bluuebunny/crossref_metadata_2025 huggingface dataset:
Studi Pengaruh Noise Level Vessel Terhadap Kontrol Kualitas Data Multibeam Echosounder (Studi Kasus Sounding Vessel KRI Spica – 934 di Perairan Kolam Dermaga Pondok Dayung Baru Jakarta Utara)
Authors: P R. Yanuar H. , Manik Henry M. , Wahyudi Ari
Published: July 2020

Survei Hidrografi adalah ilmu pengukuran dan penggambaran fitur - fitur yang mempengaruhi navigasi maritim, konstruksi kelautan, pengerukan, eksplorasi/pengeboran minyak lepas pantai dan kegiatan - kegiatan lain yang terkait. Penggunaan Multibeam Echosounder (MBES) membutuhkan metoda dan pola pemeruman yang tepat. sehingga kontrol kualitas data yang sesuai dengan standar S-44 IHO (2008) maupun SNI 7988-2014. Pemeruman dilaksanakan sesuai dengan lajur perum yang telah ditentukan dengan menggunakan kecepatan yang sudah ditentukan sesuai dengan perencanaan survey. Penggunaan kecepatan kapal dan generator mempengaruhi noise level vessel yang dihasilkan memiliki pengaruh terhadap pancaran sinyal akustik dari MBES. Hal tersebut terdapat dalam perumusan persamaan Sonar. Penelitian ini dilaksanakan untuk mengetahui pelaksanaan pengukuran noise level vessel yang didapatkan setiap perubahan beban mesin dan generator serta penggunaan MBES pada Sounding Vessel KRI Spica – 934, serta mengetahui sumber noise paling dominan, dan kontrol kualitas data batimetri dengan adanya kondisi noise level vessel yang berbeda. Pengambilan Data dilakukan pada tanggal 20 - 25 April 2018 di Perairan Dermaga Pondok Dayung Baru, Jakarta Utara. Penempatan hidrofon pada 5 titik pada kapal untuk mengetahui noise yang dominan pada kapal tersebut. Pengolahan data batimetri menggunakan software CARIS HIPS and SIPS 9.0 dan untuk pengolahan data noise menggunakan Matlab 2015a. Pengukuran noise dilaksanakan dengan menggunakan standar ANSI/ASA. Noise yang tertinggi didapatkan pada posisi dekat dengan propeler. Hasil pengolahan data memperlihatkan bahwa pada penggunaan kecepatan 4 knot didapatkan kualitas data batimetri tertinggi 99,88% dengan noise level 24,88 dB. Pada kecepatan 6 knot didapat noise tertinggi dengan noise level 26,56 dB.
Introducción
Authors: Ortiz Marín Ángel Manuel
Published: July 2020

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Políticas culturales sobre el cine mexicano: La cinemateca de Luis Buñuel y sus públicos
Authors: Domínguez García Laura
Published: July 2020

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Design Optimization of Composite Submarine Pressure Hull
Authors: M Ranjith , Rajadurai Dr. J. Selwin
Published: July 2020

The design of composite submarine pressure hull is optimize the Stress and Failure index into consideration using ANSYS Software and Tsai-Wu Failure theory. The FEA value is compared with theoretical results. The composite of EPOXY resin and E-GLASS fiber is used to optimize the failure criteria by using ANSYS software. The failure index o the isentropic and orthotropic material should be less than 1 as per the Tsai-Wu criteria. The pressure hull is used to many structural applications such that Pressure Vessels, Aircrafts and Nuclear Submarines. The Failure index value is vary from applied load.
Adaptation of the Local Ghanaian Caldron (“Dadesen”) for Drums Shells
Authors: Agyeman Kafui Kwesi , Quaye Harold Awuley , Clement Frederick Ampah , Sarpong Theophilus Agyekum
Published: July 2020

The introduction and high patronage of foreign utensils has reduced the demand for the “dadesen” (a traditional aluminium caldron in Ghana). This is seen by this research as threat to the producers. For this reason, the researchers realise the need to diversify the use of the “dadesen” to assure the livelihood of the local artisans who make them and also to save the craft for posterity. This led to a physical analysed of the form which suggested drum shells. This led to a factor analyses of how a drum /shell can be produced from the “dadesen” and subsequently a drum. These were done in consultation with drum carvers and experts from the localities through interviews and observation. Consequently, the researchers arrived at defined means of executing “dadesen” drum shells and subsequently employed the Ghanaian traditional talking drum making process to stretch the animal skin on the metal shell. This led to the production of a pair of talking drums. These drums were thoroughly tried and the sounds were good. It is therefore concluded that the “dadesen” is a potential form for making of drums. This is highly recommended for another genre of drums.
PREDICTING BEHAVIOURAL RESISTANCE TO BIM IMPLEMENTATION IN CONSTRUCTION PROJECTS: AN EMPIRICAL STUDY INTEGRATING TECHNOLOGY ACCEPTANCE MODEL AND EQUITY THEORY
Authors: Wang Guangbin , Wang Pengfei , Cao Dongping , Luo Xiaochun
Published: July 2020

Despite its great potential to streamline design and construction processes, the implementation of building
information modelling (BIM) in many projects has failed to achieve expected benefits due to user resistance. Grounded in the technology
acceptance model and equity theory, this study proposes a model of factors predicting resistance behaviours to BIM implementation during
the post-adoption stage in construction projects. The model is tested with partial least squares modelling on survey data collected from
design engineers in BIM-based construction projects in China. The empirical results provide evidence that after controlling for related
individual, organizational and project characteristics, efficiency and equity perceptions play prominent but independent roles in determining
behavioural resistance to BIM implementation, and that these perceptions are differently associated with contextual factors at individual,
team and project levels. Apart from the independent contextual factors conceptualized in the model, control factors such as individual age
and organization nature are also found to be significantly associated with resistance behaviours. As an exploratory effort to examine
resistance behaviours to BIM implementation in construction projects, this study contributes to deepened understandings of the complexity
of innovation resistance behaviours in the context of construction projects and offer suggestions for how to manage such behaviours.
KMT-2019-BLG-1339L: An M Dwarf with a Giant Planet or a Companion near the Planet/Brown Dwarf Boundary
Authors: Han Cheongho , Kim Doeon , Udalski Andrzej , Gould Andrew ,   (Leading authors), Albrow Michael D. , Chung Sun-Ju , Hwang Kyu-Ha , Jung Youn Kil , Lee Chung-Uk , Ryu Yoon-Hyun , Shin In-Gu , Shvartzvald Yossi , Yee Jennifer C. , Zang Weicheng , Cha Sang-Mok , Kim Dong-Jin , Kim Hyoun-Woo , Kim Seung-Lee , Lee Dong-Joo , Lee Yongseok , Park Byeong-Gon , Pogge Richard W. ,   (The KMTNet Collaboration), Mróz Przemek , Szymański Michał K. , Skowron Jan , Poleski Radosław , Soszyński Igor , Pietrukowicz Paweł , Kozłowski Szymon , Ulaczyk Krzysztof , Rybicki Krzysztof A. , Iwanek Patryk , Wrona Marcin , Gromadzki Mariusz ,   (The OGLE Collaboration)
Published: July 2020

We analyze KMT-2019-BLG-1339, a microlensing event with an obvious but incompletely resolved brief anomaly feature around the peak of the light curve. Although the origin of the anomaly is identified to be a companion to the lens with a low mass ratio q, the interpretation is subject to two different degeneracy types. The first type is the ambiguity in ρ, representing the angular source radius scaled to the angular radius of the Einstein ring, θ
E, and the other is the s ↔ s
−1 degeneracy. The former type, “finite-source degeneracy,” causes ambiguities in both s and q, while the latter induces an ambiguity only in s. Here, s denotes the separation (in units of θ
E) in projection between the lens components. We estimate that the lens components have masses

and

according to the two solutions subject to the finite-source degeneracy, indicating that the lens comprises an M dwarf and a companion with a mass around the planet/brown dwarf boundary or a Jovian-mass planet. It is possible to lift the finite-source degeneracy by conducting future observations utilizing a high-resolution instrument because the relative lens–source proper motion predicted by the solutions is widely different.
Spatially Quasi-periodic Finger-like Auroras during Substorms
Authors: Wang Wenrui , Yang Jian , Wang Yong-Fu , Shi Quanqi , Cui Jun
Published: July 2020

North–south-aligned discrete auroras are common phenomena during substorms. A quasi-periodic form of such auroras distributed azimuthally in the nightside resembles a finger-like morphology. They were noticed in sawtooth-time substorms, but have not yet been paid much attention during other geomagnetic times. In this study, we investigate the longitudinal periodicity of those auroras for different types of substorms using IMAGE data from 2001 to 2003. Using an automated detection algorithm, we identified multiple north–south-aligned thin auroral structures in auroral images and found that their average center and length in latitude, and longitudinal wavelength (∼25°) are essentially the same. However, the occurrent rates for finger-like auroras are substantially different, 83%, 64%, and 18% for sawtooth-time substorms, storm-time substorms and isolated substorms, respectively. Therefore, statistical results indicate that finger-like auroras occur in favor of geomagnetically more active times. Combining our data analysis and previous simulations, we suggest that interchange instability is a possible mechanism of spatially quasi-periodic finger-like auroras when a substorm injection happens in a very wide local time. It is particularly important to point out that the sawtooth events not only have a temporal periodicity as defined in particle injections, but also have a spatial periodicity as observed in auroral morphology for the majority of them.
HST/COS Observations of Quasar Outflows in the 500–1050 Å Rest Frame. VII. Distances and Energetics for 11 Outflows in Five Quasars*
Authors: Miller Timothy R. , Arav Nahum , Xu Xinfeng , Kriss Gerard A. , Plesha Rachel J.
Published: July 2020

From Hubble Space Telescope/Cosmic Origins Spectrograph spectra of five quasars, 16 outflows are detected. For 11 outflows, we are able to constrain their distances to the central source (R) and their energetics. In instances of multiple electron number density determinations (used in the calculation of R) for the same outflow, the values are consistent within errors. For the 11 outflows, eight have measurements for R (between 10 and 1000 pc), one has a lower limit, another has an upper limit, and the last has a range in R. There are two outflows that have enough kinetic luminosity to be major contributors to active galactic nucleus feedback. The outflowing mass is found primarily in a very high-ionization phase, which is probed using troughs from, e.g., Ne viii, Na ix, Mg x, and Si xii. Such ions connect the physical conditions of these ultraviolet outflows to the X-ray warm absorber outflows seen in nearby Seyfert galaxies. The ion Cl vii and several new transitions from Ne v have been detected for the first time.
Acute Esophageal Damage in Patients with Inoperable Non-small Cell Lung Cancer Treated with Concurrent and Sequential Chemoradiotherapy
Authors: Crvenkova Simonida , Popova M.
Published: July 2020

BACKGROUND: Acute esophageal damage may be a dose-limited factor for application the full planning radiotherapy (RT) dose in patients with inoperable non-small cell lung cancer (NSCLC). A combination of chemotherapy and RT may increase esophageal toxicity, but three-dimensional (3D) conformal RT offers better sparing of the organs at risk.
AIM: The purpose of this study was to show the incidence and degree of acute esophageal damage in lung cancer patients treated with sequential and concurrent chemoradiotherapy.
MATERIALS AND METHODS: The total number was 73 patients, of whom 26 (34.7%) had previously received sequential chemotherapy with a four-cycle followed by RT. In the second concurrent group, 47 (65.3%) patients were received concomitant chemotherapy and RT.
RESULTS: Of the 73 patients included in the study, 43 (57.3%) did not present any grade of esophagitis during the treatment. In the sequential group, 73.1% presented no esophagitis and in the concurrent group, 49%, respectively. Although there were differences between the two groups, none were statistically significant.
CONCLUSIONS: The reason for the good tolerability of the combination of chemotherapy and RT for inoperable NSCLC patients was using 3D conformal RT. Further improvements may be obtained with more sophisticated RT or radioprotective drugs.
Online social media tells a story of Anaselina, Paraselina, and Selivinga (Orthoptera, Tetrigidae), rare Australian pygmy grasshoppers
Authors: Skejo Josip , Connors Matthew , Hendriksen Michael , Lambert Nick , Chong Griffin , McMaster Ian , Monaghan Nick , Rentz David , Richter Reiner , Rose Kathy , Franjević Damjan
Published: July 2020

Knowledge on the pygmy grasshoppers of Australia is, despite the numerous endemics being described from this unique continent, still scarce. Of interest is the Vingselina genus group, including genera Anaselina Storozhenko, 2019, Paraselina Storozhenko, 2019, Selivinga Storozhenko, 2019 and Vingselina Sjöstedt, 1921. The systematic position of this group, currently assigned to Batrachideinae (Bufonidini), is probably not correct. In this study new records are presented of Anaselina minor (Sjöstedt, 1921), Paraselina brunneri (Bolívar, 1887), P. trituberculata (Sjöstedt, 1932), and Selivinga tribulata Storozhenko, 2019, all except A. minor the first records of the species since their original descriptions. The first photographs of living specimens of A. minor, P. brunneri, P. trituberculata and S. tribulata are provided and their habitats described. All the records were compiled by citizen scientists who use online social media, such as iNaturalist. Lastly, P. multifora (Rehn, 1952) syn. nov. represents a junior synonym of P. brunneri.
Le pilotage des grandes crises : les leçons de Katrina
Authors: Lagadec Patrick
Published: July 2020

Du fait de l’interconnexion des économies et des sociétés, de la dépendance vis-à-vis de réseaux vitaux, de la mondialisation des médias, l’accident grave n’est plus une simple brèche dans des systèmes relativement stables et peut rapidement se muer en chaos. Il faut donc réexaminer nos logiques d’actions, nos organisations et nos outils. À partir de l’expérience du cyclone Katrina de 2005, Patrick Lagadec milite pour une méthode testée dans le cadre du dispositif de gestion des crises d’EDF, la Force de réflexion rapide.
Un rejet d’industrie lithique en fosse daté du Bronze moyen à Mazinghem (Pas-de-Calais)
Authors: Gourio Léa , Simon Frédéric
Published: July 2020

En 2018, la réalisation d’une opération de diagnostic d’environ 4 ha sur la commune de mazinghem (Pas-de-Calais) a permis la mise au jour de trois petites fosses datées de l’Âge du Bronze moyen/final. Vraisemblablement témoins de rejets d’une occupation domestique toute proche, ces vestiges s’avèrent surtout intéressants par le mobilier issu de leurs comblements. Le corpus lithique particulièrement homogène fut l’occasion d’étudier la chaîne opératoire quasi complète d’un débitage. À l’instar des quelques corpus régionaux de référence pour cette période chronologique, la série de mazinghem démontre une activité de taille opportuniste par percussion directe à la pierre dure sur de petits blocs de silex locaux ramassés en position secondaire et souvent de mauvaise qualité. L’outillage composé de grattoirs, de denticulés, d’éclats retouchés ou utilisés bruts et d’un aiguisoir de type meulet en grès semble témoigner de besoins peu exigeants en terme de typologie fonctionnelle. Il démontre toutefois la continuité à l’échelle domestique d’un usage de la pierre taillée parallèlement au lent développement d’outils en alliage cuivreux.
Archéoscopie en bleu d’un camp de la Grande Guerre
Authors: Lemaire Frédéric , Gill Douglas , Ramet Joël
Published: July 2020

Lorsque la guerre éclate en août 1914, Étaples est un petit port de pêche de 5 000 âmes. Trois ans plus tard, le lieu est devenu un gigantesque camp militaire britannique. Que reste-il de ce camp centenaire si peu étudié ? Cette étude porte sur la dimension archéologique d u site. Elle est fondée principalement sur l’examen et la numérisation du plan Falcon de juillet 1917, dont il subsiste un tirage diazo, un « bleu », conservé au musée Quentovic d’Étaples. Le diagnostic est complété par des données issues de fouilles préventives, de prospections de surface, ou d’explorations souterraines. Ces témoins matériels constituent la base d’un corpus archéologique propre à documenter les différents aspects et temporalités du camp. La tonalité bleue de cet examen archéologique est également une référence aux travailleurs chinois – la couleur de leur uniforme. De rares artefacts de ces « coolies » sont présentés. Ils témoignent du caractère cosmopolite du camp.
L’Afrique est un contexte pertinent pour la recherche en sciences de gestion : une contribution à partir des travaux en finance
Authors: Nekka Hadj , Séverin Éric
Published: July 2020

Dans ce travail, nous avons mobilisé les travaux des spécialistes de la finance, pour tenter décrire ce qui est le contexte. Bien entendu, ces travaux font une lecture du contexte non pas tel qu’il est mais tel qu’il est voulu ou souhaité. Dans le champ de la finance domine une conception économique du contexte avec une grande confiance dans le marché comme institution. Dans cette institution, les individus sont considérés comme rationnels capables de maximiser leur fonction d’utilité comme disent les économistes. Dans cet article, nous montrons la richesse d’une analyse distinguant le contexte sociétal et organisationnel et ainsi leurs possibles articulations. Nous avons montré le potentiel d’une telle analyse et nous comptons le poursuivre à travers des investigations empiriques.
Thermal properties of cement mortar with different mix proportions
Authors: Shafigh P. , Asadi I. , Akhiani A. R. , Mahyuddin N. B. , Hashemi M.
Published: July 2020

The energy required for the heating and cooling of buildings is strongly dependant on the thermal properties of the construction material. Cement mortar is a common construction material that is widely used in buildings. The main aim of this study is to assess the thermal properties of cement mortar in terms of its ther­mal conductivity, heat capacity and thermal diffusivity in a wide range of grades (cement: sand ratio between 1:2 and 1:8). As there is insufficient information to predict the thermal conductivity and diffusivity of a cement mortar from its physical and mechanical properties, the relationships between thermal conductivity and diffu­sivity and density, compressive strength, water absorption and porosity are also discussed. Our results indicate that, for a cement mortar with a 28-day compressive strength in the range of 6–60 MPa, thermal conductivity, specific heat and thermal diffusivity are in the range of 1.5–2.7 W/(m.K), 0.87–1.04 kJ/kg.K and 0.89–1.26 (x10-6 m2/s), respectively. The scanning electron microscope (SEM) images showed that pore size varied from 18 μm to 946 μm for samples with different cement-to-sand ratios. The porosity of cement mortar has a signifi­cant effect on its thermal and physical properties. For this reason, thermal conductivity and thermal diffusivity was greater in cement mortar samples with a higher density and compressive strength.
Conductive concrete made from recycled carbon fibres for self-heating and de-icing applications in urban furniture
Authors: Faneca G. , Ikumi T. , Torrents J. M. , Aguado A. , Segura I.
Published: July 2020

This paper presents a broad experimental study performed at laboratory and industrial facilities to develop conductive concrete for self-heating and de-icing applications in urban furniture. Self-heating capacity is achieved by the application of electric current through a highly dense matrix containing recycled carbon fibers and graphite flakes. Prisms and slabs were fabricated with two different conductive concretes and electrode con­figurations to characterize the electrical properties and heating performance. Finally, 3 benches with different electrode disposals were fabricated to assess the heating capacity in real-scale applications. The results presented indicate promising results about the use of recycled carbon fibers for electrothermal concrete applications and identify the electrode configuration that allows the most efficient heat transfer and reduction of temperature gradients within the heated element. Real-scale tests show that the current technology developed is potentially applicable at de-icing applications in climates where temperatures remain within the range of -3 or -5 ºC.
Sunflower biometrics and chemical salinity attributes of soil irrigated with waters of different qualities
Authors: Silva Paulo Vitor Santa Rosa , Nascimento Patricia Dos Santos
Published: July 2020

Poor quality water, such as sewage, has become an alternative to reduce the consumption of good quality water by irrigation, especially in arid and semi-arid regions; however, water rich in salts can be harmful to agricultural systems. This research evaluated the impacts of salinity of waters of different qualities on the development of the sunflower culture and on the soil. The research was developed in the area of the Environmental Studies Team (EEA/UEFS), and the experimental design used was completely randomized, consisting of four treatments: rain water (0.20 dS m-1), well water (1.50 dS m-1), cesspool effluent (3.50 dS m-1) and brackish water (5.00 dS m-1), with the irrigation manually done and the blade calculated based on daily evapotranspiration. Irrigation with  effluent promoted a better development of the sunflower crop, and the increase in the salinity of the irrigation water in the other treatments promoted a decrease in the total fresh and dry phytomasses, plant height, stem diameter, number of leaves, leaf area, internal and external diameters of the capitula and in the consumption and efficiency of water use. The use of rainwater, well water and cesspool effluent proved to be suitable for irrigation of the sunflower crop; however, the latter sodified the soil, which would already be recommended for the application of treatments for soil recovery.
Tannaka duality for enhanced triangulated categories I: reconstruction
Authors: Pridham Jonathan P.
Published: July 2020

We develop Tannaka duality theory for dg categories. To any dg functor from a dg category

\mathcal A

to finite-dimensional complexes, we associate a dg coalgebra

C

via a Hochschild homology construction. When the dg functor is faithful, this gives a quasi-equivalence between the derived dg categories of

\mathcal A

-modules and of

C

-comodules. When

\mathcal A

is Morita fibrant (i.e. an idempotent-complete pre-triangulated category), it is thus quasi-equivalent to the derived dg category of compact

C

-comodules. We give several applications for motivic Galois groups.
Boundary Applicability of the Ghana’s Oil Block Fiscal Regimes
Authors: Ocran D. , Broni-Bediako E. , Ofori-Sarpong G.
Published: July 2020

AbstractAttractiveness of fiscal regime has become more important in oil and gas investment decision than the rather geological prospectivity of the province. The terms and conditions contained in the fiscal system influence the investor’s evaluation of project. As Ghana determines to benefit greatly from the exploitation of the oil and gas resources, a robust fiscal system attractive in all economical and technical conditions needs to be designed. Ghana has recently become one of the frontiers in the oil and gas industry following its commercial discoveries of hydrocarbons in Deepwater Tano-Cape Three Point, the Jubilee field. Ghana’s oil industry is very young and some of the basins are under exploration surveillances waiting for commercial discoveries. Ghana’s Jubilee field uses various terms and conditions in her fiscal arrangement to govern the upstream operations. For continuous realisation of economic benefits to the State as well as the contractor, it is important the applicability of Ghana’s fiscal regime at varying boundary conditions of oil price and field reserves are evaluated. Discounted cash flow economic model which considers the major uncertainties was developed to evaluate the economic implications of the Jubilee field fiscal regime. Different price scenarios and varying field sizes were taken through rigorous sensitivity analysis. It was determined that for all field sizes considered at oil prices above $ 40/bbl, contractor’s NPVs are positive. The project take statistics are averagely around 64% for Government and 36% for contractor under the various scenarios except for oil prices less than $40/bbl where the State’s take statistic is above 80% and contractor’s take below 20%. The State receives Additional Oil Entitlement(AOE) only when the oil price is above $40/bbl and the AOE increases steadily with the oil price for all the various field sizes. In general, the Jubilee field fiscal regime is fairly attractive and flexible and ensures stable shares of economic rents between the State and the contractor as the profitability of the field increases. Keywords: Reserves, Fiscal Regime, Cash Flow, Take Statistics, Net Present Value
The Use of Bauxite as an Arsenic Filter
Authors: Ndur S. A. , Osei H. , Abbey C. E. , Joe-Asare T.
Published: July 2020

AbstractArsenic (As) has the potential to negatively affect soils and groundwater quality, and cause several public health challenges. It is usually concentrated and released during metal mining of ores that contains arsenic-bearing minerals. Remediation strategies are in place to avoid pollution. In this study, bauxite from Awaso, Ghana, was characterised, and its ability to sequester As was tested under varying conditions of temperature, Eh and pH. The study showed that the best particle size in the range utilised was 80% passing 2 mm as it allowed easy percolation, and As removal was about 95%. The reaction is a favourable pseudo-second order reaction that is spontaneous and thermodynamically stable and compares well with the Langmuir Sorption Isotherm. About 80% sorption was achieved within 20 minutes of contact with low desorption rate of less than 1.8%. The study thus concludes that bauxite is a good filter for arsenic. Keywords: Arsenic, Bauxite, Filter, Sorption, Isotherm
Design of an Integrated Anti-Hardening System for Carbon-In-Leach Tanks
Authors: Ofosu R. A. , Normanyo E. , Essilfie-Nyame B.
Published: July 2020

Slurry density monitoring is of paramount importance in the industrial world. Most industries, especially cement and mineral processing industries, employ this method to obtain good quality products. However, most Carbon-In-Leach (CIL) tanks of gold processing industries do not use slurry density monitoring systems. As a result, many a time, agitation difficulties occur when the slurry begins to harden. This paper, therefore, seeks to design an integrated anti-hardening system for CIL tanks, with the aid of a microcontroller, to monitor the density of the slurry in order to prevent it from hardening. Slurry density measurement was achieved with the help of a strain gauge pressure sensor and a couple of level sensors. Atmega 328p  microcontroller board was programmed to continuously compute the density of the slurry from values of pressure and level of slurry in the tank indicated by the pressure and level sensors, respectively. The microcontroller responds to slurry hardening by activating a light emitting diode and triggering the piezo buzzer when a set point is reached. The designed circuit was successfully simulated using Proteus 8.2 design suite software to ascertain its functionality. Based on the results obtained, the light emitting diode and piezo buzzer activated when the set point was reached. It was concluded that the anti-hardening system is effective for constantly monitoring the density of the slurry to prevent it from hardening. It was also recommended that the mining industries could employ the designed system to monitor the density in order to prevent hardening of slurry in CIL tanks. Keywords: Carbon-In-Leach Tanks, Slurry Densisty, Strain Guage Pressure Sensor, Microcontroller
Efficacy of Geophysical Techniques for Groundwater Exploration in the Volta Basin, Northern Region of Ghana
Authors: Ewusi A. , Seidu J.
Published: July 2020

Abstract

Groundwater, traditionally extracted from hand-dug wells and boreholes is the main drinking water source in the Northern Region of Ghana. Many boreholes have been constructed in the region to increase accessibility to potable water mainly as part of rural water supply projects where borehole siting has to be relatively cheaper.  These projects have resulted in low success rates of borehole drilling because of the application of inefficient and simple geophysical techniques supposed to be cheaper. Field surveys were conducted with the Electrical Resistivity Imaging (ERI) technique, Electrokinetic System (EKS) sounding technique and Radon (222Rn) technique with the objectives of determining the best geophysical methods for borehole siting and its efficiency in the Volta Basin (VB) in the Northern Region of Ghana. The surveys were conducted at stations of existing dry and positive boreholes. Results show that the three geophysical techniques are efficient to identify groundwater accumulation zones. The ERI, EKS and 222Rn are efficient to identify discontinuities, calculate hydraulic conductivity of discontinuities and identify areas of water circulation respectively. It is recommended that the ERI be used to obtain discontinuities and weak zones for drilling on rural water supply projects in the VB. The EKS and 222Rn should be conducted to evaluate these features when high yield boreholes are required.

 

Keywords: Geophysical Techniques, Volta Basin, Borehole Drilling, Success Rates
Do Crude Oil Price Changes Affect Economic Welfare? Empirical Evidence from Ghana
Authors: Kamasa K.
Published: July 2020

Abstract

This paper sought to explore the impact of crude oil price changes on economic welfare in Ghana. The paper employed the Autoregressive distributed lag (ARDL) estimation technique on an annual time series data spanning 1983 – 2017. The findings revealed that crude oil price changes have a negative and significant impact on economic welfare in the short and long run, albeit marginal. In terms of covariates, the findings revealed that trade openness and gross fixed capital formation have positive and significant impact whilst interest rate have negative impact on economic welfare in both the short and long run. Foreign direct investment had a positive effect, albeit insignificant. The paper recommends among others, the hedging of prices with respect to imported crude oil so as to manage the risks associated with crude oil price changes on economic welfare.

 

Keywords: Economic Welfare; Crude Oil Prices Changes; Autoregressive Distributed Lag; Ghana
Improving Housing Conditions of Historically Marginalised People (HMPs) in Rwanda: Mapping Regional Performance for Directed Interventions
Authors: Hategekimana S , Twarabameny E , Nyandwi E , Habimana J.D , Musabyimana M.Y
Published: July 2020

Historically Marginalised People (HMPs), count between 0.2 and 0.4% of the Rwandan population. For many decades, they have been living in hatched houses that are not suitable for human habitation. For improving HMPs' living conditions, the Government of Rwanda committed to providing them with decent housing, access to basic infrastructure and services. For a good capture of the effectiveness of such initiatives, a survey on HMPs' housing conditions was conducted in 11 districts. Data were processed with SPSS thereafter mapped using QGIS. The study reveals that most of the HMPs villages live close to basic infrastructure and services. However, in six districts, more than 75% of HMPs households still live in derelict houses and more than 50% have no toilet and kitchen, this results in high exposure of their occupants to various diseases. On one hand, the Government of Rwanda and local government should sensitize the HMPs to build their houses themselves even though they may be assisted, and on the other introduce specific plans for their integration.

Keywords: Historical Marginalised People, Housing Comfort, Access to infrastructure, Deprivation Index.
As contribuições de um curso de Modelagem Matemática para a formação e atuação de professores que ensinam Matemática
Authors: Frango Edyenis Rodrigues , Kistemann Junior Marco Aurélio
Published: July 2020

Este artigo apresenta os resultados de uma pesquisa realizada no Mestrado Profissional em Educação Matemática da Universidade Federal de Juiz de Fora (UFJF) que investigou a formação de professores que ensinam Matemática com a temática da Modelagem Matemática. Esta pesquisa, realizada em três fases com professores — pesquisa piloto, pesquisa pós-piloto e desenvolvimento do produto educacional — buscou compreender a relação desses professores com a Modelagem, tanto na sua formação quanto na sua prática docente. A cada fase da pesquisa foi possível perceber os anseios dos professores que ensinam Matemática por meio de questionários aplicados e das observações e interações com os participantes durante a formação realizada. Esses apontamentos evidenciam a carência dos cursos de formação de professores em relação à Modelagem Matemática. Como principal resultado da pesquisa, apresenta-se um Produto Educacional voltado para a formação inicial e continuada de professores de Matemática.
Palavras-chave: Modelagem Matemática. Formação de Professores. Produto Educacional.
Aprovechamiento integral de residuos lignocelulósicos
Authors: Gallo-Corredor J. A. , Sarria-Villa R. A.
Published: July 2020

Las especies Pinus patula y Pinus oocarpa entre otros son unas de las coníferas más cultivadas en el departamento del Cauca, su follaje contiene cierta cantidad de aceites esenciales, los cuales son usados en la industria cosmética y farmacéutica principalmente. La corteza de estas especies maderables es rica en compuestos polifenólicos, empleados en la fabricación de colorantes, resinas y compuestos con actividad antioxidante. Muchas de estas especies forestales son ricas en resinas naturales a partir de las cuales se pueden obtener resinas con aplicaciones industriales y líquidos con características aromáticas. Igualmente, el aserrín que se genera en su procesamiento puede ser empleado para producir biocombustibles y material combustible.
Mejoramiento de escaneo de haz en plano H para la lente RADANT
Authors: Iturri-Hinojosa L. A. , Martynyuk A. E. , López-Bonilla J.
Published: July 2020

Se presenta el diseño de una lente RADANT con escaneo de haz electrónico para X-Band. Se utiliza una configuración diodo-alambre en el diseño para reducir la interacción electromagnética entre los elementos adyacentes en la dirección “x”, obteniendo mejores resultados en la exploración del haz en el plano H. La lente RADANT de 3 bits dirige el haz 14° en el plano H con un coeficiente de conversión de -2.75 dB. En el mismo plano, se logra una dirección del haz de 7° con un coeficiente de conversión de -2,7 dB. Y se obtiene la dirección de transmisión de 32° en el plano E con un coeficiente de conversión de -2,9 dB. Los resultados de escaneo de haz en el plano H con la configuración diodo-alambre en la lente RADANT de 3 bits son mejores a los obtenidos por [1].
El eucalipto como fuente de materia prima para la extracción de aceites esenciales
Authors: Sarria-Villa R. A. , Gallo-Corredor J. A.
Published: July 2020

En Colombia existen aproximadamente 141,000 hectáreas cultivadas con coníferas y mirtáceas, de las cuales unas 60; 000 están destinadas a la producción de pulpa para fabricación de papel. El aprovechamiento de estos cultivos se ha restringido al uso de la madera, dejando de lado los residuos de su actividad principal como la corteza y el follaje, materias primas, ricas en sustancias que han presentado un crecimiento sostenido en la demanda del mercado mundial por las aplicaciones que tienen en la industria alimentaria, cosmética y farmacéutica entre otras. El presente trabajo reporta los resultados correspondientes a la cuantificación del follaje de Eucaliptus grandis por hectárea y la determinación del rendimiento de obtención de aceite esencial de la especie en estudio.
Parámetros teórico-experimentales de una antena de cruz
Authors: Sosa-Pedroza J. , Lucas-Bravo A. , López-Bonilla J.
Published: July 2020

La antena de cruz es una estructura impresa de ganancia media y polarización circular, que consiste de un conductor o cinta sobre un plano de tierra que sigue el contorno de una cruz con cuatro o más ramas y un diámetro de alrededor de 1.5 longitudes de onda desarrollada por Antoine Roederer [1]. La antena se alimenta por medio de una línea coaxial y está terminada en una impedancia de carga, por lo que presenta un comportamiento de onda progresiva. Aunque en principio la antena nació para aplicaciones en comunicaciones móviles en Banda L (1500 Mhz), se presenta en este trabajo la caracterización experimental de una antena de cruz de ocho ramas que trabaja en 10 GHz, con la intención principal de servir como alimentador de un reflector parabólico para comunicaciones satelitales.
The Tammes Problem
Authors: Antoniano Enrique
Published: July 2020

We submit an outline for the solved cases of Tammes problem. We give an elementary proof that the Platonic polihedra; tetrahedom, octaedronm and icosahedrom are the solutions for 4, 5 and 12 respectively, based on the determination of the triangles with minImun area. We higlight the concept of star of a vertex, and how the determination of the minimun area stars lead to the solution for the cases 8 and 24.
PERSEPSI PARA GURU SMA DWIJENDRA TERHADAP KUALITAS PROGRAM SIARAN RADIO KOMUNITAS DWIJENDRA 107.7 FM
Authors: Adi Novayanti Ni Made , Astri Ariesta Damayanti Ni Nyoman
Published: July 2020

Sejak diberlakukan Undang-Undang No 32 Tahun 2002 tentangPenyiaran, radio komunitas kini dapat beroperasi dengan baik di Indonesia. Radio komunitas di Indonesia patut diberikan perhatian untuk  mewujudkan kualitas penyiaran yang baik. Salah satu  radio komunitas di Indonesia adalah Radio Komunitas Dwijendra 107.7 FM, yang dimana radio tersebut merupakan radio komunitas pertama di Indonesia dan akan sangat baik apabila mendapat perhatian yang lebih.

Penelitian ini mempunyai dua rumusan  masalah yaitu: Bagaimanakah persepsi para Guru SMA Dwijendra terhadap kualitas program siaran RaKom DJ? Apa saja masukan-masukan dari Guru SMA Dwijendra terhadap RaKom DJ? Informan yang peneliti pilih ada 3 adalah informan yang pernah bersiaran lebih dari 5 (lima) kali di RaKom DJ. Tujuannya adalah untuk mengetahui tanggapan tentang kualitas Radio Komunitas Dwijendra dan mewujudkan penyiaran yang baik di Indonesia.

Penelitian ini menggunakan metode pendekatan deskriftif kualitatif yang artinya pengumpulan data berupa uraian atau pernyataan. Dengan menggunakan subjek penelitian purposive sampling yaitu pengumpulan data dengan sengaja berdasarkan suatu karakteristik atau ciri-ciri, yaitu: Guru SMA yang pernah bersiaran lebih dari 5 kali di RaKom DJ.

Setelah melakukan penelitian, dapat ditarik kesimpulan bahwa kualitas dari Radio Komunitas Dwijendra dari aspek: manajemen program, susunan program acara, kualitas penyiar, respon pendengar, sarana dan prasarana serta keterkaitannya dengan Yayasan Dwijendra adalah baik. Kemudian masukan-masukan untuk RaKom DJ tidak ada yang mengkhusus, hanya saja tentang lebih sering diadakannya acara Dunia Pendidikan
Novel Approaches to Early Pregnancy Detection
with Decreased Mortality Rate
Authors: Kaur Mandheer , Magotra Ankit , Kumar Love , Menon Vikas , Kaur Palki Sahib , Babu Arockia M.
Published: July 2020

To achieve better reproductive management rapid and reliable diagnostic tools are compulsory. Quick pregnancy recognition
not only reduces the calving interval but also provide timely cure of disorders and mishappenings. Cattle, the economic animal in India is
well known for pregnancy losses and postpartum related difficulties. In absence of medical aids and awareness this situation is getting more
prominent. Although variety of traditional methods are in practice since decades but none of them qualifies for ideal candidate for diagnosis.
These methods fail on technical ground in specificity, sensitivity and accuracy. With advancement in Biotechnological applications in animal
sector, a new hope for getting novel biomarkers for pregnancy diagnosis has been raised. This review attempts to highlight and compare
conventional and innovative approaches to detect bovine pregnancy early with low mortality rate.
Efficient Task Allocation Based on Green
Computing in Private Cloud
Authors: single Neeraj
Published: July 2020

Cloud computing is a rapidly emerging new paradigm for delivering computing as a service. There are many research issues in cloud computing. Resource allocation is one of the challenging tasks in cloud environment. The main aim of resource allocation to reduce the infrastructure cost associated with companies. The resources offered in the cloud are probably heterogeneous and extremely dynamic. Due to this dynamic access, load balancing of jobs required. Cloud computing resource allocation should be elastic and intelligent, based on application demand and user requirements [1].Green cloud computing is a trend which has become popular with the emergence of internet driven services in every field of life. It refers to the prospective environmental advantages that computer based internet services can guarantee to the environment, by processing huge amount of data and information from collective resources pool.load balancing in an efficient way so that the resource utilization can be maximized and the energy consumption of the data centre could be minimized that can further result in reducing global warming. We have concluded the parameters that should be analysed and improved that will result in reduction of global warming and will increase the profits of cloud provider and the client. Cloud computing resource allocation should be elastic and intelligent, based on application demand and user requirements. Green cloud computing is a trend which has become popular with the emergence of internet driven services in every field of
life
Assessment of Oral Chemotherapeutic Agents Safe Handling Among Healthcare Professionals in Saudi Arabia
Authors: Ibrahim Nagwa , Al Mutairi Meznah , Al Onazi Mona
Published: July 2020

Introduction: Traditionally, chemotherapeutic agents are administered as an intravenous infusion. Over the past decade, oral chemotherapy drugs are used increasingly as a treatment modality. The risk of harm and toxicities of oral chemotherapy compared to intravenous dosage form are the same. Application of best practice to ensure safe storage, handling, administration and disposal of oral chemotherapeutic agents is necessary to prevent exposure of the environment, healthcare professionals, patients, family members and caretakers to hazardous substances.

Objectives: The objectives of this study are to assess the knowledge of pharmacy staff and oncology nurses about safe handling of oral chemotherapy and to establish recommendations based on study results. Materials and methods: A descriptive survey design was developed. Data was collected through a structured questionnaire consisting of 5 sections (demographic data, storage, handling, disposal & cleaning of contaminated materials and training & education). Data was analyzed using IBM SPSS Statistics for Windows, version 17. Results: We collected 1000 surveys from four major tertiary care hospitals in Riyadh, Saudi Arabia. Most of the surveys were completed by pharmacists (52.6%), pharmacy technicians (26.7%) and oncology nurses (20.7%). The majority of participants had 2-5 years of experience (36.8%). Females composed 58.9% of the study population with five hundred eighty nine participants. Most of participants were working in the inpatient pharmacy (42%). Separating oral anticancer agents (OACAs) from non chemotherapeutic agents was acknowledged by 93.8%. On the other hand, only 16.8% of the participants reported that OACAs should not be stored in alphabetical order with other non chemotherapeutic drugs. Less than half of the participants (42.9%) confirmed the equal risk of harm of OACAs versus intravenous form of chemotherapy. Conclusions: Our results demonstrated lack of knowledge among pharmacists, pharmacy technicians and oncology nurses regarding the risk of harm related to OACAs versus intravenous form of chemotherapy. Therefore, we recommend further education, awareness, development, and implementation of best practice guidelines about oral chemotherapy drugs safe handling in order to prevent any harmful effects to healthcare professionals and caregivers dealing with chemotherapy.
Assessing the Level of Awareness for the Optimal Use of Medication Among Saudi Community
Authors: A. Al-Omari Bedor , Alyahya Khalid
Published: July 2020

Introduction: Self-medication can lead to several unwanted consequences. Therefore, it is important to ensure that the selected medication is safe and effective in order to meet the required health needs. The aim of this study is to assess the patients’ attitude, knowledge and practice towards the use of safe medication and to evaluate the awareness level for optimal medication use among the Saudi community. Materials & Methods: We conducted a cross-sectional study using a validated questionnaire from “Survey of Medication Knowledge and Behaviors Among College Students in Taiwan” that was translated into Arabic language and validated for use in our study. Results: A total number of 1,576 participants were included. Questions evaluating knowledge about drug-food interactions and the appropriate use of antacids had the lowest number of correct responses, with a response rate of 44.73% and 38.32% respectively. Among these, 952 participants (60.41%) mentioned their effective awareness level regarding pharmacist consultations; however, 624 participants (39.59%) had limited information and awareness regarding pharmacist consultations and medication dispensing. Pharmacist trust as a healthcare expert in providing drug information was evaluated in participants without healthcare professionals or medical students as family members (62.46%), healthcare professional family members (76.74%) and medical student family members (75.21%) with a statistical significance between the first two groups (p <0.001) .
Conclusions: The majority of our study population demonstrated inadequate attitude, knowledge, and practice related to safe use of medications. This was more pronounced especially in participants without family members as healthcare professionals or medical students. We recommend the adoption of immediate interventions by pharmacists in order to improve the awareness about attitude, drug knowledge. Therefore, leading to improvements in safe medication practices in the Saudi community.

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