recorded data medium

2011 ◽  
Keyword(s):  
Recorded Data ◽  
Data Medium

Comprehensive Study of the Performance of Winter Tires on Ice, Snow, and Asphalt Roads: The Influence of Tire Type and Wear

2017 ◽  
Vol 45 (3) ◽  
pp. 175-199 ◽  
Author(s):  
Mattias Hjort ◽  
Olle Eriksson ◽  
Fredrik Bruzelius
Keyword(s):  
Vehicle Performance ◽  
Testing Facility ◽  
Recorded Data ◽  
Winter Road ◽  
Tire Testing ◽  
Tire Forces ◽  
Real Traffic ◽  
Real Vehicle ◽  
Comprehensive Study

ABSTRACT This work presents a comprehensive study of the performance of winter tires on snow, ice, and asphalt. A set of 77 different winter tires were carefully selected for the study. Of these, 27 were new and 50 were worn from real traffic use. All three tire types for winter conditions (Nordic, European, and studded) were represented. All tires have been tested using a mobile tire-testing device for snow and asphalt and using a stationary tire-testing facility for ice. Both devices recorded the tire forces and motions, enabling a close to complete stationary characterization of the tires. In addition, 42 of the tires were tested on a passenger car, where brake performance was evaluated for the three different road conditions. This enables a comparative study of performance between tire types and wear for various winter road conditions. The results suggest that the recorded data represent real vehicle performance. Some conclusions from the measurements are that the effect of wear is consistent between the tire groups and that the performance degradation is most noticeable on studded tires on ice and on European tires on snow.

The process of investigating Diocesan Curia in Lublin by the PRL’s apparatus of repression in the years 1946-1974

2013 ◽  
Vol 67 (1) ◽  
Author(s):  
Elżbieta Kosobudzka
Keyword(s):  
Catholic Church ◽  
Gain Control ◽  
Source Analysis ◽  
Secret Police ◽  
Personal Lives ◽  
Catholic Clergy ◽  
Recorded Data ◽  
The Government ◽  
Operational Activities ◽  
Intensive Surveillance

SUMMARYThe article below focuses on the source analysis of the process of investigating Diocesan Curia in Lublin in the years 1946-1947, during the period when two Lublin ordinaries were in charge: Bishop Stefan Wyszyński (1946-1948) and Bishop Piotr Kałwa (1949-1974). Diocesan Curia, as the most important institution in the Church administrative hierarchy, was subject to intensive surveillance by PRL’s apparatus of repression.At the beginning, the process of investigating the management structure on the diocese level was not conducted by specially selected departments but was performed as a part of broadly conceived actions directed against Catholic clergy. In the years 1946-1948,when bishop Stefan Wyszyński was in charge, operational activities against the clergy and the bishops were led by 5th Section of 5th Department of Voivodeship Public Security Office (Sekcja V Wydziału V Wojewódzkiego Urzędu Bezpieczeństwa) in Lublin (until the February of 1953). It can be inferred from the recorded data that until 1949 the Diocesan Curia’s circle in Lublin was very poorly uncovered by Polish communist secret police and their activity amounted only to gathering and verifying data received from informants. The shortage of well-trained agents prevented taking more intensive actions against Bishop Wyszyński and Diocesan Curia in Lublin.In the years 1949-1974, when Bishop Piotr Kałwa was in charge, the 5th Section of the 5th Department of VPSO continued their operational activities aimed against the Lublin’s Curia. In 1953 a new department was created on the basis of 5th Section. The so-called 11th Department took over the entirety of cases pertaining to the Catholic Church. In 1955 the 11th Department was transformed into 6th Department of VPSO in Lublin. 3rd Department of VPSO in Lublin and 1st Section of 6th Department of Polish communist secret police of Voivodeship Polish Citizen Militia Headquarters in Lublin (referat Służby Bezpieczeństwa w Komendzie Wojewódzkiej Milicji Obywatelskiej), respectively, also conducted investigation activities concerning the bishops and Curia.As of 1949, the Diocesan Curia in Lublin was subject to intensive surveillance by the PRL’s security service apparatus. Its main aim at that point was to restrict the Curia’s activity so as to gain control over it. In order to achieve that, the activity of Curial employees and bishops was documented and revealed. Additionally, the conflicts between the bishops, Curial employees and KUL’s management were incited and deepened. What is more, the secret police attentively scrutinized bishops’ and Curial employees’ personal lives in order to gather compromising data, gained secret collaborators (47 secret agents were involved in the process) and limited Curia employees’ departures for studies abroad. Almost every type of operation activities was used against Bishop Piotr Kałwa. The secret police applied phone tapping, bugging, surveillance, reading mail and sending anonymous letters in order to undermine his authority. What is more, the secret police tried to set bishop Kałwa at variance with Primate Wyszyński. However, these actions did not change Bishops Kałwa’s stance who, until his death, unwaveringly defended the Catholic Church’s independence from the government.

TECHNIQUE OF QUESTIONING CARRIED OUT BY NOVICE TEACHERS

2012 ◽  
Vol 1 (1) ◽  
Author(s):  
Sri Wahyuni Sri Wayuni
Keyword(s):  
Key Words ◽  
Novice Teachers ◽  
Teacher Talk ◽  
Teaching Activities ◽  
Low Level ◽  
Questioning Techniques ◽  
Recorded Data ◽  
Component Skill

Abstract: When teachers conduct a lesson, the activity of posing questions always appears in it. The activity of posing questions includes the skills of basic questioning and advanced questioning in which a teacher must acquire. The focus of the study is on the basic questioning techniques only. ?é?áThe purposes of this study are aimed at finding: 1) the basic questioning component skill used by the novice teachers in the classroom, 2) the types of question used by the novice teachers in the classroom, and 3) the levels of questioning category used by the novice teachers in the classroom. This discourse study was based on the analysis of the teacher talk in class. The analysis was based on the recorded data of the five novices when they conducted lessons in class. The recorded data were transcribed. From the transcriptions, teachers?óÔé¼Ôäó talk were identified and classified into types of questions, levels of questions, and basic questioning components. The findings of the study are: 1) novices used higher number of closed questions; 2) there were more low level questions conducted by novices; 3) the large number of the skill components in their teaching activities were the distributing, pausing and reacting. ?é?á Key Words: Novice Teachers, Technique of Questioning,

The Makrakomi Archaeological Landscapes Project. A preliminary report on investigations carried out in 2010–2012

2013 ◽  
Vol 6 ◽  
pp. 211-260 ◽  
Author(s):  
Maria-Foteini Papakonstantinou ◽  
Arto Penttinen ◽  
Gregory N. Tsokas ◽  
Panagiotis I. Tsourlos ◽  
Alexandros Stampolidis ◽  
...  
Keyword(s):  
Preliminary Report ◽  
Geophysical Survey ◽  
Small Scale ◽  
Hellenistic Period ◽  
Surface Survey ◽  
Multiple Structures ◽  
Recorded Data ◽  
Architectural Survey ◽  
The Hill ◽  
The Town

In this article we provide a preliminary report of the work carried out between 2010 and 2012 as part of the Makrakomi Archaeological Landscapes Project (MALP). The programme of research is carried out in co-operation between the Swedish Institute at Athens and the 14th Ephorate of Prehistoric and Classical Antiquities at Lamia. The interdisciplinary project started in the summer of 2010, when a pilot survey was conducted in and around the hill of Profitis Elias, in the modern municipality of Makrakomi, where extensive traces of ancient fortifications are still visible. Systematic investigations have been conducted since 2011 as part of a five-year plan of research involving surface survey, geophysical survey and small-scale archaeological excavation as well as geomorphological investigation. The primary aim of MALP is to examine the archaeology and geomorphology of the western Spercheios Valley, within the modern municipality of Makrakomi in order to achieve a better understanding of antiquity in the region, which has previously received scant scholarly attention. Through the archaeological surface survey and architectural survey in 2011 and 2012 we have been able to record traces of what can be termed as a nucleated and structured settlement in an area known locally as Asteria, which is formed by the projecting ridges to the east of Profitis Elias. The surface scatters recorded in this area suggest that the town was primarily occupied from the late 4th century BC and throughout the Hellenistic period. The geophysical survey conducted between 2011 and 2012 similarly recorded data which point to the presence of multiple structures according to a regular grid system. The excavation carried out in the central part of Asteria also uncovered remains of a single domestic structure (Building A) which seems to have been in use during the Late Classical and Hellenistic periods. The combined data acquired through the programme of research is thus highly encouraging, and has effectively demonstrated the importance of systematic archaeological research in this understudied area of Central Greece.

scholarly journals Patch antenna sensor for wireless ice and frost detection

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ryan Kozak ◽  
Kasra Khorsand ◽  
Telnaz Zarifi ◽  
Kevin Golovin ◽  
Mohammad H. Zarifi
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
Wide Band ◽  
Power Lines ◽  
Ice Thickness ◽  
Ice Accretion ◽  
Robust Method ◽  
Frequency Shifts ◽  
Resonant Amplitude ◽  
Recorded Data

AbstractA patch antenna sensor with T-shaped slots operating at 2.378 GHz was developed and investigated for wireless ice and frost detection applications. Detection was performed by monitoring the resonant amplitude and resonant frequency of the transmission coefficient between the antenna sensor and a wide band receiver. This sensor was capable of distinguishing between frost, ice, and water with total shifts in resonant frequency of 32 MHz and 36 MHz in the presence of frost and ice, respectively, when compared to the bare sensor. Additionally, the antenna was sensitive to both ice thickness and the surface area covered in ice displaying resonant frequency shifts of 2 MHz and 8 MHz respectively between 80 and 160 μL of ice. By fitting an exponential function to the recorded data, the freezing rate was also extracted. The analysis within this work distinguishes the antenna sensor as a highly accurate and robust method for wireless ice accretion detection and monitoring. This technology has applications in a variety of industries including the energy sector for detection of ice on wind turbines and power lines.

scholarly journals Inverse reinforcement learning in contextual MDPs

2021 ◽  
Author(s):  
Stav Belogolovsky ◽  
Philip Korsunsky ◽  
Shie Mannor ◽  
Chen Tessler ◽  
Tom Zahavy
Keyword(s):  
Reinforcement Learning ◽  
Optimization Problem ◽  
Decision Processes ◽  
Inverse Reinforcement Learning ◽  
Convex Optimization Problem ◽  
Reward Function ◽  
Dynamic Treatment Regime ◽  
Markov Decision ◽  
Dynamic Treatment ◽  
Recorded Data

AbstractWe consider the task of Inverse Reinforcement Learning in Contextual Markov Decision Processes (MDPs). In this setting, contexts, which define the reward and transition kernel, are sampled from a distribution. In addition, although the reward is a function of the context, it is not provided to the agent. Instead, the agent observes demonstrations from an optimal policy. The goal is to learn the reward mapping, such that the agent will act optimally even when encountering previously unseen contexts, also known as zero-shot transfer. We formulate this problem as a non-differential convex optimization problem and propose a novel algorithm to compute its subgradients. Based on this scheme, we analyze several methods both theoretically, where we compare the sample complexity and scalability, and empirically. Most importantly, we show both theoretically and empirically that our algorithms perform zero-shot transfer (generalize to new and unseen contexts). Specifically, we present empirical experiments in a dynamic treatment regime, where the goal is to learn a reward function which explains the behavior of expert physicians based on recorded data of them treating patients diagnosed with sepsis.

scholarly journals A computational framework to establish data-driven constitutive models for time- or path-dependent heterogeneous solids

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Weijian Ge ◽  
Vito L. Tagarielli
Keyword(s):  
Constitutive Models ◽  
Computational Procedure ◽  
Data Driven ◽  
Dissipated Energy ◽  
Computational Framework ◽  
Heterogeneous Solids ◽  
Non Linear ◽  
Recorded Data ◽  
Path Dependent ◽  
Computational Homogenisation

AbstractWe propose and implement a computational procedure to establish data-driven surrogate constitutive models for heterogeneous materials. We study the multiaxial response of non-linear n-phase composites via Finite Element (FE) simulations and computational homogenisation. Pseudo-random, multiaxial, non-proportional histories of macroscopic strain are imposed on volume elements of n-phase composites, subject to periodic boundary conditions, and the corresponding histories of macroscopic stresses and plastically dissipated energy are recorded. The recorded data is used to train surrogate, phenomenological constitutive models based on neural networks (NNs), and the accuracy of these models is assessed and discussed. We analyse heterogeneous composites with hyperelastic, viscoelastic or elastic–plastic local constitutive descriptions. In each of these three cases, we propose and assess optimal choices of inputs and outputs for the surrogate models and strategies for their training. We find that the proposed computational procedure can capture accurately and effectively the response of non-linear n-phase composites subject to arbitrary mechanical loading.

scholarly journals Design Floods Considering the Epistemic Uncertainty

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1601
Author(s):  
Radu Drobot ◽  
Aurelian Florentin Draghia ◽  
Daniel Ciuiu ◽  
Romică Trandafir
Keyword(s):  
Flood Hazard ◽  
Epistemic Uncertainty ◽  
Statistical Distributions ◽  
Hazard Maps ◽  
Design Flood ◽  
Flood Hydrograph ◽  
Recorded Data ◽  
Different Shapes ◽  
Significant Spread ◽  
Flood Hazard Maps

The Design Flood (DF) concept is an essential tool in designing hydraulic works, defining reservoir operation programs, and identifying reliable flood hazard maps. The purpose of this paper is to present a methodology for deriving a Design Flood hydrograph considering the epistemic uncertainty. Several appropriately identified statistical distributions allow for the acceptable approximation of the frequent values of maximum discharges or flood volumes, and display a significant spread for their medium/low Probabilities of Exceedance (PE). The referred scattering, as a consequence of epistemic uncertainty, defines an area of uncertainty for both recorded data and extrapolated values. In considering the upper and lower values of the uncertainty intervals as limits for maximum discharges and flood volumes, and by further combining them compatibly, a set of DFs as completely defined hydrographs with different shapes result for each PE. The herein proposed procedure defines both uni-modal and multi-modal DFs. Subsequently, such DFs help water managers in examining and establishing tailored approaches for a variety of input hydrographs, which might be typically generated in river basins.

scholarly journals VertiGo – a pilot project in nystagmus detection via webcam

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Sophia Reinhardt ◽  
Joshua Schmidt ◽  
Michael Leuschel ◽  
Christiane Schüle ◽  
Jörg Schipper
Keyword(s):  
Computer Vision ◽  
Clinical Application ◽  
Feasibility Study ◽  
Clinical Examination ◽  
Pilot Project ◽  
Vestibular Nystagmus ◽  
Central Origin ◽  
Recorded Data

AbstractDizziness is one of the most common symptoms in medicine. For differentiation of peripheral or central origin of the vertigo, history and clinical examination with detection of a nystagmus is essential. The aim of this study was to detect horizontal vestibular nystagmus utilizing a webcam. In the feasibility study, caloric induced vestibular nystagmus was recorded with conventional video-nystagmography and webcam. Analysis of recorded data was performed with a developed software which used computer vision techniques. A designed algorithm detected nystagmus existence and their direction. The software was evaluated by an expert-rated video-nystagmography. Webcam-based vestibular nystagmus detection is possible. Currently, a clinical application is not approved. Further software improvements are necessary to increase its accuracy.

Sign in / Sign up

Export Citation Format

Share Document