bluuebunny/crossref_metadata_2025 huggingface dataset:
The IDQ curve: A tool for evaluating the direction of remanent magnetization from magnetic anomalies
Authors: Liu Shuang , Hu Xiangyun , Zhang Dalian , Wei Bangshun , Geng Meixia , Zuo Boxin , Zhang Henglei , Vatankhah Saeed
Published: June 2020

Natural remanent magnetization acts as a record of the previous orientations of the earth’s magnetic field, and it is an important feature when studying geologic phenomena. The so-called IDQ curve is used to describe the relationship between the inclination ( I) and declination ( D) of remanent magnetization and the Köenigsberger ratio ( Q). Here, we construct the IDQ curve using data on ground and airborne magnetic anomalies. The curve is devised using modified approaches for estimating the total magnetization direction, e.g., identifying the maximal position of minimal reduced-to-the-pole fields or identifying correlations between total and vertical reduced-to-the-pole field gradients. The method is tested using synthetic data, and the results indicate that the IDQ curve can provide valuable information on the remanent magnetization direction based on available data on the Köenigsberger ratio. Then, the method is used to interpret field data from the Yeshan region in eastern China, where ground anomalies have been produced by igneous rocks, including diorite and basalt, which occur along with magnetite and hematite ore bodies. The IDQ curves for 24 subanomalies are constructed, and these curves indicate two main distribution clusters of remanent magnetization directions corresponding to different structural units of magma intrusion and help identify the lithologies of the magnetic sources in areas covered by Quaternary sediments. The estimated remanent magnetization directions for Cenozoic basalt are consistent with measurements made in paleomagnetism studies. The synthetic and field data indicate that the IDQ curve can be used to efficiently estimate the remanent magnetization direction from a magnetic anomaly, which could help with our understanding of geologic processes in an area.
Experimental assessment of the stress-sensitivity of combined elastic and electrical anisotropy in shallow reservoir sandstones
Authors: Falcon-Suarez Ismael Himar , North Laurence , Callow Ben , Bayrakci Gaye , Bull Jon , Best Angus
Published: June 2020

Seismic and electromagnetic properties generally are anisotropic, depending on the microscale rock fabric and the macroscale stress field. We have assessed the stress-dependent anisotropy of poorly consolidated (porosity of approximately 0.35) sandstones (broadly representative of shallow reservoirs) experimentally, combining ultrasonic (0.6 MHz P-wave velocity, [Formula: see text], and attenuation [Formula: see text]) and electrical resistivity measurements. We used three cores from an outcrop sandstone sample extracted at 0°, 45°, and 90° angles with respect to the visible geologic bedding plane and subjected them to unloading/loading cycles with variations of the confining (20–35 MPa) and pore (2–17 MPa) pressures. Our results indicate that stress field orientation, loading history, rock fabric, and the measurement scale all affect the elastic and electrical anisotropies. Strong linear correlations ([Formula: see text]) between [Formula: see text], [Formula: see text], and resistivity in the three considered directions suggest that the stress orientation similarly affects the elastic and electrical properties of poorly consolidated, high-porosity (shallow) sandstone reservoirs. However, resistivity is more sensitive to pore-pressure changes (effective stress coefficients [Formula: see text]), whereas P-wave properties provide simultaneous information about the confining (from [Formula: see text], with n slightly less than 1) and pore pressure (from [Formula: see text], with n slightly greater than 1) variations. We found n is also anisotropic for the three measured properties because a more intense and rapid grain rearrangement occurs when the stress field changes result from oblique stress orientations with respect to rock layering. Altogether, our results highlighted the potential of joint elastic-electrical stress-dependent anisotropy assessments to enhance the geomechanical interpretation of reservoirs during production or injection activities.
Fine-scale velocity distribution revealed by datuming of very-high-resolution deep-towed seismic data: Example of a shallow-gas system from the western Black Sea
Authors: Colin Florent , Ker Stéphan , Marsset Bruno
Published: June 2020

Very-high-resolution (VHR) marine seismic reflection helps to identify and characterize potential geohazards occurring in the upper part (300 m) of the subseafloor. Although the lateral and vertical resolutions achieved in shallow water depths ([Formula: see text]) using conventional surface-towed technology are adequate, these resolutions quickly deteriorate at greater water depths. The SYstème SIsmique de Fond (SYSIF), a multichannel deep-towed seismic system, has been designed to acquire VHR data (frequency bandwidth [220–1050 Hz] and vertical resolution of 0.6 m) at great water depths. However, the processing of deep-towed multichannel data is challenging because the source and the receivers are constantly moving with respect to each other according to the towing configuration. We have introduced a new workflow that allows the application of conventional processing algorithms to extended deep-towed seismic data sets. First, a relocation of the source and receivers is necessary to obtain a sufficiently accurate acquisition geometry. Variations along the profile in the depth of the deep-towed system result in a complex geometry in which the source and receiver depth vary separately and do not share the same acquisition datum. We have designed a dedicated datuming algorithm to shift the source and receivers to the same datum. Thus, the procedure allows the application of conventional processing algorithms to perform velocity analysis and depth imaging and therefore allows access to the full potential of the seismic system. We have successfully applied this methodology to deep-towed multichannel data from the western Black Sea. In particular, the derived velocity model highlights shallow gas charged anticline structures with unrivaled resolution.
Rational approximation of P-wave kinematics — Part 2: Orhorhombic media
Authors: Abedi Mohammad Mahdi
Published: June 2020

Orthorhombic anisotropy is a modern standard for 3D seismic studies in complex geologic settings. Several seismic data processing methods and wave propagation modeling algorithms in orthorhombic media rely on phase-velocity, group-velocity, and traveltime approximations. The algebraic simplicity of an approximate equation is an important factor in these media because the governing equations are more complicated than transversely isotropic media. To approximate the P-wave kinematics in acoustic orthorhombic media, we have developed a new 3D general functional equation that has a simple rational form. Using the general form, we adopt two versions of rational approximations for the phase velocity, group velocity, and traveltime. The first version uses a simpler functional form and parameter definition within the orthorhombic symmetry planes. The second version is more accurate, using one parameter that is defined out of the symmetry planes. For the phase velocity, we obtain another approximation that is no longer rational but is still algebraically simple, exact for 3D transversely isotropic media, and it is exact within the symmetry planes of orthorhombic media. We find superior accuracy in our approximations compared with previous ones, using numerical studies on multiple moderately anisotropic orthorhombic models. We investigate the effect of the negative anellipticity parameters on the accuracy and find that, in models in which the error of the existing most accurate approximations exceeds 2%, the error of the new approximations remains below 0.2%. The adopted approximations are algebraically simpler and stably more accurate than existing approximations; therefore, they may be considered as attractive alternatives for the existing approximations in many practical applications. We extend the applicability of our approximations by using them to obtain the equations of group direction as a function of phase direction and vice versa, which are useful in wave propagation modeling methods.
Analysis of vertical position relationships between igneous sills and an unconformity surface — Interpretation of seismic profiles from the Northern Tarim Basin, NW China
Authors: Ji Tianyu , Yang Wei , Pu Renhai , Wu Xueqiong , Wu Xiaochuan
Published: June 2020

Sill emplacement mechanisms are very complex, diverse, and regional, and insights from sill reflections are helpful for understanding the emplacement process of magma in the Tarim Basin. This study takes advantage of high-quality 2D seismic data, which are rarely used to study sills in the Tarim Basin, to analyze the sills’ geometric characteristics, plan-view distributions, emplacement timing, and emplacement mechanisms with unconformity surfaces. In the seismic-reflection profiles of the middle-upper Ordovician in the North depression and the southern part of the Tabei uplift in the Tarim Basin, sills with strong positive polarity reflections appear, and they are closely distributed near the Tg52 unconformity surface, which represents the interface between Middle Ordovician limestone and Upper Ordovician mudstone. According to the vertical position of the sills relative to the unconformity, we can divide the sills into saucer-shaped or quasi-saucer-shaped sills above the unconformity surface, sill complexes and saucer-shaped sills on the unconformity surface, and saucer-shaped sills below the unconformity surface. Potential hydrothermal vents and peripheral faults associated with sill intrusion terminate upward in the Middle Permian strata, suggesting that these sills formed in the Middle Permian. Sills with inner flat sheets on the Tg52 unconformity surface formed when the magma ascended and encountered an abrupt change in the fracture toughness and tensile strength between the two adjacent host rock layers. The sills above and on the Tg52 unconformity surface overlap or are vertically linked; therefore, the sills above the Tg52 unconformity surface are the result of the continuous upward expansion of the sills on the unconformity surface, forming sill complexes. Our findings further confirm that unconformities are important interfaces that affect the emplacement of sills.
Quantitative identification of coal texture using the support vector machine with geophysical logging data: A case study using medium-rank coal from the Panjiang, Guizhou, China
Authors: Xiao Zhenghui , Jiang Wei , Sun Bin , Cao Yunjiang , Jiang Lei , Cao Taotao , Yang Qing , Huang Cailun , Yang Xiansheng , Huang Xiangkuan
Published: June 2020

Coal texture is important for predicting coal seam permeability and selecting favorable blocks for coalbed methane (CBM) exploration. Drilled cores and mining seam observations are the most direct and effective methods of identifying coal texture; however, they are expensive and cannot be used in unexplored coal seams. Geophysical logging has become a common method of coal texture identification, particularly during the CBM mining stage. However, quantitative methods for identifying coal texture based on geophysical logging data require further study. The support vector machine (SVM), a machine-learning method, has received great interest due to its remarkable generalization performance, and it has been used to quantitatively identify hard and soft coal using geophysical logging data. In this study, four well-logging curves, the acoustic time difference (AC), caliper log (CAL), density (DEN), and natural gamma (GR), were used for coal texture analysis. Hard coal (undeformed and cataclastic coal) exhibited higher DEN, GR, lower CAL, and lower AC than soft coal. The accuracy rate of coal texture identification was highest (97%) when the linear kernel function was applied, and the maximum training accuracy rate was achieved when the penalty parameter value of the linear kernel increased to 1. The results of verification with a newly cored CBM exploration well indicated that the SVM-based identification method was effective for coal texture analysis. With the increasing availability of data, this method can be used to distinguish hard and soft coal in a coal-bearing basin under numerous sample learning conditions.
Rotating Control on Robots Indonesian Abu Robot Contest with PID and IMUBNO055 Controls
Authors: Febriawan Anggit , Aji Wahyu Sapto
Published: June 2020

One of the problems solved in robot control is that the required robot movement system can be moved efficiently. Controls used to increase the efficiency of robot motion are the PID (Proportional-Integral-Derivative) Control and the IMU BNO055 sensor. The concept used by the robot to be able to rotate to a certain angle entered the desired angle, then read the sensor angle BNO055 then the results of the sensor readings are sent to Arduino to then provide a signal to drive the motor. The results of research that has been done, the robot can display an angle of 0o and 180o in accordance with the sensor readings. The robot can rotate with a short effective time from 10 times of testing and with an average time of 2 seconds. From the research results, the robot can rotate to the desired angle effectively and the robot can choose the desired angle with the help of instructions with an average error of 0.88%. The best control parameter values are Kp = 1; Ki = 0,00095; and Kd = 4.Salah satu masalah yang dihadapi dalam kendali robot yaitu sistem gerakan robot yang mengharuskan dapat bergerak secara efisien. Kendali yang digunakan untuk meningkatkan efisiensi gerakan robot adalah dengan Kendali PID (Proporsional-Integral-Derivatif) dan sensor IMU BNO055. Konsep yang digunakan robot agar dapat berotasi ke sudut tertentu yaitu memasukkan sudut yang diinginkan, kemudian membaca sudut sensor BNO055 kemudian hasil dari bacaan sensor dikirim ke Arduino untuk selanjutnya memberikan sinyal untuk menggerakkan motor. Hasil penelitian yang sudah dilakukan, robot dapat menampilkan sudut 0o dan sudut 180o sesuai dengan pembacaan sensor. Robot dapat berotasi dengan efektif dengan waktu yang singkat dari 10 kali pengujian dan dengan rata – rata waktu yaitu 2 detik. Dari hasil penelitian robot dapat berotasi ke sudut yang diinginkan dengan efektif dan robot dapat menunjukkan sudut yang diinginkan dengan bantuan petunjuk dengan cukup baik dengan rata – rata error 0,88%. Nilai parameter pengendali terbaik adalah Kp=1; Ki=0,00095; dan Kd=4.
Pepper Powder Quality Identification System Based on Silent Angle Imagery
Authors: Gusrin Muhaimin , Fadlil Abdul
Published: June 2020

This research identifies the quality of pepper powder using a computer automatically. The research method uses the stationary angle method. The design of this system is done by image processing techniques. The image of ground pepper that has been taken is then cropped to remove the unused portion of the image. The next step is to convert the original image into grayscale and then convert it to binary. The parameter of the stationary angle is when it has an angle of less than or equal to 38 °, the ground pepper includes fine ground pepper. If the angle ranges from 38o to 40o, including medium powdered pepper, and if the angle is greater than 41o, including the texture of coarse pepper powder. Testing 3 different types of samples obtained 40 mesh is 35.18 o; for 20 mesh is 40.46o and 10 mesh is 41.66o. Therefore, it can be seen that the smaller the texture of the size of ground pepper, the finer the quality.Penelitian ini mengidentifikasi kualitas lada bubuk menggunakan komputer secara otomatis. Metode penelitian menggunakan metode sudut diam. Perancangan sistem ini dilakukan dengan teknik pengolahan citra. Citra lada bubuk yang telah diambil selanjutnya di-cropping untuk menghilangkan bagian citra yang tidak terpakai. Langkah selanjutnya adalah citra hasil asli tersebut dikonversi dalam bentuk grayscale dan selanjutnya dikonversi dalam bentuk biner. Parameter sudut diam adalah ketika memiliki sudut kurang dari atau sama dengan 38o, lada bubuk tersebut termasuk lada bubuk yang halus. Jika sudutnya berkisar antara 38o sampai 40o maka termasuk lada bubuk sedang, dan jika sudutnya lebih besar dari 41o maka termasuk tekstur lada bubuk kasar. Pengujian 3 jenis sampel yang berbeda didapatkan 40 mesh adalah 35,18o; untuk 20 mesh adalah 40,46o dan 10 mesh adalah 41,66o. Oleh karena itu dapat diketahui bahwa semakin kecil tekstur ukuran lada bubuk, semakin halus kualitasnya.
Shipping Information System in Distribution Warehouses Using a Web-Based Barcode System
Authors: Samara Dony , Mushlihudin Mushlihudin
Published: June 2020

One of the data in the industrial process is information on shipping goods in a distribution warehouse. This study proposes a web-based freight information system in a distribution warehouse with a barcode system as the naming management of goods. The barcode reading system uses a barcode scanner as a barcode label reader, with an Arduino microcontroller device and NodeMCU as a controller and communication device with the web. The localhost web-based information system was built using the XAMPP application. Display information system using a simple display on the browser page. The results obtained in this study have successfully built a barcode-based goods delivery management system, information about the goods is coded into a barcode. The barcode reading system has successfully read and communicated with the web, with experiments conducted using 100 barcode labels, the success of reading and sending data has shown good results. Goods delivery information system in a web-based distribution warehouse has also been successfully built with an average data storage time of 5.5 seconds.Salah satu data dalam proses industri yaitu informasi pengiriman barang di gudang distribusi. Penelitian ini mengusulkan sebuah sistem informasi pengiriman barang berbasis web di sebuah gudang distribusi dengan sistem barcode sebagai manajemen penamaan barang. Sistem pembacaan barcode menggunakan barcode scanner sebagai pembaca label barcode, dengan perangkat mikrokontroler Arduino dan NodeMCU sebagai perangkat kontroler dan komunikasi dengan web. Sistem informasi berbasis web localhost dibangun menggunakan aplikasi XAMPP. Tampilan sistem informasi menggunakan tampilan sederhana di halaman browser. Hasil yang didapatkan dalam penelitian ini adalah telah berhasil dibangun sistem manajemen pengiriman barang berbasis barcode, informasi mengenai barang dikodekan kedalam bentuk barcode. Sistem pembacaan barcode telah berhasil membaca dan berkomunikasi dengan web, dengan percobaan yang dilakukan menggunakan 100 label barcode keberhasilan pembacaan dan pengiriman data telah menunjukkan hasil yang baik. Sistem informasi pengiriman barang di gudang distribusi berbasis web telah berhasil pula dibangun dengan lama penyimpanan data rata – rata 5,5 detik.
Education and the childbearing woman and her family
Authors: Lindsay Pat
Published: June 2020

The antenatal period is an ideal time to provide pregnant women and their families with focused health education. For many parents, this will be the first time they have had close and continuing contact with healthcare professionals. They are also embarking on a journey about which they may know little. As a result, most parents are receptive to information about pregnancy and childbirth, and the public health messages that help improve their health and safety. Maternity support workers are an important part of this service, as they are frequently responsible for delivering some of this education and may be tasked with organising and delivering some classes where these are offered.
Research roundup: June 2020
Authors: Odd Dawn , James Natasha
Published: June 2020

In this section, a range of brief synopses of recently published articles that may be of interest to health visitors is presented. The aim of this roundup is to give an overview, rather than a detailed summary, of the research papers selected. Should you wish to look at any of the papers in more detail, a full reference is provided.
Judith Nembhard: A lasting legacy
Authors: Oshikanlu Ruth
Published: June 2020

Ruth Oshikanlu pays tribute to the inspirational life and career of friend and colleague, Judith Nembhard
Newly qualified health visitor: Looking to the future for children and families
Authors: Boddy Bethany
Published: June 2020

Bethany Boddy reflects on her time as a newly qualified health visitor and asks what needs to be done to support the profession moving forwards
Health inequality and public policy
Authors: Forbes Lisa
Published: June 2020

The coronavirus pandemic has been viewed as an issue of life and death; but in light of the current protests against racial discrimination across the world, the same could be said of health inequalities
Public health nurses' experiences of supporting women to breastfeed in community settings in Ireland
Authors: Dunne Sinead , Fallon Anne
Published: June 2020

Support is identified as a key factor in the promotion and duration of breastfeeding. This descriptive qualitative study sought to explore public health nurses' experiences of supporting women to breastfeed in Irish community settings. Semi-structured interviews were conducted using a qualitative descriptive methodology. Braun and Clarke's six-phase thematic analysis was used to analyse the data. Following data analysis, three major themes emerged, which included: ‘To give them the best support’; ‘We need the help and support as well’; and ‘We've only a certain amount of time’. The findings reveal that public health nurses seek to provide the best support to breastfeeding women within the constraints of clinical practice. Although public health nurses perceive that they have internal and external sources of support, more is needed to enable them provide the best care for breastfeeding women in Ireland.
Health visitor service performance in England
Authors: Hancock David
Published: June 2020

Public Health England collects performance indicator data for children's public health services, including health visiting services metrics. What does the latest data reveal?
Mothers who work: What support is available?
Authors: Noakes Amy
Published: June 2020

What can health visitors do to provide mothers with information and support to enable them to remain in the workplace?
Maximal Orientations of Graphs
Authors: Drury Stephen
Published: June 2020

Orientations of connected graphs that maximize the spectral norm of the adjacency matrix are studied, and a conjecture of Hoppen, Monsalve and Trevisan is solved.
The moral maze of food bank use
Authors: Beck David , Gwilym Hefin
Published: June 2020

The foodbank symbolises a changing landscape of social insecurity and welfare conditionality. Attending to decision making within the foodbank system, this article argues that foodbanks, and their referral-system creates a bureaucratic ‘moral maze’ identifying people as ‘deserving’ or ‘undeserving’ of help. Maintaining a moral distance, organised religious foodbanks are reliant upon a complex outsourcing of moral decisions and walk a fine balance between supply (donations) and demand (use). Within this article, we argue that the foodbank landscape is akin to navigating a moral maze, and that this creates, and justifies decisions of deservingness.
Bibliotecas y eficiencia: adaptación del indicador de la potencia del sistema de la metodología Secaba-Rank para nuevas necesidades.
Authors: Lázaro Rodríguez Pedro , López Gijón Javier , Herrera Viedma Enrique
Published: June 2020

Objective: This study has two objectives. The first is to create a new configuration for the System Potency indicator from the Secaba-Rank methodology, which includes measures related to the budget, loans, visits, Internet use and attendance at cultural activities in libraries. The results are then used to obtain information on the efficiency of Spanish public libraries. The second objective is to compare and analyse the results of the ranks based on the new measures of the System Potency indicator. The overall aim is to assess the measurement of the efficiency of libraries in the context of a changing society. Methodology: With regard to the first objective, the method is the adaptation of the System Potency indicator of the Secaba-Rank methodology. This indicator, which has been previously used to analyse efficiency in both Spanish public and university libraries, reports libraries’ outputs and inputs and obtains information on their efficiency. The new System Potency indicator takes into account activities of libraries such as loans, visits, Internet use and attendance at cultural activities. The comparison between the ranks generated for each dimension and the rank based on the total System Potency indicator is carried out by calculating the Spearman's rho correlation coefficient.
Results: The results show that the Secaba-Rank methodology is suitable for studying the efficiency of libraries according to their current role, especially in the analyses comparing loans and visits; Internet use and total efficiency; and attendance at cultural activities and total efficiency. Finally, the results for total efficiency (considering the relationship between the budget and loans, visits, use of the Internet and the attendance at cultural activities), indicate that four systems in Spain were inefficient (Catalonia, Valencia, Andalusia and the Basque Country), while the rest were efficient.
Improved photodynamic anticancer activity and mechanisms of a promising zinc(II) phthalocyanine-quinoline conjugate photosensitizer in vitro and in vivo
Authors: Chen Juanjuan , Wang Yingming , Fang Yuting , Jiang Zhihuan , Wang Aiping , Xue Jinping
Published: June 2020

Since the discovery of photodynamic therapy, scientists have constantly been searching for more effective and ideal photosensitizers (PSs). As part of our ongoing interest in the development of more potent photosensitizers, quinoline-8-yloxy-substituted zinc(II) phthalocyanine (ZnPc-Q1) has been identified as a promising photosensitizers in tumor cells. This study aims to explore the photodynamic mechanism and in vivo photodynamic efficacy of ZnPc-Q1, and further evaluate its potential in clinical photodynamic therapy application. The single crystal structure of ZnPc-Q1 enables the easy control of clinical quality standards. In comparison with Photofrin, ZnPc-Q1 exhibits considerably higher in vitro anticancer activity by dual dose-related mechanisms (antiproliferative and apoptosis). In addition, the in vivo results demonstrate that ZnPc-Q1 exhibits significant tumor regression with less skin photosensitivity by both direct killing and apoptosis anticancer mechanisms. In conclusion, ZnPc-Q1 can be considered to be a promising ideal PS for clinical application owing to its defined chemical structure without phthalocyanine isomerization, good absorption of tissue-penetrating red light, improved photodynamic therapy efficacy, and reduced skin phototoxicity.
Multi scrolls chaotic encryption scheme for CO-OFDM-PON
Authors: Chen Yuanxiang , Huang Yongtao , Han Ying , Fu Jia , Li Kaile , Li Yitong , Yu Jianguo
Published: June 2020

In this paper, we propose and experimentally demonstrate a novel multi scrolls chaotic encryption scheme for CO-OFDM-PON. We analyze the principle of 3-dimension encryption scheme and discuss its encryption complexity. Compared with the previous hyper Chen chaotic encryption scheme, the proposed encryption algorithm can realize dynamic constellation point mapping of QAM signal with lower encryption complexity. We also compare the transmission performances of the two chaotic encryption schemes. The results show that the proposed multi scrolls scheme has better BER performance because it can decrease the peak to average power ratio (PAPR) of OFDM. What is more, the proposed encryption scheme is very sensitive to the initial secure key and a tiny discrepancy as small as 10−17 would lead to a completely different sequence. The high sensibility to the initial value can effectively increase encryption level and the key space of the multi scrolls encryption scheme is 106 times of that hyper Chen. Further, to verify the effectiveness of the proposed encryption algorithm, encrypted transmission of a digital picture in 80 km SSMF is carried out.
Highly sensitive temperature sensing probes based on liquid cladding elliptical micro/nanofibers
Authors: Jin Wa , Li Xia , Wu Shuhui , Fu Xinghu , Fu Guangwei , Bilal Muhammad Musavir , Bi Weihong
Published: June 2020

A highly sensitive temperature probe based on a liquid cladding elliptical micro/nanofiber is proposed, which exploits a fiber loop mirror with an output port probe for remote and highly-sensitive measurements based on evanescent field coupling. The thermo-optical effective liquid cladding avoids the influence of other environmental parameters (except for temperature), while protecting the micro/nanofibers from external disturbance and contamination. This renders the sensing probe only sensitive to temperature changes, making it suitable for real-world temperature measurements. An isopropanol cladding elliptical microfiber with a diameter of 3.4 µm demonstrated a sensitivity of −16.38 nm/°C for a remote temperature measurement.
Performance studies of new optics for the time-of-flight detector of the AFP project
Authors: Nozka Libor , Brandt Andrew , Cerny Karel , Hrabovsky Miroslav , Komarek Tomas , Krizek Filip , Mandat Dusan , Milovanovic Marko , Rijssenbeek Michael , Schovanek Petr , Sykora Tomas , Urbasek Vladimir , Zatloukal Jaromir
Published: June 2020

We present the results of performance studies of the upgraded optical part of the time-of-flight subdetector prototype for the AFP (ATLAS Forward Proton) detector obtained during the test campaign in a synchrotron test-beam facility with 5 GeV electrons at the DESY laboratory (Hamburg, Germany) in June 2019. The detection of the particle arrival time is based on generation of Cherenkov light in an L-shaped fused silica bar. In the previous version of the ToF, all bars were made of two pieces (radiator and light guide) glued together with a dedicated glue (Epotek 305). This solution suffers from additional radiation damage of glue. We adopted a new technique of bar production without the need of glue. The new bars have a higher optical throughput by a factor of 1.6, reduced fragility, and better geometrical precision.
Human gesture recognition under degraded environments using 3D-integral imaging and deep learning
Authors: Krishnan Gokul , Joshi Rakesh , O’Connor Timothy , Pla Filiberto , Javidi Bahram
Published: June 2020

In this paper, we propose a spatio-temporal human gesture recognition algorithm under degraded conditions using three-dimensional integral imaging and deep learning. The proposed algorithm leverages the advantages of integral imaging with deep learning to provide an efficient human gesture recognition system under degraded environments such as occlusion and low illumination conditions. The 3D data captured using integral imaging serves as the input to a convolutional neural network (CNN). The spatial features extracted by the convolutional and pooling layers of the neural network are fed into a bi-directional long short-term memory (BiLSTM) network. The BiLSTM network is designed to capture the temporal variation in the input data. We have compared the proposed approach with conventional 2D imaging and with the previously reported approaches using spatio-temporal interest points with support vector machines (STIP-SVMs) and distortion invariant non-linear correlation-based filters. Our experimental results suggest that the proposed approach is promising, especially in degraded environments. Using the proposed approach, we find a substantial improvement over previously published methods and find 3D integral imaging to provide superior performance over the conventional 2D imaging system. To the best of our knowledge, this is the first report that examines deep learning algorithms based on 3D integral imaging for human activity recognition in degraded environments.
Individual inscription of spectrally multiplexed Bragg gratings in optical multicore fibers using small spot direct UV writing
Authors: Jantzen Senta L. , Bannerman Rex H. S. , Jantzen Alexander , Mennea Paolo L. , Smith Devin H. , Gates James C. , Boyd Lewis J. , Smith Peter G. R. , Holmes Christopher
Published: June 2020

We have demonstrated the inscription of Bragg gratings into five individual cores of a seven core fiber using small spot direct UV writing. With this technique, we defined spectrally multiplexed Bragg gratings consecutively in separate cores as well as spectrally multiplexed gratings at the same longitudinal location in different cores. The effect of bending on the optical spectrum was evaluated to allow the differentiation between cross-exposure and cross-talk, and an alignment process to reduce cross-exposure by 13 dB was found.
Hospital Response to COVID-19
A Consensus Report on Ain Shams University Hospital Strategy
Authors: Badawy Abdelfattah Eman , Ahmed samar , El-Zahapy Hany , El Said Amr , Salem Sameh , Tharwat Ayman , Dabous Hesham , Dabous Hany , Mostafa Yasser , Madkour Ashraf , Said Hebatallah , Mansour Ossama , Samir Shahira , Abdou Samia , Saleh Ayman , Omar Ashraf , Saoud Abd El-Fattah , Tag El-Din Mohamed Awad , El-Meteini Mahmoud
Published: June 2020

Socioeconomically disadvantaged people are more frequent users of healthcare, as are the elderly. This situation is now disrupted with the rapid onset COVID-19 pandemic and its effect on the health system. Amidst a great deal of uncertainty and mixed messages from the WHO, Ministries of health and scientific communities, a methodology to keep the standard operating procedures of the school needs to be in place in order to allow the hospital to respond to its catchment area requirements.

A number of focus groups and planning sessions were conducted using a purposeful sample of service providers in Ain Shams University Hospitals. A set of three guiding documents were generated and tested for agreeability and utility.

All hospitals need to join forces to systematically organize the chaotic situation we are living with this post COVID-19 pandemic.
Reimplementation and Performance Evaluation of a Lock-free Queue with Batching
Authors: Mirschel John , Rigby Timothy , Motta Daniel
Published: June 2020

This paper describes an implementation of a lock-free queue that utilizes batching to increase performance by up to 16x over standard lock-free queues. We attempted to implement the design and algorithms from the original research paper BQ: A Lock-Free Queue with Batching and tried to reproduce similar functionality and performance. The original implementation of this data structure was done in C++, but we wanted to try and build this in Java so we could compare the results of how the data structure performs in two different languages.
H infinity and Mu -synthesis Design of Coupled Tanks Level Control
Authors: jibril mustefa , Tadese Messay , Alemayehu Eliyas
Published: June 2020

In this paper, the design and analysis of coupled tank water level control system is done using robust control theory. The main aim of this work is to improve level controlling mechanisms in industries and household areas. In this paper, H and μ synthesis controllers are designed to improve the level control system. The coupled tank water level control system is designed using the proposed controllers comparison and tested for tracking a reference level signals (step, sine wave and random) and simulation results have been analyzed successfully. Finally the comparative simulation results prove the effectiveness of the proposed coupled tank water level control system with H controller for improving the tracking mechanism performance of the system.
Determinants of Fertility Rate: a regression analysis case of Tunisia
Authors: Mohamed Taher Sassi
Published: June 2020

The objective of this paper is to investigate the determinant of the Tunisian fertility rates over the time period from 1960 to 2015. A Multivariate regression model has been used on various socioeconomic variables using a data base collected from World Bank (2015). The result has confirmed the previous output of the literature concerning the negative relationship of Education, Economic Growth, and Urbanization to fertility rates. The new results was that female Employment and Political Stability could also affect the fertility rates negatively. The Male employment variable had a positive relationship with the dependent one. Although many other factors were influencing the lowering rates over time in Tunisia, the main reason for a decrease in fertility rates defined by this paper is the development of the education system after the independence. Expanding womens rights in term of education and employment, the urbanization factor and going from rural to modern women, also had a negative impact on the rates over time, as well as the inclusion of female labor force into the economy. All these significant factors have made Tunisia an exception in the Arab countries that have implemented a policy and tools to birth control. This demographic change resulting in smaller family size might also be one of the indirect reasons that conducted the country to be the first nation starting the Arab Spring through the revolution of January 2011.
Modelling Design and Control of an Electromechanical Mass Lifting System using Optimal and Robust control Method
Authors: jibril mustefa , Tadese Messay , Alemayehu Eliyas
Published: June 2020

In this paper, an electromechanical mass lifter system is designed, analyzed and compare using optimal and robust control theories. LQR and Mu-synthesis controllers are used to improve the lift displacement by comparison method for tracking the desired step and sinusoidal wave signals input. Finally, the comparison simulation result prove the effectiveness of the electromechanical mass lifter system with Mu-synthesis controller for improving the rise time, percentage overshoot, settling time and peak value of tracking the desired step displacement signal and improving the peak value for tracking the desired sinusoidal displacement signal with a good performance.
Spatial othering: Examining residential areas, school attendance zones, and school discipline in an urbanizing school district
Authors: Mawene Dian , Bal Aydin
Published: June 2020

Drawn from interdisciplinary perspectives of special education, critical geography, and education policy, in this study, we examined the spatial patterns of residential areas, school attendance zones, and school discipline rates of an urbanizing school district in Wisconsin to understand the construction of spatial “Other.” We measured the city’s dissimilarity index to examine racial and economic segregation between neighborhoods and elementary schools. We also measured the school district suspension rates to examine racial disproportionality in school discipline. We then analyzed to what extent the redrawing of elementary school attendance zones in the 2007-2008 school year was able to reduce the spatial concentration of racially and economically minoritized students in one elementary public school. We found that despite the well-intentioned efforts of the rezoning committee to lower the percentage of students from low-income families, spatial othering at the neighborhood level continued to funnel students from racially and minoritized backgrounds into the school, due to the concentration of low-income housing in the neighborhood of the school.
Development of Islamic Religion’s Impact on Sport Activities Scale
Authors: Taş Zeki , Hergüner Gülten , İmamoğlu Abdulvahit , Yaman Çetin , Zengin Mahmut , Üzüm Hanifi , Karlı Ünal
Published: June 2020

This research was carried out with the aim of developing a Likert-type measurement tool which measured the influence of the Islamic religion on the attitudes and behaviors of the individuals participating in sports activities. Explanatory and confirmatory factor analyzes were carried out for the scale called “Islamic Religion’s Impact Scale in Sportive Activities”. Alpha values ​​of the sub-dimensions of the scale were determined as α = 0.90 for Motivation dimension, α = 0.90 for Moral dimension, α = 0.92 for Autocontrol dimension, α = 0.90 for Clothing dimension, α = 0.89 for Opposite sex dimension and α = 0.53 for Participation dimension It was. The total Alpha value of the scale was found to be α = 0.95. Positive and moderate strong relationships were determined between the sub-dimensions of the scale. As a result, the scale in which the development study is conducted can be used.

​Extended English summary is in the end of Full Text PDF (TURKISH) file.

Özet

Bu araştırma sportif faaliyetlere katılan bireylerin tutum ve davranışları üzerinde İslam Dininin etkisini ölçen likert türü bir ölçme aracı geliştirmek amacı ile yapılmıştır.  “Sportif Faaliyetlerde İslam Dini Etki Ölçeği” (SFİDEÖ) olarak adlandırılan ölçek için açıklayıcı ve doğrulayıcı faktör analizleri yapılmıştır. Ölçeğin alt boyutlarının alfa değerleri, Motivasyon boyutu için α=0.90, Ahlak boyutu için α=0.90, Otokontrol boyutu için α=0.92, Kıyafet boyutu için α=0.90, Karşı cins boyutu için α=0.89 ve Katılım boyutu için α=0.53 olarak tespit edilmiştir. Ölçeğin toplam Alfa değeri ise α=0.95 olarak bulunmuştur. Ölçeğin alt boyutları arasında pozitif yönde orta ve yüksek düzeyde güçlü ilişkiler tespit edilmiştir P<0,01. Sonuç olarak geliştirme çalışması yapılan ölçek, araştırmanın amacına uygun olarak ölçmek istenilen özellikleri ölçen likert türü geçerli ve güvenilir bir ölçek olarak kullanılabilir.
Determination of the perceptions of the sports sciences faculty students regarding concept of exam: A metaphor analysis study
Authors: Çelik Okan Burçak
Published: June 2020

The aim of this research is to determine perceptions of sports sciences faculty students regarding concept of exam through metaphors. The study group of the research consisted of 38 sports sciences faculty students. In order to collect data, a metaphor form was prepared to determine the perceptions of the participants regarding the concept of exam. In the research, phenomenological model, one of the qualitative research methods, was used. Content analysis technique was used in the analysis of the data. For the reliability of the analysis of the research data, the coefficient of reliability intercoder was calculated as 88%. It was observed that the students of the sports sciences faculty produced a total of 33 metaphors. Produced metaphors were gathered in 3 categories. These categories are anxiety (16 metaphor), obstacle (9 metaphor) and race (8 metaphor). The metaphors produced most by the participants were determined as stress, marathon and trouble respectively. For the concept of the exam, the analogies made to animals (snake, spider, vulture, vampire) known as scary in nature drawn attention. ​Extended English summary is in the end of Full Text PDF (TURKISH) file.   Özet Bu araştırmanın amacı, spor bilimleri fakültesi öğrencilerinin sınav kavramına ilişkin sahip oldukları algıları metaforlar yardımıyla belirlemektir. Araştırmanın çalışma grubunu 38 spor bilimleri fakültesi öğrencisi oluşturmuştur. Veri toplamak amacıyla katılımcılara sınav kavramına ilişkin sahip oldukları algılarını belirlemek için metafor formu hazırlanmıştır. Araştırmada, nitel araştırma yöntemlerinden olgubilim deseni kullanılmıştır. Verilerin analizinde ise içerik analizi tekniği kullanılmıştır. Araştırma verilerinin analizinin güvenirliği için katılımcılar arası güvenirlik kat sayısı %88 olarak hesaplanmıştır. Verilerin değerlendirilmesiyle, spor bilimleri fakültesi öğrencilerinin toplam 33 metafor ürettikleri görülmüştür. Üretilen bu metaforlar 3 kategoride toplanmıştır. Bu kategoriler, kaygı (16 metafor), engel (9 metafor) ve yarış (8 metafor) kategorileridir. Katılımcıların en fazla ürettiği metaforlar stres, maraton ve dert şeklinde sıralanmıştır. Sınav kavramı için doğada ürkütücü olarak bilinen hayvanlara (yılan, örümcek, akbaba, vampir) yapılan benzetmeler dikkati çekmiştir.
Porezekcinio tiesiosios žarnos sindromo dažnis naudojant žemos priekinės tiesiosios žarnos rezekcijos skalę (LARS skalę)
Authors: Dulskas Audrius , Smolskas Edgaras , Kilius Alfredas , Čižauskaitė Agnė , Samalavičius Narimantas Evaldas
Published: June 2020

Įvadas Iki 90 proc. pacientų, operuotų dėl tiesiosios žarnos navikų, skundžiasi padažnėjusio tuštinimosi epizodais, nesulaikomu noru tuštintis, įvairaus laipsnio išmatų nelaikymu. Visai neseniai tuštinimosi sutrikimų skalė šiems simptomams vertinti buvo iš­versta į lietuvių kalbą ir patvirtinta naudoti klinikinėje praktikoje.Tyrimo tikslas Mūsų tikslas buvo nustatyti porezekcinio tiesiosios žarnos sindromo (ARS) pasireiškimo dažnį ir sunkumą pacientams po tie­siosios žarnos rezekcijos bei išsiaiškinti rizikos veiksnius.Metodai Porezekcinio tiesiosios žarnos sindromo skalė buvo išsiųsta 183 pacientams, kuriems nuo 2008 m. sausio 1 d. iki 2012 m. gruodžio 31 d. Nacionaliniame vėžio institute buvo atlikta tiesiosios žarnos rezekcija su totaline mezorektaline ekscizija su­formuojant žarnos jungtį. Iš jų skalę užpildė 111 (atsakomumas – 60,7 %). Kartu tyrėme šiuos galimus blogesnės tuštinimosi funkcijos rizikos veiksnius: lytis, amžius, naviko aukštis, priešoperacinis spindulinis gydymas, laikas po operacijos.Rezultatai Iš 111 užpildytų klausimynų 108 buvo užpildyti tinkamai (59 %). 27 pacientams (25 %) ARS nepasireiškė, 26 (24 %) pasireiškė silpnas ARS, o net 55 (56 %) – ryškus. Išanalizavę rizikos veiksnius nustatėme, jog tik laikas po operacijos buvo lemiamas veiks­nys ARS po operacijos pasireikšti (ilgesnis laikas, ne tokie ryškūs simptomai).Išvados Daugiau nei pusei pacientų atsirado ryškus tuštinimosi sutrikimas ir tik ketvirtadalis neturėjo jokių skundų. Laikas, praėjęs nuo operacijos, buvo vienintelis teigiamas veiksnys šiems simptomams susilpnėti.
In memoriam chirurgui Romanui Kęstučiui Drąsučiui
Authors: Poškus Tomas
Published: June 2020

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O lado “B” de Evandro Teixeira: fotografia e resistência nos Cadernos Culturais do Jornal do Brasil (1963-1979)
Authors: De Lima Reginâmio Bonifácio
Published: June 2020

Este artigo é o primeiro resultado de pesquisa que tem como objeto a análise das críticas e resistências nas fotografias de Evandro Teixeira publicadas na Capa do Caderno de Cultura intitulado “Caderno B” do Jornal do Brasil, durante o regime civil-militar. O foco de análise se concentra mais precisamente no período de participação do fotógrafo no “Caderno de Cultura”, que se dá de março de 1963 até a Anistia, em agosto de 1979. Consideramos a expressão dos discursos visuais como enfoque principal e os discursos verbais como aporte de sustentação para analisar as representações jornalísticas. Apresentamos uma breve abordagem sobre a importância do “Caderno B” para a cultura na imprensa jornalística nacional, seguida de uma contextualização do trabalho do fotógrafo Evandro Teixeira para compreender, ainda que parcialmente, sua trajetória. Apesar de bastante explorada em trabalhos científicos, raros são os estudos sobre o fotógrafo dedicados a enfatizar a percepção da inserção de suas fotos nos cadernos culturais; fotografias que extrapolam a cultura e os atos da alta sociedade carioca para denúncias e críticas ao sistema então vigente. As fotos de Evandro Teixeira e as notícias que as acompanham demonstram, por vezes, proximidade com o discurso midiático do drama. O discurso simplificado, muitas vezes de formato afetivo, trazia à luz uma mensagem que pudesse ser facilmente captável pelos leitores. O tempo parece fluir em suas fotos, como se o passado fosse presentificado, ou ainda, como se houvesse uma espiral a confluir ora para frente, ou de outro ângulo, ora para o retorno a um evento que parece ser novamente o que outrora fora, só que diferente – ou ambos ao mesmo tempo, na tessitura de uma rede temporal.