criteria were (1) multiple ligament injuries, (2) previous hamstring injury, and (3) patients who underwent revision surgery. The correlation between preoperative MRI CSA and anthropometric data and graft size was calculated, and the factors most associated with graft size were calculated using multiple regression analysis. The receiver operating characteristic (ROC) curve was also used to calculate the threshold for creating a thicker DB graft.Results: Based on the inclusion and exclusion criteria, we selected 69 patients for this study. There was a positive correlation between intra-operative graft size and height (r = 0.590, P < 0.001), weight (r = 0.485, P < 0.001) and preoperative MRI semitendinosus tendon + gracilis tendon CSA (r = 0.591, P < 0.001). Multiple regression analysis showed that preoperative MRI CSA was the most influential factor on intra-operative graft size (β = 0.366, 95% CI 0.237-0.946, P = 0.001). Based on the ROC analysis, the optimal cut-off value of MRI CSA for determining the CSA of DB graft corresponding to an SB diameter of 8 mm was 19.1 mm2 (sensitivity 96.3%, specificity 80.0%).Conclusions: MRI CSA was found to be the most relevant factor for graft size. The ability to predict graft diameter by preoperative MRI is beneficial for surgical planning and graft selection and may reduce the risk of failure.Level of Evidence: Level IV, case series
Probabilistic analysis of water-sealed performance in underground oil storage considering spatial variability of hydraulic conductivity
Authors: Zhang Huijie , Zhang Bin , Li Yajun , Wang Lei , Li Yutao , Shi Lei , Wang Hanxun 
Published: March 2022

Abstract
For underground water-sealed oil storage, the spatial variability of the surrounding rock has a significant impact on the water-sealed effect of a water curtain system. This study presents a methodology for the probabilistic analysis of water curtain performance in underground oil storage, considering the spatial variability of hydraulic conductivity of the surrounding rock based on field data. Anisotropic random fields representing the spatial variability of hydraulic conductivity were established through spatial statistical analysis of field data and introduced into the finite element model of underground oil storage for water-sealed reliability analysis. The water-sealed performance of different water curtain system schemes was studied using Monte Carlo simulation (MCS). The results showed that the difference between the horizontal spatial correlation and the vertical spatial correlation of the surrounding rock has a significant impact on the water-sealed effect of the water curtain system. An excessively large pressure of water curtain boreholes provided a small contribution to improving water curtain performance. The distance between the water curtain holes and the caverns has the less significant affecting the water-sealed reliability of the storage cavern. Finally, the optimal design of the water curtain system is discussed. This study provides valuable insights and a theoretical basis for the optimisation of water curtain system design parameters for underground water-sealed oil storage.