bluuebunny/crossref_metadata_2025_split huggingface dataset:
Το στερεοσκόπιο του smart phone και του tablet στη μαθησιακή δραστηριότητα στη τάξη αλλά και στην μελέτη του περιβάλλοντος. Η σωστή χρήση των κινητών τηλεφώνων και των tablets
Authors: Αιβαλιώτης Δημήτριος , Φραγγατζής Πέτρος , Κατάκαλου Βασιλική , Παυλής Γιώργιος , Γιαβρίμης Ραφαήλ , Βασιλείου Δανάη , Σίσκας Αθανάσιος , Αθηνιώτης Αλέξανδρος , Κουτσούμπας Ιωάννης , Κλειδαράς Αλέξανδρος , Βαμβουρέλλης Δημοσθένης , Βαλαβάνης Γιώργιος , Σαλιαμπούκος Θεόδωρος , Σάκκης Ασημάκης-Παναγιώτης , Κεχρινιώτη Μαρία-Νεφέλη , Κεχρινιώτης Παναγιώτης , Καζαντζή Ελένη , Γαλής Ευστράτιος , Βαφέας Αλέξανδρος , Καρούλης Δημήτριος , Μπέττι Γαβριήλ Ουγκώ , Βαρβάρας Κωνσταντίνος , Φραγγατζής Δημήτριος , Ταμβακέρας Βλάσσιος 
Published: September 2019

Σωστή ή λάθος η χρήση των tablets και των smart-phone στα σχολεία? Πώς επιδρά στις επιδόσεις των μαθητών?Αν επιχειρήσουμε να δώσουμε στην τεχνολογία μια θέση στην εκπαιδευτική διαδικασία, δηλαδή ως εργαλείο διερεύνησης και μάθησης και όχι ευκαιρία για διασκέδαση ή μέσο για άσκοπες πλοηγήσεις, τότε ίσως έχουμε μπροστά μας μία άλλη οπτική γωνία στη διδασκαλία. Προχωρήσαμε λοιπόν σε μια απλή κατασκευή με φτηνά μέσα και πολύ εύκολη χρήση που στηρίζεται στις ικανότητες των σύγχρονων κινητών και tablets και με τα οποία εξερευνούμε εύκολα το μικρόκοσμο που μας περιβάλλει. Η κατασκευή αυτή έγινε προκειμένου να μελετήσουμε ευμεγέθεις μικροοργανισμούς που ζουν στο θαλασσινό νερό και όχι μόνο. Φτιάξαμε ένα στερεοσκόπιο που μπορεί να χρησιμοποιηθεί στο σχολείο, στο φυσικό περιβάλλον και είναι εύκολο να χρησιμοποιηθεί από το νηπιαγωγείο μέχρι το λύκειο. Απλά υλικά από πλέξιγκλας και με αναζήτηση απλών φτηνών φακών κατάλληλα επιλεγμένων και τοποθετημένων, προσέχοντας τη γεωμετρία της κατασκευής φτιάξαμε το στερεοσκόπιο που θα παρουσιάσουμε. Η αρχική ιδέα είναι γνωστή στο διαδίκτυο, αλλά σε απλή μορφή, με άλλα υλικά και αμφίβολη χρήση. Η χρήση του στερεοσκοπίου που φτιάξαμε μας εξέπληξε και ξεπέρασε τα αναμενόμενα, δίνοντας εξαιρετικές φωτογραφίες, βίντεο αλλά και την ικανότητα μέσω του διαδικτύου να μεταφέρουμε όλα αυτά που είδαμε σε άλλους μαθητές και χρήστες, όπως η συνεργασία με το Σχολείο της Ίμβρου στη Τουρκία μέσω της τηλεδιάσκεψης. Αξιοποιώντας τις νέες τεχνολογίες σε ομαδοσυνεργατικές εργασίες, πειραματιζόμαστε δημιουργούμε το δικό μας πολυμεσικό υλικό και το παρουσιάζουμε, ενώ αυτοαξιολογούμαστε από ειδικά διαμορφωμένες εφαρμογές μέσα από ένα εύχρηστο και προσβάσιμο περιβάλλον εργασίας.
Η μελέτη της επίδρασης της θερμοκρασίας στο θαλάσσιο οικοσύστημα με τη βοήθεια ενός ρομπότ, Hydrobot
Authors: Αιβαλιώτης Δημήτριος , Παυλής Γεώργιος , Σίσκας Αθανάσιος , Βασιλείου Δανάη , Γαβριήλ Μπέτυ , Αθηνιώτης Αλέξανδρος , Κουτσούμπας Ιωάννης , Βαμβουρέλλης Δήμος , Βαφέας Αλέξανδρος , Γαλής Ευστράτιος , Ταμβακέρας Βλάσσης 
Published: September 2019

Το θέμα της μελέτης μας είναι η επίδραση της θερμοκρασίας στη ποιότητα του θαλάσσιου οικοσυστήματος. Το συγκεκριμένο ερώτημα τέθηκε μετά μια επίσκεψη μας στο εργοστάσιο της ΔΕΗ στη Μυτιλήνη και την παρατήρηση της απορροής του θερμού νερού της ψύξης των μηχανών στο παρακείμενο θαλάσσιο περιβάλλον. Είναι γνωστό από τη βιολογίας και χημεία ότι η άνοδος της θερμοκρασίας του νερού έχει ως αποτέλεσμα την μείωση της διαλυτότητας των αερίων στο νερό, άρα και του Οξυγόνου και μας ενδιέφερε η υφιστάμενη κατάσταση του οικοσυστήματος. Προχωρήσαμε σε επιτόπια καταγραφή της υπάρχουσας κατάστασης με μετρήσεις θερμοκρασίας του νερού ψύξης των μηχανών από το σημείο απορροής, σε επιλεγμένα σημεία του χειμάρρου, στο σημείο επαφής με το θαλασσινό νερό, αλλά και τη διασπορά του μέσα στο θάλασσα. Για της μετρήσεις χρησιμοποιήθηκε το Hydrobot με τους αισθητήρες Arduino, που κατασκευάσαμε με υλικά που μας παρείχε το Ίδρυμα Ευγενίδου αλλά και το σκάφος του Πανεπιστημίου Αιγαίου με τα όργανα του, σε συνεργασία με καθηγητές του Πανεπιστημίου. Με κατάλληλα όργανα μετρήσαμε τα θαλάσσια ρεύματα, ποντίζοντας το ρομπότ και παίρνοντας μετρήσεις με τους αισθητήρες , που μεταφέραμε στο κομπιούτερ για αξιολόγηση. Από τις μετρήσεις βρέθηκε μεγάλη άνοδο της θερμοκρασία του νερού σε τρία σημεία. Σε περαιτέρω αναζήτηση πληροφοριών επιβεβαιώθηκε για πρώτη φορά εργαστηριακά η ύπαρξη υποθαλάσσιων θερμών πηγών με θερμοκρασία 500 περίπου
Διδάσκοντας την κίνηση μέσα από την εξέλιξη της Φυσικής
Authors: Ανδρεαδέλλης Μιχάλης , Κατηφόρη Αναστασία , Κομινάτος-Γεννατάς Γεώργιος , Μελέτης Εμμανουήλ , Μπάρτζη Χαρίκλεια-Ειρήνη , Ανδρεαδέλλης Μιχαήλ , Αρβανίτης Παύλος 
Published: September 2019

Στη παρούσα εργασία θα μελετήσουμε από τη βιβλιογραφία την εξέλιξη των εννοιών που περιγράφουν και των θεωριών που ερμηνεύουν την κίνηση των σωμάτων από την αρχαιότητα μέχρι σήμερα πλαισιωμένη με την αντίστοιχη πειραματική διαδικασία. Θα προσεγγίσουμε το επιστημονικό αντικείμενο ολιστικά ακολουθώντας όχι μόνο τη δια-χρονική εξέλιξή του αλλά και διερευνώντας παράλληλα τους παράγοντες οι οποίοι επηρεάζουν την καθημερινότητα των επιστημόνων και διαμορφώνουν τις διανοητικές διεργασίες που απαιτούνται για τις επιστημονικές κατακτήσεις της κάθε εποχής. Επίσης θα προσεγγίσουμε τις αντίστοιχες έννοιες μέσα από το πείραμα, κατασκευάζοντας οι ίδιοι τις πειραματικές διατάξεις δίνοντάς μας την ευκαιρία να αναπτύξουμε δεξιότητες στις κατασκευές και να διατυπώσουμε ιδέες και προτάσεις προσομοίωσης.
Two weeks as a chemist
Authors: Zambrotta Maria , Mazzuia Daniela 
Published: September 2019

“Two weeks as a chemist” is a project developed for sixteen-year-old students from the Secondary School Santorre di Santarosa (Turin). The project aims to increase students’ motivation and interest in science by providing them a working experience in a chemist’s store and is made with the collaboration between schools and local stakeholders. It encourages the use of new methodologies in the classroom and the contextualization of STEM learning.
Evaluation and pilot implementation of essential interventions for the management of hypertension and prevention of cardiovascular diseases in primary health care in the Republic of Tajikistan
Authors: Collins Dylan R.J. , Laatikainen Tiina , Shoismatuloeva Mekhri , Mahmudzoha Isfandiyor , Rahimov Zakriya , Sultonova Dilorom , Jonova Bunafsha , Farrington Jill L. 
Published: September 2019

Background: Non-communicable diseases (NCDs) are the leading cause of death worldwide and are a major burden in Tajikistan. The health system of Tajikistan is still shaped by the country's Soviet legacy and the pace of reform has been slow, with high patient out-of-pocket expenditure. The aim of this study is to determine the feasibility of implementing and evaluating essential interventions for the management of hypertension and prevention of cardiovascular disease in primary health care in Tajikistan. Methods and analysis: A pragmatic, sequential mixed methods explanatory design, composed of quantitative and qualitative strands will be used with greater weighting of the quantitative strand. A single geographic district was nominated by the Ministry of Health and chosen for implementation. All primary health care centres in the district that meet inclusion criteria will be included; half will be randomly assigned to the intervention arm and half to the control arm. The overall process is organized into seven steps: (1) refresh clinical decision-making tools including open source WHO PEN and HEARTS resources; (2) update training package for primary health care workers; (3) collection of baseline data; (4) training staff in intervention clinics; (5) implementation of protocols and implementation coaching; (6) collection of follow-up data after 12 months; (7) evaluation of results and sharing experience. Ethics and dissemination: Ethical review and approval have been obtained. Findings will be disseminated at the participant level, national level through a national conference of key stakeholders, and internationally through publication in an open-access peer review journal.
Case Report: Exploratory treatment with multiple intravenous infusion of the autologous adipose tissue-derived mesenchymal stem cells for the treatment of Diamond-Blackfan anemia patient
Authors: Ra Jeong Chan , Park Jong Im , Yang Pil Soon 
Published: September 2019

Diamond-Blackfan anemia (DBA) is a rare congenital erythropoietic disorder characterized by erythroblastopenia. Conventional treatments of DBA are the administrations of corticosteroids and blood transfusions for mitigation of anemia, and bone marrow transplantation. However, there are hurdles to overcome for long-term use and the conventional treatment. Mesenchymal stem cells (MSCs) have been noted as a novel alternative cell therapy in various diseases, and adipose tissue-derived MSCs (AdMSCs) are known for their versatile efficacies and feasibility. Here, we report the potential efficacies and the safety of intravenous administration of the autologous AdMSC in a patient with DBA for the first time. The isolation and characterization of autologous AdMSCs from a girl aged 11 years, 10 months with DBA were carried out due to the mutation of ribosomal protein s24 (RPS24). AdMSCs, diluted to 1 x 108 cells in 100 ml of saline, were infused intravenously for 1 hour. Intravenous administration of AdMSCs was carried out 5 times in 2-week intervals, and the patient was checked using various assessments (vital signs, physical examination, laboratory tests, adverse events, etc) at every visit. After 3, 6 and 9 months from the first administration of AdMSCs, red blood cell (RBC) count, hemoglobin value, and hematocrit were assessed for the efficacy. There were no side effects or adverse events observed during the treatment. Although showing subnormal values, the RBC number, hemoglobin level, and hematocrit were improved 9 months after the systemic administration of AdMSCs from baseline; the RBC count (x106 /μl), hemoglobin level (g/dl) and hematocrit level (%) were increased from 1.58 to 2.38, 5.6 to 8.3, and 16.9 to 26.1, respectively. The present case reported the first AdMSC administration for DBA patient and indicates it is possible that the intravenous administration of autologous AdMSC can be a safe alternative for DBA treatment.
The fertility impact of achieving universal health coverage in an impoverished rural region of Northern Ghana
Authors: Phillips James F. , Jackson Elizabeth F. , Bawah Ayaga A. , Asuming Patrick O. , Awoonor-Williams John Koku 
Published: September 2019

Background: When a successful Navrongo Health Research Centre service experiment demonstrated means for reducing high fertility and childhood mortality in a traditional societal setting of northern Ghana, the Ministry of Health launched a program of national scaling up known as the Community-based Health Planning and Services (CHPS) initiative. For two decades, CHPS has been Ghana’s flagship program for achieving universal health coverage (UHC). When monitoring during its first decade determined that the pace of CHPS scale-up was unacceptably slow, the Ghana Health Service launched the Ghana Essential Health Interventions Program (GEHIP) in four Upper East Region districts to test means of accelerating to CHPS implementation and improving its quality of care. Methods: To evaluate GEHIP, a two-round randomized sample survey was fielded with clusters sampled at baseline that were reused in the endline to facilitate difference-in-difference estimation of changes in fertility associated with GEHIP exposure. Monitoring operations assessed the location, timing, and content of CHPS primary health care. Discrete time hazard regression analysis on merged baseline and endline birth history data permit estimation of GEHIP fertility and CHPS access effects, adjusting for hospital and clinical service access and household social and economic confounders. Results: GEHIP exposure was associated with an immediate acceleration of CHPS implementation and coverage. Women residing in households with CHPS services had only slightly lower fertility than women who lacked convenient access to CHPS. GEHIP impact on contraceptive use was statistically significant but marginal; GEHIP exposure was associated with increasing unmet need. Conclusion: Results challenge the assumption that achieving UHC will reduce excess fertility. Social mobilization, community-outreach, connection of family planning discussions with male social networks are elements of the Navrongo success story that have atrophied with CHPS scale-up. Achieving UHC does not address the need for renewed attention to these family planning focused strategies.
How Do You Search for the Best Alternative? Experimental Evidence on Search Strategies to Solve Complex Problems
Authors: Sommer Svenja C. , Bendoly Elliot , Kavadias Stylianos 
Published: September 2019

Through a controlled two-stage experiment, we explore the performance of solution search strategies to resolve problems of varying complexity. We validate theoretical results that collaborative group structures may search more effectively in problems of low complexity but are outperformed by nominal structures at higher complexity levels. We call into question the dominance of the nominal group technique. Further close examination of search strategies reveals important insights: the number of generated solutions, a typical proxy for good problem-solving performance, does not consistently drive performance benefits across different levels of problem complexity. The average distance of search steps and the problem space coverage also play critical roles. Moreover, their effect is contingent on complexity: a wider variety of solutions is helpful only in complex problems. Overall, we caution management about the limitations of generic, albeit common, rules of thumb, such as “generate as many ideas as possible.”This paper was accepted by Yan Chen, decision analysis.
Postcholecystectomy Biliary Clip Migration Causing Acute Pancreatitis
Authors: Panara Ami , Barkin Jodie A. , Barkin Jamie S. 
Published: September 2019

ABSTRACT
Postcholecystectomy biliary clip migration is a rare but important cause of acute pancreatitis (AP). We report the case of a patient with laparoscopic cholecystectomy for cholelithiasis with cholecystitis and recurrent AP 15 and 19 months after. Imaging findings were suggestive of biliary clip migration. Suspected mechanisms for endoclip migration–induced AP include migration of the clip at a site of dehiscence and migration. When considering this diagnosis, a plain radiograph may be helpful as a comparison to previous imaging to assess for changes in the number of endoclips present, and proper diagnosis can help lead to appropriate management.
Pengaruh Jenis Mordan dan Proses Mordanting Terhadap Kekuatan dan Efektifitas Warna Pada Pewarnaan Kain Katun Menggunakan Zat Warna Daun Jambu Biji Australia
Authors: Fadilah Ahmad Ardani , Hidayati Nur 
Published: September 2019

Perkembangan penggunaan pewarna alami sebagai pewarna tekstil semakin mendapat perhatian karena alasan lingkungan. Daun jambu biji Australia merupakan tanaman tropis dan sub tropis yang berpeluang sebagai sumber zat warna alami karena kandungan tannin dan flavanoida-nya yang tinggi. Penelitian ini bertujuan untuk mengkaji pewarnaan kain katun menggunakan zat warna dari daun jambu biji Australia berdasarkan variasi jenis proses mordanting dan jenis mordan yang digunakan. Proses mordanting dikaji adalah pre-, meta- dan post-mordanting, sedangkan jenis mordan yang digunakan yaitu tawas, kapur dan tunjung. Respon yang diuji yaitu absorbansi larutan zat warna setelah pencelupan. Pewarnaan pada kain katun menghasilkan warna kecoklatan dan pewarnaan terbaik menggunakan mordan tawas melalui proses post-mordanting.Kata kunci: pewarna alami tekstil; daun jambu biji Australia; mordanting.
Representations of constant socle rank for the Kronecker algebra
Authors: Bissinger Daniel 
Published: September 2019

Abstract
Inspired by recent work of Carlson, Friedlander and Pevtsova concerning modules for p-elementary abelian groups

E
r

{E_{r}}

of rank r over a field of characteristic

p
>
0

{p>0}

, we introduce the notions of modules with constant d-radical rank and modules with constant d-socle rank for the generalized Kronecker algebra

𝒦
r

=

k
⁢

Γ
r

{\mathcal{K}_{r}=k\Gamma_{r}}

with

r
≥
2

{r\geq 2}

arrows and

1
≤
d
≤

r
-
1

{1\leq d\leq r-1}

.
We study subcategories given by modules with the equal d-radical property and the equal d-socle property.
Utilizing the simplification method due to Ringel, we prove that these subcategories in

mod
⁡

𝒦
r

{\operatorname{mod}\mathcal{K}_{r}}

are of wild type.
Then we use a natural functor

𝔉
:

mod
⁡

𝒦
r

→

mod
⁡

k
⁢

E
r

{\operatorname{\mathfrak{F}}\colon{\operatorname{mod}\mathcal{K}_{r}}\to%
\operatorname{mod}kE_{r}}

to transfer our results to

mod
⁡

k
⁢

E
r

{\operatorname{mod}kE_{r}}

.
Effect of Holes Drilled Various Distances from the Edge of Douglas Fir Utility Poles Tested in Bending
Authors: Romanaggi Ben , Sinha Arijit , Konkler Matthew J. , Morrell Jeffrey J. 
Published: September 2019

Abstract
Wood utility poles are one of the most critical components of U.S. infrastructure. In the Pacific Northwest, Douglas fir is the species of wood predominantly used. Douglas fir has a relatively thin band of treatable sapwood surrounding an impermeable, but only moderately durable, heartwood core that is susceptible to internal decay. Historically, through boring has been the most commonly adopted practice for improving the performance of Douglas fir poles. Despite the inclusion of through boring in national utility standards, questions continue to rise regarding through boring. One important question regarding the process is how close to the edge holes should be drilled. The objective of this study was to assess the effects of through boring edge distance on the flexural strength of Douglas fir poles using a combination of full-scale flexural testing of poles as well as finite element analysis (FEA). Full-scale testing of 48 utility poles revealed that drilling holes within 50 or 75 mm of the outer edge of a pole had no significant effect on flexural properties. FEA consistently predicted failure modes and flexural properties after accounting for through boring and knot locations. These models could be improved through more accurate representation of grain around knots and then used to explore the effects of different sizes, species, quantities of knots and checks, and other drilling patterns on strength, and, therefore, would reduce the need for actual physical testing.
Investigation of Disintegration Behaviors of Clay-Bearing Rocks by a New Methodology
Authors: Cao Xue-Shan , Lai Xi-Yang , Lisu E. 
Published: September 2019

Abstract
Disintegration behaviors of clay-bearing rocks are special engineering problems. Samples are isolated and unconstrained in previous disintegrating-durability tests, unlike clay-bearing rocks under the natural controlled condition in the field. Then, a methodology of disintegration testing regarding natural controlled conditions was evaluated to study the disintegration behaviors of clay-bearing rocks. The study results indicated that the fissure area ratio (FAR) increases rapidly before the seventh wetting-drying cycle and then begins a stable trend. The fragment size distribution characteristics show that the proportion of small fragments gradually increases and that the proportion of large fragments gradually decreases with the increase in the number of wetting-drying cycles. Clay-bearing rock fragments larger than 2 mm disappear after seven wetting-drying cycles. The change characteristics of the disintegration resistance of the disintegrating clay-bearing rock are that, regardless of the critical fragment size diameter (Dcr) of complete disintegration, the slake durability index (I(D)) and disintegration ratio (DR) are reduced. The disintegration degree of aggregate fragments is further reflected by the DR, which corresponds with the FAR. A trend of the maximum shear stress related to the number of wetting-drying cycles has two stages: the first significant and then insignificant decrease. The critical number of wetting-drying cycles is seven, after which point the disintegrating clay-bearing rock fragments with a size coarser than 2 mm disappeared. The results indicate the highly positive correlation between strength and the DR of the disintegrating clay-bearing rock.
Risperidone Ameliorates Prefrontal Cortex Neural Atrophy and Oxidative/Nitrosative Stress in Brain and Peripheral Blood of Rats with Neonatal Ventral Hippocampus Lesion
Authors: Tendilla-Beltrán Hiram , Meneses-Prado Silvia , Vázquez-Roque Rubén Antonio , Tapia-Rodríguez Miguel , Vázquez-Hernández Andrea Judith , Coatl-Cuaya Heriberto , Martín-Hernández David , MacDowell Karina S. , Garcés-Ramírez Linda , Leza Juan C. , Flores Gonzalo 
Published: September 2019

Reduction of the dendritic arbor length and the lack of dendritic spines in the pyramidal cells of the prefrontal cortex (PFC) are prevalent pathological features in schizophrenia (SZ). Neonatal ventral hippocampus lesion (NVHL) in male rats reproduces these neuronal characteristics and here we describe how this is a consequence of BDNF/TrkB pathway disruption. Moreover, COX-2 proinflammatory state, as well as Nrf-2 antioxidant impairment, triggers oxidative/nitrosative stress, which also contributes to dendritic spine impairments in the PFC. Interestingly, oxidative/nitrosative stress was also detected in the periphery of NVHL animals. Furthermore, risperidone treatment had a neurotrophic effect on the PFC and antioxidant effects on the brain and periphery of NVHL animals; these cellular effects were related to behavioral improvement. Our data highlight the link between brain development and immune response, as well as several other factors to understand mechanisms related to the pathophysiology of SZ.SIGNIFICANCE STATEMENTPrefrontal cortex dysfunction in schizophrenia can be a consequence of morphological abnormalities and oxidative/nitrosative stress, among others. Here, we detailed how impaired plasticity-related pathways and oxidative/nitrosative stress are part of the dendritic spine pathology and their modulation by atypical antipsychotic risperidone treatment in rats with neonatal ventral hippocampus lesion. Moreover, we found that animals with neonatal ventral hippocampus lesion had oxidative/nitrosative stress in the brain as well as in the peripheral blood, an important issue for the translational approaches of this model. Then, risperidone restored plasticity and reduced oxidative/nitrosative stress of prefrontal cortex pyramidal cells, and ultimately improved the behavior of lesioned animals. Moreover, risperidone had differential effects than the brain on peripheral blood oxidative/nitrosative stress.