bluuebunny/crossref_metadata_2025 huggingface dataset:
Japanese Bulb Onion: Production, Consumption, and Cultivars
Authors: Tsuchiya Yusuke , Nakamura Yusuke , Mikami Tetsuo
Published: April 2021

Bulb onion is an ancient vegetable crop that has been cultivated for at least 5,000 years. In Japan, this cultivation has only 150 years of history, but nowadays, it ranks fourth in total production, fourth in cropping acreage, and second in consumption among vegetables grown domestically. Until the 1970s, open-pollinated onion cultivars were predominantly cultivated throughout the country; they were selected mainly from old US cultivars. Over the past three decades, these open-pollinated cultivars have been replaced with F1 hybrid cultivars that offer higher yield, better disease resistance, uniformity at maturity, and high bulb quality. In this review, an attempt is made to characterize the commercial production and consumption of Japanese bulb onion as well as agronomic characteristics of representative cultivars.
Geology and genesis of vein-type corundum deposits in the Hafafit-Nugrus area, South Eastern Desert, Egypt
Authors: Mahmoud Soliman Abu Elatta A. , Ali Hani H.
Published: April 2021

Unusual deposits formed by corundum are described from two separate pegmatitic veins in the Hafafit-Nugrus area of the South Eastern Desert of Egypt. Other related minerals are described too. The vein-type of corundum at Locality 1 (Vein 1) crosscuts through exposed rocks of an ophiolitic mélange, whereas at Locality 2 (Vein 2), it crosscuts through exposed serpentinised ultramafic rocks. The main minerals in Vein 1 are plagioclase, corundum, grossular, phlogopite, muscovite and clinochlore, while almandine, xenotime-(Y), allanite-(Ce), zircon, Cr-rich spinel, apatite, titanite, fergusonite-(Y), meta-ankoleite, U-rich thorite (uranothorite), carbonate and illite are the accessories. In Vein 2, the main minerals are plagioclase, corundum, phlogopite and chlorite, while clinochlore, euxenite-(Y), Nb-rich rutile, almandine, xenotime-(Y), allanite-(Ce), zircon, spinel, apatite, titanite, kasolite, dickite, illite, carbonate, antigorite and talc are accessories. The two types of corundum veins differ in their concentrations of Th, U, Zr, Nb, Ta, REE, Y and Li in whole-rock compositions. Field observations, mineralogy and chemical analyses of samples from the two veins of corundum deposits, as well as concentrations of chromophore elements in corundum crystals, suggest metasomatic origins. The present study suggests that the two types of corundum veins formed at different ages from different residual magmas that underwentin-situhybridisation with the host rocks.
Analysis of reservoir parameters on the basis of well logging and DST of Miocene gas reservoirs in the central part of the Carpathian Foredeep, Poland
Authors: Maruta Michał , Solecki Marek L. , Chruszcz-Lipska Katarzyna , Stachowicz Katarzyna , Dubiel Stanisław , Zubrzycki Adam
Published: April 2021

In the Polish part of the Carpathian Foredeep, an intensification of gas exploration and exploitation from Miocene strata took place in the middle of the twentieth century. In spite of a good degree of geological and reservoir recognition, the area of the Carpathian Foredeep is still considered to be prospective for the discovery of new gas reservoirs. Here we analyse statistically selected reservoir parameters of Miocene deposits, such as total porosity, effective permeability and reservoir water inflow. These parameters have been determined on the basis of interpretations of results of well logs and reservoir tests with tubular bed samplers (DST, Drill Stem Test). Analytical results in the form of regression and dependence of the logarithm of permeability as a function of porosity show a weak correlation. However, in the study area, the distribution of porosity values for Miocene strata is close to normal.
The Influence of Mass Loss on Wooden Elements Case Study
Authors: Teodorescu Ioana
Published: April 2021

The durability of wooden structures is a subject of great interest because a better understanding of the evolution of wooden elements is needed, together with the factors that intervene in the degradation process and the manner in which they can be prevented. The exposure time of structures to environmental variations is important because the presence of humidity is affecting wooden elements the most. Their exposure to humid surroundings or in which temperature and humidity variations are not constant, increases the moisture content of wood and leads to the formation of biological environments that attack the wood and reduce its resistance, intervening in the building safety and utility. The current study follows the evolution of a wooden structure subjected to changes of the transversal section due to the presence of humidity until the moment in which the wooden piece does not verify anymore the safety conditions from the calculations for compression, tension and bending.
Enhancing color quality of WLEDs with dual-layer remote phosphor geometry
Authors: That Phung Ton , Loan Nguyen Thi Phuong , Van Tho Le , Anh Nguyen Doan Quoc , Liao Hsing-Yuan , Luo Guo-Feng , Lee Hsiao-Yi
Published: April 2021

Usually, remote phosphor structures are beneficial in terms of flux but unfavorable in terms of color quality compared to conformal phosphor or in-cup phosphor packages. To eliminate this disadvantage, many studies have focused on increasing the chromatic quality of the remote phosphor configuration, which requires great efforts in improving two parameters of color: color rendering index (CRI) and color quality scale (CQS). CRI is known as the most useful quantitative method used to measure the ability of a light source to reproduce the colors of illuminated objects faithfully and naturally. Similarly, CQS is also a method of lighting quality determination and analysis, especially used as an alternative to the unsaturated CRI colors. In this paper, we proposed dual-layer remote phosphor structure as a novel method of CRI and CQS enhancement to improve WLEDs’ color quality. Five alike WLEDs but having different color temperatures in the range of 5600 K to 8500 K were applied in this study. The idea behind the study is to place a red phosphor layer SrwFxByOz:Eu2+,Sm2+ on the yellow phosphor layer YAG:Ce3+ and then determining an appropriate concentration of SrwFxByOz:Eu2+,Sm2+ added to achieve the highest color quality. The results point out that SrwFxByOz:Eu2+,Sm2+ brings great benefits to the improvement of CRI and CQS parameters. Specifically, the higher the SrwFxByOz:Eu2+,Sm2+ concentration results in the greater CRI and CQS, owning to the enriched red light components in the WLEDs. However, the flux has a tendency of dropping when SrwFxByOz:Eu2+,Sm2+ concentration rises excessively. This has been proved by using the Mie-scattering theory and the Lambert-Beer law. The results of this article are essential references for manufacturing WLEDs with higher chromatic quality.
Growth and study of 4-sulfobenzenaminium potassium dihydrogenphosphate for mechanical, dielectric and photonics applications
Authors: Vinoth E. , Vetrivel S. , Gopinath S. , Mullai R.U. , Aruljothi R. , Suresh T.
Published: April 2021

This article describes the growth and characterization of 4-sulfobenzenaminium potassium hydrogen phosphate (SPH) sulphanilic acid with potassium dihydrogen phosphate (KDP) doped semi-organic single crystals. The crystal was grown by the slow evaporation method. Examination of the crystalline nature of the sample was carried out by single crystal X-ray diffraction and it confirmed that the sample crystallizes in orthorhombic structure in the centrosymmetric space group P212121. The optical transmittance behavior was tested by UV-Vis spectral analysis. FT-IR spectral investigations have been carried out to indicate the presence of functional groups. The chemical structure of the compound was established by 1H and 13C NMR spectra. The SHG efficiency of the powdered SPH crystal is around 1.7 times that of pure KDP. The grown crystal was stable up to 270 °C as observed from TGA and DTA curves. The microhardness test was carried out to study the load dependency of hardness. The result of this study indicates that SPH crystal is a malleable material. From the hardness values, the stiffness constant and yield strength were calculated. The dielectric response of the novel crystal was studied in the frequency range of 50 Hz to 5 MHz at various temperatures. By employing FE-SEM, the surface morphology and the particle size of the crystal were assessed.
New Electronic Interface Circuits for Humidity Measurement Based on the Current Processing Technique
Authors: Petrović Predrag B. , Nikolić Maria Vesna , Tatović Mihajlo
Published: April 2021

The paper describes a new electronic conditioning circuit based on the current-processing technique for accurate and reliable humidity measurement, without post-processing requirements. Pseudobrookite nanocrystalline (Fe2TiO5) thick film was used as capacitive humidity transducer in the proposed design. The interface integrated circuit was realized in TSMC 0.18 μm CMOS technology, but commercial devices were used for practical realization. The sensing principle of the sensor was obtained by converting the information on environment humidity into a frequency variable square-wave electric current signal. The proposed solution features high linearity, insensitivity to temperature, as well as low power consumption. The sensor has a linear function with relative humidity in the range of Relative Humidity (RH) 30-90 %, error below 1.5 %, and sensitivity 8.3 x 1014 Hz/F evaluated over the full range of changes. A fast recovery without the need of any refreshing methods was observed with a change in RH. The total power dissipation of readout circuitry was 1 mW.
Other flesh: Embodiment in Couple and Group Dances
Authors: Hoppu Petri
Published: April 2021

In my article, I investigate the possibilities of an embodied perspective in the research of couple and group dances. I intend to find ways to cross the boundaries between structural and cultural approaches, which have been in the main stream of the research of social dancing. In order to reach this purpose, I use the phenomenological concepts of flesh, reversibility and empathy to make a connection between the individual and community as well as form and experience. Importantly, I shall elucidate the idea of shared experience, which can be understood on the basis of these concepts. I wish to address how couple and group dances are fundamentally based on sharing certain horizons of experience, where bodies unfold themselves to other dancers through empathy in the context of shared dance forms and movement patterns. Consequently, the research of social dances should not concentrate merely on external or formal behaviour but on dancing as a part of embodied social reality.
Core Elements in The Training of Upper Secondary School Dance Pupils in Norway
Authors: Iversen Anette Sture
Published: April 2021

In Norway’s upper secondary schools, pupils can choose dance as their main subject of study in a programme designed to prepare them for higher education in general and, more specifically, higher education in dance. A committee selected by the Norwegian Directorate for Education and Training was appointed in autumn of 2015 and given a mandate to evaluate the structure of the programme and suggest changes that would increase its relevance. A reference group was selected to respond to the committee’s first draft in December 2015, before the draft was open to comments from the rest of the dance environment (spring 2016). The author took part in the reference group. In this process, several individuals representing the fields of education and professional dance argued that the traditional hegemony of the three scenic dance forms (classical ballet, jazz and contemporary dance) needs to be challenged as it no longer sufficiently prepares pupils for a career in dance. One could argue that new dance forms, personal expression, performative and collaborative skills are more in demand today. In her own teaching of contemporary dance in upper secondary school, the author has found it relevant to focus on what she sees as core elements in the training of today’s performers in addition to, and sometimes instead of, (traditional) technical exercises, especially early on in pupils’ dance education. She proposes that it would be beneficial to pupils to replace some of the technical training in the scenic dance forms with these core elements in a restructuring of the dance programmes in upper secondary education.
A Body of Accents
Authors: Dahlstedt Ami Skånberg
Published: April 2021

Dance practice is often hidden inside dance studios, where it is not available for dialogue or interdisciplinary critique. In this paper, I will look closer at one of the accents that my body has held since the year 2000. To Swedish dance academies, it is perhaps the most foreign accent I have in my dance practice. It has not been implemented as ‘professional dance’ in Western dance studios. This foreign accent is called Nihon Buyō, Japanese dance, also known as Kabuki dance. Nihon Buyō, Nō or Kabuki are local performing arts practices for professional performers in Japan. A few foreigners are familiar with these practices thanks to cultural exchange programmes, such as the yearly Traditional Theatre Training at Kyoto Art Centre. There is no religious spell cast over the technique or a contract written that it must be kept secret or that it must not leave the Japanese studio or the Japanese stage. I will compare how dance is being transmitted in the studio in Kyoto with my own vocational dance education of many years ago. Are there similarities to how the female dancer’s body is constructed? Might there be unmarked cultural roots and invisible originators of the movements we are doing today in contemporary dance?
Marcel Duchamp og postmoderne improvisasjonsdanstradisjoner, brudd og kontinuitet
Authors: Rustad Hilde
Published: April 2021

Artikkelen drøfter sammenhenger mellom Marcel Duchamp (1887–1968) sin tenkning og danseimprovisasjon og kontaktimprovisasjon som tradisjoner. Forskningsprosjektet er tuftet på erfaring utøvere av danseimprovisasjon og kontaktimprovisasjon har gjort, og undersøker forbindelser mellom Duchamp og post-moderne improvisasjonsdanstradisjoner, og på hvilke måter bevissthet om slike forbindelser kan ha betydning for tradisjonenes utøvere. Forfatteren anvender Lindholm og Gadamers (1900–2002) tradisjonsbegrep som analytisk blikk og fortolkningsperspektiv, og får fram hvordan deler av Duchamps tankegods som kan forstås som overlevert via John Cage, Merce Cunningham og Robert Rauschenberg til dansekunstnere som var ansvarlig for oppstarten av postmoderne dans, og som i dag kan forstås som inkorporert i danseimprovisasjon og kontaktimprovisasjon. Tradisjonsperspektivet bidrar videre til å belyse hvordan utøvere kan få en økt forståelse av hva det innebærer å tilhøre en tradisjon, og hvilken betydningen det har å kjenne tradisjonen man tilhører best mulig. I tillegg synliggjøres hvordan postmoderne improvisasjonsdanstradisjoner ved Duchamp har europeiske røtter i tillegg til de amerikanske, og dette gir et utvidet perspektiv og bidrar til et mer komplekst bilde av tradisjonene både innholdsmessig og geografisk.
The Potential of Dance Art in Recovery From a Stroke: A Case Study
Authors: Pohjola Hanna , Vartiainen Paavo , Karjalainen Pasi A , Hänninen Vilma
Published: April 2021

This article presents a case study on the subjective experience of recovering from a stroke. The aim was to seek personal meanings attached to the process of a solo choreography and its relationship with the subjective reconstruction of the body.

The qualitative research used a stimulated recall method alongside a series of in-depth interviews. According to the findings, the ‘re-inhabiting’ of the body was enabled through body awareness and improvisation with regard to the choreographic process. The physical impairment caused by a stroke shifted towards the experience of being able-bodied while dancing, thus allowing the entire body and its current possibilities to be explored. Themes such as active agency and self-efficacy also emerged. The case study suggests that dancing not only acts as an enjoyable social and physical activity but also contributes to feelings of wholeness. Connectedness with wholeness enabled reconstructed self-trust and agency.
Potential for Tunnel Technology in the Development of Hyperloop Vacuum Rail
Authors: Gospodarczyk Piotr , Stopka Grzegorz , Dybeł Piotr
Published: April 2021

Hyperloop is a new concept of transport system the main assumption of which is to use hermetic tunnels where air pressure is very low compared to atmospheric pressure. It enables significant reduction of traffic resistance and, as a result, energy consumption. One of the most important elements of this system is land infrastructure with transport tubes. This system component has a significant impact on the construction costs related to the whole system and affects its functional parameters (e.g. capsule travel speed). Appropriate configuration of the route of a new transport system will require the use of all possible ways of leading transport tubes, including tunneling. The paper presents the key premises that prove a large potential application of tunnel technologies in the development of a new transport system.
Congenital Chlamydia Infection – case presentation
Authors: Zsuzsanna Gáll , Réka Sánta , Zsuzsanna Moréh , Manuela Cucerea , Márta Simon
Published: April 2021

There are several pathogens involved in the etiology of neonatal infections. Based on etiology, these can be classified into materno-fetal and nosocomial infections. Bacteria of the Chlamydia family behave like intracellular parasites. The most well-known member is Chlamydia trachomatis, which is the cause of the most common sexually transmitted disease in developed societies.

In this case, we present a 27-days-old girl who presented at our clinic with conjunctivitis, dyspnea and coughing. Laboratory and imaging findings reported leucocytosis, eosinophilia, and bronchopneumonia. Her condition improved rapidly during antibiotic treatment, but her conjunctivitis recurred. Serological tests confirmed Chlamydia infection of the newborn. She became asymptomatic after the whole family has been cured.

In case of neonatal conjunctivitis, pneumonia and eosinophilia, Chlamydia should be considered and the whole family treated to prevent re-infections.
Mapping of Echinacea-based food supplements on the Romania market and qualitative evaluation of the most commonly used products
Authors: Elek Ferencz , Eszter Demeter , Rebeka Király , Szende Vancea , Melinda Urkon , Eszter Laczkó-Zöld
Published: April 2021

The aim of the study was to explore dietary supplements containing Echinacea on the Romanian market and their qualitative characterization.

The products available on the market were aggregated in 2018, through an electronic search based on the register of the Romanian Medicine Agency (Agenția Națională a Medicamentului şi a Dispozitivelor Medicale din România – ANMDMR) and the list of dietary supplements registered by the Ministry of Agriculture and Rural Development (Institutul Național de Cercetare-Dezvoltare pentru Bioresurse Alimentare – IBA București, Serviciul național pentru plante medicinale, aromatice și produse ale stupului). There are no Echinacea containing medicines registered in Romania. However, there are 58 dietary supplements in the register, 52% of which are mono-components, 29% contain other herbs, plant extract or vitamins, while 19% are registered as tea. The label of 80% of monocomponent products and 76% of multicomponent supplements contains insufficient information: the plant name, its used part and processing methods (grist, extract, quantity) are not clearly identified. Among the listed dietary supplements, the 12 most commonly used formulations in pharmaceutical practice were subjected to phytochemical chromatographic evaluation: TLC and/or HPLC analysis were used. Three of seven monocomponent products showed proper chromatographic fingerprint, by TLC analysis. One monocomponent sample did not have an adequate chromatographic fingerprint. The labelling of multicomponent products was not appropriate. The TLC test suggests that based on the resulting fingerprint they contain E. purpureae herba. However, due to the presence of other components, the TLC does not allow a clear conclusion regarding the exact composition of the products.

The developed HPLC method enables quantification of the concentration of caffeic acid, chicoric acid, echinacoside, chlorogenic and caftaric acids mixture in dietary supplements. None of the tested products contained echinacoside, which is a specific component of E. angustifolia and E. pallida root. In our method, the quantification of caftaric acid is approximate, because it partially overlaps the chlorogenic acid, which is a common component of plant samples, but negligible in Echinacea sp. The tested dietary supplements have a caffeic acid content of 20-140 µg/g, a chicoric acid content of 0.19-2.64 mg/g; the mixture of chlorogenic and caftartic acid is about 0.23-2.07 mg/g.
Study of pharmaceutical competences among the Romanian population, based on an online survey
Authors: Erzsébet Fogarasi , Ibolya Fülöp , Szilvia Szilveszter , Erzsébet Varga , Dumitru Croitoru Mircea
Published: April 2021

From the year 1990s the pharmaceutical competenceshttps://www.thesaurus.com/browse/assignment based on drug supply has been completed with the patient consultation and communication. This fact has greatly expanded the work of the pharmacists. As a result of this, the concept of pharmaceutical care has been introduced and normalized in several countries. But, in spite of all efforts there are still major differences in health care policies and practices among European countries. The aim of this study was to check the estimation of the pharmacists’ duties by patients and the attitude towards online medicine acquisition. Materials and methods: we used a four - part questionnaire created in Google Forms. The content of the questionnaire consisted of: a.) checking of the demographic data, b.) assessment of patients’ attitudes towards pharmacies, c.) assessment of pharmacist competences, d.) examining the viability of an online drug supply. Results and discussion: 524 persons completed the questionnaire (88.7% women, 11.3% men). 66.8% were from the city and 33.2% from the village, respectively. Patients’ adherence to pharmacies in most cases depended on the location of the pharmacy (65.1%) and the kindness (36.5%) and competence (36.5%) of the pharmacist. Checked with three parallel questions, it turned out that the number of questions occurring in the patients’ mind at home always exceeded the proportion of the answered questions in the pharmacy. 68.1% of the respondents consulted a pharmacist in the absence of a physician. Many (54.4%) of that surveyed searched healthcare information on Google search, but few of them ordered medicinal products via Internet. Based on the results of our survey, 18.3% of the respondents searched healthcare information on healthcare professionals’ online platform. Their trust was much greater in such platforms than in information found on Google search. Conclusion: A slight loyalty to a certain pharmacy can make it difficult to follow the drug therapy. This adherence to a pharmacy can be increased by the kindness and skills of the pharmacist. Although patients search healthcare information on online interfaces this information do not convince them to order medicinal products via Internet. The high degree of trust in pharmacist or physician managed homepages highlight the importance of these interfaces.
Headache with cranial nerve palsy – a diagnostic and therapeutic challenge in three cases
Authors: Erika Jakab , Gabriella Rokaly , Antal Balla , Orsolya Albert , István Mihály , Attila Szász József , Szabolcs Szatmári
Published: April 2021

Headaches are among the most common complaints in the Neurology Clinic. As a symptom, headache is often a problem not only for the patient, but also for the doctor, as in addition to primary headaches, secondary headaches can have various etiologies. Among the primary headaches, migraine and cluster headaches may present cranial nerve symptoms. The differential diagnosis of secondary headaches can be difficult. We have to include vascular, neoplastic, infectious, inflammatory, toxic, autoimmune causes, where diagnosis requires complex laboratory and/or imaging studies, while the absence of abnormal findings often suggests autoimmune or unknown origin. In our review, we aim to present three cases where the headache was associated with cranial nerve involvement, mainly ophthalmoparesis. The course of the disease was long in all three cases, characterized by symptom-free periods alternating with paroxysmal headaches and diverse cranial nerve palsies. Most frequently, the oculomotor and abducent cranial nerve palsies were observed, but the involvement of trigeminal and facial nerves occurred as well. Based on the symptoms, there was a suspicion of a lesion of the cavernous sinus in all three cases, however, this couldn’t be confirmed by advanced neuroimaging techniques. In addition to symptomatic treatment, steroid therapy improved the complaints, but neurological signs did not disappear in all cases. Furthermore, the signs reappeared after a short time or a different cranial nerve was involved. The lack of a positive diagnosis, the fluctuating course of the disease, and the side effects of steroid therapy demand a long-term follow-up, which is possible only through an appropriate doctor-patient relationship. As guidelines are difficult to elaborate on for such cases, continuous re-evaluation of diagnosis and treatment are required.
The Effect of Deep Brain Stimulation on High Frequency Oscillations in a Chronic Epilepsy Model
Authors: István Mihály , Réka-Barbara Bod , Károly Orbán-Kis , Ádám-József Berki , Tibor Szilágyi
Published: April 2021

Temporal lobe epilepsy (TLE) is a severe neurological disease which is often pharmacoresistant. Deep brain stimulation (DBS) is a novel method for treating epilepsy; however, its mechanism of action is not fully understood. We aimed to study the effect of amygdala DBS in the pilocarpine model of TLE. Status epilepticus was induced by pilocarpine in male Wistar rats, and spontaneous seizures occurred after a latency period. A stimulating electrode was inserted into the left basolateral amygdala and two recording electrodes into the left and right hippocampus. A stimulus package consisted of 0.1 ms-long biphasic pulses applied regularly at 4 Hz for 50 seconds. This package was repeated four times a day, with 5-minute pauses, for 10 days. We also used an age-matched healthy control group of stimulated animals and another one of sham-operated rats. From the hippocampal local field potentials high frequency oscillations (HFOs) were analyzed as these are promising epilepsy biomarkers. HFOs are short oscillatory events between 80-600 Hz which were detected offline using an open-source application of MATLAB, the RIPPLELAB system. We found that the HFO rate was significantly higher in pilocarpine-treated rats compared to the control groups (0.41 ± 0.14 HFO/min vs. 0.006 ± 0.003 in the stimulated control group and no HFO in the sham-operated group). In the pilocarpine group an instantaneous decrease in HFO rate was observed while the stimulation was on (0.44 ± 0.15 HFO/min vs 0.07 ± 0.03 HFO/min, p=0.017). The effect was short-lived because the frequency of HFOs did not change significantly in the time windows between stimulus packages or during the ten-day stimulation period.

The difference of HFO rates between epileptic and control groups could be used in the electrographic assessment of epilepsy. The decreased frequency of HFOs during stimulation may be useful to study the efficacy of DBS.
Determination of enantiomeric purity of esomeprazole by capillary electrophoresis
Authors: Attila Papp Lajos , Gabriel Hancu , Hajnal Kelemen , Árpád Gyéresi
Published: April 2021

Proton pump inhibitors are the most effective agents used in gastric hyper-acidity-related disorders. Omeprazole is a benzimidazole-derivative compound with an asymmetric sulphur in its structure, which generates its chiral character.

Esomeprazole (S-omeprazole) was the first proton pump inhibitor introduced as an enantiomerically pure compound in therapy, after the successful chiral switch of the racemic omeprazole.

This work is aimed at performing a complementary study to an already published chiral separation method of omeprazole. As preliminary analysis, the electrophoretic behavior of omeprazole enantiomers and the possible mechanism of the chiral resolution was studied using different background electrolytes containing different β-cyclodextrin derivatives, as chiral selectors. The robustness of the chiral separation method was tested by applying a Plackett-Burman design. The method was validated according to current ICH guidelines and proved to be reliable, linear, precise and accurate for the determination of 0.2% R-omeprazole as chiral impurity in esomeprazole samples. The validated method was successfully used for the analysis of esomeprazole-containing gastro-resistant tablets.

According to our results, valuable information on the mechanism of chiral separation of omeprazole was gained and the application area of the previously developed method was successfully enlarged. The presented rapid and cost-effective capillary electrophoresis method proved to be suitable for the determination of enantiomeric purity of esomeprazole from pharmaceutical preparations and could represent an alternative for the available compendial methods.
Sediment thickness in the Bay of Bengal and Andaman Sea compared with topography and geophysical settings by GMT
Authors: Lemenkova Polina
Published: April 2021

The study presents an analysis of the sediment thickness compared with bathymetric and geophysical settings in the Bay of Bengal and Andaman Sea, Indian Ocean. It uses a combination of the high-resolution data: topographic GEBCO, satellite and marine gravity anomalies, EGM2008 geoid and GlobSed to visualize the correlation between relief, gravity and trends in continent-ocean sediment transport. The results include thematic maps and 3D model showing increased sediment thickness in the Bengal Fan (8,0 to 8,2 km) in NE direction with maximum in Ganges Fan (16,2 km), and southward decrease in the Andaman Sea from Irrawaddy river mouth (6-7 km) to the Strait of Malacca (1-2 km). All maps and 3D model have been plotted by Generic Mapping Tools (GMT) cartographic scripting toolset version 6.0.0.
Sizing and Simulation for Optimization of a Water Pumping Installation Using Fuzzy Logic
Authors: Toma Petrică Daniel
Published: April 2021

In this article we present the way how to create a program in the Scilab-Xcos environment with which it can be dimensioned, mathematically modeled and simulated a water pumping installation.

The mathematical equations implemented in the program with which the dimensioning and simulation are done are presented.

Fuzzy logic was used to generate the pump characteristics.
Flood Risk Assessment Based on Flood Hazard and Vulnerability Indexes
Authors: Buta Constantin , Mihai Geanina , Stănescu Madalina
Published: April 2021

Within this paper, a methodology for assessing the flood risk was developed by extracting the essential factors that favor the generation of flood risk. These factors, that had a sufficient number of data for a proper comparative analysis, are: potentially affected population based on population density, total agricultural area, total built-up area and the historical maximum amount of precipitation recorded in 24 hours. The flood risk assessment is presented in the form of indices calculation for all these factors and maps generated which representing the results of the calculation of the above-mentioned factors and the results of the flood risk index calculation.

Urban floods have particularities that must be presented in detail to understand the flood phenomenon, which is why this paper takes into consideration these areas. In order to determine the probability of urban floods, all disturbing factors that may affect the urban area must be taken into account.

The method presented in this paper can be used in sectoral planning activities and integrated planning studies, and for damage assessment.
Bioethical Themes in University Teaching of Future Educators and Teachers Original scientific article
Authors: Mlinarević Vesnica , Huljev Antonija , Zec Ružica Tokić
Published: April 2021

Bioethics, as a newer scientific discipline answers questions about the life of the contemporary man in an interdisciplinary way, and we use education to express what kind of a society and what kind of a man we want. Values on which the educational system in the Republic of Croatia is based are viewed as a new possibility to develop the Croatian national, cultural, and spiritual identity within complex globalization processes. In the era of globalization, informational and technological improvement, one of the hardest efforts of the modern age is the upbringing of children in the changed circumstances, which consequently reflects on the style of education and the conditions in which education is conducted. The aims of the upbringing focus the educational practice and the pedagogical action, while the responsibility and the complex task is bestowed upon educators/teachers. The importance of initial education of educators/teachers is irrefutable today. To be an educator is a vocation/profession with specific professional standards and ethical rules of the teaching profession, inspired by the values of social inclusion and the needs of the child/pupil. This paper deals with a comparative analysis of study programmes and learning outcomes in the Integrated Undergraduate and Graduate University Teacher Study, as well as University Study of Early and Preschool Education at the Faculty of Education in Osijek, focused on the (bio)ethics, education and ethics of the teacher’s calling. Students, future preschool/primary school teachers during the study need to be made aware of the sensitivity in ethical decision-making in the future profession, as well as solving the problems which influence on building the character, because ethics and bioethics need to fulfil important social and individual aspects of education.
Picture Books for Children of Early School Age for the Purpose of Environmental Education
Authors: Majdenić Valentina , Saratlija Ivka
Published: April 2021

Environmental education is gaining more and more significance, not only because of the wasting of natural sources but also because of the polluting of the environment. The aim of environmental education is not only the knowledge or a line of facts which a child should learn about the environment, but also building proper attitudes and a positive relation towards the environment. It’s important to practice literature to develop an ecological conscience. It’s possible to accomplish a connection of literature and education on three levels: on the basic, on some higher and on the highest one. On the basic level, picture books and illustrated books for children process ecological themes more from the cognitive and less (or almost not at all) from the poetical point of view appeared. Exactly because of that, they are called a cognition type of picture books or illustrated books for children. The aim of this paper is to describe picture books with ecological themes and also to analyse functions of each picture book taken in the account. Six books were selected: Sunčica upoznaje činčilu (eng. Sunčica meets chinchilla), Brdo na kraju grada (eng. Hill at the end of town), Priroda priča... (eng. Nature talks), Nauči poštivati prirodu uz kravicu Šaricu (eng. Learn to respect nature with Šarica the cow), Zatvori vodu! (eng. Shut the water off!) and Zraka trebam, hitno! (eng. I need air, now!).
The feasibility of a student-centred approach to the presentation of vicarious experience information within online learning
Authors: Wilde Natalie , Hsu Anne
Published: April 2021

Previous researchers have emphasised the need for more student-centred approaches to online learning. This study presents and assesses the feasibility of a tailoring system, which adapts vicarious experience information to best benefit the learners’ self-efficacy (SE), based upon the model–observer similarity hypothesis. This hypothesis states that the benefit of vicarious experience information is positively correlated with the levels of similarity between the model within the information and the individual observing it.

Participants took part in online learning, which included a set task. Before completing the set task, they were shown vicarious experience information in the form of a fictional testimonial from a previous individual who had completed the task. Participants were exposed to one of two types of testimonials: a testimonial chosen by the tailoring system to ensure high levels of model–observer similarity, or a generic testimonial.

Overall, the results found that using a tailoring system to ensure high levels of model–observer similarity did result in the testimonial information having a more positive effect on an individual’s task-specific SE when compared to generic testimonial information. The results support the feasibility of tailoring within online learning to increase the effectiveness of testimonial information in increasing an individual’s efficacy beliefs.
History Re-Written: Misconceptions of U.S. Trade and Industrial Policy and the Influence of Neoliberalism
Authors: Taylor Travis K. , Montera Amanda
Published: April 2021

A disparity exists between mainstream perception and reality with regard to American economic history. There is widespread belief among the public, media, and even some scholars that the U.S. amassed its wealth and prosperity from the adoption of exclusively free-market principles from the onset of the union. This is far from reality. Since 1980, the U.S. government has adopted policies that largely support the free-market ideology and can be classified as neoliberal. However, As Chang (2002) and Cohen and DeLong (2016) have shown, during the early stages of economic development and critical junctures whilst a middle-income country, the U.S. record is one of active government intervention in targeted industries, the creation of important institutions to complement free-market competition, and the widespread use of trade protection in support of infant industries. This misconception has significant ramifications for present-day developing countries, which are routinely advised to adopt neoliberal policies with insufficient regard for the idiosyncratic stage of economic development. This paper documents the misconceptions by examining the theoretical basis and historical record of U.S. industrial and trade policy. We detail how this misconception became widespread and ultimately entered policymaking by analyzing two contributing factors: the rise of neoliberalism, and the standard economics curriculum.
Characterisation of the Wear of the Roller Cone Drill Bit Caused by Improperly Chosen Drilling Regime
Authors: Šporin Jurij
Published: April 2021

The rapid drop in the penetration rate or failure of the drill bit during the drilling process delays the drilling process. In our investigation, the ‘in situ’ drilling parameters were monitored during the drilling process along with the roller cone drill bit, which is suitable for drilling in soft rock formations (IADC 136). The drill bit was thoroughly examined to determine its damage and wear occurred during drilling along with decreasing penetration rate. The modern and standardised investigation methods were used to analyse the rock materials and the micro- and macro-structure of the materials of the roller cone bit. The analyses were performed by means of optical and electron microscopes, simultaneous thermal analysis of the steel materials, analysis of the chemical composition of the materials of the drill bit and determination of the geomechanical parameters of the drilled rock. The resulting wear, localised fractures and cracks were quantitatively and qualitatively defined and the parameters were correlated to the drilling regime and the rock material. The results of our investigation of the material of the roller cone bit can serve as a good basis for the development of new steel alloys that can withstand higher temperatures and allow effective drilling without structural changes of the steel material.
A Comparative Study of Dynamic Load Response of High Temperature PEM Fuel Cells
Authors: Tomas Martin , Novotny Pavel , Gholami Fatemeh , Tucek Ondrej , Marsik Frantisek
Published: April 2021

The high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) based on the polybenzimidazole (PBI) membrane doped with phosphoric acid (H3PO4) presents a promising route in the development of fuel cell technology. The higher operating temperature of 160–200 °C results in an increased tolerance of the platinum catalyst to the carbon monoxide, an improved electrode kinetics, a higher-grade heat produced by the fuel cell, and a simplified water management due to the absence of liquid water in the system. In this study, the accelerated stress test protocol (AST) corresponding to the Driving Duty Cycle was used to characterize two sets of commercial MEAs, by Danish Power Systems Ltd. and FuMA-tech GmbH, respectively. Performance characteristics prior to and after the AST procedure were measured. The changes in the resistivity of the MEA were examined by electrochemical impedance spectroscopy (EIS). The EIS data were analysed and interpreted by a suitable equivalent circuit that consisted of a resistor and the Voigt’s structure in series with constant phase elements. Conducted experiments and their analysis showed suitability of the HT-PEMFC technology in applications where dynamical load of the cell is expected. Moreover, the lower number of AST cycles did not seriously affect the cell performance. As expected, with increasing number of AST cycles, decrease in the cell performance was observed. In general, presented comparative study is expected to provide an extension of existing data for present and future development of diagnostic in the field of HT-PEMFC.
Effect of Diesel Fuel Blend on Flame and Emission Characteristics of Used Engine Oil as Heating Fuel Using Swirl Waste Oil Burner
Authors: Luka Bobby Shekarau , Ejilah Robinson Ichakpa , Owhor Sampson Chisa , Japhet Joseph Ajiya , Ibrahim Tanimu Kogi , Udom Paul Okon
Published: April 2021

Highly viscous fuels present combustion challenges due to poor atomization and consequent inefficient air-fuel mixture, however, due to the demand for cheap heating fuels; burner design and fuel properties are continually optimized to enhance their combustion and emission performance. In this study, used engine oil was drained from the sump of a compression ignition engine; the oil was pre-treated to remove particulate matter, water and ferromagnetic materials. The oil samples were then blended with diesel fuel at different volumetric proportions and were characterized according to ASTM standard. The fuel samples were then combusted using atomizing swirl waste oil burner; flame temperature and flame size were measured using infrared thermometer and direct photography respectively. The burner was then mounted to a combustion chamber and the emission gases and flue gas temperatures were measured using a flue gas analyser and digital thermometer respectively. It was revealed that increasing diesel fuel blend decreases the density and viscosity of the fuel samples. All the blended fuel samples were found to form a homogenous mixture and generated flame temperature higher than the unblended oil sample (B0), B20 generated the highest flame temperature of 1400 °C with flame size of 340 × 210 mm and the lowest carbon monoxide (CO) emission of 0.49 %, unburned hydrocarbon (HC) of 249 ppm and the highest carbon dioxide (CO2) of 12.87 % levels. In view of this, diesel fuel can be used as a good blending candidate to used engine oil to improve flame temperature and decrease emission levels in swirl waste oil burners.
Retrofitting Rural Dwellings in Delta Region to Enhance Climate Change Mitigation in Egypt
Authors: Abouaiana Ahmed
Published: April 2021

The current rural dwelling pattern in the Delta in Egypt consumes much energy to achieve dwellers’ thermal comfort, increasing greenhouse gas emissions contributing to climate change threatening the region’s coastal parts. Therefore, this study highlights the potential of retrofitting the existing rural house utilizing pervasive construction technologies in diminishing energy consumption and carbon dioxide emissions as a climate change mitigation strategy. The current modern rural house and the construction typologies were characterized. This study selected a typical modern rural dwelling located in Al-Gharbia Governorate in the Delta region. The suggested retrofitting strategies were applied to the external building envelope. The impact on the annual energy consumption of cooling and heating loads was evaluated using an Energy Performance Assessment Tool (Design Builder). An optimal envelope configuration was suggested, then an economic assessment and an investigation to the local acceptance were provided. The results showed that using the commonly used construction techniques as a retrofitting strategy can plummet the energy consumption and CO2 emissions by one-third worthy of mentioning that the locals have shown a lack of interest in the investment in retrofitting their buildings as well as the economic model showed that the investment is not profitable. Further studies can be made by the author considering investigating different building typologies and engaging other stakeholders.
“I wanted to see how to make money there too”: Mobility strategies of Romanian seasonal workers in the agricultural sector abroad
Authors: Voivozeanu Alexandra
Published: April 2021

Drawing on interviews with key informants and seasonal workers in Germany, Spain, Italy, Austria and the UK, and on non-participant ethnographies, this paper demonstrates that, despite various limitations associated with work in the agriculture sector, migrants strategically choose the times and destinations of their trips abroad, taking into account a variety of factors, including family commitments, economic goals at the origin, wages and working conditions, health issues and welfare opportunities. The findings illustrate that, depending on their commitments and economic objectives, Romanians who work in agriculture develop different mobility practices. While some work abroad only occasionally, when they need to supplement their home-country income, others engage in circular migration or extend the periods of time they spend abroad. In host countries, most workers try out various jobs and typically get involved in repeated migration once they have found a suitable arrangement. Some workers combine seasonal work in one or more countries of destination, over the course of the same year, with the aim of securing income for longer periods of time, while others opt for long-term migration or move into sectors that offer better opportunities.