bluuebunny/crossref_metadata_2025 huggingface dataset:
Use of artificial intelligence technologies for building individual educational trajectories of students
Authors: Kupriyanov Roman B. , Agranat Dmitry L. , Suleymanov Ruslan S.
Published: April 2021

Problem and goal. Developed and tested solutions for building individual educational trajectories of students, focused on improving the educational process by forming a personalized set of recommendations from the optional disciplines. Methodology. Data mining and machine learning methods were used to process both numeric and textual data. The approaches based on collaborative and content filtering to generate recommendations for students were also used. Results. Testing of the developed system was carried out in the context of several periods of elective courses selection, in which 4,769 first- and second-year students took part. A set of recommendations was automatically generated for each student, and then the quality of the recommendations was evaluated based on the percentage of students who used these recommendations. According to the results of testing, the recommendations were used by 1,976 students, which was 41.43% of the total number of participants. Conclusion. In the study, a recommendation system was developed that performs automatic ranking of subjects of choice and forms a personalized set of recommendations for each student based on their interests for building individual educational trajectories.
Development of information culture of students when teaching equations of mathematical physics in the conditions of informatization of education
Authors: Kornilov Viktor S. , Rusinov Alexey S.
Published: April 2021

Problem and goal. In modern conditions, specialists in various subject areas who have an information culture and are able to solve complex professional problems using modern information and communication technologies are in demand. Currently, specialists in the field of applied mathematics are required, which plays an important role in the development of human civilization. Therefore, in the process of teaching various academic disciplines of applied mathematics at the university, including the discipline Equations of mathematical physics, attention should be paid to the development of students information culture. Methodology. When teaching students the discipline Equations of mathematical physics, it is extremely important that the teacher knows not only the content of teaching this discipline of applied mathematics, but also has practical experience in solving equations of mathematical physics by computer means. Such qualities of the teacher will allow him to successfully conduct training sessions in the conditions of informatization of teaching mentioned discipline. At the same time, it ought to be clearly understood that the use of computer technologies in teaching the discipline Equations of mathematical physics must be correct. The necessity to develop and implement in practice a variety of methodological approaches that allow students to develop an information culture in training sessions on that discipline is obvious. Results. The use of advanced pedagogical technologies in training sessions on the discipline Equations of mathematical physics, where computer technologies are used, will allow students to develop an information culture. Conclusion. Computer technologies that students use in the process of solving educational problems require them to have certain skills and abilities to identify their broad capabilities. Students are aware of the role of computer technologies in conducting applied scientific research, understand the role of computer modeling methodology and computational experiment in studying the world around them.
PERUBAHAN ANGGARAN BELANJA SATUAN KERJA PERANGKAT DAERAH
Authors: Syukriy Abdullah Syukriy Abdullah , Yulinda Kusyanti Yulinda Kusyanti , Nadirsyah Nadirsyah
Published: April 2021

Penelitian ini bertujuan untuk menguji pengaruh sisa anggaran, perubahan anggaran sebelumnya, dan besaran anggaran terhadap perubahan anggaran belanja SKPD. Penelitian ini menggunakan model regresi linier berganda dengan data dari 31 SKPD di Kabupaten Aceh Besar sebagai sampel selama periode tahun 2010-2014. Hasil pengujian menemukan bahwa perubahan anggaran tahun lalu berpengaruh positif terhadap perubahan anggaran belanja SKPD, namunsisa anggaran tahun sebelumnya dan besaran anggaran tidak berpengaruh terhadap perubahan anggaran belanja SKPD
PENGARUH KESADARAN PERPAJAKAN, SIKAP RASIONAL, DAN SANKSI DENDA TERHADAP KEPATUHAN WAJIB PAJAK
Authors: Nugroho Vidyarto , Oktrina Livia , Soekianto Tonni
Published: April 2021

Tujuan dilakukannya penelitian ini yaitu untuk menguji secara empiris pengaruh Kesadaran Perpajakan, Sikap Rasional, dan Sanksi Denda terhadap kepatuhan wajib pajak di Kota Payakumbuh. Penelitian ini menggunakan 100 sampel seseorang yang memiliki penghasilan tetap dan berdomisili di Kota Payakumbuh yang diperoleh dengan metode nonprobability sampling dengan teknik purposive sampling. Data bersumber dari data primer yang berupa kuesioner dan diolah menggunakan teknik analisis regresi linear berganda dengan program SPSS versi 23. Hasil penelitian menunjukkan bahwa Kesadaran Perpajakan dan Sikap Rasional memiliki pengaruh positif signifikan terhadap kepatuhan wajib pajak, sementara Sanksi Denda memiliki pengaruh negatif signifikan terhadap kepatuhan wajib pajak.
DETERMINANT JUMLAH PENDUDUK TERHADAP TINGKAT KEMISKINAN DI PROVINSI ACEH
Authors: . Murtala
Published: April 2021

Penelitian ini bertujuan untuk untuk mengetahui pengaruhjumlah penduduk terhadap tingkat kemiskinan di Provinsi Aceh. Data yang digunakan dalam penelitian adalah data time series periode 1980-2014 yang bersumber dari Badan Pusat Statistik (BPS) Indonesia. Model yang digunakan adalah analisis regresi linear sederhana. Hasil penelitian menunjukkan bahwa tingkat kemiskinan di Provinsi Aceh dapat dijelaskan oleh variabel jumlah penduduk sebesar 27,3 persen dan sisanya sebesar 72,7 persen dipengaruhi oleh: investasi, pertumbuhan ekonomi, sumber daya manusia, dan inflasi. Jumlah penduduk secara parsial berpengaruh negatif dan signifikan terhadap tingkat kemiskinan di Provinsi Aceh. Jumlah penduduk merupakan variabel yang mempengaruhi tingkat kemiskinan di Provinsi Aceh. Oleh karenanya memperlambat pertumbuhan penduduk atau meningkatkan kesejahteraan masyarakat seiring dengan meningkatnya penduduk di Provinsi Aceh menjadi salah satualternatif dalam penurunan tingkat kemiskinan.
DETERMINANT JUMLAH PENDUDUK TERHADAP TINGKAT KEMISKINAN DI PROVINSI ACEH
Authors: Murtala Murtala
Published: April 2021

Penelitian ini bertujuan untuk untuk mengetahui pengaruhjumlah penduduk terhadap tingkatkemiskinan di Provinsi Aceh. Data yang digunakan dalam penelitian adalah data time seriesperiode 1980-2014 yang bersumber dari Badan Pusat Statistik (BPS) Indonesia. Model yangdigunakan adalah analisis regresi linear sederhana. Hasil penelitian menunjukkan bahwa tingkatkemiskinan di Provinsi Aceh dapat dijelaskan oleh variabel jumlah penduduk sebesar 27,3persen dan sisanya sebesar 72,7 persen dipengaruhi oleh: investasi, pertumbuhan ekonomi,sumber daya manusia, dan inflasi. Jumlah penduduk secara parsial berpengaruh negatif dansignifikan terhadap tingkat kemiskinan di Provinsi Aceh. Jumlah penduduk merupakan variabelyang mempengaruhi tingkat kemiskinan di Provinsi Aceh. Oleh karenanya memperlambatpertumbuhan penduduk atau meningkatkan kesejahteraan masyarakat seiring denganmeningkatnya penduduk di Provinsi Aceh menjadi salah satualternatif dalam penurunan tingkatkemiskinan.
ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI PERTUMBUHAN JUMLAH PENDUDUK DI KABUPATEN ACEH TIMUR
Authors: Murtala Murtala
Published: April 2021

Tujuan penelitian ini adalah untuk mengetahui pengaruh tingkat kelahiran, kematian, migrasi dari luar dan migrasi dari dalam terhadap pertumbuhan jumlah penduduk di Kabupaten Aceh Timur. Data yang digunakan dalam penelitian ini bersumber dari BPS Aceh, BAPPEDA, dan Kantor Bupati serta berbagai literatur dan terbitan berkala lainnya yang ada kaitan dengan masalah penelitian ini. Jenis data yang digunakan adalah data sekunder selama periode 1995-2004 dengan peralatan regresi linear berganda. Hasil penelitian menunjukkan bahwa semua variabel bebas dalam penelitian ini ternyata berpengaruh signifikan terhadap pertumbuhan penduduk di Kabupataen Aceh Timur. Diharapkan pertumbuhan jumlah penduduk di Aceh Timur dimasa yang akan datang terus meningkat dengan harapan tingkat kematian semakin berkurang dan perbaikan gizi semakin baik.AbstractThe purpose of this study was to determine the effect of birth rate, mortality, external migration and inward migration to population growth in East Aceh district. The data used in this research are sourced from BPS Aceh, BAPEDA, and Bupati's Office as well as various other literature and periodical publications related to this research problem. The type of data used is secondary data during the period 1995-2004 with multiple linear regression equipment. The results showed that all independent variables in this study turned out to have a significant effect on population growth in Kabupataen Aceh Timur. It is expected that population growth in East Aceh in the future will continue to increase with the expectation of decreasing death rate and better nutrition improvement.Keywords: birth rate, death, migration from outside, migration from within, population
Sutureless repair and deep sedation for a blow-out type post-infarction left ventricular free wall rupture
Authors: Kusadokoro Sho , Shiraishi Manabu , Hori Daijiro , Yamaguchi Atsushi
Published: April 2021

A 71-year-old woman who was resuscitated from cardiac arrest after
pericardial drainage, was admitted to our hospital. Enhanced computed
tomography demonstrated pericardial effusion due to rupture of posterior
ventricular myocardium. She underwent emergent surgical repair. A 20-mm
tear in the extensively necrotic left ventricular posterior wall and
active hemorrhage were identified. Sutureless repair using three sheets
of TachoSil (CSL Behring, Tokyo, Japan) and fibrin glue was performed.
To reduce ventricular pressure to avoid re-rupture and formation of
ventricular aneurysm, deep sedation was followed in the intensive care
unit for 2 weeks. The patient returned to her normal daily life and is
progressing well for more than 5 months after the surgery.
Dynamic thiol/disulphide balance in patients undergoing hypotensive anesthesia in elective septoplasties
Authors: Kazancioglu Leyla , Batcik Sule , Arpa Medeni , Erdivanli Basar , Coskun Zerrin Ozergin , Erdivanli Ozlem Celebi , Bahceci Ilkay , Kazdal Hizir , Erel Ozcan , Neselioglu Salim
Published: April 2021

Objective: We aimed to investigate the effects of hypotensive anesthesia
on oxidative stress with serum thiol/disulfide balance in patients
undergoing elective septoplasty procedures under general anesthesia.
Methods: Seventy-two patients between the ages of 18-60, with a physical
condition I –II, according to the American Society of
Anesthesiologists, were included in this prospective observational
study. Septoplasty was chosen for standard surgical stress. According to
the maintenance of anesthesia, patients were divided into the groups as
Hypotensive Anesthesia (n = 40) and Normotensive Anesthesia (n = 32).
Serum thiol/disulfide levels were measured by the method developed by
Erel & Neşelioğlu. Results: The native thiol and total thiol values of
both groups measured at the 60th minute intraoperatively were
significantly lower than the preoperative values (both p <
0.01). Intraoperatively, at the 60th minute, there was no significant
difference in terms of post-native thiol and post-total thiol levels
between hypotensive and normotensive anesthesia groups (p = 0.68, and p
= 0.81, respectively). Age > 40 years and female gender
were found to have a significant effect on dynamic oxidative stress (p =
0.002, and p = 0.001, respectively). Conclusion: This pilot study has
found that hypotensive anesthesia had no adverse effect on dynamic
thiol/disulfide balance in elective surgeries.
THE RELATIONSHIP BETWEEN FRONTAL QRS-T ANGLE AND THE SEVERITY OF RECENTLY DIAGNOSED CHRONIC OBSTRUCTIVE PULMONARY DISEASE
Authors: Hocanlı Iclal , Tanrıverdi zulkif , kabak mehmet , gungoren fatıh , Tascanov Mustafa Begenc
Published: April 2021

Background: Chronic Obstructive Pulmonary Disease (COPD) which is
characterized by persistent airflow restriction and respiratory
symptoms. Studies demonstrated that cardiac arrhythmias, cardiovascular
mortality and cardiac death increased in these patients due to altered
myocardial repolarization. Frontal QRS-T angle is a novel marker of
myocardial depolarization and repolarization heterogeneity. In this
study, we aimed to investigate the relationship between frontal QRS-T
angle and COPD severity in patients with newly diagnosed COPD. Methods:
A total of 104 newly diagnosed COPD patients without any significant
comorbidities were included in this study. Patients were divided into
two groups according to GOLD stage as follows: patients with mild and
moderate COPD (group I) and severe and very severe COPD (group II).
Frontal QRS-T angle was calculated from the automatic report of the
electrocardiography device . Results: Frontal QRS-T angle was
significantly higher in group II patients compared to in group I
patients (43.0 [25.5-60.0] vs. 20.0 [12.0-32.0], P <
0.001). The best cut-off value of frontal QRS-T angle for predicting
severe-very severe COPD was ≥ 34.5°. Correlation analysis showed that
frontal QRS-T angle was negatively correlated with FEV1/FVC (r =
–0.524, P < 0.001) and MEF25-75 (r = –0.453, P <
0.001). In linear regression analysis, It was found that MEF25-75 (β:
–0.593, P = 0.006) was the only independent predictor of the frontal
QRS-T angle. Conclusions: Frontal QRS-T angle, an easily obtainable
marker form surface electrocardiography. In this study, we have shown
for the first time that frontal QRS-T angle was significantly increased
in patients with severe and very severe COPD.
N-enriched GO Adsorbent Series for Selective Adsorption of CO2: Characterization, Equilibrium, and Thermodynamic Studies
Authors: Najafi Mahsa , Hosseini Yasamin , Khalili Soodabeh , Peyravi Majid , Jahanshahi Mohsen
Published: April 2021

In this study a series of GO-based adsorbents were assembled via
impregnation method using N-resources: 3-aminopropyl-triethoxysilane
(APTS) as primary amio-silane, Piperazine (PIP) as secondary cyclic
diamine, and ethanolamine (EA) as primary amine. The influence of amine
type, adsorption temperature and pressure were undertaken to obtain the
best CO2 adsorption performance. The characterizing techniques including
FTIR, SEM, TGA, BET, BJH, and MP confirmed well impregnation of amine
functionalities to the GO framework and high thermal stability of
adsorbents. GO/APTS showed the maximum CO2 uptake (43.114 mmol/g)
predicted by the Sips isotherm model and the highest CO2 ¬(15% V,
balanced N2) selectivity (33.7 %) estimated by the ideal adsorbed
solution theory. The experimental adsorption capacity of GO/APTS is 2.3
times higher than pristine GO. This behavior highlights the role of
electron-donor amine and methyl groups and high molecular weight of APTS
as well as high interfacial area of GO/APTS in CO2 capture.
Preparation of Komagataeibacter xylinus inoculum for bacterial cellulose biosynthesis using magnetically assisted external-loop airlift bioreactor
Authors: Żywicka Anna , Ciecholewska-Juśko Daria , Drozd Radosław , Rakoczy Rafał , Konopacki Maciej , Kordas Marian , Junka Adam , Migdał Paweł , Fijałkowski Karol
Published: April 2021

The aim of this study was to demonstrate the applicability of a novel
magnetically-assisted external-loop airlift bioreactor (EL-ALB),
equipped with RMF generators for the preparation of Komagataeibacter
xylinus inoculum during three-cycle repeated fed-batch cultures, further
used for bacterial cellulose (BC) production. The fermentation carried
out in the RMF-assisted EL-ALB allowed to obtain an inoculum of more
than 200x higher cellular density compared to classical methods of
inoculum preparation. The inoculum obtained in the RMF-assisted EL-ALB
was characterized by a high and stable metabolic activity during
repeated batch fermentation process. The application of the RMF-assisted
EL-ALB for K. xylinus inoculum production did not induce the formation
of cellulose-deficient mutants. It was also confirmed that the ability
of K. xylinus to produce BC was at the same level (7.26 g/L of dry
mass), regardless of inoculum age. Additionally, the BC obtained from
the inoculum produced in the RMF-assisted EL-ALB was characterized by
reproducible mechanical strength, nanostructure and total crystallinity
index. The results obtained in this study may find multiple applications
in any biotechnological processes requiring a high-quality bacterial
inoculum.
Targeted treatment in viral associated inflammatory cardiomyopathy
Authors: Amin Ahmad , Taghavi Sepideh , Chenaghlou Maryam , Zare Elahe , Kamali Monireh , Naderi Nasim
Published: April 2021

Though generally self-limited, viral myocarditis can lead to acute
cardiac failure or chronic dilated cardiomyopathy. We describe three
cases of human herpes virus 6 (HHV6) associated -myocarditis
unresponsive to conventional therapies, with detection of HHV-6
evidences and initiation of antiviral treatment, we observed significant
improvement in clinical status of patients.
SINTESIS DAN ANALISIS KANDUNGAN MINERAL DAN KARAKTERISTIK SIFAT LISTRIK NANOPARTIKEL PASIR BESI PANTAI TELINDUNG KABUPATEN LOMBOK TIMUR
Authors: Asri Laelatul , Didik Lalu A. , Bahtiar Bahtiar
Published: April 2021

This study aims to determine the mineral content as well as the characteristics of the electrical properties of the iron sand nanoparticle samples of the Telindung beach. Synthesis of iron sand nanoparticles can be done by sharing one method, namely the coprecipitation method. In the coprecipitation process, researchers used HCl and NH4OH solutions to make a sample of nano-sized iron sand (nanoparticles) of 5 samples with different sampling distances of 3 meters, 6 meters, 9 meters, 12 meters, and 5 meters. Each finished sample is then analyzed for its mineral content using AAS. The results shows that the higher the sampling distance, the higher the mineral content, namely the total Fe in the sample of iron sand nanoparticles (8.28%, 8.79%, 8.85%, 9.07% and 9.74%). Characteristics of electrical properties namely resistivity using 4 point probes with a series of power supply devices and multimeters by making 1 sample 5 times the measurement so that the value of resistivity (8.3 x 104 ,m, 9.1 x 104 Î©m, 9.6 x 104 Î©m, 10 Î©m, 3 x 104 Î©m, 11.3 x 104 Î©m), for dielectricity using a plate parallel to the LCR meter, one sample of 10 times the measurement so as to obtain the value of the dielectric constant (6.4 x 104 F, 7.9 x 104 F, 9 , 8 x 104 F, 11.6 x 104 F and 13.1 x 104). So it can be said that the higher the value of minerl candlengan that is the total Fe, the higher the value of the characteristic electrical properties are resistivity and dielectricity.
Drivers of agricultural productivity: Evidence from transforming economies
Authors: Osinowo Olatokunbo Hammed , Tolorunju Esther Toluwatope , Osinowo Iyabosola Mary
Published: April 2021

This study empirically investigates the drivers of agricultural productivity in transforming economy. The study used a 35-year period (1980–2014) panel data sourced from World Development Indicators, Penn World Table, United States Department of Agriculture and Statistics on Public Expenditure for Economic Development. Data used for the study include Agricultural Productivity (AP), Real Gross Domestic Product (GDP), Government Agricultural Expenditure (EXP), Agricultural Trade Barrier (ATB), Consumer Price Index (CPI), Farm Machinery (MACH), Fertiliser (FERT), Human Capital (HCAP) and Irrigation (IRRG). Data were analysed using Impulse Response Function, Levin-Lin-Chu unit root test, Johansen-Fisher Panel Cointegration test and Panel Least Squares regression technique. Impulse Response Function revealed that ln (GDP)reacted negatively to a shock from ln (Agricultural Productivity). Levin-Lin-Chu unit root test revealed that the variables were stationary either at level or at first difference. The result of the Johansen-Fisher panel cointegration test showed that for every case at 5 percent level of significance, we reject null hypothesis of no cointegration. Panel Least Squares revealed that Agricultural Trade Barrier (α = 0.0531, p < 0.05), Human Capital (α = 1.2409, p < 0.01) and Irrigation (α = 0.0771, p < 0.01) increased Agricultural Productivity. However, Fertilizer (α = −0.0730, p < 0.01) decreased Agricultural Productivity. This study therefore concluded that Agricultural Productivity will grow in transforming economy with trade restriction on imported agricultural tradable commodities, increased investment in human capital and expansion in irrigation application. The study therefore recommends measures that will protect domestic agriculture, capacity building of the farmers and improved irrigation infrastructure that will enhance small scale farmers for all-season cropping.
Intervention Strategies in Foreign Exchange Market
Authors: Martin Vesna
Published: April 2021

The goal of the paper is to present the intervention strategies used by central banks in order to influence the value of the domestic currency, transparency versus discretion when it comes to publishing data about FX intervention and the cost and effectiveness of intervention. It is rarely that nowadays countries allow for an exchange rate to be formed on the market basis through the effects of supply and demand for foreign exchange on the foreign exchange market. The central bank buys or sells a foreign currency in the foreign exchange market in order to increase or decrease the value of its national currency in comparison to the foreign currency. The reasons for the intervention are the reduction of short-term oscillations of the exchange rate, the impact at the level of foreign exchange reserves, as well as the maintaining the price and financial stability as the ultimate goal of most central banks. The paper will present intervention strategies on foreign exchange market, which involves the implementation of interventions in the market of options, forward, foreign currency repo and foreign currency swaps. Then, on the spot market, interventions using an auction, as well as the application of foreign currency indexed certificates.
Repeated Sprint Ability in Elite Basketball Players: The Effects of 10 × 30 m Vs. 20 × 15 m Exercise Protocols on Physiological Variables and Sprint Performance
Authors: Figueira Bruno , Gonçalves Bruno , Abade Eduardo , Paulauskas Rūtenis , Masiulis Nerijus , Kamarauskas Paulius , Sampaio Jaime
Published: April 2021

Team sports players are required to perform repeated bouts of short-term high-intensity actions during the games. The present study aimed to examine the effects of a novel repeated sprint ability protocol (20×15 m) and compare it with the impact of a more traditional repeated sprint ability protocol (10×30 m). Twelve male elite Lithuanian basketball players (age 21.0 ± 2.0 y, body height 1.90 ± 0,07 m, body mass 86.2 ± 5.8 kg and training experience 12.0 ± 1.9 y) competing in the Lithuanian National Basketball Championship participated in this study. Participants completed three bouts of each repeated sprint protocol interspersed with 5 minutes of recovery. Results showed that the 20×15 m protocol caused a significant decrease in total sprint time (most likely; mean changes (%) with ± 90% of confidence limits, -9.4%; ± 0.7%) and a large decrease in blood lactate (most likely, -39.2%; ±12.8%) compared to the 10×30 m protocol. Despite small differences, the fatigue index presented a similar trend (possibly decrease, -23.7%; ± 38.8%). The exercise heart rate showed a very similar trend with trivial differences between the two protocols. The 20×15 m protocol presented a lower heart rate during recovery with small magnitude. Overall, the present study showed that the 20×15 m protocol seemed to be more representative of the specific basketball demands. Coaches should be aware that RSA training during the in-season may be an adequate stimulus to improve high-intensity runs and muscle power in high-level players.
The Relationship Between the Perceived Movement Quality and the Kinematic Pattern of Complex Skills in Gymnastics
Authors: Mack Melanie , Schmidt Marcel , Heinen Thomas
Published: April 2021

The study aimed to investigate the relationship between the perceived movement quality of a gymnastics skill and its kinematic pattern, as well as the influence of expertise. Thirty participants with different levels of gymnastics expertise (n = 10 visual experts, n = 10 motor experts and n = 10 novices) were recruited for the study. They were instructed to compare the movement quality of eleven video sequences, showing different handstand - back handspring performances. To extract the kinematics, the performances were digitized. By means of an ongoing cluster analysis, the kinematic pattern as well as the pattern of the perceived movement quality of the skills were determined for each experimental group. The results of the cluster analysis of the different experimental groups were analyzed and compared. Expertise differences were found regarding the pattern of the perceived movement quality. There was a significant correlation between the dendrograms of the visual experts and the motor experts (p = .021), as well as between the dendrograms of the visual experts and the novices (p = .011). There was no significant correlation between the dendrograms of the motor experts and the novices (p = .173). The pattern of the perceived movement quality was not correlated with the holistic kinematic pattern of judged skills (p > .143). These results suggest perceptual and cognitive differences of the participants due to their different previous visual and motor experience.
Heading in Soccer: Does Kinematics of the Head‐Neck‐Torso Alignment Influence Head Acceleration?
Authors: Becker Stephan , Berger Joshua , Ludwig Oliver , Günther Daniel , Kelm Jens , Fröhlich Michael
Published: April 2021

There is little scientific evidence regarding the cumulative effect of purposeful heading. The head-neck-torso alignment is considered to be of great importance when it comes to minimizing potential risks when heading. Therefore, this study determined the relationship between head-neck-torso alignment (cervical spine, head, thoracic spine) and the acceleration of the head, the relationship between head acceleration and maximum ball speed after head impact and differences between head accelerations throughout different heading approaches (standing, jumping, running). A total of 60 male soccer players (18.9 ± 4.0 years, 177.6 ± 14.9 cm, 73.1 ± 8.6 kg) participated in the study. Head accelerations were measured by a telemetric Noraxon DTS 3D Sensor, whereas angles for the head-neck-torso alignment and ball speed were analyzed with a Qualisys Track Manager program. No relationship at all was found for the standing, jumping and running approaches. Concerning the relationship between head acceleration and maximum ball speed after head impact only for the standing header a significant result was calculated (p = 0.024, R2 = .085). A significant difference in head acceleration (p < .001) was identified between standing, jumping and running headers. To sum up, the relationship between head acceleration and head-neck-torso alignment is more complex than initially assumed and could not be proven in this study. Furthermore first data were generated to check whether the acceleration of the head is a predictor for the resulting maximum ball speed after head impact, but further investigations have to follow. Lastly, we confirmed the results that the head acceleration differs with the approach.
Effects of Nutritional Supplements on Judo‐Related Performance: A Review
Authors: Simoncini Leonardo , Lago-Rodríguez Ángel , López-Samanes Álvaro , Pérez-López Alberto , Domínguez Raúl
Published: April 2021

The potential ergogenic effect of nutritional supplements depends on their dosage and the type of exercise executed. Aiming at reviewing the research literature regarding sport supplements utilized in judo in order to improve performance, a literature search was performed at the following databases: Dialnet, PubMed, Scielo, Scopus and SportDiscus. A total of 11 articles met the inclusion criteria and were selected. Evidence revised indicates that supplementation with caffeine, β-alanine, sodium bicarbonate, creatine, and β-hydroxy-β-methylbutyrate has a positive effect on judo-related performance. Moreover, there is evidence suggesting that combining some of these nutritional supplements may produce an additive effect.
Identification, Computational Examination, Critical Assessment and Future Considerations of Spatial Tactical Variables to Assess the Use of Space in Team Sports by Positional Data: A Systematic Review
Authors: Rico-González Markel , Ortega José , Nakamura Fabio , Moura Felipe , Arcos Asier
Published: April 2021

The aim of the review was to identify the spatial tactical variables used to assess the use of space in team sports using positional data. In addition, we examined computational methods, performed a critical assessment and suggested future considerations. We considered four electronic databases. A total of 3973 documents were initially retrieved and only 15 articles suggested original spatial variables or different computation methods. Spatial team sport tactical variables can be classified into 3 principal types: occupied space, total field coverage by several players; exploration space, the mean location (±standard deviations in X- and Y-directions) of the player/team during the entire game; and dominant/influence space, the region the players can reach before any other players. Most of the studies, i.e., 55%, did not include goalkeepers (GKs) and total playing space to assess occupied space, however, several proposed new variables that considered that all playing space could be “played” (i.e. effective free-space, normalized surface area). Only a collective exploration space variable has been suggested: the major range of the geometrical centre (GC). This suggestion could be applied to assess collective exploration space variables at a sub-system level. The measurement of the dominant/influence space has been based on the Voronoi region (i.e. distance d criteria), but several studies also based their computation on the time (t). In addition, several weighted dominant areas have been suggested. In conclusion, the use of spatial collective tactical variables considering the principal structural traits of each team sport (e.g. players of both teams, the location of the space with respect to the goal, and the total playing space) is recommended.
Systemic Lupus Erythematosus with Unusual Manifestations
Authors: Manea Lorena , Popescu Cătălin Mihai , Popescu Raluca , Ion Daniela Adriana , Nicola Andreea Alexandra , Miron-Basalic Paul , Duna Mădălina , Enache Simona , Radu Lucia , Niţu Florina , Groşeanu Laura , Predeţeanu Denisa
Published: April 2021

Systemic lupus erythematosus (SLE) is a chronic autoimmune disease of unknown etiology, presenting with variable clinical picture. Having a high heterogeneity and lacking pathognomonic features, very often the diagnosis poses a great challenge for the clinician. Several unusual clinical manifestations such as nasal septal perforation and digital gangrene can occur in LES patients.

Case report. We report the case of a 42-year-old woman, known with SLE, hospitalized in our department for a clinical presentation consisting of a recent major epistaxis, physical asthenia and acral necrosis of the upper limbs. Physical examination revealed an afebrile patient, with a cushingoid facies, facial telangiectasias, and necrotic scars localized on the distal phalanges, bilaterally.

A diagnostic nasal endoscopy showed a large septal perforation with the absence of the cartilaginous nasal septum. CT highlighted an extended defect at the level of the cartilaginous part of the nasal septum.

Conclusion. Nasal septal perforation remains an underdiagnosed invalidating complication of lupus and treated and discovered early could have an important impact on the general health of an already burdened by disease patient.
Prosthetic Heart Valves Thrombosis with Infectious Endocarditis - A Practical Review
Authors: Stanciu Silviu , Burcin Alexandru , Iancu Diana , Gurzun Maria Magdalena , Croitoru Alexandru , Ciobîcă Lucian
Published: April 2021

Simultaneous or sequential combination of prosthetic valve (PV) thrombosis and infectious endocarditis is a rare clinical finding. The management of these patients involves a complex multidisciplinary strategy using clinical judgment and imaging techniques. Transesophageal echocardiography (TEE) and especially 3D transesophageal echocardiography is essential. Moreover, positron emission tomography with fluorodeoxyglucose (F18-FDG PET/CT) can be a valuable tool to diagnose and manage these complicated clinical scenarios.

We present the case of a 65-year-old patient who was admitted in our clinic for paroxysmal nocturnal dyspnea and chills for one week. He had multiple surgical interventions for rheumatic mitral valve disease (percutaneous mitral valvuloplasty in 2008, and mitral valve replacement and tricuspid annuloplasty in October 2019).

At admission, the diagnosis of prosthetic valve thrombosis was established taking into account the clinical context (low INR values for the last two months), the patient symptoms and the echocardiographic findings. IV unfractionated heparin was administered. One week after admission the patient’s clinical status further deteriorated. TEE reevaluation showed partial thrombus regression with elements suggestive for concomitant infectious endocarditis. The diagnosis key is the clinical evolution and repeated TEE evaluations. In our case, they enabled the probable diagnosis of a sequential association of thrombosis and infectious endocarditis on mechanical PV. The therapeutic approach requires a high clinical suspicion and a prompt management, emergent surgery being the only lifesaving strategy in unstable patients with obstructive mechanical pathology.
Potential of End-User Electricity Peak Load Shift in Latvia
Authors: Lebedeva K. , Borodinecs A. , Krumins A. , Tamane A. , Dzelzitis E.
Published: April 2021

One of the main challenges in the world as well as in Latvia is the reduction of the fossil fuel consumption. Electricity generation, which is still mainly produced by fossil fuel or nuclear power, is one of the largest shares. Nowadays end-users can efficiently control their electricity consumption by shifting electrical loads and taking into account fluctuating electricity price at Nord Pool. The smart metering systems have been expanding, but for the time being, end-users do not use this possibility efficiently.

This study provides an analysis of Latvian electricity consumption specifics and evaluates a potential to shift electricity peak loads. The study includes households, industry and commercial/public sector. Based on the questionnaire distributed among end-users, the initial data on equipment and usage profile were collected. The most essential equipment was reviewed to estimate the potential for load shift. The obtained results show that that there is a positive effect of the load shift. In the household sector, the average electrical load shift can be 6 % (95 GWh/ year) during a period at a cheaper price; in the industry sector on average 37 % (36.58 GWh/ year) and in the commercial/public sector there is no potential due to its specifics (working hours, constant use of refrigerators, etc.).
En rapport från danspedagogens perspektiv
Authors: Edelholm Elisabet Sjöstedt
Published: April 2021

This article is about the first part of the artistic development research project called “Hoppsa Universum”. It was carried out in collaboration with the choreographer Anna Källblad 2006-2008. Ninety children from preprimary schools participated by taking part in dance- and movement sessions at the University College of Dance in Stockholm. After the sessions they were interviewed and the results were:

The children enjoyed dancing and thought it was fun and felt good about dancing

The children preferred running and other loco motor movements

The observations were videotaped and analyzed and the result gave new movements ideas as the children performed their own ideas without any instructions. The importance of exploration and improvisation within the class and within the learning process proved to be essential.
DANCEballad
Authors: Clausen Vicky
Published: April 2021

This article features the DANCEballad project which is in its seventh season of providing high quality dance for children and youngsters (aged 9-15) during their summer holiday.

Everyone with an interest in dance can join the project since no previous dance experience is required. The purpose of the project is to offer an opportunity for the participants to compose, perform and appreciate dance through their own uniqueness in cooperation with others. Another purpose of the project is to make dance become more visible throughout the regions by creating a base for development, continuity and interest for dance in the community in general.

The DANCEballad has been a great success with more than 600 student-dancers involved each summer.

Within only one week, the summer school dancers from each region have to create their own dance performance and present the choreography on a professional stage. The benefits for the participants from joining the project naturally vary from child to child. Previous evaluations show that personal and aesthetic development is part of the main benefits which e.g. become visible through enhanced self-confidence. In an aesthetic manner they broaden their horizons, interests and understandings of what dance can be and do. Through an interview with Sara Sejrskild, a DANCEballad participant, we get an example of what the summer dancers can achieve from the project.
Corridor – Käytävä Kulttuuriseen Mosaiikkiin
Authors: Turpeinen Isto
Published: April 2021

This article discusses a youth dance project called Corridor and its pedagogic and choreographic process. It introduces the author’s approach to coordinating and choreographing the project and argues for the benefits of working with youngsters cross-culturally.

Corridor took place at Kuopio Dance Festival in June 2009, bringing nearly 50 young dancers from six different countries onto the Music Centre stage. The title of the event, corridor, was turned into the theme of the concrete artistic work. It expresses a kind of space and mobility between people and ideas. Spectators, as well as choreographers and dancers opened doors to different cultures – here culture refers to the live, social environment which touches us, and in which the public and the private, the collective and the individual meet.

The author’s choreographic and pedagogical approach proceeds from a general to a detailed one. The work evolves in a spiral form starting from action which opens channels for relating to the present moment through dancing. Then this experienced action is shared and reflected on, either physically or verbally. The author aims at shared power and genuine dialogue. Similarly, instead of taking difference and complex dynamics as a threat, they are considered as resources and possibilities.

Corridor was a part of Keðja Kuopio a project which focused on children and young people. Furthermore, Keðja Kuopio belongs to Keðja project (Dance Encounters 2008 – 2010), the vastest platform so far aimed at dance artists as well as educators, producers and scholars to meet and address important issues within the contemporary dance field in the Nordic/Baltic region.
”To allow oneself to dance….”
Authors: Engelsrud Gunn
Published: April 2021

The purpose of the article is to illuminate the experiences of young dancers working with their own individual training in a context of contemporary dance education. Through a three-year programme, the students have kept logbooks and developed material based on the question: What were the essential experiences of individual training today? From having a focus on training strength, mobility, resilience, stamina and balance in the beginning, they often reoriented their training so as to give themselves the space to relate to and create confidence that their own subjective and relational experiences have validity in a professional dance context. As young, prospective professionals they learn gradually that what they experience is “not wrong”, but an expression of “where they are”. Their experiences contribute to the questioning of “narrow” definitions which a number of dance researchers also do today.
Political by Design: Costume Design Strategies within the Finnish Contemporary Dance Productions AmazinGRace, Noir? and The Earth Song
Authors: Helve Tua
Published: April 2021

This article examines costume design within three Finnish contemporary dance productions in the 2010s,
AmazinGRace, Noir? and The Earth Song,
by respective costume designers Soile Savela, Sanna Levo and Karoliina Koiso-Kanttila, to identify the ways in which costume works within performances with political themes through cases that make use of ‘everyday’ garments as costumes. Here, everyday garments as
costume
refers to identifiable forms, silhouettes and connotations, as opposed to fantasy or ‘abstract’ costumes. Political, as defined by the themes of these performances, means subject to power relations: societal inequality, ethnicity and otherness and climate change. Despite having shared ground in employing everyday, real-life costume components, all three designs operate with a distinct strategy. Hence, this article discusses three strategies for materializing political aesthetics through costume: one that is
inclusive
in its use of ‘ordinary’ clothes as costume; one that builds itself through
ready-made
connotation and representation in costume; and one that is
associative
in its approach towards the capacity of costume. This investigation, from the perspective of a costume researcher and designer, not only argues for the potential of costume to communicate political meaning through its aesthetic choices but also reveals the versatility embedded in this under-researched area of everyday garments as costume within contemporary dance performance.
Dancing the ‘American Dream’: Dance Competition Culture in Times of Shifting Values
Authors: Schupp Karen
Published: April 2021

Dance competitions–events where local dance studios that are focused on contemporary, jazz, ballet, hip hop and tap compete in regional and national events for awards–are not simply venues for entertainment; they are a microcosm of the social and cultural values in the United States. Competitors need to persevere despite personal challenges, the open entry system for competitions makes it seem that anyone who can pay the entry fee has an equal chance at winning first place, and the construction of a glamorous performance all reinforce the myth of the American Dream—if you work hard, you can achieve fame.

Drawing on original and previously published theoretical and empirical studies of the culture surrounding dance competitions, this article investigates dance competition culture in relation to shifting United States democratic ideals. If the dance competition culture does in fact reflect broader United States socio-cultural and political values, what does this mean in relation to Donald Trump’s ascendency and the emerging political values of ‘Generation Z’, or those who were born after the year 2000 (the key participants in dance competition culture). Examining both the dancing that occurs in and the frameworks and practices that support the dance competition culture raises valuable questions about the performance of United States democratic ideals on the dance competition stage.
Effects of Self-Administered GH or IGF-1 Hormones on Resting Oxidative Stress and Antioxidant Markers in Men with or Without Resistance Exercise
Authors: Mohammadjafari Heidar , Arazi Hamid , Nemati Nematollah , Bagherpoor Tahereh
Published: April 2021

Introduction. Some athletes and non-athletes use peptide hormones to increase lean body mass and fat loss, but those effects on oxidative stress and antioxidant markers are unknown. The aim of this study was to show the physiological profile of oxidative stress and antioxidant markers in athletes and non-athletes following long-term self-administration of GH or IGF-1

Material and Methods. Seventy-five healthy young men with the history of peptide hormone (i.e., GH or IGF-1) use for at least 1 year (i.e., 3 to 4 times a year) or resistance exercise (RE) experience for at least 3 years volunteered to participate in this study and were divided into 5 selected groups including 1) GH use plus RE (GH+RE, n = 15), 2) IGF-1 use plus RE (IGF-1+RE, n = 15), 3) GH use (GH, n = 15), 4) IGF-1 use (IGF-1, n = 15), and 5) RE only (RE, n = 15). Blood sample was obtained one time in order to evaluate the resting concentration of oxidative stress markers including 8-hydroxy-2-deoxyguanosine (8-OHdG), malondialdehyde (MDA), nitric oxide (NO) and antioxidant defense systems (i.e., glutathione peroxidase [GPx], catalase [CAT], and glutamate [GLU]).

Results. There were no significant (p > 0.05) differences among the groups in the 8-OHdG, MDA, NO, GPx, CAT, and GLU levels.

Conclusions. Self-administration of peptide hormone and RE for at least 1 year is not accompanied by alterations in resting oxidative stress and the antioxidant system in male athletes and non-athletes.
Impact of subgrade and backfill stiffness on values and distribution of bending moments in integral box bridge
Authors: Helowicz Andrzej
Published: April 2021

The article presents parametric analysis regarding the impact of subgrade and backfill stiffness on values and distribution of bending moments in the structural elements of a small integral box bridge made of cast in situ reinforced concrete. The analyzed parameters are the modulus of subgrade reaction under and behind the bridge structure (kv kh). At the beginning, the author presents the integral box bridge and selected parts of the bridge design. In particular, the author focuses on the method of modeling of the subgrade stiffness parameters under and behind the bridge structure, as well as their impact on the values and distribution of bending moments in the bridge structural elements. The bridge was designed by the author and built on the M9 motorway between the towns of Waterford and Kilcullen in Ireland. In conclusions, the author shares his knowledge and experience relating to the design of small integral bridges and culverts and puts forward recommendations as to further research on these type of structures in Poland.
Preliminary assessment of coastal erosion and local community adaptation in Sayung coastal area, central java – Indonesia
Authors: Marfai Muh Aris
Published: April 2021

. Dynamic environment in coastal area, especially due to coastal erosion process, has negative impact on human environment. Sayung coastal area, located in Central Java-Indonesia, has experienced severe impact of coastal erosion. As the result of the coastal erosion, hundreds of settlement located in coastal area has been destructed. Moreover, fishponds as the land use dominated in the coastal area also has been severely destroyed. Besides the coastal erosion, increasing of inundated area due to sea level rise also threaten the local community. Although devastating impact suffering the coastal area, the people of Tambaksari, as the part of Sayung area, decided to live and adapt with the coastal erosion. This paper aims to identify the coastal erosion and understand adaptation strategies held by the local community related to reduce the impact of the coastal erosion. Based on this research, various adaptation strategies has been identified, namely (1) Planting mangrove alongside the shoreline, (2) elevating the ground level, (3) building staged house, (4) utilizing deep well for freshwater supply, (5), maintaining social interaction with mainland community, (6) Collecting fish from the mangrove as the food, and (7) changing work into the tourism sector.