90 research outputs found
INTERRELATIONS BETWEEN MANDIBULAR PARAMETERS, AGE AND CARCASS IN FEMALE FALLOW DEER (DAMA DAMA)
The study material included 152 mandibles of female fallow deer aged 3 to 12. Each mandible was characterized by 15 measurements. Based on the Principal Components Analysis it
was concluded that the size and dimensional constitution of the mandible change with age.
The following parameters are subjected to most significant changes: total length, middle height of the ramus. Additionally, the method indicated that there is a moderate interdependency between the mandibular parameters and an eviscerated carcass mass. Pearsonâs correlation coefficient allowed for determining moderate correlations between the carcass mass, mandible total length, breadth of the third molar and middle height of the ramus
Arbitrary waveform generator for charge-pumping, Journal of Telecommunications and Information Technology, 2007, nr 3
The paper presents a new signal generator for charge-pumping. Modular structure of the generator is discussed with special emphasis on signal-generation module consisting of five independent signal channels. Digital signal synthesis is chosen to minimize inaccuracies. Noise analysis is performed to demonstrate the validity of the design of signal channel. Calibration procedure is also discussed
Effects of Short-Term Storage Method on Moisture Loss and Weight Change in Beech Timber
Timber harvested from fresh-felled trees has high moisture content and relatively high mass. During storage, the timber dries out and its weight decreases with the loss of moisture. The main objective of this study was to determine how the method and conditions of short-storage in summer affect weight changes and moisture loss in beech timber (not used for fuel). The study was carried out in a stand located in the north-eastern part of the range of beech. The age of the studied stand was 47 years. A total of 60 model trees were selected and divided into two groups. In the first group, 30 whole trees (WT) were left in the stand after felling. In the second group, 30 trees (CT) were delimbed and crosscut, and trunk sections (logs) were obtained (2.5 m). The timber (CT) was stored in a pile, and the weight of each log was measured daily. After 14 days, the trees from the first group, which had been left in the stand (WT), were delimbed and the trunks were cut into 2.5 m sections and weighed. It was assumed that timber intended for mechanical processing is stored in the forest for a short period of time, unlike energy wood. Therefore, the period of storage was not longer than two weeks. A more effective method of drying is to leave whole trees after felling, called transpirational drying. The timber stored in a pile (CT) lost moisture more slowly than the timber from trees that had been left whole after felling (WT). Comparing the weights of the logs stored in a pile, on days after harvesting, a statistically significant difference was found only between the first and the last day. It can be concluded that two weeks is the minimum period of storage in a pile (CT) required to obtain a significant degree of weight change and moisture loss
Echocardiographic assessment of tricuspid regurgitation and pericardial effusion after cardiac device implantation
Background: The frequency of cardiac implantable electronic device (CIED) implantations is constantly increasing. Pericardial effusion (PE) and tricuspid regurgitation (TR) may occur after CIED implantation. The aim of the present study is to evaluate the prevalence and risk factors for new occurrences or progression of TR and PE early after CIED implantation.
Methods: This is an on-going, single-center, observational study of patients after their first CIED implantation, with an echocardiographic evaluation within 60 days before and 7 days after the procedure. Data are presented for first 110 consecutive patients who underwent CIED implantation from August 2015 to July 2016.
Results: Median age was 75 years, and 44% were women. In total, 87 (79%) pacemakers, 21 (19%) implantable cardioverter-defibrillators and 2 cardiac resynchronization therapy devices were implanted. After CIED implantation, there was TR progression in 17 (16%) patients: 5 patients developed moderate TR, none developed severe TR. An increase in TR was more often observed after implantations performed by operators in training than by certified operators (35% vs. 12%, p = 0.02). New PE after the procedure was observed in 8 (7%) patients and was trivial ( < 5 mm) in all cases. Patients with new PE after implantation had lower baseline hemoglobin levels and tended to be women.
Conclusions: New PE and an increase in TR severity are rare complications early after CIED implantation. Operator experience might be related to TR progression. Increasing the number of patients in the current on-going study will allow a more reliable assessment of the prevalence and risk factors of these complications
Summary of the 3rd IAEA technicalmeeting on divertor concepts
This report summarizes the contributions presented at the 3rd IAEA technical meeting on divertor concepts, held in Vienna, Austria, 4â7 November 2019. The meeting brought together more than 70 experts from nuclear fusion research sites worldwide to discuss the different aspects that the divertor design and fusion machine operation involve, from ITER divertor developments to innovative technologies for future DEMO divertor. The main topics of the meeting were: divertor and confinement; radiative power exhaust; scrape-off layer (SOL) and divertor physics; steady state operation and transient heat loads; plasma facing components materials and heat exhaust for steady state operation; and divertors for DEMO and future power reactors
Interfacial Dzyaloshinskii-Moriya interaction in epitaxial W/Co/Pt multilayers
Dzyaloshinskii-Moriya interaction (DMI) manifesting in asymmetric layered
ferromagnetic films gives rise to non-colinear spin structures stabilizing
magnetization configurations with nontrivial topology. In this work
magnetization reversal, domain structure, and strength of DMI are related with
the structure of W/Co/Pt multilayers grown by molecular beam epitaxy. Applied
growth method enables fabrication of layered systems with higher crystalline
quality than commonly applied sputtering techniques. As a result, a high value
of D coefficient was determined from the aligned magnetic domain stripe
structure, substantially exceeding 2 mJ/m2. The highest value of DMI value
D = 2.64mj/m2 and strength of surface DMI parameter DS = 1.83pJ/m for
N=10 has been observed. Experimental results coincide precisely with those
obtained from structure based micromagnetic modelling and density functional
theory calculations performed for well-defined layered stacks. This high value
of DMI strength originates from dominating contributions of the interfacial
atomic Co layers and additive character from both interface types
Populist Discourse in the Polish Media
Grant MNiSW Narodowy Program Rozwoju Humanistyki (nr 0131/NPRH4/H2b/83/2016
Real-time detection of overloads on the plasma-facing components of Wendelstein 7-X
Wendelstein 7-X (W7-X) is the leading experiment on the path of demonstrating that stellarators are a feasible concept for a future power plant. One of its major goals is to prove quasi-steady-state operation in a reactor-relevant parameter regime. The surveillance and protection of the water-cooled plasma-facing components (PFCs) against overheating is fundamental to guarantee a safe steady-state high-heat-flux operation. The system has to detect thermal events in real-time and timely interrupt operation if it detects a critical event. The fast reaction times required to prevent damage to the device make it imperative to automate fully the image analysis algorithms. During the past operational phases, W7-X was equipped with inertially cooled test divertor units and the system still required manual supervision. With the experience gained, we have designed a new real-time PFC protection system based on image processing techniques. It uses a precise registration of the entire field of view against the CAD model to determine the temperature limits and thermal properties of the different PFCs. Instead of reacting when the temperature limits are breached in certain regions of interest, the system predicts when an overload will occur based on a heat flux estimation, triggering the interlock system in advance to compensate for the system delay. To conclude, we present our research roadmap towards a feedback control system of thermal loads to prevent unnecessary plasma interruptions in long high-performance plasmas.This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014â2018 and 2019â2020 under grant agreement No 633053.Peer ReviewedArticle signat per 22 autors/es:
Aleix Puig Sitjes* 1, Marcin Jakubowski 1, Dirk Naujoks 1, Yu Gao 1, Peter Drewelow 1, Holger Niemann 1, Joris Fellinger 1, Victor Moncada 2, Fabio Pisano 3, Chakib Belafdil 2,
Raphael Mitteau 2, Marie-HĂ©lĂšne Aumeunier 2, Barbara Cannas 3, Josep Ramon Casas 4, Philippe Salembier 4, Rocco Clemente 4, Simon Fischer 1, Axel Winter 1, Heike Laqua 1, Torsten Bluhm 1, Karsten Brandt 1, and The W7-X Team â
1. Max-Planck-Institut fĂŒr Plasmaphysik, Wendelsteinstr. 1, 17491 Greifswald, Germany / 2. Commissariat Ă lâĂnergie Atomique et aux Ănergies Alternatives (CEA), Institut de Recherche sur la Fusion par Confinement MagnĂ©tique (IRFM), F-13108 Saint Paul-lez-Durance, France / 3. Department of Electrical and Electronic Engineering, University of Cagliari (UniCa), Piazza dâArmi, 09126 Cagliari, Italy / 4. Department of Signal Theory and Communications, Universitat PolitĂšcnica de Catalunya (UPC), Jordi Girona 1-3, 08034 Barcelona, Spain / * Author to whom correspondence should be addressed. / â Membership of the Team Name is provided in Acknowledgments.Postprint (published version
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