bluuebunny/crossref_metadata_2025_split huggingface dataset:
Re-Design of Mine Tailings Storage Facility for Adamus Resources Limited
Authors: Owusu-Yeboah B. , Mireku Gyimah D. , Akayuli C. F. K. 
Published: July 2020

AbstractThe suitability of a centerline or upstream design as a sustainable option for construction of future raises for the existing Life of Mine (LoM) downstream Tailings Storage Facility (TSF) at Adamus Resources Limited (ARL) was investigated using Slope/W in GeoStudio Software. Review of technical information, evaluation of the performance of the existing Stage 6 dam, and geotechnical investigations of available construction materials were undertaken in this research. Insights were gained about the TSF’s life cycle and current bearing capacity for intended future raises. Viable geotechnical parameters were established to define construction material specifications as well as input data for modelling the new designs. The British Standards Institute (BSI) standards were adopted for all the material testing protocols carried out at the Council for Scientific and Industrial Research-Building and Road Research Institute (CSIR-BRRI) laboratory in Kumasi. The scope of modelling covered the original downstream as well as the centerline and upstream options. The geometric design and stability analysis focused only on the southern and northern embankments of the TSF. The modelling outputs yielded reliable Stability Factors of Safety (FoS) for all designs investigated, above the regulatory criteria. Subsequently, a semi-quantitative multi-criteria evaluation was used to select the preferred option between the centreline and upstream alternatives. The results showed that technically, economically and by regulatory compliance, the centreline design is a better alternative and therefore recommended for adoption by ARL. Keywords: Tailings Storage Facility, Geotechnical Parameters, Stability Analysis, Modelling, Multi-Criteria
Effects of Maturity of Coconut Shells on Gold Adsorption Efficiencies of Derived Activated Carbons
Authors: Buah W. K. , Darmey J. , Osei F. 
Published: July 2020

AbstractCoconut shells are used as precursors for preparation of activated carbons. The shells could vary in terms of their maturity. The influence of the maturity of the shells on gold adsorption efficiencies of derived activated carbons (ACs) from gold di-cyanide solution was investigated. The shells were pyrolysed at 900 ºC and the resulting chars were activated in steam at the same temperature for different durations. Assessment of the properties of the derived ACs revealed that; the hardness, gold adsorption capacities and rates of gold adsorption of the ACs depended on the maturity of the shells. The more matured the shells the harder the AC. The relative hardness and gold adsorption rates of the mature coconut shells activated carbons, HMand RM, respectively and those of the less mature shells, HLand RL, respectively were in the order of HM >HL and RM >RL. The relative hardness of the ACs derived from the more mature and less mature shells after 3 hrs activation were 99.3% and 94.0%, respectively and the gold adsorption rates were 5.78 mg Au/hr/gand 4.95 mg Au/hr/g, respectively. The adsorption rates and relative hardness depended on the duration of activation, where longer activation times resulted in increase in the adsorption rates and a decrease in relative hardness of the derived ACs. Keywords: Adsorption, Activated Carbon, Coconut Shells, Maturity, Relative Hardness
Performance Evaluation of Training Algorithms in Backpropagation Neural Network Approach to Blast-Induced Ground Vibration Prediction
Authors: Arthur C. K. , Temeng V. A. , Ziggah Y. Y. 
Published: July 2020

Abstract
Backpropagation Neural Network (BPNN) is an artificial intelligence technique that has seen several applications in many fields of science and engineering. It is well-known that, the critical task in developing an effective and accurate BPNN model depends on an appropriate training algorithm, transfer function, number of hidden layers and number of hidden neurons. Despite the numerous contributing factors for the development of a BPNN model, training algorithm is key in achieving optimum BPNN model performance. This study is focused on evaluating and comparing the performance of 13 training algorithms in BPNN for the prediction of blast-induced ground vibration. The training algorithms considered include: Levenberg-Marquardt, Bayesian Regularisation, Broyden–Fletcher–Goldfarb–Shanno (BFGS) Quasi-Newton, Resilient Backpropagation, Scaled Conjugate Gradient, Conjugate Gradient with Powell/Beale Restarts, Fletcher-Powell Conjugate Gradient, Polak-Ribiére Conjugate Gradient, One Step Secant, Gradient Descent with Adaptive Learning Rate, Gradient Descent with Momentum, Gradient Descent, and Gradient Descent with Momentum and Adaptive Learning Rate. Using ranking values for the performance indicators of Mean Squared Error (MSE), correlation coefficient (R), number of training epoch (iteration) and the duration for convergence, the performance of the various training algorithms used to build the BPNN models were evaluated. The obtained overall ranking results showed that the BFGS Quasi-Newton algorithm outperformed the other training algorithms even though the Levenberg Marquardt algorithm was found to have the best computational speed and utilised the smallest number of epochs.

Keywords: Artificial Intelligence, Blast-induced Ground Vibration, Backpropagation Training Algorithms
Detoxification of Cyanide Wastewater by Cyanotrophic Organisms: the case of Phanerochaete chrysosporium
Authors: Ofori-Sarpong G. , Adam A. - S. , Amankwah R. K. 
Published: July 2020

Abstract
Cyanide, a carbon-nitrogen radical, is a major building block in many industries including pharmaceuticals, petrochemical and gold processing. In the gold extraction industry, cyanide has been the universal lixiviant for over a century due to better understood process chemistry, among others. Industries that discharge cyanide-laden effluents are mandated to keep concentrations below 0.2 mg/L to prevent death by cyanide-intoxification, which occurs when cyanide binds to key iron-containing enzymes and prevent them from supplying oxygen-containing blood to the tissues. Techniques used to attenuate cyanide in wastewater can broadly be grouped into chemical, physical and biological methods. In recent times, attention has been placed on biotechnological methods, which make use of cyanotrophic microorganisms to clean up cyanide-contaminated environments. This paper reports on studies set out to assess the ability of Phanerochaete chrysosporium to degrade cyanide under different conditions including changes in cyanide concentration, culture mass, time, closed system and open system. At the end of 24-hour contact in an open agitated system with initial pH of 11.5, a control experiment using 100 mg/L cyanide revealed a natural attenuation of 15% with pH decreasing to 9.88, while the best myco-detoxification of 85% was achieved by contacting 100 mg/L cyanide with 0.5 g culture mass, translating into degradation capacity of 17.2 mg/g (milligram of cyanide per gram of culture) with pH reducing to 8.4 in 24 hours. The degradation could be based on a number of mechanisms including hydrolysis to HCN, oxidation to cyanyl radical and cyanate due to natural attenuation through atmospheric contact, and secretion of organic acid, oxidative enzymes, and hydrogen peroxide by the fungus.

Keywords: Cyanotrophic Organism, Myco-Detoxification, Cyanide-Laden Effluents, pH
Estimation of Soil Erosion Using RUSLE Model and GIS: The Case of Satinskyi Catchment, Western Rwanda
Authors: Byizigiro R. V , Rwanyiziri G , Mugabowindekwe M. , Kagoyire C. , Biryabarema M. 
Published: July 2020

The problem of soil erosion in Rwanda has been highlighted in previous studies. They have shown that half of the country’s farmland suffers moderate to severe erosion, with the highest soil loss rates found in the steeper and highly rainy northern and western highlands of the country. The purpose of this study was to estimate soil loss in Satinskyi, one of the catchments located in Ngororero District of Western Rwanda. This has been achieved using the Revised Universal Soil Loss Equation (RUSLE) model, which has been implemented in a Geographic Information Systems (GIS) environment. The methods consisted of preparing a set of input factor layers including Slope Length and Steepness (LS) factor, Rainfall Erosivity (R) factor, Soil Erodibility (K) factor, Support Practice (P) factor, and Land Surface Cover Management Factor (C) factor, for the model. The input factors have been integrated for soil loss estimates computation using RUSLE model, and this has enabled to quantitatively assess variations in the mean of the total estimated soil loss per annum in relation to topography and land-use patterns of the studied catchment. The findings showed that the average soil loss in Satinskyi catchment is estimated at 38.4 t/ha/year. It was however found that about 91% of the study area consists of areas with slope angle exceeding 15°, a situation which exposes the land to severe soil loss rates ranging between 31 t/ha/year and 41 t/ha/year. Apart from the steep slope, changes in land use also contribute to high rates of soil loss in the catchment.
Keywords: Soil Erosion Estimation, GIS, RUSLE, Satinskyi Catchment, Rwanda
PERAN RADIO KOMUNITAS DWIJENDRA 107.7 FM DALAM PENGEMBANGAN SIARAN KEARIFAN LOKAL BALI
Authors: Gede Bagus Anak Agung 
Published: July 2020

Radio community is one of the broadcasting institutions which legalized the existence of Broadcasting Law No.32 of 2002. According to Broadcasting Law No. 32 of 2002 article 13, providers of broadcast services (television and radio). The problem is how the role of the Dwijendra Radio Community 107.7 FM Broadcast Local Wisdom of Bali, the purpose of this study is to find out how the role of community radio as a medium for the development of local wisdom broadcasts. This research is descriptive qualitative, the subject of this research is the person in charge of broadcasting local wisdom broadcasts, data collection techniques are done by interview techniques, observation techniques, and documentation techniques. The results showed that the role of community radio as an educational medium is manifested in the form of broadcast programs that elevate local culture, manifested through broadcast programs that are arranged and presented in a creatively packaged program. The local wisdom broadcast of Radio Community Dwijendra 107.7 fm is an event Gegitaan. Where the event was broadcast during the daytime 12.05-14.00 wita.
MANAJEMEN MEDIA PENYIARAN RADIO TELEVISI TIMOR LESTE SEBAGAI LEMBAGA PENYIARAN PUBLIK
Authors: Putra dalem Anak agung gede agung , De Given Fatima Lay Lucia Natalia 
Published: July 2020

Manajemen merupakan ilmu dan seni dalam merencanakan, mengorganisir, mempengaruhi orang lain atau kelompok untuk melaksanakan penyiaran radio dan TV, untuk mencapai tujuan secara efektif dan efisien. Adapun beberapa rumusan masalah yang ingin di bahasa, antara lain Bagaimanakah manajemen media penyiaran radio televisi Timor Leste sebagai lembaga penyiaran publik, Faktor-faktor apa sajakah yang menghambat manajemen media penyiaran radio televisi Timor Leste sebagai lembaga penyiaran publik? Dan tujuam yang ingin dicapai, antara lain : Untuk mengetahui manajemen media penyiaran radio televisi Timor Leste sebagai lembaga penyiaran publik.Untuk mengetahui faktor-faktor yang menghambat manajemen media penyiaran radio televisi Timor Leste sebagai lembaga penyiaran publik. Pendekatan yang digunakan dalam penelitian ini adalah pendekatan kualitatif berupa kata-kata tulis atau lisan tentang orang-orang atau prilaku yang dapat di amati. hasil penelitian Radio dan Televisi Timor Leste kerjasama Dapat dilihat dari hasil pembahasan yang telah dipaparkan sebelumnya dan setelah dilakukan analisis, maka kesimpulan yang dapat diberikan penelititentang “Manajemen Media Penyiaran Radio dan Televisi Timor Leste sebagai Lembaga Penyiaran Publik” adalah sebagai berikut :Dilihat dari perencanaan radio TV Timor Leste telah menetapkan visi dan misi walaupun belum sepenuhnya dapat di realisasi
Counting on chemistry: laboratory evaluation of seed-material-dependent detection efficiencies of ultrafine condensation particle counters
Authors: Wlasits Peter Josef , Stolzenburg Dominik , Tauber Christian , Brilke Sophia , Schmitt Sebastian Harald , Winkler Paul Martin , Wimmer Daniela 
Published: July 2020

Abstract. Condensation particle counters (CPCs) are crucial instruments for detecting sub-10 nm aerosol particles. Understanding the detection performance of a CPC requires thorough characterization under well-controlled laboratory conditions. Besides the size of the seed particles, chemical interactions between the working fluid and the seed particles also influence the activation efficiencies. However, common seed particle materials used for CPC characterizations are not chosen with respect to chemical interactions with vapor molecules of the working fluid by default. Here, we present experiments on the influence of the seed particle material on the detection efficiencies and the 50 % cutoff diameters of commonly used CPCs for the detection of sub-10 nm particles. A remarkable set consisting of six different and commercially available particle detectors, including the newly developed TSI V-WCPC 3789 and a tuned TSI 3776, was tested. The corresponding working fluids of the instruments are n-butanol, diethylene glycol and water. Among other materials we were able to measure detection efficiencies with nanometer-sized organic seed particles reproducibly generated by the oxidation of β-caryophyllene vapor in a flow tube. Theoretical simulations of supersaturation profiles in the condensers were successfully related to measured detection efficiencies. Our results demonstrate the importance of chemical similarities between seed particles and the working fluids used when CPCs are characterized. We anticipate our study to contribute to a deeper understanding of chemical interactions during heterogeneous nucleation processes.
Magnetic-local-time dependency of radiation belt electron precipitation: impact on ozone in the polar middle atmosphere
Authors: Verronen Pekka T. , Marsh Daniel R. , Szeląg Monika E. , Kalakoski Niilo 
Published: July 2020

Abstract. The radiation belts are regions in the near-Earth space where solar wind electrons are captured by the Earth's magnetic field. A portion of these electrons is continuously lost into the atmosphere where they cause ionization and chemical changes. Driven by the solar activity, the electron forcing leads to ozone variability in the polar stratosphere and mesosphere. Understanding the possible dynamical connections to regional climate is an ongoing research activity which supports the assessment of greenhouse-gas-driven climate change by a better definition of the solar-driven variability. In the context of the Coupled Model Intercomparison Project Phase 6 (CMIP6), energetic electron and proton precipitation is included in the solar-forcing recommendation for the first time. For the radiation belt electrons, the CMIP6 forcing is from a daily zonal-mean proxy model. This zonal-mean model ignores the well-known dependency of precipitation on magnetic local time (MLT), i.e. its diurnal variability. Here we use the Whole Atmosphere Community Climate Model with its lower-ionospheric-chemistry extension (WACCM-D) to study effects of the MLT dependency of electron forcing on the polar-ozone response. We analyse simulations applying MLT-dependent and MLT-independent forcings and contrast the resulting ozone responses in monthly-mean data as well as in monthly means at individual local times. We consider two cases: (1) the year 2003 and (2) an extreme, continuous forcing. Our results indicate that the ozone responses to the MLT-dependent and the MLT-independent forcings are very similar, and the differences found are small compared to those caused by the overall uncertainties related to the representation of electron forcing in climate simulations. We conclude that the use of daily zonal-mean electron forcing will provide an accurate ozone response in long-term climate simulations.
Impact of West Antarctic ice shelf melting on Southern Ocean hydrography
Authors: Nakayama Yoshihiro , Timmermann Ralph , H. Hellmer Hartmut 
Published: July 2020

Abstract. Previous studies show accelerations of West Antarctic glaciers, implying that basal melt rates of these glaciers were previously small and increased in the middle of the 20th century. This enhanced melting is a likely source of the observed Ross Sea (RS) freshening, but its long-term impact on the Southern Ocean hydrography has not been well investigated. Here, we conduct coupled sea ice–ice shelf–ocean simulations with different levels of ice shelf melting from West Antarctic glaciers. Freshening of RS shelf and bottom water is simulated with enhanced West Antarctic ice shelf melting, while no significant changes in shelf water properties are simulated when West Antarctic ice shelf melting is small. We further show that the freshening caused by glacial meltwater from ice shelves in the Amundsen and Bellingshausen seas can propagate further downstream along the East Antarctic coast into the Weddell Sea. The freshening signal propagates onto the RS continental shelf within a year of model simulation, while it takes roughly 5–10 and 10–15 years to propagate into the region off Cape Darnley and into the Weddell Sea, respectively. This advection of freshening modulates the shelf water properties and possibly impacts the production of Antarctic Bottom Water if the enhanced melting of West Antarctic ice shelves continues for a longer period.
Current Approaches and Trends in Graduate Public Health Informatics Education in the United States: Four Case Studies from the Field
Authors: Schwartz Diane G. , McGrath Scott , Monsen Karen , Dixon Brian 
Published: July 2020

Background: Public Health Informatics (PHI) has taken on new importance in recent years as health and well-being face a number of challenges, including environmental disasters, emerging infectious diseases, such as Zika, Ebola and SARS-CoV-2, the growing impact of the Influenza virus, the opioid epidemic, and social determinants of health. Understanding the relationship between climate change and the health of populations adds further complexity to global health issues.
Objectives: To describe four examples of curricula that exist in U.S. based graduate-level public and population health informatics training programs.
Methods: Biomedical informatics educators are challenged to provide learners with relevant, interesting, and meaningful educational experiences in working with and learning from the many data sources that comprise the domain of PHI. Programs at four institutions were reviewed to examine common teaching practices that stimulate learners to explore the field of public health informatics.
Results: Four case studies represent a range of pedagogical approaches to meeting the requirements of three established accreditation/certification agencies relevant to PHI education. Despite their differences, each program achieved the established learning objectives along with a substantive record of student learning achievements.
Conclusion: The overarching goal of empowering learners to serve an active and dynamic role in enhancing preventive measures, informing policy, improving personal health behaviors, and clarifying issues such as quality, cost of care, and the social determinants of health, are essential components of PHI education and training, and must receive additional consideration now and in the future by educators, policy makers, administrators, and government officials.
La práctica judicial en las causas matrimoniales de la sociedad española del siglo XVIII
Authors: Ortega López Margarita 
Published: July 2020

El trabajo muestra los comportamientos y estrategias que siguieron los tribunales españoles del siglo XVIII en las causas matrimoniales. Se percibe en ellos como buscaban perpetuar a toda costa la convivencia entre los esposos bajo el principio básico de autoridad masculina y obediencia femenina, existiendo una evidente complicidad entre la magistratura y el cabeza de familia afectado.The study shows the behaviours and strategys, that follow the spanish courts during the XVIII century in the matrimonial lawsuit. In them perceive it, haw they search for perpetúate insistencely the coexistence between the husbands, under the basic principie of the masculine authority and femenine obedience; existing a obvious accomplicity between the magistrate and the family's leader affected.
A Study on the Sums of Squares of Generalized Fibonacci Numbers: Closed Forms of the Sum Formulas Σn k=0 kxkW2 k and Σn k=1 kxkW2- k
Authors: Soykan Y¨uksel 
Published: July 2020

In this paper, closed forms of the sum formulas Σn k=0 kxkW2 k and Σn k=1 kxkW2 -k for the squares of generalized Fibonacci numbers are presented. As special cases, we give sum formulas of Fibonacci, Lucas, Pell, Pell-Lucas, Jacobsthal, Jacobsthal-Lucas numbers. We present the proofs to indicate how these formulas, in general, were discovered. Of course, all the listed formulas may be proved by induction, but that method of proof gives no clue about their discovery. Our work generalize second order recurrence relations.
Some Analytical Considerations Regarding the Traveling Salesman Problem Solved with Wolfram Mathematica Applications
Authors: Cioruța Bogdan-Vasile , Lauran Alexandru , Coman Mirela 
Published: July 2020

The paper presents an introduction to the Ant Colony Optimisation (ACO) algorithm and methods for solving the Travelling Salesman Problem (TSP). Documenting, understanding and knowledge of concepts regarding the emergent behavior and intelligence swarms optimization, easily led on solving the Travelling Salesman Problem using a computational program, such as Mathematics Wolfram via Creative Demostration Projects (*.cdf) module.
The proposed application runs for a different number of ants, a different number of ants, a different number of leaders (elite ants), and a different pheromone evaporation index. As a result it can be stated that the execution time of the algorithm to solve the TSP is direct and strictly proportional to the number of ants, cities and elite ants considered, the increase of the execution time increasing significantly with the increase of the variables.
Aging, Media, and Communication
Authors: Bühring Lisa‐Nike 
Published: July 2020

The marked demographic change in industrialized countries has increased cross‐disciplinary interest in exploring understandings of aging on a social as well as individual level. Qualitative research in aging studies predominantly views aging as socially constructed. It therefore aims at gaining a better understanding of grand narratives of aging disseminated by powerful sociocultural agents in the media, the legal and political system, medical sciences, and academic institutions, of individual identity constructions in higher age and of how older people incorporate narratives of aging into their life‐course narratives.
Neoliberal grand narratives of aging unfold within the binary of progress versus decline discourses. While representations linking aging to decline are characterized by a loss of control over mental and physical capabilities and resultant dependency on family, friends, or the state, the concept of successful aging is based on managing aging by staying autonomous, active, and youthful for as long as possible. Although the successful aging paradigm seems to support a positive view of aging, it not only reproduces gender hierarchies and heteronormativity but it also puts enormous pressure on those trying to meet the standards of successful aging and contributes to the marginalization of anyone who does not want or is not able to comply. An alternative to current sociocultural views of aging might be to approach aging outside of chronological homogenization and standardization and within the context of individual life‐course narratives in which each person constructs meaning, consistency and, ultimately, identity in one's life.