cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optical amplifier based on guided polaritons in GaN and ZnO
Creators: name: Solnyshkov, D. D.
name: Terças, H.
name: Malpuech, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a scheme of an optical amplifier based on GaN and ZnO waveguides operating in the regime of strong coupling between photonic modes and excitonic resonances. Amplification of the guided exciton-polaritons is obtained by stimulated scattering from the excitonic reservoir, which is found to be fast enough compared with the large velocity of the guided polariton modes. We analyze the device parameters at different temperatures. We find that an 80 $μ$m-long amplifier can provide a gain of 10dB at room temperature, being supplied by 5 mA current in the $cw$ regime.
title: Θερμική άνεση σε υπαίθριους χώρους: πρόταση ενεργειακά αυτόνομης στάσης
titleType: AlternativeTitle
Creators: name: Παπανικολάου, Ελένη
Publisher: name: University of Thessaly
Year: 2010
Subjects: subject: ΕΝΕΡΓΕΙΑΚΑ ΣΥΣΤΗΜΑΤΑ -- ΣΧΕΔΙΑΣΜΟΣ
subject: ΑΝΑΝΕΩΣΙΜΕΣ ΠΗΓΕΣ ΕΝΕΡΓΕΙΑΣ
subject: ΦΩΤΟΒΟΛΤΑΪΚΑ ΣΤΟΙΧΕΙΑ

description: Σημείωση έκδοσης: διατίθεται ολοκληρωμένο το υλικό όπως παραδόθηκε από τη δημιουργό/συγγραφέα.
Sonnenfleckenzeichnung Nr. 106.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 07.05.1987, 06:45, erstellt von Michele Bianda, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 1.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sublattice asymmetry of impurity doping in graphene: A review
Creators: name: Lawlor, James A.
name: Ferreira, Mauro S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this review we highlight recent theoretical and experimental work on sublattice asymmetric doping of impurities in graphene, with a focus on substitutional Nitrogen dopants. It is well known that one current limitation of graphene in regards to its use in electronics is that in its ordinary state it exhibits no band gap. By doping one of its two sublattices preferentially it is possible to not only open such a gap, which can furthermore be tuned through control of the dopant concentration, but in theory produce quasi-ballistic transport of electrons in the undoped sublattice, both important qualities for any graphene device to be used competetively in future technology. We outline current experimental techniques for synthesis of such graphene monolayers and detail theoretical efforts to explain the mechanisms responsible for the effect, before suggesting future research directions in this nascent field.
description: 20 pages, 4 figures. Accepted for publication in Beilstein Journal of Nanotechnology
Analytic approximations of scattering effects on beam chromaticity in 21-cm global experiments
Creators: name: Rogers, Alan E. E.
name: Barrett, John P.
name: Bowman, Judd D.
name: Cappallo, Rigel
name: Lonsdale, Colin J.
name: Mahesh, Nivedita
name: Monsalve, Raul A.
name: Murray, Steven G.
name: Sims, Peter H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Scattering from objects near an antenna produce correlated signals from strong compact radio sources in a manner similar to those used by the Sea Interferometer to measure the radio source positions using the fine frequency structure in the total power spectrum of a single antenna. These fringes or ripples due to correlated signal interference are present at a low level in the spectrum of any single antenna and are a major source of systematics in systems used to measure the global redshifted 21-cm signal from the early universe. In the Sea Interferometer a single antenna on a cliff above the sea is used to add the signal from the direct path to the signal from the path reflected from the sea thereby forming an interferometer. This was used for mapping radio sources with a single antenna by Bolton and Slee in the 1950s. In this paper we derive analytic expressions to determine the level of these ripples and compare these results in a few simple cases with electromagnetic modeling software to verify that the analytic calculations are sufficient to obtain the magnitude of the scattering effects on the measurements of the global 21-cm signal. These analytic calculations are needed to evaluate the magnitude of the effects in cases that are either too complex or take too much time to be modeled using software.
An Experimental Assessment of Inconsistencies in Memory Dumps: Experimental data
Creators: name: Ottmann, Jenny
Publisher: name: Zenodo
Year: 2023

description: This archive contains the memory dumps and analysis results for the paper "An Experimental Assessment of Inconsistencies in Memory Dumps". More details about the experimental setup can be found in the paper.
Each zip file contains the memory dumps (file ending ".dump") in folders that start with "Group". The dumps are named following the scheme pid-virtualHeapStart-virtualHeap-End-ListElementNumber-ThreadNumber-Iteration. Where pid is the pid of the pivot process running in this iteration. Its heap start and end address are included in the name to be used in the analysis. The number of list elements and threads for documentation purposes. The iteration is included to ensure the uniqueness of the name within the group folder.Additionally, metadata is included:

Files ending with "free.txt": Periodic output of command line tool free
Files ending with "limeexectime.txt": The runtime of LiME
 
Inside of the group folders the folder "Results" contains the analysis results.They include:

Files ending with "dump": The extracted heap of the pivot program.
results.csv: The aggregated results regarding time and inconsistencies. The columns contain from left to right: The name of the dump, the number of vma inconsistencies, the number of vector inconsistencies, the execution time of LiME.
Files ending with "free.csv": The output of free for each dump as a csv.
freesummary.csv: The average of the free output, based on each dump's "free.csv".
failedheapextract.txt: The names of the memory dumps for which no heap could be extracted. These are not included in results.csv.
failedtimes.csv: The execution times of LiME for the memory dumps for which no heap could be extracted.
Intermediate files:

Files related to cheking the vector clocks in the heaps: checkDumpOutput.txt contains the output of the script that checks the vector clocks. resultscheckdump.csv summarizes the output as number of vector inconsistencies found per dump.
Files related to checking for VMA inconsistencies: vma_validation.txt contains the output of the plugin used to search for VMA inconsistencies. resultsvmaval.csv summarizes the output as number of VMA inconsistencies found per dump.
exectimes.csv: Execution times of LiME per dump.
Files ending with "dumppsxview-out.txt": The output of the linux_psxview plugin, executed for the memory dumps for which the heap extraction failed. Does not contain any tasks if the plugin did not produce any output within an hour, more details can be found in the paper.
Framework for Identification of Factors Affecting Construction Crew Motivation and Performance
Creators: Raoufi, Mohammad
Fayek, Aminah Robinson
Publisher: name: University of Alberta Library
Year: 2018

Construction researchers have long had difficulties identifying motivational factors and situational and contextual factors affecting crew motivation and performance. The two main objectives of this paper are to define a methodology to identify the factors affecting construction crew motivation and performance and to bridge the gap in construction research by exploring more recent motivational concepts that have been introduced and advanced in non construction domains. This paper presents a general review of motivation literature, applies recent advancements in motivation research from non construction disciplines, and presents a case study to illustrate the proposed methodology and findings from data analysis. Because of the limitation in the sample size of craft survey respondents, the results of the case study should not be generalized to the entire construction industry. This paper makes three contributions: first, it provides a comprehensive set of factors affecting crew motivation and performance; second, it presents a novel methodology for identifying and measuring motivational factors at both the individual and crew levels; and third, it defines a methodology to evaluate and rank critical factors and factors with a high potential for improvement in construction crew motivation and performance and to evaluate the differences between the perspectives of supervisors and craftspeople on the identified critical factors.
Max Weber e l'identità europea
Creators: name: Cotesta, Vittorio
Publisher: name: Universita' degli Studi di Salerno
Year: 2016
Subjects: Modernity
European identity
China

description: The paper analyzes the Weberian conception of modernity, capitalism, Europe and the West. Through the comparison with India, China and the Islamic civilization Weber studies the Eu-ropean identity, its uniqueness. Weber’s conception has at-tracted much criticism. In this essay the critiques of Shmuel N. Eisenstadt and Jacq Goody are discussed. Neither however, in our view has much legitimacy: Eisenstadt, in fact, follows We-ber’s approach while Goody rejects Weber’s eurocentrism and his comparative methodology. According to Goody, it would be wrong to look for differences and the uniqueness of civiliza-tion. Instead, what is common to all of them should be sought. In actual fact, Weber studies the uniqueness of the West and of Europe and, at the same time, the uniqueness of China or India. The similarities and differences among civilizations are the goals of scientific knowledge. In this sense, Weber’s methodo-logical teaching is still relevant today.
Sonnenfleckenzeichnung Nr. 28.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 01.02.1987, 09:30, erstellt von Marco Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
TinyKG: Memory-Efficient Training Framework for Knowledge Graph Neural Recommender Systems
Creators: name: Chen, Huiyuan
name: Li, Xiaoting
name: Zhou, Kaixiong
name: Hu, Xia
name: Yeh, Chin-Chia Michael
name: Zheng, Yan
name: Yang, Hao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: There has been an explosion of interest in designing various Knowledge Graph Neural Networks (KGNNs), which achieve state-of-the-art performance and provide great explainability for recommendation. The promising performance is mainly resulting from their capability of capturing high-order proximity messages over the knowledge graphs. However, training KGNNs at scale is challenging due to the high memory usage. In the forward pass, the automatic differentiation engines (\textsl{e.g.}, TensorFlow/PyTorch) generally need to cache all intermediate activation maps in order to compute gradients in the backward pass, which leads to a large GPU memory footprint. Existing work solves this problem by utilizing multi-GPU distributed frameworks. Nonetheless, this poses a practical challenge when seeking to deploy KGNNs in memory-constrained environments, especially for industry-scale graphs. Here we present TinyKG, a memory-efficient GPU-based training framework for KGNNs for the tasks of recommendation. Specifically, TinyKG uses exact activations in the forward pass while storing a quantized version of activations in the GPU buffers. During the backward pass, these low-precision activations are dequantized back to full-precision tensors, in order to compute gradients. To reduce the quantization errors, TinyKG applies a simple yet effective quantization algorithm to compress the activations, which ensures unbiasedness with low variance. As such, the training memory footprint of KGNNs is largely reduced with negligible accuracy loss. To evaluate the performance of our TinyKG, we conduct comprehensive experiments on real-world datasets. We found that our TinyKG with INT2 quantization aggressively reduces the memory footprint of activation maps with $7 \times$, only with $2\%$ loss in accuracy, allowing us to deploy KGNNs on memory-constrained devices.
Sonnenfleckenzeichnung Nr. 206.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 28.08.1987, 07:45, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
The role of super-spreaders in modeling of SARS-CoV-2
Creators: name: Rousse, F
name: Carlsson, M
name: Ogren, M
name: Wellander, B Kalischer
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Probability (math.PR)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: In stochastic modeling of infectious diseases, it has been established that variations in infectivity affect the probability of a major outbreak, but not the shape of the curves during a major outbreak, which is predicted by deterministic models [Diekmann et al., 2012]. However, such conclusions are derived under idealized assumptions such as the population size tending to infinity, and the individual degree of infectivity only depending on variations in the infectiousness period. In this paper we show that the same conclusions hold true in a finite population representing a medium size city, where the degree of infectivity is determined by the offspring distribution, which we try to make as realistic as possible for SARS-CoV-2. In particular, we consider distributions with fat tails, to incorporate the existence of super-spreaders. We also provide new theoretical results on convergence of stochastic models which allows to incorporate any offspring distribution with a finite variance.
bwFDM – The Federal State Initiative for Research Data Management in Baden-Württemberg
Creators: name: Krömer, Cora F.
name: Schubö, Fabian
Publisher: name: Zenodo
Year: 2023
Subjects: Forschungsdatenmanagement
Forschungsdaten
FDM
RDM
research data management
Landesinitiative bwFDM
Baden-Württemberg

description: bwFDM is engaged in various areas of research data management (RDM). The main focus is on establishing networks between stakeholders, providing information on RDM-related topics, offering consultations and training, and hosting the biennial conference series E-Science-Tage. Several of the services offered by bwFDM are relevant to research groups, bwHPC service providers, and bwHPC support centers. A central aim is to connect these stakeholders with RDM consultants and other stakeholders from the research data infrastructure in Baden-Württemberg. Therefore, bwFDM is in constant exchange with bwHPC-S5 on cross-cutting topics.
A major bwFDM-flagship is forschungsdaten.info, the leading information platform for RDM in Germany. The platform provides an introduction and overview of RDM topics, services and tools in general and for specific scientific fields, as well as news on current developments and upcoming events in the RDM community.
Soon, bwFDM will expand its information services. A detailed mapping of RDM stakeholders, services and tools in Baden-Württemberg is underway. The mapping results will be provided on our future website, www.bwfdm.de (not yet available), which will be particularly useful for finding shared services.
Due to the growing demand for structured RDM training, we are designing an RDM certificate course tailored to specifics in Baden-Württemberg. The aim is to facilitate entry into RDM support at higher education and research institutions, whether in second-level support or in the role of a data steward.
Another bwFDM-flagship is the conference series E-Science-Tage with a strong interdisciplinary orientation. The conference series focuses on the topics of RDM and Open Science and provides diverse offerings for professional exchange between science and technology. Contributions connecting high performance computing with other aspects of research data infrastructure are most welcome for the next E-Science-Tage 2025 in Heidelberg.
Altogether, bwFDM supports the expansion of RDM activities in Baden-Württemberg, connecting various stakeholders and providing information and training.
Optimizing Real-Time Performances for Timed-Loop Racing under F1TENTH
Creators: name: Gupta, Nitish
name: Wilson, Kurt
name: Guo, Zhishan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Motion planning and control in autonomous car racing are one of the most challenging and safety-critical tasks due to high speed and dynamism. The lower-level control nodes are expected to be highly optimized due to resource constraints of onboard embedded processing units, although there are strict latency requirements. Some of these guarantees can be provided at the application level, such as using ROS2's Real-Time executors. However, the performance can be far from satisfactory as many modern control algorithms (such as Model Predictive Control) rely on solving complicated online optimization problems at each iteration. In this paper, we present a simple yet effective multi-threading technique to optimize the throughput of online-control algorithms for resource-constrained autonomous racing platforms. We achieve this by maintaining a systematic pool of worker threads solving the optimization problem in parallel which can improve the system performance by reducing latency between control input commands. We further demonstrate the effectiveness of our method using the Model Predictive Contouring Control (MPCC) algorithm running on Nvidia's Xavier AGX platform.
Sonnenfleckenzeichnung Nr. 154.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 05.07.1987, 09:30, erstellt von Michele Bianda, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 103.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 04.05.1987, 08:30, erstellt von Michele Bianda, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Innovative probabilistic methodologies to assess seismic vulnerability of simple supported girder bridges
Creators: name: Mammone, Angelo
Publisher: name: Universita degli studi di Salerno
Year: 2019
Subjects: subject: ICAR/09 TECNICA DELLE COSTRUZIONI
subject: Seismic vulnerability
subject: Fragility curves
subject: Bridge

description: 2017 - 2018
description: Since the end of the eighties, numerous studies have been conducted analysing the relationship between the infrastructures and the economic development of the territory, highlighting its close correlation. In the last decades, the costs for the management and maintenance of these networks have increased considerably considering the age of the same and the increase in demand that has been witnessed. The phenomenon is particularly evident in some elements of transport networks such as bridges, viaducts and tunnels, which, as evidenced by the telluric events that have hit Italy in recent decades, have shown a high level of vulnerability also towards media events. Intensity. The problems encountered are essential because the Italian infrastructural network is constituted for the vast majority of bridges built in the 60s and 80s, structures conceived in seismic territories generally only afterwards and, therefore, without seismic engineering criteria. Furthermore, the lack of routine maintenance policies and practices has accentuated the decay of structural services in some cases. This thesis study focuses on the analysis of the efficiency of adaptation and improvement techniques for multi-span bridges simply supported, built in Italy in the 60s-80s, a simple bridge/viaduct suite was used. Defined according to the geometric and mechanical characteristics detected by the bridges built on the Italian motorway and road network. To evaluate the structural performance of bridges and viaducts, the probabilistic method from the basis of Performance Based Earthquake Engineering (PBEE) was used, in particular through the use of fragility curves. The purpose of bridging curves for bridges, however, shows some limitations, since they are complex structures composed of several structural elements that interact with each other, so it is difficult to determine the collapse mechanisms of the whole system. To simplify the comprehension of the global collapse mechanism, thus facilitating the general evaluation of the improvement proposals related to the single structural components, we propose an innovative method of analysis and graphic representation of the fragility curves. [edited by Author]
Efficient Strategies for Graph Pattern Mining Algorithms on GPUs
Creators: name: Ferraz, Samuel
name: Dias, Vinicius
name: Teixeira, Carlos H. C.
name: Teodoro, George
name: Meira, Wagner
Publisher: name: arXiv
Year: 2022
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Graph Pattern Mining (GPM) is an important, rapidly evolving, and computation demanding area. GPM computation relies on subgraph enumeration, which consists in extracting subgraphs that match a given property from an input graph. Graphics Processing Units (GPUs) have been an effective platform to accelerate applications in many areas. However, the irregularity of subgraph enumeration makes it challenging for efficient execution on GPU due to typical uncoalesced memory access, divergence, and load imbalance. Unfortunately, these aspects have not been fully addressed in previous work. Thus, this work proposes novel strategies to design and implement subgraph enumeration efficiently on GPU. We support a depth-first search style search (DFS-wide) that maximizes memory performance while providing enough parallelism to be exploited by the GPU, along with a warp-centric design that minimizes execution divergence and improves utilization of the computing capabilities. We also propose a low-cost load balancing layer to avoid idleness and redistribute work among thread warps in a GPU. Our strategies have been deployed in a system named DuMato, which provides a simple programming interface to allow efficient implementation of GPM algorithms. Our evaluation has shown that DuMato is often an order of magnitude faster than state-of-the-art GPM systems and can mine larger subgraphs (up to 12 vertices).
description: Accepted for publication on IEEE 34th International Symposium on Computer Architecture and High Performance Computing (SBAC-PAD'22)
The hermite-hadamard type inequalities for operator s-convex functions
Creators: name: Ghazanfari, Amir Ghasem
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A63, 26D15

description: In this paper we introduce operator s-convex func- tions and establish some Hermite-Hadamard type inequalities in which some operator s-convex functions of positive operators in Hilbert spaces are involved.
description: 11 pages
Sonnenfleckenzeichnung Nr. 279.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 07.12.1987, 08:30, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Revisiting coincidence rate between Gravitational Wave detection and short Gamma-Ray Burst for the Advanced and third generation
Creators: name: Regimbau, T.
name: Siellez, K.
name: Meacher, D.
name: Gendre, B.
name: er, M. Bo\"
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We use realistic Monte-Carlo simulations including both gravitational-wave and short gamma-ray burst selection effects to revisit the coincident rate of binary systems composed of two neutron stars or a neutron star and a black hole. We show that the fraction of GW triggers that can be observed in coincidence with sGRBs is proportional to the beaming factor at $z=0$, but increases with the distance, until it reaches 100 \% at the GW detector horizon distance. When this is taken into account the rate is improved by a factor of $~3$ compared to the simple beaming factor correction. We provide an estimate of the performance future GRB detectors should achieve in order to fully exploit the potentiality of the planned third generation GW antenna Einstein Telescope, and we propose a simple method to constrain the beaming angle of sGRBs.
description: 31 pages, 11 figures, 4 tables, accepted for publication in ApJ
Sonnenfleckenzeichnung Nr. 56.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 12.03.1987, 08:30, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Methods and algorithms for power devices losses behavioral modeling
Creators: name: Migliaro, Mario
Publisher: name: Universita degli studi di Salerno
Year: 2017
Subjects: subject: ING-IND/31 ELETTROTECNICA
subject: Power
subject: Inductor
subject: IGBT

description: 2015 - 2016
description: Power electronics is since decades in the focus of very important technology innovations, as the characteristics and the performances of power supplies can severely condition and limit the performances of the system to be fed. In almost all the applications there is the demand to increase as much as possible the ratio between the maximum power the power supplies can deliver and their volume, defined as the power-density while, at the same time, the cost must be as reduced as possible. For this reason, electronic system designers have the task of finding, in a reasonable time, ever better performing solutions, choosing the best semiconductor devices and magnetic components. The attention of this thesis has been on the modeling of power losses of magnetic components and semiconductor devices, considering that they have the biggest impact on the system efficiency. The model classically adopted are usually calculated in different conditions from the operative conditions, require long time simulations, need the knowledge input variables that cannot be easily measured and have coefficients difficult to be identified. For this reason, the aim of this thesis has been to investigate a general approach to identify power losses models of devices, obtained from experimental data. In particular, sufficiently accurate and at the same time simple and intelligible loss model are desired. The approach adopted is based on Genetic Programming (GP), that is an evolutionary method able to return output models, in order to minimize a given fitness function that is a metric of the quality of the solution. The goal of the algorithm has been to obtain models accurate, but at the same time simple and intelligible for the user. These two desired conditions are often conflicting, being complicated models usually accurate and simple models usually inaccurate. For this reason, a Multi Objective (MO) approach, returning a Pareto Front composed non-dominated solutions, has been adopted. Moreover, the GP has been modified to return parametric functions, having the same structure, but different coefficients for all the devices to characterize. In this way, it is supposed to have a more general model, that is sufficiently good for all the devices. ... [edited by Author]
IPO Underpricing and Local Networks across Issuing Firms
Creators: name: Fosco, Giovanni
Publisher: name: Universita degli studi di Salerno
Year: 2021
Subjects: subject: SECS-P/01 ECONOMIA POLITICA
subject: Underpricing
subject: Network
subject: Spatial

description: 2019 - 2020
description: La prossimità geografica ad altre società emittenti incide sulla dimensione della dell' underpricing di una IPO? Il seguente lavoro mostra evidenze significative sull'effetto dell’underpricing di una IPO dovuto alla distribuzione geografica, sfruttando le prossimità spaziali tra società emittenti che hanno assunto lo stesso underwriter per la loro IPO. I risultati evidenziano che le prossimità spaziali tra gli emittenti sono rileventi e che implicano effetti diversi sull' underpricing di una IPO tra le due macro-aree analizzate, gli Stati Uniti e il continente europeo. Infatti, negli Stati Uniti, L’underpricing è inferiore di circa 4 punti percentuali per le imprese che scelgono un underwriter come gli emittenti limitrofi. Allo stesso tempo, è di circa 3 punti percentuali in più nel continente europeo. Tuttavia, anche se i risultati sono notevoli, esse rappresentano delle nuove evidenze che richiedono ulteriore lavoro per gli sviluppi futuri e un'interpretazione più completa. [a cura dell'Autore]
description: Does the geographic proximity to other issuing firms affect the size of IPO underpricing? I provide significant evidence on the IPO underpricing effect of geographic distribution by exploiting spatial proximities across issuers who have hired the same underwriter for the IPO process. The results highlight that spatial proximities among issuers matter and imply different effects on the IPO underpricing between the two macro-area analyzed, the US and the European continent. Ceteris paribus, the underpricing is about 4 percentage points lower for firms that choose an underwriter as nearby issuers in the US. At the same time, it is about 3 percentage points higher for firms that choose an underwriter as nearby issuers in the European continent. However, even if the results are remarkable, they are novel and require further work for future developments and a most comprehensive interpretation. [edited by Author]
Characterisation, enhancement and impact of temporal intensity contrast in multi-terawatt laser systems
Creators: name: Fullalove, James
Publisher: name: Imperial College London
Year: 2023

description: Significant features in a laser pulse at focused intensities above 10^12 Wcm−2, such as discrete pulses arriving before the main peak of the laser or unwanted emission from laser amplifiers, can pre-ionise a target before the arrival of the main laser pulse. This produces a ‘preplasma’ which expands from the front of the target and which may then significantly alter the subsequent laser-matter interaction and even supress ion acceleration. In this work, we develop an extended third order autocorrelator diagnostic for ‘artefact-free’ pulse measurement of the sources of the ‘low-contrast’ features in the temporal profile of the Cerberus laser system at Imperial College London, primarily arising from scattered light in chirped pulse amplification subsystems and optical parametric amplifiers. These measurements informed a contrast enhancement scheme using cylindrical dielectric hollow core fibre is shown to be a capable spatial filter at high energies (∼180 µJ, 1.2 ps) which also demonstrates high transmission efficiencies, >75%, approaching that of conventional spatial filters, and demonstrated to be highly effective in removing astigmatism and spatial chirp. We investigated reintroducing a discrete prepulse, measuring the effect this has on the emission of charged particles from thin metallic foils irradiated at relativistic intensities of order 10^19 Wcm−2. In particular, we have observed a factor ∼5 times enhancement in the maximum of proton energies by the addition of a 2.75× 10−4 relative contrast prepulse, 60 ps before the main pulse, with preliminary results providing evidence of a self-focusing enhancement mechanism. Finally, we also describe an off-harmonic optical probe based on a supercontinuum source which can better characterise the dynamics of these measurements close to the target surface at wavelengths not obscured by bright self-emission at the laser-plasma interaction region. A supercontinuum optical probe, with ∼600 nm spectral width, generated from an aqueous zinc chloride salt solution.
The e(ducation) Pizza Game - E-pizza Pack Online
Creators: name: Nerantzi, Chrissi
name: Hammersley, John
name: McDonald,, Damian
name: Briggs, Sarah
name: Brew, Mavis
name: Lickiss, Matthew
name: Gilmore, Joseph
name: Martinez Arboleda, Antonio
name: Gooch, Laura
name: Reader, Charles
name: Binks Iturriagagoitia, Martha
Publisher: name: National Teaching Repository
Year: 2023
Subjects: classificationCode: 390303
subject: Higher education

description: This openly licensed e(ducation)-pizza game supports the co-design of an imaginative curriculum and learning through collaborative play and conversation where all ideas are possible, welcome and considered to inform change. The game is designed to enliven, deepen, diversify such conversations using the familiar pizza making process.Creators: Staff and students at the University of LeedsDesign proof: Odysseas Frank, student, Norwich University of the ArtsAvailable translations: Can be accessed here.We are grateful for the support offered by Professor Jeff Grabill, DVC Student Education, the Curriculum Redefined Initiative, our colleagues in the Learning Design Agency and especially Terry Owens, Anthony McDonald, the School of Education and members of the Design Thinking Community. We would also like to thank Dan Trowsdale and Eirini Bouka who joined us for the first part of this project and their input, Odysseas Frank for his invaluable help in finalising and bringing all the game resources together and everyone else who has supported us on this journey.License: The e(ducation)-pizza game co-created at the University of Leeds in 2023 by Chrissi Nerantzi, John Hammersley, Damian McDonald, Sarah Briggs, Mavis Brew, Matthew Lickiss, Joseph Gilmore, Antonio Martinez Arboleda, Laura Gooch, Charles Reader, Martha Binks Iturriagagoitia is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.© University of Leeds 2023

Testimonials
"E-pizza game will help engage students and stakeholders in discussing and having conversations using something tangible and fun. By being playful, we all relax, making it easier to connect and reducing hierarchy. By using an analogy-game, we can imagine different alternatives. I would recommend using e-pizza to align multiple stakeholders towards a vision, or as part of an ideation session." Iria Lopez, Senior Design Consultant, Learning Design Agency, University of Leeds"The e-pizza game is great fun way to drive inclusivity, creativity and engagement." Tony Morgan, Associate Professor in Innovation Management Practice, University of Leeds
The application of wellbore embedded discrete fracture model (EDFM) in fracture diagnosis through DTS and well interference analysis
Creators: name: Zhao, Zihao
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Wellbore EDFM
DTS
Fracture diagnosis
Well interference

description: The advancement of hydraulic fracturing techniques has boosted the economic development of the unconventional reservoir. The created complex fracture networks provide a high-conductivity flow channel for the production and increase the ultimate recovery. However, they also posed great challenges to efficiently model the flow inside. The newly developed Embedded Discrete Fracture Model (EDFM) enables efficient fracture modeling without sacrificing accuracy. It has been widely applied in many challenging research topics associated with complex fracture networks including Enhanced Geothermal System, gas huff-n-puff, well interference analysis, and automatic history matching. But the mechanism of EDFM makes it hard to incorporate a discrete wellbore module into the commercialized simulator, which limits its application in some topics that require detailed wellbore modeling. The objective of this study is to establish a new workflow that can integrate EDFM with a fully-coupled wellbore-reservoir model to simulate the flow behavior. The idea is to generate the pseudo parameters for the simulator input to force the simulator to get the correct wellbore perforation and trajectory information with EDFM. The developed wellbore EDFM module is integrated with thermal EDFM to simulate the temperature distribution in the wellbore and reservoir with complex fracture networks, which is applied as the forward model for fracture diagnosis through Disributed Temperature Sensing (DTS). A field case is conducted, which verifies the potential application of our workflow in fracture diagnosis. By matching the temperature distribution along the wellbore, we can estimate the fracture geometry and properties, which provide valuable information for future operation optimization. Subsequently, we applied our wellbore EDFM module to simulate the well interference through fracture hits. It verifies the great capacity of our wellbore EDFM module to handle complex flow regimes inside the wellbore even when counter flow exists. It is also the first time for the simulator to handle the wellbore flow at closed wells. Our newly developed wellbore EDFM should have great potential in other research topics in the future.
Sonnenfleckenzeichnung Nr. 246.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 18.10.1987, 08:00, erstellt von Marco Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 171.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 23.07.1987, 11:45, erstellt von Michele Bianda, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Supplementary Tables from Sperm competition increases sperm production and quality in Cataglyphis desert ants
Creators: name: Degueldre, Félicien
name: Aron, Serge
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Cell Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Table S1: Descriptive statistics for sperm production, sperm viability, and sperm DNA fragmentation (log10[DFI]) for the nine Cataglyphis study species. Table S2: Sperm viability, sperm production, sperm DNA fragmentation (log10[DFI]), and head width (mm) for each male from the nine Cataglyphis study species.
Sonnenfleckenzeichnung Nr. 43.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 27.02.1987, 09:30, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 282.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 12.12.1987, 08:45, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)