bluuebunny/crossref_metadata_2025_split huggingface dataset:
Designing key parameters of bubble plumes to restore water quality by using conceptual models: a case study in a sub-deep reservoir
Authors: Lan Chen , Chen Jingan , Guo Jianyang , Wang Jingfu 
Published: August 2020

Abstract
Bubble plumes are a popular hypolimnetic reaeration technique in deep-water reservoirs since they have the advantage of delivering direct reaeration to the hypolimnion. Improving the understanding of the integrated reaeration processes is beneficial to optimize the reaeration capacity of the aeration or oxygenation system. In this study, the discrete bubble model was first employed to design an oxygenation system for a sub-deep reservoir (the Aha Reservoir, southwest China, with water depths of 10–30 m). A new approach involving the discrete bubble model was used to determine the initial bubble size of the bubble plume applied. The intrusion models were demonstrated to be useful for designing the gas flow rate of the reaeration system. Using the intrusion models, we predicted the intrusion thickness and intrusion distance during operation for the first time. Subsequently, we verified the predictions and produced more realistic empirical formulas. At present, reports about recommendations on initial bubble size and gas flow rate are rare, and practical verification is absent. Taking the Aha Reservoir as an example, the initial bubble radius of 1 mm and the gas flow rate of 20 m3·h−1 were recommended for bubble plume oxygenation and were found to be successful in the field. Our understanding of the reaeration processes during the operation of the bubble plume system is far from comprehensive, but this study serves to highlight the potential of the discrete bubble model and the intrusion models for designing a bubble plume system in an individual lake.
The Mechanisms Involved in Obesity-Induced Male Infertility
Authors: Heydari Hamed , Ghiasi Rafighe , Ghaderpour Saber , Keyhanmanesh Rana 
Published: August 2020

Introduction:Obesity resulted by imbalance between the intake of energy and energy consumption can lead to growth and metabolic disease development in people. Both in obese men and animal models, several studies indicate that obesity leads to male infertility.Objective:This review has discussed some mechanisms involved in obesity-induced male infertility.Method:Online documents were searched through Science Direct, Pubmed, Scopus, and Google Scholar websites dating from 1959 to recognize studies on obesity, kisspeptin, leptin, and infertility.Results:Obesity induced elevated inflammatory cytokines and oxidative stress can affect male reproductive functions, including spermatogenesis disorders, reduced male fertility power and hormones involved in the hypothalamus-pituitary-gonadal axis.Conclusion:There is significant evidence that obesity resulted in male infertility. Obesity has a negative effect on male reproductive function via several mechanisms such as inflammation and oxidative stress.
Nitrogen-doped Carbon Dots from Hutai-8 Grape Skin and their Application in Hg2+ Detection
Authors: Zhang Pan , Zhao Shun-Sheng , Wang Jia-Jia , Liu Xiang-Rong 
Published: August 2020

Background:In recent years, environmental pollution and heavy metal pollution caused by rapid urbanization and industrialization have become increasingly serious. Among them, mercury (II) ion (Hg2+) is one of the highly toxic heavy metal ions, and its pollution comes from various natural resources and human activities. Therefore, people attach great importance to the development of analytical methods for effective analysis and sensitive detection of Hg2+.Objective:Using grape skin as a green and environment friendly carbon source to synthesize fluorescent carbon dots and to apply them in detecting the concentration of Hg2+in water.Methods:Using "Hutai No. 8" grape skin as a carbon source, fluorescent carbon dots were synthesized by a one-step hydrothermal method. The structure and fluorescent properties of the carbon dots were tested using TEM, XPS, XRD, and other characterization instruments, and their utilization on the detection of mercury ions in the actual water samples was explored.Results:The CDs had a particle size of about 4.8 nm and a spherical shape. There were N-H, C-N, C=O, and other functional groups on the surface. It was found that Hg2+has an obvious fluorescence quenching effect on CDs, and thus CDs fluorescence quenching method to detect the concentration Hg2+was established, and the detection limit was 3.7 μM, which could be applied to test the concentration of Hg2+in water samples.Conclusion:Using grape skin as a carbon source, fluorescent carbon dots were successfully synthesized by the hydrothermal method. Carbon dots were used to detect mercury ions in water, and a method for detecting mercury ions in actual water samples was established.
Experimental and Numerical Analyses of Steel-concrete Composite Floors
Authors: Francavilla Antonella B. , Latour Massimo , Rizzano Gianvittorio 
Published: August 2020

Background:
The performances of composite steel-concrete slabs are strongly influenced by the connection between the concrete and the steel decking, which is essentially assured by bonding, interlocking, and adhesion. The connection can be continuous or localized by means of connectors. In order to increase the bonding between steel and concrete elements and to allow their collaboration, typically, a continuous connection with indentations or embossings is realized.

Objective:
In this study, the simulation of the concrete-steel bond interaction of a typical composite decking is analyzed. In particular, the objective is the investigation of the role of the main geometric parameters of the indentations or embossings that determine the effective functionality of the connection.

Methods:
To this scope, the results of four-point bending tests on five specimens of a typical layout of a composite floor are reported and discussed. Then, the obtained results are used to determine the shear bond strength according to the partial interaction method, by following the procedure provided by the Eurocode 4. Successively, the experimental results are exploited in order to calibrate a FE model in Abaqus software to be able to account for the basic effects involved in the shear bonding mechanism, i.e. interlocking, friction, and adhesion.

Results & Conclusion:
Finally, the obtained results are discussed, and the FE model is used to evaluate the geometrical and mechanical parameters influencing the longitudinal shear bonding resistance.
Childhood Trauma, Reflective Functioning, and Problematic Mobile Phone Use Among Male and Female Adolescents
Authors: Musetti Alessandro , Brazzi Francesca , Folli Maria C. , Plazzi Giuseppe , Franceschini Christian 
Published: August 2020

Background:
The association between traumatic experiences, different forms of emotion dysregulation and problematic technology uses is well established. However, little is known about the role of childhood traumatic experiences and reflective functioning in the onset and maintenance of mobile phone addiction symptoms among adolescents.

Methods:
Self-reported measures on childhood traumatic experiences, reflective functioning, and Problematic Mobile Phone Use (PMPU) were administered to 466 high school students (47.1% females) aged 13-19 years old. Participants also reported the number of hours per day spent on using a mobile phone.

Results:
Hierarchical multiple regression analyses showed that increased time spent on the mobile phone, low reflective functioning scores and high childhood trauma scores predicted PMPU scores in the sample. Moreover, two gender-specific pathways were found. Among males, PMPU was positively related to time spent on mobile phone and childhood traumatic experiences and negatively related to reflective functioning. Among females, PMPU was negatively associated with time spent on mobile phone for video gaming and with reflective functioning.

Conclusion:
These results might have relevant clinical implications in highlighting the importance of planning gender-tailored interventions for adolescents who report mobile phone addiction symptoms.
Prevalence of Strox Smoking Among University Students in Cairo, Egypt
Authors: Hashim Ahmed M. M. , Hassan Ahmed M. , El-Din Amin Ghada Essam , Allam Mohamed Farouk 
Published: August 2020

Background:
In Egypt, the prevalence rate of New Psychoactive Substances (NPSs) use is severely underestimated. In the last 5 years, several non-scientific reports have demonstrated the presence of an emergent, cheap NPSs that has taken the name of “Strox” or “Egyptian Spice”. The objective of this study was to estimate the prevalence rate of Strox smoking among undergraduate students attending Ain Shams University (ASU), Cairo (Egypt).

Methods:
A cross-sectional study was conducted in five non-medical colleges of ASU, namely, Law, Commerce, Computer Science, Engineering, and Literature. Participants were recruited using a convenient sampling method and were asked about NPSs use. Data were collected using the Marijuana Smoking History Questionnaire (MSHQ) developed by Bonn-Miller and Zvolensky (2009). The questionnaire was translated and modified to reflect Egyptian slang and culture.

Results:
This study included 558 students, 422 (75.6%) males and 136 (24.4%) females. The results showed that 189 (33.9%) were current tobacco smokers, 51 (9.1%) were smokers of substances other than tobacco, 45 (8.1%) were cannabis smokers, 38 (6.8%) were Strox smokers, and 3 (0.5%) were Voodoo smokers. When students were asked about their reasons for smoking Strox, they cited the following motivations: to achieve a feeling of euphoria(28.9%), depression (23.7%), experimentation (23.7%), peer pressure (21.1%), and having excess money (2.6%). The results showed a clear association between tobacco and cannabis smoking and consumption of Strox.

Conclusion:
Although the prevalence rates of NPSs usage as observed in this study were not high, higher rates could be expected in other communities outside of the university. Community-based studies are needed to estimate the magnitude of NPSs use in Egypt and the associated risk factors.
Tailored Fiber Placement in Thermoplastic Composites
Authors: Spickenheuer Axel , Scheffler Christina , Bittrich Lars , Haase Rico , Weise Dieter , Garray Didier , Heinrich Gert 
Published: August 2020

Fiber path optimization methods combined with the Tailor Fiber Placement (TFP) technology provide the optimum correlation between load case and fiber orientation and therefore lead to unmatched component performance with endless fiber composite materials. The aim of this work is the development of an innovative manufacturing technology for thermoplastic composites (TPC) including sizing-adapted commingled glass fiber (GF) / thermoplastic yarns (SpinCom yarns) to be processed by TFP to textile preforms with a variable-axial, load adapted fiber design. Furthermore, these preforms will be consolidated in a low energy and resource consuming process using novel light and low cost forming tools produced by incremental sheet metal forming technology. Finally, a low cost solution for thermal processing even for complex shaped TPC parts will be presented. Heading towards optimized resource and cost efficiency of the whole process chain, first results of SpinCom yarns, fiber path optimization, tool manufacturing and forming procedure are presented and demonstrated using GF/PBT (polybutylene therephthalate) SpinCom yarns and the geometry of a bicycle saddle.
Augmented Reality System for Digital Rectal Examination Training and Assessment: System Validation
Authors: Muangpoon Theerapat , Haghighi Osgouei Reza , Escobar-Castillejos David , Kontovounisios Christos , Bello Fernando 
Published: August 2020

Background
Digital rectal examination is a difficult examination to learn and teach because of limited opportunities for practice; however, the main challenge is that students and tutors cannot see the finger when it is palpating the anal canal and prostate gland inside the patients.

Objective
This paper presents an augmented reality system to be used with benchtop models commonly available in medical schools with the aim of addressing the problem of lack of visualization. The system enables visualization of the examining finger, as well as of the internal organs when performing digital rectal examinations. Magnetic tracking sensors are used to track the movement of the finger, and a pressure sensor is used to monitor the applied pressure. By overlaying a virtual finger on the real finger and a virtual model on the benchtop model, students can see through the examination and finger maneuvers.

Methods
The system was implemented in the Unity game engine (Unity Technologies) and uses a first-generation HoloLens (Microsoft Inc) as an augmented reality device. To evaluate the system, 19 participants (9 clinicians who routinely performed digital rectal examinations and 10 medical students) were asked to use the system and answer 12 questions regarding the usefulness of the system.

Results
The system showed the movement of an examining finger in real time with a frame rate of 60 fps on the HoloLens and accurately aligned the virtual and real models with a mean error of 3.9 mm. Users found the movement of the finger was realistic (mean 3.9, SD 1.2); moreover, they found the visualization of the finger and internal organs were useful for teaching, learning, and assessment of digital rectal examinations (finger: mean 4.1, SD 1.1; organs: mean 4.6, SD 0.8), mainly targeting a novice group.

Conclusions
The proposed augmented reality system was designed to improve teaching and learning of digital rectal examination skills by providing visualization of the finger and internal organs. The initial user study proved its applicability and usefulness.
Digital Health Needs of Women With Postpartum Depression: Focus Group Study
Authors: Lackie Madison E , Parrilla Julia S , Lavery Brynn M , Kennedy Andrea L , Ryan Deirdre , Shulman Barbara , Brotto Lori A 
Published: August 2020

Background
Although approximately 10% of new mothers in Canada develop postpartum depression (PPD), they face many barriers when accessing care. eHealth offers a unique opportunity to provide psychosocial skills and support to new mothers; however, patient populations are not consistently engaged in eHealth development processes. Thus, the diversity of women’s backgrounds and needs are often not reflected in existing tools.

Objective
This study aims to engage women from a variety of backgrounds and locations around British Columbia (BC) who have previously experienced PPD to determine the unmet psychoeducational needs of women with PPD and how a web-enabled platform used to deliver psychosocial skills and education to assist in the management of PPD could fulfill those needs.

Methods
Focus groups were conducted in 7 cities across BC with a total of 31 women (mean age 34.5 years, SD 4.9), with each group ranging from 2-7 participants. Focus groups were cofacilitated by the study coordinator and a local service provider in each community using a semistructured guide to discuss participants’ needs, ideas, and opinions as they relate to the use of technology in PPD management. Transcripts were approached inductively using thematic analysis to identify themes and qualitative description to frame what was observed in the data.

Results
A total of 5 themes were identified: bridging gaps to meet needs; providing validation to combat stigma; nurturing capacity to cope, manage, and/or reach wellness; empowering people to take ownership over their mental health; and offering customization to ensure relevance. Each theme identified a need (eg, combatting stigma) and a way to address that need using a web-enabled intervention (eg, providing validation). At the intersection of these themes was the overarching value of promoting agency for women experiencing PPD.

Conclusions
Ultimately, new mothers require accessible mental health care that promotes their agency in mental health care decision making. Our participants believed that a web-enabled intervention could help meet this need. These data will be used to guide the design of such an intervention, with the eventual implementation of this resource as a first-line management option for PPD.
Aplikasi Sistem Pendukung Keputusan Distribusi Air Bersih dengan Fuzzy Integer Transportation
Authors: Arifin Aridhanyati , Hartati Sri 
Published: August 2020

Abstrak— Kebutuhan air bersih di kota-kota berkategori urban semakin lama semakin meningkat, sementara produktivitas air menurun disebabkan oleh berbagai alasan. Persoalan yang harus dipecahkan adalah bagaimana agar distribusi air ke tujuan berjalan secara simultan, yakni antara supply air dengan demand pelanggan ditengah minimnya anggaran biaya. Perlu dicari keputusan bagi perencanaan distribusi yang baik untuk mengalokasikan air, dari sejumlah sumber air menuju sejumlah tujuan (kota). Oleh karena itu, diperlukan sistem terkomputerisasi yang memiliki kemampuan dalam memberikan dukungan untuk pengambilan keputusan, maka perlu dirancang suatu sistem pendukung keputusan (SPK) yang dapat membantu manajemen distribusi air bersih. SPK ini mengimplementasikan Fuzzy Integer Transportation dengan nilai fuzzy supply, fuzzy demand dan fuzzy goal yang diekspresikan melalui bilangan fuzzy. Tabel transportasi dipakai untuk mempermudah pemodelan nilai supply dan demand yang ber-interval. Sebuah algoritma khusus digunakan agar dapat menghasilkan solusi integer yang optimal sehingga dapat meningkatkan efisiensi pencarian. Selain itu pemecahan masalah distribusi ini memakai pendekatan Vogel’s Approximation Method (VAM), memberikan solusi yang feasible bagi total biaya distribusi. Output sistem adalah total biaya distribusi dan jumlah air yang didistribusikan ke masing-masing tujuan. Kata Kunci— Sistem Pendukung Keputusan, Fuzzy Integer Transportation, VAM
Implementasi Metode Fuzzy TOPSIS untuk Seleksi Penerimaan Karyawan
Authors: Lestari Sri , Priyodiprodjo Widodo 
Published: August 2020

Abstract —An emerging institution would continue to need qualified workers to produce good performances. Seeing the importance of high quality employees, the candidate selection process became an important part and should be performed promptly. It is also important to have candidates with desirable criteria fit to the institution. Many proposed methods can be adapted to help employee selection process based on criteria. This research propose an employee selection system based on Fuzzy Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method, because the proposed method capable to deal with multi dimensional problems in employees selection. The system will produce ranks that can be used to help the hiring decision. This research also compares the results from TOPSIS method and WPM method. The comparison result shows that both methods produce the same ranks for the chosen candidates.Keywords— Fuzzy TOPSIS, WPM, Employee Selection.
Sistem Pendukung Keputusan Model Fuzzy AHP Dalam Pemilihan Kualitas Perdagangan Batu Mulia
Authors: Wahyuni Sri , Hartati Sri 
Published: August 2020

AbstrakPemilihan kualitas batu mulia membutuhkan kemampuan khusus untuk memilih dan menilai kualitas batu mulia yang akan diperdagangkan. Keberagaman jenis batu mulia dan konsumen menjadi kendala tersendiri ketika pengetahuan dan kemampuan individu dalam menganalisis kualitas batu mulia sangatlah minim.Penelitian ini menggunakan metode kuantitatif dengan menggunakan model Fuzzy AHP. Pengumpulan data dilakukan dengan cara konsultasi dengan Direktur Kantor Pusat Promosi Batu Mulia Indonesia GEM-AFIA GROUP di Bandung sehingga dihasilkan kriteria-kriteria terbaik dalam pemilihan kualitas perdagangan batu mulia. Kriteria-kriteria tersebut kemudian disusun berdasarkan literatur, observasi dan wawancara, selanjutnya diberi penilaian perbandingan berpasangan dengan AHP untuk mencari bobot informasional dan menggunakan TFN untuk mencari upper excepted value.Hasil yang didapat dengan menggunaan model Fuzzy AHP dalam pemilihan kualitas perdagangan batu mulia menunjukkan bahwa kriteria berat jenis, warna, kekerasan, pemotongan, dan kejernihan merupakan kriteria utama dalam pemilihan kualitas perdagangan batu mulia. Fuzzy AHP dalam penilaian tingkat kosistensi dilakukan pada level struktur hierarki dan mampu mengakomodir ketidak konsistenan dalam penilaian. Kata kunci—AHP (Analysis Hierarchy Process), Fuzzy AHP, TFN (Triangular Fuzzy Number), upper eecepted upper. AbstractThe selection process of Precious stone quality requires particular ability in selecting and assessing the quality of traded Precious stones . The diversity types of Precious stoneand consumers in choosing it become an obstacle since the limited knowledge and ability to analyze needs of individuals.This research applied quantitative method by employing Fuzzi AHP model. The data was collected by consulting the director of Kantor Promosi Batu Mulia Indonesia GEMAFIA GROUP located in Bandung that gives some criteria in the selection of Precious stonetrade quality. Further, these criteria are formulated based on AHP pair comparison to find out the informational quality and upper expected values using TFT (triangular Fuzzy Number).The result that is based on Fuzzy AHP method show that density, color, hardness, cutting and clarity criteria are the criteria in selecting Precious stonetrade quality. This method in the assessment of consistency level is done in the hierarchy structure level and is able to accommodate the assessment inconsistency. Keywords—AHP (Analysis Hierarchy Process), Fuzzy AHP, TFN (Triangular Fuzzy Number), upper eecepted upper.