bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fauna of the Pivka Intermittent Lakes
Authors: Pipan Tanja 
Published: June 2021

Prispevek opisuje vodno favno presihajočih Pivških jezer. Zaradi presihajočega značaja jezer so bili na tem območju najdeni zanimivi predstavniki nižjih rakov, predvsem iz skupin škrgonožcev (Anostraca), vodnih bolh(Cladocera) ter ceponožcev (Copepoda). Petelinjsko jezero je edini kraj na svetu, kjer še lahko najdemo endemne rakce vrste Chirocephalus croaticus. Vrsti ceponožnih rakov Diaptomus cyaneus in Diacyclops Charon sta relativno pogosti vrsti v Evropi, vendar sta Petelinjsko in Veliko Drskovško jezero v Sloveniji trenutno edini znani nahajališči obeh vrst. Vrste so ogrožene zaradi uničevanja njihovih naravnih habitatov. The present contribution deals with aquatic fauna of the Pivka intermittent lakes. Due to their intermittent character some interesting crustaceans from the groups of fairy shrimps (Anostraca), water fleas (Cladocera) and copepods (Copepoda) are found there. Petelinjsko jezero is the only known location in the world for the endemic species Chirocephalus croaticus. Copepod species Diaptomus cyaneus and Diacyclops charon are relatively abundant in Europe, but Petelinjsko jezero and Veliko Drskovško jezero are the only two locations known in Slovenia for both species. All the species are threatened due to destruction of their natural habitats.
Presihajoča jezera Zgornje Pivke - varstvo skozi čas
Authors: Cernatič-Gregorič Anica , Gorkič Mirjam 
Published: June 2021

Članek podaja pregled organiziranega varstva presihajočih jezer Zgornje Pivke na podlagi predpisov s področja ohranjanja narave od konca šestdesetih let dvajsetega stoletja. Še posebej natančno pojasnjuje sedanje varstvo jezer na podlagi zakona o ohranjanju narave. Poleg varstvenih usmeritev za ohranjanje značilnih lastnosti jezer navaja nekatere z vidika varstva narave najprimernejše možnosti vključevanja območja presihajočih jezer v razvojne načrte. The article presents an overview on organized protection of the intermittent lakes in the Upper Pivka based on nature protection legislation starting from the late 1960s. It includes details on the present protection status of the lakes based on the Act on nature conservation (Zakon o ohranjanju … 2004). Besides protection guidelines to preserve the lakes characteristics some most appropriate possibilities to introduce this area into development plans are also discussed.
Gouverner une crise sanitaire par le savoir et l’incertitude : le cas des agrégats de « bébés nés sans bras » en France
Authors: Pedrot Florian 
Published: June 2021

À l’automne 2018, la France découvre, par les médias, l’existence de cas groupés inexpliqués de bébés nés avec des malformations en plusieurs endroits du territoire. Et que de surcroît, après avoir enquêté, les autorités sanitaires n’ont trouvé aucune cause commune aux agrégats et ont jugé inutile de poursuivre les recherches. Tous les ingrédients d’une crise sanitaire sont présents, mais celle-ci fait long feu, non en raison du petit nombre de cas répertoriés (une quinzaine), mais plutôt du fait de la difficulté à établir des relations de cause à effet dans le domaine de la santé environnementale, auquel ce dossier appartient. Aussi, cette histoire permet d’éclairer un aspect saillant du gouvernement contemporain des crises sanitaires : la propension des autorités à mettre en avant l’état des savoirs et des doutes pour justifier leur action. C’est à un tel gouvernement des crises sanitaires dans et par les connaissances scientifiques que cet article est consacré.
« La crise est notre quotidien ». Comment l’urgence est-elle prise en compte au SAMU ?
Authors: Hert Philippe , Grassineau Dominique 
Published: June 2021

Au-delà de la crise actuelle des services d’urgence des hôpitaux en France, nous interrogeons le fonctionnement au quotidien d’un centre de réception et de régulation des appels du SAMU de Marseille. Notre écriture est à deux voix : issue d’un terrain ethnographique, et en dialogue avec une médecin urgentiste. Nous focalisons notre propos sur les enjeux autour de la qualification (par qui, quand et comment ?) du degré d’urgence ou de la situation de crise à évaluer dans un temps contraint. Nous mettons en perspective ces enjeux à partir des formes de leur prise en compte : dans le cadre de quels dispositifs, avec quelle écoute et selon quelle organisation collective ? Nous donnons à voir une partie de l’activité invisible qui participe pourtant de cette qualification et de cette catégorisation de l’urgence. En outre, nous examinons les modalités singulières qui conduisent à une décision médicale soumise à une mise en récit par le requérant en crise, premier modèle d’une télémédecine en devenir. Les situations présentées ici contribuent à rendre compte plus généralement de la situation de crise que vit le secteur de la santé.
Expériences de « crises » à l’hôpital : sécurisation et humanisation des urgences
Authors: Ridel Déborah 
Published: June 2021

Les services d’urgence sont-ils en crise ? Les événements récents, grève nationale et pandémie, semblent le confirmer. Mais la thématique de la crise des urgences semble plus ancienne. Engorgement des urgences d’une part et violence des patients d’autre part se sont progressivement constitués en problèmes publics et laissent entrevoir une crise des urgences plus structurelle que conjoncturelle. Deux dispositifs institutionnels sont préconisés au niveau national afin de lutter contre les violences et désengorger les services d’urgences : la sécurisation et l’humanisation. À travers une enquête ethnographique longitudinale portant sur la restructuration de l’accueil dans le service d’urgence d’un centre hospitalier non universitaire, nous allons analyser l’impact de ces dispositifs sur le terrain. En cela, cet article montre que si le problème de l’engorgement des urgences semble avoir été résolu, la violence quant à elle n’a pas totalement disparu et s’est peu à peu transformée en souffrance au travail.
Attitude towards COVID-19 vaccine among the general public in south India
Authors: Godasi Ganga Raju , Donthu Raj Kiran , Mohammed Abdul Salaam , Pasam Ravi Sankar , Tiruveedhula Sri Lakshmi 
Published: June 2021

Introduction:
Coronavirus disease-19 (COVID-19) is a novel infection that sets off a pandemic in a short period. Research has been going on to develop safe and effective vaccines and around 150 are in the process of development. In India, two vaccines have been given emergency approval. There has been a rise in hesitancy toward vaccination not only in India but also worldwide.

Materials and Methodology:
The study included 697 participants who were not vaccinated. The study questionnaire was administered through online Google Forms and included informed consent, sociodemographic details, questions related to COVID-19 infection and vaccine, and vaccine attitude examination (VAX) scale.

Results:
Among the 697 participants, 216 (31%) were not willing to get vaccinated. Those with prevailing mental (P = 0.011) or physical health (P < 0.001) problems were of negative opinion toward vaccination because of unforeseen complications. Participants with lower education (P = 0.041), skilled to semi-skilled job (P = 0.028), and joint family (P = 0.006) opined that vaccination was more of commercial profiteering for manufacturing companies. Participants who were married (P = 0.010) and living in a joint family (P = 0.009) setting were more inclined toward a preference for natural immunity.

Conclusion:
The study highlights that 69% of participants were willing to take the COVID-19 vaccine. Various measures can be taken by different stakeholders to improve the positive attitude. As medical professions, we can improve the positive attitude by actively taking the vaccine and educating the local people about the benefits.
A cross-sectional study of psychological distress among doctors' spouses during COVID-19
Authors: Goud Sripathi Santhosh , Indla Vishal , Deshpande Manjiri , Reddy Indla Ramasubba 
Published: June 2021

Introduction:
Coronavirus disease 2019 (COVID-19) infection and subsequent lockdown restrictions brought drastic changes in the lives of the people. Doctors' community led the fight against COVID-19 as frontline warriors leaving their families at home for prolonged periods. The psychological issues among the family members, particularly spouses of doctors, are significantly high and need special attention.

Aims:
We aimed to assess the level of psychological distress among doctors' spouses and the possible relationship between different variables and the level of the distress.

Materials and Methods:
The study was conducted in online mode using chain-referral sampling method. Sample size was 120 and comprises doctors' spouses who were not related to medical field. Those who were working in medical field or having any past psychological illness were excluded from the study. A semi-structured pro forma was used to collect the basic demographic details, and Kessler's Psychological Distress Scale (K10) was used to rate psychological distress.

Results:
72.5% of the study population had reported psychological distress, and half of these participants reported severe psychological distress. Age was the single variable that had significance (P < 0.1), whereas other variables did not show statistically significant values.

Conclusion:
Psychological distress is much higher compared to the general population in the spouses of the doctors. In long run, this may result in psychological illnesses such as depression and anxiety disorders. As a special group, these require targeted interventions and care for the prevention of severe mental health problems.
ANALYSIS OF PRESSURE VARIATION OF FLUID IN AN INFINITE ACTING RESERVOIR
Authors: Erhunmwun ID , Akpobi JA 
Published: June 2021

In this work, we investigate the well pressure distribution in a boundless reservoir. This research work seeks to know the pressure variation in a reservoir whose pressure disturbance caused by the withdrawal of fluid from the wellbore, is yet to be felt at the external boundaries of the reservoir. The diffusivity equation was used in the analysis. The work covers the transient state where the reservoir is acting as if it was infinite in size. The finite element technique, using Lagrange quadratic shape elements was employed to carry out the analysis over the cross-section of the reservoir. The analysis was done with the assumption that before the well begins production, there was uniform distribution of pressure all through the reservoir. The accuracy of the result was validated by comparing with the results published by Chatas and Lee. The comparison shows a strong positive correlation between the two methods. Also, the results published by Chatas and Lee stated only the pressure at the wellbore at a particular time but this work predicts the pressure variation in the entire reservoir from the wellbore to the infinite sized external boundary at the same time. http://dx.doi.org/10.4314/njt.v36i1.11
SCANNING SPEED INFLUENCE ON THE PHYSICAL PROPERTIES OF LASER METAL DEPOSITION TITANIUM ALLOY
Authors: Mahamood RM , Aweda JO , Ajao KR , AbdulKareem S , Ajimotokan HA 
Published: June 2021

The most commonly used aerospace titanium alloy, Ti6Al4V, was deposited on Ti6Al4V plate of dimension 72 x 72 x5mm. The laser power of 3 kW, powder flow rate of 1.44 g/min and gas flow rate of 4 l/min were used throughout the deposition process. The transverse/ scanning speed was varied between 0.005 to 0.095 m/sec according to established result of the preliminary study that produces full dense and pore free deposits. The mass of the deposited powder was obtained by weighing the substrate before the deposition and reweighing after the deposition. The substrate and the deposits were thoroughly cleaned using wire brush and acetone to remove unmelted powder particles from the surface of the substrate and the deposit. The height and width of the deposits were measured with Venier Caliper and the material efficiencies were determined using developed equations. The objective of this research is to determine the influence of the scanning speed on the material efficiency and deposit height in laser metal deposition of titanium alloy- Ti6Al4V. The results of this study showed that, for the set of processing parameter used in this study, the optimum scanning speed was at 0.015 m/sec with the optimum material utilization efficiency of 83.33% and the deposition height of 1.09 mm. http://dx.doi.org/10.4314/njt.v36i1.17
AN ARCHITECTURE-BASED TECHNIQUE TO MOBILE CONTACT RECOMMENDATION FOR EMERGENCY SITUATION IN NIGERIA
Authors: Akigbe BI , Ikono RN , Ejidokun AO , Aderibigbe SO , Afolabi BS 
Published: June 2021

Smart technologies such as smart phones, iPad and Tablets are ubiquitous in today’s society. They possess increasing computing and storage potentials. Thus, emerging as a dominant computing platform for different kinds of end-users. However, these technological possibilities have not been fully explored for emergency situations where close relatives must be contacted. This paper therefore presents an Emergency Contact Recommendation Model (ECRM) that was implemented into an emergency contact recommendation system. An architectural based approach was employed to highlight the contribution this paper made to extant knowledge. The leveraged of the Dust miner algorithmic technique, the direct discriminative pattern mining, and the Bayesian Inference Network technique were used to formulate the ECRM. The ECRM was implemented using the Java development and android tool kit. The model demonstrated commendable capabilities - considering the foregoing techniques when compared with what obtains in literature- to make useful recommendation in emergency situation(s) after implementation. http://dx.doi.org/10.4314/njt.v36i124
CURRENT STATUS AND OUTLOOK OF RENEWABLE ENERGY DEVELOPMENT IN NIGERIA
Authors: Akorede MF , Ibrahim O , Amuda SA , Otuoze AO , Olufeagba BJ 
Published: June 2021

Over 80% of the current Nigerian primary energy consumption is met by petroleum. This overdependence on fossil fuels derived from petroleum for local consumption requirements should be a serious source of concern for the country in two ways – depletion of the resources and negative impact on the environment. This paper presents a critical review of the available renewable energy resources in Nigeria, namely; biomass, hydropower, solar and wind energy. It examines the current energy situation in the country and equally discusses the various energy policy documents developed by the government. Using the scenario-based International Atomic Energy Agency models, the projected energy demand and supply structure of the country through 2030 are presented and analysed. Overall, this study shows that Nigeria will overcome her present energy crisis if she explores the abundant renewable energy resources in the country. The data presented in this paper is a crucial eye-opener for relevant government agencies towards developing these energy resources in tackling the present energy crisis in Nigeria. http://dx.doi.org/10.4314/njt.v36i1.25
DYNAMICS OF RECTANGULAR ORTHOTROPIC PLATES USING CHARACTERISTIC ORTHOGONAL POLYNOMIAL – GALERKIN’S METHODS
Authors: Osadebe NN , Attama CM , Oguaghamba OA 
Published: June 2021

The assumed deflection shapes used in the approximate methods such as in the Galerkin’s method were normally formulated by inspection and sometimes by trial and error, until recently, when a systematic method of constructing such a function in the form of Characteristic Orthogonal Polynomial (COPs) was developed by Bhat in 1985. In the vibrational analyses of orthotropic rectangular plates with different boundary conditions, the study used the characteristic orthogonal polynomial theory to obtain satisfactory approximate shape functions for these plates. These functions were applied to Galerkin indirect varational method to obtain new set of fundamental natural frequencies for these plates. The results were reasonable when compared with those in the previous work. All round simply supported thin rectangular plate (SSSS), rectangular clamped plated (CCCC) and rectangular plate with one edge clamped and all others edges simply supported (CSSS) gave 5.172, 9.429 and 6.202 natural frequencies in rad /sec respectively at 0.05%, 0.0% and 22.93% difference with the previous[3] results5.170rad/sec, 9.429rad/sec and 8.048rad/sec for SSSS, CCCC and CSSS. For others like: rectangular plate with one edge simply supported and all other edges clamped (CCSC), rectangular plate simply supported at two opposite sides and clamped at the others (CSCS) and rectangular plate clamped at two adjacent sides and simply supported at the others (CCSS) with no available results, their natural frequencies obtained are 8.041rad/sec, 6.272rad/sec and 7.106rad/sec respectively. http://dx.doi.org/10.4314/njt.v36i1.8
DESIGN AND OPERATIONS CHALLENGES OF A SINGLE TOGGLE JAW CRUSHER: A REVIEW
Authors: Okechukwu C , Dahunsi OA , Oke PK , Oladele IO , Dauda M , Olaleye BM 
Published: June 2021

A review on the design and operations challenges of a single toggle jaw crusher is presented. Strength and fracture toughness of the material to be crushed are intrinsic properties that determine the time and energy required to crush the material. Economy of the crushing process is partly dependent on the angle of nip. Productivity of the crusher can be improved upon by increasing the eccentricity of the eccentric shaft, use of reversible jaws, bush bearing and easily adjustable toggle plate. Vibrations and fatigue cracks in the crusher frame will be nipped in the bud through structural analysis at design stage. Determination of the optimal angle of inclination of the toggle plate, development of jaws with varying wear rate along the crushing chamber, and development of comminution energy models that take into cognizance relevant crushing parameters for simulation and optimization of the crushing process are some areas that require close attention. Â http://dx.doi.org/10.4314/njt.v36i3.22
EFFECTS OF METAL INERT GAS WELDING PARAMETERS ON SOME MECHANICAL PROPERTIES OF AUSTENITIC STAINLESS STEEL IN ACIDIC ENVIRONMENT
Authors: Omiogbemi IMB , Yawas DS , Dagwa IM , Okibe FG 
Published: June 2021

The purpose of the present study is to investigate the effects of metal inert gas (MIG) welding parameters on the mechanical properties (hardness, tensile and impact) of type 304 austenitic stainless steel (ASS) immersed in 0.5M hydrochloric acid at ambient temperature. The MIG welding was applied to 3mm thick ASS. The dimensions of the samples were 50mm x 15mm x 3mm and 120mm x 15mm x 3mm rectangular bars each for impact, hardness and tensile tests and for immersion in the medium. Design Expert Software, Scanning Electron Microscopy (SEM), Rockwell Hardness Test, Monsanto Tensometer and Izod Impact Test were used to determine the interactions of parameters, microstructural analysis and optimal performances of the parameters respectively. Experimental results indicate that tensile strength increased with increase in welding parameters from 120MN/m2 to 133MN/m2 at speed of 40cm/min and current of 110. when the properties are compared with varying weld parameters adopted in jointâ€™s weld operations, there was a pattern displayed among the weld parameters with C3 (19.7HRA, 203N/mm2 and 19.7J )and C4 (14.9 HRA, 189N/mm2 and 14.9J) consistently coming out as the parameter producing an ASS weld joint with the best mechanical properties of hardness, tensile and impact strength. Surface corrosion deposit composition was analyzed with the SEM paired with energy dispersive spectrometer (EDS) to ascertain microstructural behavior of the material. Â Â http://dx.doi.org/10.4314/njt.v36i3.25
TECHNO-ECONOMIC INVESTIGATION OF DIFFERENT ALTERNATIVES OF IMPROVING SIMPLE GAS TURBINE INTEGRATION OPTIONS
Authors: Sulaiman MA , Waheed MA , Adesope WA , Noike A 
Published: June 2021

This study investigated the effect of integrating various models proposed to improve a simple gas turbine power plant. A computer program was developed in Matlab software was used to simulate the performance parameters. The energy and exergy analysis of the plant was carried out. The energy and exergy analysis result revealed that both energy and exergy efficiency of plant is low as a result three improvement options were considered. They include Model 1: reducing inlet air cooling (IAC) of the compressor by using the wasted energy in the natural gas pressure drop station. Model 2: recovering wasted energy in the exhaust through heat recovery steam generator (HRSG) and injecting steam into the combustion chamber and lastly Model 3: by combining the two methods. The result showed that among the three methods of improving the plant investigated Model 3 was found to boost power output of the plant from 28.3 MW to 78.4 MW while the thermal and exergetic efficiency improved by 25.5 and 23.6% respectively. Furthermore, from economic and environmental point of view, the lowest levelized cost of electricity as well as the specific emissions was observed in Model 3. Consequently, Model 3 is selected as the best option in improving the simple gas turbine. Â http://dx.doi.org/10.4314/njt.v36i3.27
IMPROVEMENT OF POWER SYSTEM QUALITY USING VSC-BASED HVDC TRANSMISSION
Authors: Eyenubo OJ , Oshevire P 
Published: June 2021

The HVDC technology can be represented by the combination of a Direct Current (DC) circuit with two power electronics converters, each one at a link terminal, for AC/DC and DC/AC conversion The principal characteristic of VSC-HVDC transmission is its ability to independently control the reactive and real power flow at each of the AC systems via the Point of Common Coupling (PCC). The active and reactive power is related to the power angle and the magnitude ofÂ voltage in the reference -frame selected such that the quadrature component will result in the ratio between the maximum fundamental peak phase voltage and the DC total voltagehttp://dx.doi.org/10.4314/njt.v36i3.31
MULTIBAND MILLIMETER WAVE T-SHAPED ANTENNA WITH OPTIMIZED PATCH PARAMETER USING PARTICLE SWARM OPTIMIZATION
Authors: Jabire AH , Abdu A , Salisu S 
Published: June 2021

This paper proposed a simple T-shaped patch antenna for millimeter waveband frequency operation. Millimeter wave is a frequency ranges between 30GHz to 300GHz in an electromagnetic spectrum. The proposed antenna consists of T-shape radiating patch mounted on rectangular substrate (FR4-4) and microstrip line for antenna feeding. An evolutionary algorithm called particle swarm optimization was used to optimize the length and width of the proposed antenna patch. The proposed antenna gives triple bands with central frequencies at 42GHz, 51.5GHz and 60GHz. The antenna offers minimum return loss of -19db, -24db and -19.5db at 42GHz, 51.5GHz and 60GHz respectively. The return loss impedance bandwidth of 5GHz for the first band, 8.4GHz for the second band and 5GHz for the third band was obtained. The proposed antenna was analyzed using Ansoft High Frequency Structure Simulator (HFSS) and MATLAB 2013. Radiation characteristics of this patch antenna are observed at various resonating frequencies.Â Â http://dx.doi.org/10.4314/njt.v36i3.33