cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Μεθοδολογία τρισδιάστατης απεικόνισης κτιρίων με χρήση αυτόνομων ιπτάμενων συσκευών (drones)
title: Methodology for 3D building imaging using autonomous flying devices (drones)
Creators: name: Τσαρουχας Δημητριος
Publisher: name: Technical University of Crete
Year: 2017

description: Σκοπός της διπλωματικής εργασίας είναι η αναλυτική παρουσίαση του λογισμικόυ Pix4Dmapper της εταιρείας Pix4D και η τρισδιάστατη απεικόνιση κτιρίων του Πολυτεχνείου Κρήτης. Στην εργασία θα παρουσιαστούν αναλυτικά όλα τα βήματα που ακολουθήθηκαν. Εισαγωγικά, υπάρχει αναφορά στην μεθοδο της φωτογραμμετρίας και στα μη επανδρωμένα ιπτάμενα σκάφη (UAV-drone). Στη συνέχεια γίνεται παρουσίαση του drone που χρησιμοποιήσαμε για τη λήψη των φωτογραφιών, όπου και με τη βοήθεια του Pix4Dmapper, καταλήξαμε στο 3D μοντέλο μιας περιοχής του Πολυτεχνείου Κρήτης.
description: The aim of the postgraduate diploma thesis is the detailed presentation of the Pix4D software and the three-dimensional representation of the buildings of the Technical University of Crete. All the steps followed will be presented in detail. In the introduction, there is a reference to the photogrammetry method and unmanned aerial vehicle (UAV-drone). Then we present the drone we used to take the pictures, whereby with the help of the Pix4D software, we ended up in the 3D model of an area of the Technical University of Crete.
title: Επιχειρησιακή ανάλυση παραμέτρων στοχοποίησης κινητών στόχων (άρματος) που επιδέχονται αλλοίωση και μέθοδοι φασματικής παραλλαγής-παραπλάνησης-απόκρυψης
Creators: name: Μηλιαδης Θεοδωρος
Publisher: name: Technical University of Crete
Year: 2017

description: Σκοπός της συγκεκριμένης εργασίας είναι η βελτίωση, η συμπλήρωση και τέλος η συνέχιση της παθητικής άμυνας της χώρας μας όσον αφορά το κομμάτι των αρμάτων και των κινητών στόχων γενικότερα στο επίπεδο της ηλεκτρονικής παρατήρησης μέσω διαφόρων σύγχρονων συστημάτων. Αυτά μπορεί να είναι Ραντάρ, Θερμικές κάμερες ,συστήματα νυχτερινής παρατήρησης, σύγχρονα συστήματα αεροσκαφών (Flir systems, Sar systems, IR systems, Lantirn systems), UAV και τέλος δορυφορικά συστήματα.

Επίσης θα μας απασχολήσει πάρα πολύ και η τεχνολογία Stealth η οποία τα τελευταία χρόνια απασχολεί πάρα πολύ τους σχεδιαστές όλων των αμυντικών συστημάτων ενώ παλαιότερα μόνο τους σχεδιαστές αεροσκαφών.

Θα αναλυθεί επιπλέον ο τρόπος λειτουργίας των συστημάτων ώστε να δούμε πως θα μπορεί να μειωθεί η δυναμικότητα αυτών των συστημάτων όχι μόνο για άρματα μάχης αλλά ακόμη και για προσωπικό, οχήματα γενικής χρήσεως και εγκαταστάσεις.

Θα γίνει ανάλυση των παραμέτρων που προσδιορίζουν το μέγεθος των υπογραφών των επιφανειών κινητών στόχων. Στη συνέχεια θα εντοπιστούν ακριβώς οι κρίσιμες παράμετροι που απαιτούνται για να αλλοιώσουν τα χαρακτηριστικά των υπογραφών τους προκειμένου να επιτευχτεί αποτελεσματική προστασία. Ο όρος προστασία στο πλαίσιο της εργασίας περιλαμβάνει το σύνολο των εφαρμόσιμων πρακτικών-τεχνικών για αποτελεσματική απόκρυψη, παραλλαγή και παραπλάνηση έναντι συγκεκριμένης απειλής. Τέλος, με τον προσδιορισμό των παραμέτρων προς αλλοίωση και των πλέον κατάλληλων τεχνικών θα επιχειρηθεί ο προσδιορισμός μέσα από λεπτομερή επιχειρησιακή ανάλυση δεδομένων στόχου και απειλής του τρόπου προστασίας του.
Additional file 1 of Association between serum zinc levels and basic physical functioning: secondary data analysis of NHANES 2011–14
Creators: name: Gau, Jen-Tzer
name: Chavan, Bhakti
name: Li, Yang
name: Clark, Brian C.
name: Haile, Zelalem T.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Mental Health

description: Additional file 1: Appendix Table 1A. The distribution of basic physical functioning difficulty in continuous variables (coded as 0 to 12) of NHANES 2011–14 participants aged 50 and older (total N = 1136). Appendix Table 1B. The distribution of counts in difficulty of basic physical functioning in four aspects (feeding, dressing, transferring, and walking) of NHANES 2011–14 participants aged 50 and older (total N = 1136). Appendix Table 2. Multivariate logistic regression analysis of factors associated with basic physical functioning difficulty in the 2011–14 NHANES data stratified by sex.
title: A web-based java implementation of the Link-11 protocol
title: Υλοποίηση πλατφόρμας διαχείρισης επικοινωνιών Link-11
Creators: name: Παπακοτουλας Ανεστης
Publisher: name: Technical University of Crete
Year: 2017

description: Η Διοίκηση και ο Έλεγχος (Command & Control) αποτελούν κύριες συνιστώσες των στρατιωτικών επιχειρήσεων και αποτελούνται από την ηγεσία και τις κατευθύνσεις οι οποίες δίνονται στους στρατιωτικούς σχηματισμούς για την ολοκλήρωση της αποστολής τους. Τα τακτικά μέσα επικοινωνιών συνήθως περιορίζονται σε μια συγκεκριμένη περιοχή στην οποία διεξάγονται επιχειρήσεις και χρησιμοποιούνται για τη διοίκηση και τον έλεγχο των εμπλεκόμενων δυνάμεων. Το σύστημα Link-11 χρησιμοποιείται για να παρέχει, υψηλής ταχύτητας, μεταφορά πληροφοριών από υπολογιστή σε υπολογιστή μεταξύ πλοίων, αεροσκαφών και εγκαταστάσεων. Σκοπός της εργασίας αυτής αποτελεί η υλοποίηση του συστήματος Link-11 προς όφελος των Ενόπλων Δυνάμεων, με τη χρήση της γλώσσας προγραμματισμού Java σε περιβάλλον δικτύου.
Αρχικά μελετάται το πρωτόκολλο του Link-11 και στη συνέχεια περιγράφονται τα εργαλεία που χρησιμοποιήθηκαν. Πραγματοποιούνται τροποποιήσεις με σκοπό τη λειτουργία του πρωτοκόλλου Link-11 σε διαδικτυακό περιβάλλον. Διεξάγονται οι κατάλληλες παραμετροποιήσεις και εξάγονται συμπεράσματα για την αποτελεσματικότητα υλοποίησής τους.
From Sommerfeld and Brillouin forerunners to optical precursors
Creators: name: Macke, Bruno
name: Ségard, Bernard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The Sommerfeld and Brillouin forerunners generated in a single-resonance absorbing medium by an incident step-modulated pulse are theoretically considered in the double limit where the susceptibility of the medium is weak and the resonance is narrow. Combining direct Laplace-Fourier integration and calculations by the saddle-point method, we establish an explicit analytical expression of the transmitted field valid at any time, even when the two forerunners significantly overlap. We examine how their complete overlapping, occurring for shorter propagation distances, originates the formation of the unique transient currently named resonant precursor or dynamical beat. We obtain an expression of this transient identical to that usually derived within the slowly varying envelope in spite of the initial discontinuity of the incident field envelope. The dynamical beats and 0Pi pulses generated by ultra-short incident pulses are also briefly examined
title: Σύγχρονες μέθοδοι επεξεργασίας ακουστικών σημάτων στη θάλασσα από συστοιχίες υδροφώνων
Creators: name: Παρασχος Δημητριος
Publisher: name: Technical University of Crete
Year: 2017

description: Sonar systems have been in practical use since the turn of the 20th century, and they are considered to be one of the most developed engineering systems. The main research subjects have concerned with detection and tracking tasks. In this work, the research is focused in the development of a signal processing algorithm, for passive sonar system, based on modern and intelligent methods. Each method has been briefly discussed as more details can be found through the references at the end.
Detection in passive sonar systems, is one of the most challenging areas in the military field. In passive sonar system, received noises with SNR as low as -15dB are very common at the receiver (Urick 1983). Generaly the challenge of sonar signal processing is to detect/classify targets with very weak noises as this is an important factor in modern naval battles. In addition to the long-range detection, primary advantages of passive sonar systems are the stealthy monitor and the low complexity together with low power consumption of the sensors. On this paper, the signal is being processed both in time and space (subspace methods). For space processing the DOA (Direction Of Arrival) reveals the energy peak in relation to scanning angle, allowing us to detect target position. For time processing, there are two methods applied. First of all, by downsampling, the recorded noise is being significantly reduced due to the fact that noise follows a random frequency distribution whereas signal does not. After that the overlapping of time windowed spectra, leads to an improvement of the initial lofargram that is being produced. Both simulated and real data’s are being processed and the result are quite promising.
title: Έλεγχος τηλεχειριζόμενου ρομποτικού οχήματος με τη βοήθεια κινητού τηλεφώνου (smartphone) ή φορητής συσκευής
Creators: name: Μποτωνης Δημητριος
Publisher: name: Technical University of Crete
Year: 2017

description: Η παρούσα μεταπτυχιακή διατριβή έχει ως στόχο την κατασκευή ενός μη
επανδρωμένου οχήματος το οποίο ελέγχεται με τηλεχειρισμό από φορητή συσκευή με λειτουργικό android (smartphone ή tablet) και θα μπορούσε να χρησιμοποιηθεί ως πλατφόρμα για τη διασύνδεση επιπλέον εξοπλισμού μελλοντικά. Η κατασκευή έχει στρατιωτικό προσανατολισμό. Αυτό σημαίνει ότι το όχημα, εκτός από απλό τον τηλεχειρισμό, πρέπει να είναι ικανό να εκτελέσει κάποιες απλές αυτόνομες λειτουργίες, όπως η αυτόνομη περιπολία, η παρακολούθηση ενός φάρου και εκτέλεση πορείας προς αυτόν (είτε βρίσκεται σταθερά σε ένα σημείο είτε κινείται) και να ενσωματώνει μια υποτυπώδη τεχνική αποφυγής εμποδίων, οι οποίες θεωρούνται ως βασικό υπόβαθρο για την εκτέλεση πολλαπλών μελλοντικών αποστολών. Τέλος, λόγω της αύξησης των επιχειρήσεων εντός κατοικημένων τόπων και κτιρίων, αποφασίστηκε το όχημα να κατασκευαστεί ως όχημα εσωτερικού χώρου.
Die Wasserburgen des 13. und 14. Jahrhunderts im Osten Niederösterreichs. Viereckanlagen nach dem Kastelltyp. Die Dreiseitburg als Sonderausbildung
Creators: name: Landgraf, August
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14, Nr. 1 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Additional file 1 of Global comparative transcriptomes uncover novel and population-specific gene expression in esophageal squamous cell carcinoma
Creators: name: Alotaibi, Amal
name: Gadekar, Veerendra P.
name: Gundla, Pranav Swaroop
name: Mandarthi, Sumana
name: Jayendra, Nidhi
name: Tungekar, Asna
name: Lavanya, B. V.
name: Bhagavath, Ashok Kumar
name: Cordero, Mary Anne Wong
name: Pitkaniemi, Janne
name: Niazi, Shaik Kalimulla
name: Upadhya, Raghavendra
name: Bepari, Asmatanzeem
name: Hebbar, Prashantha
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1 Fig. 1 Workflow followed in the data analysis. Fig. 2 QQ-plot showing observed versus theoretical quantiles of expression in all the 12 ESCC ‘normal vs tumor’ data-sets
Additional file 1 of Continuous process technology for bottom-up synthesis of soluble cello-oligosaccharides by immobilized cells co-expressing three saccharide phosphorylases
Creators: name: Schwaiger, Katharina N.
name: Nidetzky, Bernd
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Inorganic Chemistry

description: Additional file 1: Figure S1. Limitations of continuous COS production in a packed-bed reactor. (A) 3 to 5 mm particles before (left) and after COS production at 45 °C showing a whitish discoloration (right); (B) 0.25–2.00 mm sized particles in the swollen (30 °C; left) and shrunken (45 °C; right) state; (C) intact packed-bed reactor before (left) and broken reactor after (right) COS production. Figure S2. Free (left y-axis) and converted (COS-integrated; right y-axis) αGlc1-P in continuous (top) and batch (bottom) reaction with immobilized cells (37 and 74 mgCDW/gPAM, respectively). Figure S3. HPLC chromatograms of representative product solution (1st day of long-term continuous COS production). Mono- and disaccharides were measured with an YMC-Pack Polyamine II/S-5 µm/12 nm column (A) and oligosaccharides (cello-oligosaccharides G2 to G6) were measured with a Luna5 µm NH2 column (B). Table S1. Molar concentrations and overall activities of repetitive batch reactions with immobilized cell catalysts at 35 °C and 45 °C. Table S2. Activity ratio of enzymes in PAM-immobilized whole cells, measured at 30 °C. All activities were measured in synthesis direction (see “Enzyme activity measurements” section). Table S3. Representative molar mass balances of batch reaction (6 h) with immobilized cells (Fig. 3). Table S4. Representative molar mass balances of continuous reactionwith immobilized cells (Fig. 5A, sample from the 3rd day). Table S5. HPLC measurements of single COS species of three samples from continuous production shown in Figure 6A and C. Samples were measured with two separately prepared standard series (1 and 2) in the same concentration range (G3:50 to 5 mM, G4: 25 to 3 mM, G5: 10 to 1 mM, G6: 5 to 1 mM). Table S6. Representative molar mass balances (measured with a new LUNA-column) of continuous reaction with immobilized cells (Fig. 5B, sample from the 22nd day).
Data analysis quantitative method for the research on business optimization of CubeSat missions
Creators: name: FUNK, Philippe
Publisher: name: figshare
Year: 2022
Subjects: Space sciences not elsewhere classified
Other commerce, management, tourism and services not elsewhere classified
International business

description: This paper will use the quantitative research method of data analysis. This study will manipulate existing data using numerical methods. The review's research process comprised a straightforward course of examination readiness, gathering information, investigating the information, and distributing results to help the CubeSat people group further develop the likelihood of mission achievement. The strategy that will be applied in this proposed research involves assortment dependent on optional exploration where past investigations on the theme will be looked at, and the information will then, at that point, be dissected.
title: Empatia e relação no serviço social que desafios para a profissão?
Creators: name: Bracons Carneiro, Helia Augusta
Publisher: name: Universidade Lusíada Editora
Year: 2017

description: Intervenção social. - ISSN 0874-1611. - N. 49/50 (2017). - p. 135-144.
Die „Ottrotter Schlösser“. Teil 1: Die Lützelburg
Creators: name: Biller, Thomas
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14, Nr. 2 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
APPLICATION OF GAMIFICATION ELEMENTS IN NURSING ‎ADMINISTRATION COURSE AND ITS EFFECT ON NURSING ‎STUDENTS' KNOWLEDGE AND MANAGERIAL SKILLS
Creators: name: SHEREEN YWAKAIM ANDRAWES
name: SAMAH FAISAL FAKHRY
name: RABAB MAHMOUD HASSAN
Publisher: name: Zenodo
Year: 2023
Subjects: Gamification Elements, Nursing Students, Knowledge, Managerial Skills, Nursing Administration‏.‏

description: Abstract
Background: Gamification emerges as an effective teaching approach as it makes the activities perceived as boring and difficult for the learner fun, provides motivation, and makes the learning process more attractive. Aim of the study: To assess the effect of application of gamification elements in nursing administration course on nursing students' knowledge and managerial skills. Subjects and methods: This one-group quasi-experimental study was conducted at the Technical Nursing Institute in Abbasseya ‎Fevers Hospital in Cairo, Egypt included all available nursing students enrolled at the fifth year during the time of the study. Their total number was 70. Data collection tools consisted of a knowledge questionnaire and an observation checklist for managerial skills. Results: Students' age ranged between 19 and 22 years, 45.7% had previous experience with gamification. Satisfactory knowledge increased from 14.3% pre-intervention, to 100.0% at both post and follow-up phases (p<0.001). Adequate managerial skills rose from 0.0% pre-intervention to 80.0% and 82.9% at post and follow-up phases. The multivariate analysis identified the study intervention as a significant independent positive predictor of the knowledge and managerial skills scores. Conclusion and recommendations: The utilization of gamification elements is effective in improving nursing students' knowledge and skills' managerial skills related to the nursing administration. Using gamification elements should be included in the educational curriculum of nursing institutes. Further research is proposed to compare different types of gamified learning interventions on nursing students' psychomotor skills acquisition. ‎
Ein Nachtrag zur Abhandlung „Burgstall und Wale“ in „Burgen und Schlösser“ (13) 1972/11, S. 68/70
Creators: name: Kunstmann, Helmut
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14, Nr. 2 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
title: Project report NOAA Ship Oscar Elton Sette, Project Report SE-15-06
titleType: Other
Creators: name: United States. National Marine Fisheries Service
name: Pacific Islands Fisheries Science Center (U.S.)
Publisher: name: United States. National Marine Fisheries Service. Pacific Islands Fisheries Science Center (U.S.)
Year: 2015

description: PIFSC project report ; Project SE-15-06
Revisiting the Bragg reflector to illustrate some modern developments in optics
Creators: name: Horsley, S. A. R.
name: Wu, J. -H.
name: Artoni, M.
name: La Rocca, G. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A series of thin layers of alternating refractive index is known to make a good optical mirror over certain bands of frequency. Such a device - often termed the Bragg reflector - is usually introduced to students within the first years of an undergraduate degree, often in isolation from other parts of the course. Here we show that the basic physics of wave propagation through a stratified medium can be used to illustrate some more modern developments in optics as well as quantum physics; from transfer matrix techniques, to the optical properties of cold trapped atoms, optomechanical cooling, and a simple example of a system exhibiting an appreciable level of optical non-reciprocity.
description: 24 pages, 9 figures
title: ECDSA: η ψηφιακή υπογραφή της NSA
Creators: name: Σερετιδης Αναστασιος
Publisher: name: Technical University of Crete
Year: 2017

description: Ο Αλγόριθμος Ψηφιακής Υπογραφής Ελλειπτικής Καμπύλης (ECDSA) είναι ένα ευρέως γνωστό σχήμα ψηφιακής υπογραφής, το οποίο χρησιμοποιείται από μεγάλους οργανισμούς, συμπεριλαμβανομένης της Υπηρεσίας Εθνικής Ασφάλειας (NSA) των ΗΠΑ, για την πιστοποίηση της προέλευσης των διακινούμενων δεδομένων. Ο μηχανισμός λειτουργίας της αυθεντικότητας των μηνυμάτων που υπογράφονται με το σχήμα αυτό, συνδυάζει ιστορικά δυσεπίλυτα μαθηματικά προβλήματα, που πέρα από την αισθητική τους αξία, καθιστούν τον όρο «ψηφιακή υπογραφή» ένα από τα σημαντικότερα επιτεύγματα της επιστήμης υπολογιστών. Ο ευαίσθητος τομέας της ασφάλειας της πληροφορίας τόσο στην διεξαγωγή στρατιωτικών επιχειρήσεων όσο και στην προστασία των προσωπικών δεδομένων των πολιτών, οδήγησε αναμφίβολα πολλούς ερευνητές, στην προσπάθεια δημιουργίας ψηφιακών υπογραφών στις οποίες η πλαστογράφηση να φαντάζει αδύνατη. Η επίτευξη αυτή, συνάδει με την απόδειξη της μη ύπαρξης λύσεων στα προαναφερόμενα δυσεπίλυτα προβλήματα, η οποία δεν έχει παρατηρηθεί μέχρι σήμερα. Κατ’ αυτή την έννοια, οποιοσδήποτε μηχανισμός ψηφιακής υπογραφής μπορεί θεωρητικά να παραβιαστεί πλήρως και ανά πάσα στιγμή. Στην παρούσα διπλωματική εργασία, αναλύεται το αναγκαίο θεωρητικό υπόβαθρο πάνω στο οποίο στηρίζεται η δομή των εκδοχών και το πρωτόκολλο χρήσης του ECDSA. Περιγράφεται η λειτουργία των συναρτήσεων συμπύκνωσης ενός μηνύματος καθώς και ο καθοριστικός ρόλος των ελλειπτικών καμπυλών πάνω στην ασφάλεια του σχήματος της υπογραφής. Κατόπιν, εισάγονται οι τεχνικές της άλγεβρας των δικτυωτών και περιγράφονται κρυπταναλυτικές επιθέσεις κατά του ECDSA με την χρήση αυτών των τεχνικών, τόσο θεωρητικά όσο και πρακτικά, με την χρήση της γλώσσας προγραμματισμού Python. Ολοκληρώνοντας, αναπτύσσονται ο κώδικας με τον οποίο υπογράφεται και επαληθεύεται ένα
μήνυμα και μελετώνται νέες επιθέσεις.
title: Design and implementation of the functional architecture and ROS-based control/logic software for the "Brasidas" UGS
Creators: name: Μακρης Δημητριος
Publisher: name: Technical University of Crete
Year: 2017

description: This thesis presents work done as part of the "Brasidas" Unmanned Ground System (UGS) project. The project aims to design and manufacture a prototype unmanned autonomous ground vehicle (codenamed "Brasidas") for outdoors operations, capable of both autonomous and remote operation. The platform will be configurable over a wide range of missions and with varying operational payloads selectable by the user. The initial design concept intended for a patrol and observation robot, with capabilities similar to those of the TALON SWORDS vehicle, being in addition able to operate autonomously.
Herein will be described the initial analysis and design of the "Brasidas" functional architecture, as well as its evolution over time during the project's development, to the current state it stands at today. The initial design concept will be explained, we will attempt to justify the objectives we were aiming for, and the problems we encountered on the way. The solutions we selected and implemented will also be analyzed and described in detail.
Additional file 1 of A novel chondrocyte sheet fabrication using human-induced pluripotent stem cell-derived expandable limb-bud mesenchymal cells
Creators: name: Takao, Tomoka
name: Sato, Masato
name: Fujisawa, Yuki
name: Toyoda, Eriko
name: Yamada, Daisuke
name: Hitsumoto, Yukio
name: Nakata, Eiji
name: Ozaki, Toshifumi
name: Takarada, Takeshi
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Supplemental materials and methods.
Particle shape dependence in 2D granular media
Creators: name: Saint-Cyr, B.
name: Szarf, K.
name: Voivret, C.
name: Azéma, E.
name: Richefeu, V.
name: Delenne, J. -Y.
name: Combe, G.
name: Nouguier-Lehon, C.
name: Villard, P.
name: Sornay, P.
name: Chaze, M.
name: Radjaï, F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Particle shape is a key to the space-filling and strength properties of granular matter. We consider a shape parameter $η$ describing the degree of distortion from a perfectly spherical shape. Encompassing most specific shape characteristics such as elongation, angularity and nonconvexity, $η$ is a low-order but generic parameter that we used in a numerical benchmark test for a systematic investigation of shape-dependence in sheared granular packings composed of particles of different shapes. We find that the shear strength is an increasing function of $η$ with nearly the same trend for all shapes, the differences appearing thus to be of second order compared to $η$. We also observe a nontrivial behavior of packing fraction which, for all our simulated shapes, increases with $η$ from the random close packing fraction for disks, reaches a peak considerably higher than that for disks, and subsequently declines as $η$ is further increased. These findings suggest that a low-order description of particle shape accounts for the principal trends of packing fraction and shear strength. Hence, the effect of second-order shape parameters may be investigated by considering different shapes at the same level of $η$.
description: 5 pages, 8 figures
Classical and quantum Hořava-Lifshitz cosmology in a minisuperspace perspective
Creators: name: Vakili, B.
name: Kord, V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the classical and quantum models of a Friedmann-Robertson-Walker (FRW) cosmology in the framework of the gravity theory proposed by Hořava, the so-called Hořava-Lifshitz theory of gravity. Beginning with the ADM representation of the action corresponding to this model, we construct the Lagrangian in terms of the minisuperspace variables and show that in comparison with the usual Einstein-Hilbert gravity, there are some correction terms coming from the Hořava theory. Either in the matter free or in the case when the considered universe is filled with a perfect fluid, the exact solutions to the classical field equations are obtained for the flat, closed and open FRW model and some discussions about their possible singularities are presented. We then deal with the quantization of the model in the context of the Wheeler-DeWitt approach of quantum cosmology to find the cosmological wave function. We use the resulting wave functions to investigate the possibility of the avoidance of classical singularities due to quantum effects.
description: 15 pages, 12 figures. revised version. arXiv admin note: substantial text overlap with arXiv:1204.1456
title: Πειραματική διερεύνηση της φθοράς ελεύθερης επιφάνειας κοπτικού εργαλείου κατά την τόρνευση
Creators: name: Δαριβιανακης Μιχαηλ
Publisher: name: Technical University of Crete
Year: 2017

description: Η μελέτη των συνθηκών κοπής με σκοπό την ελαχιστοποίηση της φθοράς των κοπτικών εργαλείων αποτελεί σημαντικό πεδίο έρευνας καθώς το 3%-12% του συνολικού κόστους παραγωγής των βιομηχανικών προϊόντων άφορα το κόστος των κοπτικών εργαλείων. Ταυτόχρονα το 20% του μη παραγωγικού χρόνου των εργαλειομηχανών έχει να κάνει με την αστοχία των κοπτικών εργαλείων. Έτσι, η διερεύνηση της επίδρασης των συνθηκών κοπής στην ανάπτυξη φθοράς στα κοπτικά εργαλεία, είναι αναγκαία για την ελαχιστοποίηση του κόστους και του χρόνου παραγωγής με τη βέλτιστη παραγωγικότητα και διάρκεια ζωής των εργαλείων.

Η φθορά των κοπτικών εργαλείων επηρεάζει δραματικά τη διάρκεια ζωής τους όταν κατά τη κατεργασία δεν επικρατούν οι κατάλληλες συνθήκες κοπής. Βασικό κριτήριο αστοχίας των κοπτικών εργαλείων αποτελεί το πλάτος ζώνης φθοράς στην ελεύθερη επιφάνεια, αφού όταν ξεπεράσει μια καθορισμένη τιμή το εργαλείο κρίνεται ακατάλληλο για περαιτέρω χρήση και αποσύρεται.

Στη παρούσα εργασία πραγματοποιούνται πειράματα φθοράς καρβιδίων βολφραμίου-κοβαλτίου κατά τη τόρνευση κράματος αλουμινίου Al 7075. Τα πειράματα πραγματοποιήθηκαν για διαφορές ταχύτητες κοπής υπό σταθερή πρόωση, βάθος κοπής και χρόνο κατεργασίας, ώστε να διερευνηθεί η επίδραση της ταχύτητας κοπής στην ανάπτυξη του πλάτους ζώνης φθοράς στην επιφάνεια ελευθερίας.

Η φθορά για κάθε κοπτικό εργαλείο μετρήθηκε μέσω στερεομικροσκοπίου και από τα αποτελέσματα δημιουργήθηκε διάγραμμα για την ανάπτυξη του πλάτους ζώνης φθοράς καθώς η ταχύτητα αυξάνεται. Στόχος η επιβεβαίωση προτύπων πειραμάτων που συμπεραίνουν ότι το πλάτος ζώνης φθοράς δε μεταβάλλεται γραμμικά κατά την αύξηση της ταχυτητας λόγω των μηχανισμών φθοράς που ενεργοποιούνται κάθε φορά.
title: Επιστημονικοί υπολογισμοί τεχνικών cyclic reduction για hermite collocation πεπερασμένα στοιχεία

title: Cyclic reduction scientific computations for hermite collocation finite elements
Creators: name: Ελευθεριου Νικολαος
Publisher: name: Technical University of Crete
Year: 2017

description: Η αριθμητική μέθοδος Πεπερασμένων Στοιχείων Collocation, για την επίλυση Προβλημάτων Συνοριακών Τιμών με τη χρήση ως συναρτήσεις βάσης των κυβικών πολυωνύμων Hermite, αποτελεί ένα προσεγγιστικό σχήμα με υψηλή τάξη ακρίβειας. Αντικείμενο της παρούσας διατριβής είναι η εφαρμογή της μεθόδου για ρεαλιστικές εφαρμογές, στις οποίες απαιτούνται υλοποιήσεις σε υπολογιστικές αρχιτεκτονικές υψηλών επιδόσεων. Αυτό συμβαίνει εξαιτίας της δομής και της διάστασης του παραγόμενου αλγεβρικού συστήματος εξισώσεων, του οποίου η αποδοτική διαδικασία της επίλυσης χρειάζεται να λάβει υπόψη τις παράλληλες ιδιότητες του πίνακα συντελεστών. Σε ένα σημαντικό μέρος των υπολογισμών εμπλέκονται επιλύσεις βασικών γραμμικών συστημάτων, των οποίων οι πίνακες συντελεστών έχουν block τριδιαγώνια μορφή. Στα σύγχρονα υπολογιστικά περιβάλλοντα πολλαπλών πυρήνων, τα οποία διαθέτουν και επιταχυντές υπολογισμών, οι άμεσες κλασσικές σειριακές διαδικασίες επίλυσης χρειάζεται να αντικατασταθούν με τεχνικές Cyclic Reduction, ώστε να είναι εφικτή η ταυτόχρονη πραγματοποίηση υπολογισμών από μεγαλύτερο αριθμό υπολογιστικών πυρήνων. Με αυτό τον τρόπο η επαναληπτική διαδικασία επίλυσης των Collocation γραμμικών συστημάτων μπορεί να πραγματοποιηθεί αποδοτικά, βασισμένη σε υλοποιήσεις κατάλληλων αλγορίθμων με υψηλό βαθμό παράλληλων διαδικασιών. Αυτό έχει ως άμεση συνέπεια την επίλυση συστημάτων μεγάλης διάστασης τα οποία αντιστοιχούν σε προβλήματα υψηλών διακριτοποιήσεων, τριών διαστάσεων με τη χρήση των σύγχρονων υπολογιστικών αρχιτεκτονικών πολλαπλών πυρήνων.
Errichtung eines burgenkundlichen Museums in Alt-Kainach
Creators: name: Pfeifer, Egon
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14, Nr. 2 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
title: Στατική ανάλυση προβλήματος κάμψης σε τετραγωνική πλάκα
Creators: name: Μανουσος Χριστος-Παναγιωτης
Publisher: name: Technical University of Crete
Year: 2017

description: Στην εργασία πραγματοποιείται στατική ανάλυση μέσω χρήσης προγράμματος Matlab mathworks. Η ανάλυση αναπτύσσεται σε τετραγωνική πλάκα με τη μέθοδο του Mindlin.
Geschichte des Hauses Aden
Creators: name: Litzinger, Martin
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 15, Nr. 1 (1974): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Grusswort zur 75-Jahrfeier der Deutschen Burgenvereinigung
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 15, Nr. 2 (1974): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Lecture notes in population genetics
Creators: name: Holsinger, Kent
Publisher: name: figshare
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology

description: Lecture notes from my graduate course in population genetics. Topics covered include basic principles of Hardy-Weinberg, population structure, drift, mutation, selection, quantitatitve genetics, molecular evolution, and phylogeography. Please contact me if you find errors or places where the explanations are unclear or incomplete. The first link below will take you to the course website. The second will take you to a Github repository in which you'll find the LaTeX source and associated files needed to produce the PDF that you find here. The notes are from the 2019 edition of the course.The final link is to the release page on Github. There you'll find links to the most recent version of the notes (v3.0) that will provide a ZIP file (or a gzipped tar ball) of the files used to produce this PDF.
If you are interested in the notes as they existed at the end of Spring 2017 or Fall 2012, you can also download v2.0 or v1.0, respectively.If you find errors in the notes, please let me know.
Die Nürnberger Stadtmauer im heutigen Grossstadtverkehr
Creators: name: Clauß, Harald
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 17, Nr. 1 (1976): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Inhalt des Heftes 1977/I
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 18, Nr. 1 (1977): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Die Stauffenburg bei Gittelde am Harz
Creators: name: Trinks, Rüdiger
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 18, Nr. 1 (1977): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Additional file 1 of Experiences of service transitions in Australian early intervention psychosis services: a qualitative study with young people and their supporters
Creators: name: Milton, Alyssa
name: Powell, Tacita
name: Conn, Katrina
name: Einboden, Rochelle
name: Buus, Niels
name: Glozier, Nicholas
Publisher: name: figshare
Year: 2023
Subjects: subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1: SupplementaryFile 1. COREQ checklist. SupplementaryFile 2. Interview Guide for Young People. SupplementaryFile 3. Interview Guide for Support People. Supplementary File 4. EIPS factors that could improve thehospitalisation experience and its effectiveness – Views of Young People andSupport People.
Relaxation time in a non-conserving driven-diffusive system with parallel dynamics
Creators: name: Masharian, S. R.
name: Jafarpour, F. H.
name: Aghamohammadi, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We introduce a two-state non-conserving driven-diffusive system in one-dimension under a discrete-time updating scheme. We show that the steady-state of the system can be obtained using a matrix product approach. On the other hand, the steady-state of the system can be expressed in terms of a linear superposition Bernoulli shock measures with random walk dynamics. The dynamics of a shock position is studied in detail. The spectrum of the transfer matrix and the relaxation times to the steady-state have also been studied in the large-system-size limit.
description: 10 pages
A first for Europeana: daguerreotypes in 3D
Creators: name: Hernández, Marc
name: Iglésias, David
name: Taes, Sofie
Publisher: name: Zenodo
Year: 2022

description: The Centre for Image Research & Diffusion (CRDI), Girona owns a large and diverse photography archive that reflects daily life in the region of Girona, Catalonia over the past two centuries. In 2022, CRDI digitised 99 items from its collection of daguerreotypes, the first form of photography created in France 1839, in 3D and aggregated them to Europeana: an important achievement not only for the project, but for professionals in the field of photography at large. 3D digitization in photogrammetry is a stable and widely used technique, however, due to the specific characteristics of the daguerreotypes, the process posed challenges in order to get the best visual results. Handling these challenges required experiments and technical solutions to be deployed. Following the work done, a case study was recently developed for WEAVE project to share the lessons learnt and the knowledge generated by this activity. Digitizing daguerreotypes has required specific research and a series of iterations through a pre-testing process. Photogrammetry was applied putting to best use its advantages while trying to subvert its limitations. This document and activity were realized in the context of project WEAVE, co-financed by the European Union under the Connecting Europe Facility (CEF) Programme
Diffusion of photoexcited carriers in graphene
Creators: name: Vasko, F. T.
name: Mitin, V. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The diffusion of electron-hole pairs, which are excited in an intrinsic graphene by the ultrashort focused laser pulse in mid-IR or visible spectral region, is described for the cases of peak-like or spread over the passive region distributions of carriers. The spatio-temporal transient optical response on a high-frequency probe beam appears to be strongly dependent on the regime of diffusion and can be used for verification of the elasic relaxation mechanism. Sign flip of the differential transmission coefficient takes place due to interplay of the carrier-induced contribution and weak dynamic conductivity of undoped graphene.
description: 4 pages, 4 figures
Inhalt des Heftes 1973/I
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14, Nr. 1 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Additional file 1 of Comparison of response evaluation criteria in solid tumors and tumor regression grade in evaluating the effect of preoperative systemic therapy of gastric cancer
Creators: name: Lai, Ming-Yu
name: Kang, Shi-Yang
name: Sun, Yu-Ting
name: Quan, Ting-Ting
name: Lu, Shi-Xun
name: He, Cai-Yun
name: Zhou, Zhi-Wei
name: Yang, Li-Qiong
name: Luo, Hui-Yan
name: Wang, Feng-Hua
name: Li, Yu-Hong
name: Xu, Rui-Hua
name: Guan, Wen-Long
name: Qiu, Miao-Zhen
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Cancer

description: Additional file 1.
Analytic non-abelian Hodge theory
Creators: name: Pridham, J. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: The pro-algebraic fundamental group can be understood as a completion with respect to finite-dimensional non-commutative algebras. We introduce finer invariants by looking at completions with respect to Banach and C*-algebras, from which we can recover analytic and topological representation spaces, respectively. For a compact Kaehler manifold, the C*-completion also gives the natural setting for non-abelian Hodge theory; it has a pure Hodge structure, in the form of a pro-C*-dynamical system. Its representations are pluriharmonic local systems in Hilbert spaces, and we study their cohomology, giving a principle of two types, and splittings of the Hodge and twistor structures.
description: 47 pp. v2 m-convex hypotheses added, final version, to appear in Geometry and Topology; v3 minor correction
Retrofitted Natural Supersymmetry from a U(1)
Creators: name: Hardy, Edward
name: March-Russell, John
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose that a single, spontaneously broken, U(1) gauge symmetry may be responsible for suppressing both the first two generation Yukawa couplings, and also, in a correlated manner, parameters in the dynamical supersymmetry (SUSY) breaking sector by the mechanism of retrofitting. In the dynamical SUSY breaking sector, these small parameters are typically required in order to introduce R-symmetry breaking in a controlled manner and obtain phenomenologically viable meta-stable vacua. The heavy U(1) multiplet mediates a dominant contribution to the first two generation MSSM sfermion soft masses, while gauge mediation provides a parametrically suppressed soft term contribution to the stop and most other states, so realising a natural SUSY spectrum in a fashion consistent with SUSY unification. In explicit models the spectra obtained can be such that current LHC limits are evaded, and predictions of flavour changing processes are consistent with observation. We examine both implementations with low scale mediation, and string-motivated examples where the U(1) is anomalous before the inclusion of a generalised Green-Schwarz mechanism.
description: V2: References added
Zum Geleit
Creators: name: Lüttichau-Bärenstein, Hannibal Von
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14, Nr. 1 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Measured Radiation and Background Levels During Transmission of Megawatt Electron Beams Through Millimeter Apertures
Creators: name: Alarcon, R.
name: Balascuta, S.
name: Benson, S. V.
name: Bertozzi, W.
name: Boyce, J. R.
name: Cowan, R.
name: Douglas, D.
name: Evtushenko, P.
name: Fisher, P.
name: Ihloff, E.
name: Kalantarians, N.
name: Kelleher, A.
name: Kossler, W. J.
name: Legg, R.
name: Long, E.
name: Milner, R. G.
name: Neil, G. R.
name: Ou, L.
name: Schmookler, B.
name: Tennant, C.
name: Tschalaer, C.
name: Williams, G. P.
name: Zhang, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We report measurements of photon and neutron radiation levels observed while transmitting a 0.43 MW electron beam through millimeter-sized apertures and during beam-off, but accelerating gradient RF-on, operation. These measurements were conducted at the Free-Electron Laser (FEL) facility of the Jefferson National Accelerator Laboratory (JLab) using a 100 MeV electron beam from an energy-recovery linear accelerator. The beam was directed successively through 6 mm, 4 mm, and 2 mm diameter apertures of length 127 mm in aluminum at a maximum current of 4.3 mA (430 kW beam power). This study was conducted to characterize radiation levels for experiments that need to operate in this environment, such as the proposed DarkLight Experiment. We find that sustained transmission of a 430 kW continuous-wave (CW) beam through a 2 mm aperture is feasible with manageable beam-related backgrounds. We also find that during beam-off, RF-on operation, multipactoring inside the niobium cavities of the accelerator cryomodules is the primary source of ambient radiation when the machine is tuned for 130 MeV operation.
description: 9 pages, 11 figures, submitted to Nuclear Instruments and Methods in Physics Research Section A
Additional file 16 of Comparative analysis of full-length transcriptomes based on hybrid population reveals regulatory mechanisms of anthocyanin biosynthesis in sweet potato (Ipomoea batatas (L.) Lam)
Creators: name: Qin, Zhen
name: Hou, Fuyun
name: Li, Aixian
name: Dong, Shuxu
name: Huang, Chengxing
name: Wang, Qingmei
name: Zhang, Liming
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 16: Figure S10. The most enriched GO terms of the turquoise module.
Inhalt des Heftes 1973/II
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2017

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14, Nr. 2 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Disk and elliptical galaxies within renormalization group improved gravity
Creators: name: Rodrigues, Davi C.
name: de Oliveira, Paulo L. C.
name: Fabris, Julio C.
name: Shapiro, Ilya L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The paper is about possible effects of infrared quantum contributions to General Relativity on disk and elliptical galaxies. The Renormalization Group corrected General Relativity (RGGR model) is used to parametrize these quantum effects. The new RGGR results presented here concern the elliptical galaxy NGC 4374 and the dwarf disk galaxy DDO 47. Using the effective approach to Quantum Field Theory in curved background, one can argue that the proper RG energy scale, in the weak field limit, should be related to the Newtonian potential. In the context of galaxies, this led to a remarkably small variation of the gravitational coupling G, while also capable of generating galaxy rotation and dispersion curves of similar quality to the the best dark matter profiles (i.e., the profiles that have a core).
description: 5 pages. This paper is based on a talk given by D.C. Rodrigues at the I CosmoSul meeting (Rio de Janeiro, RJ - Brazil. August, 01-05, 2011). To be published in AIP conference Proceedings
ASSOCIATION OF MELATONIN SECRETION IN NIGHT SHIFT HEALTHCARE WORKERS IN A TERTIARY CARE HOSPITAL IN WESTERN UTTAR PRADESH
Creators: name: ABHIGYA VARMA
name: THURAYA ADULSALAM.A.AL-AZAZI
name: MANOJ KUMARNANDKEOLIAR
name: BHASKAR CHARANA KABI
name: NIRUPMA GUPTA
name: JASMEEN GUPTA
name: RAJESH KUMAR THAKUR
Publisher: name: Zenodo
Year: 2023
Subjects: Melatonin, Shift Work, Healthcare Workers, ELISA

description: Abstract 
Introduction: The pineal gland is positioned in the hypothalamus of the brain and it is influenced by the level of exposure to light. Melatonin secretion exhibits a diurnal rhythm, its level rises sharply 3-5 hours after sleep. Night shift work has been found to expose individuals to several elements that can potentially disrupt the circadian physiological mechanism. Insufficient sleep as well as sleep disorders resulting from shift work, have been linked to adverse impacts on hormonal regulation and an increase in energy balance. Aim: To find association between melatonin secretion in night shift and day shift healthcare workers in a tertiary care Hospital in Western UP Materials and Methods: Blood Samples of night shift and day shift healthcare workers were collected and melatonin levels were estimated in the plasma using ELISA. Anthropometry measurements like weight and height were also measured. Results: Insignificant variations in the melatonin levels between night shift and day shift healthcare workers were observed. Conclusion: Insignificant variations in the melatonin levels between night shift and day shift healthcare workers were observed. There is no correlation of melatonin with BMI and age in both case and control study groups.  It can be concluded from this study, that melatonin levels do not vary according to the time of shift and duration of sleep at night.