scholarly journals A Resilience Toolbox and Research Design for Black Sky Hazards to Power Grids

Complexity ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-15
Author(s):  
Dmitry Borisoglebsky ◽  
Liz Varga
Keyword(s):  
Simulation Model ◽  
Business Processes ◽  
Power Grid ◽  
Multicriteria Decision Making ◽  
Two Dimensions ◽  
Power Grids ◽  
Research Approach ◽  
Grid Simulation ◽  
The Difference

A structured collection of tools for engineering resilience and a research approach to improve the resilience of a power grid are described in this paper. The collection is organized by a two-dimensional array formed from typologies of power grid components and business processes. These two dimensions provide physical and operational outlooks, respectively, for a power grid. The approach for resilience research is based on building a simulation model of a power grid which utilizes a resilience assessment equation to assess baseline resilience to a hazards’ profile, then iteratively selects a subset of tools from the collection, and introduces these as interventions in the power grid simulation model. Calculating the difference in resilience associated with each subset supports multicriteria decision-making to find the most convenient subset of interventions for a power grid and hazards’ profile. Resilience is an emergent quality of a power grid system, and therefore resilience research and interventions must be system-driven. This paper outlines further research required prior to the practical application of this approach.

Quality of life in Hungarian polio survivors

2021 ◽  
Author(s):  
Erika Viktória Miszory ◽  
Melinda Járomi ◽  
Annamária Pakai
Keyword(s):  
Quality Of Life ◽  
Mental Health ◽  
Sample Selection ◽  
Cross Sectional Study ◽  
Two Dimensions ◽  
Cross Sectional ◽  
Emotional Role ◽  
The Difference ◽  
Polio Survivors

Abstract Aim The number of Hungarian polio patients can be estimated at approximately 3000. Polio infection is currently affecting people 56–65 years of age. The aim of the study was to reveal the quality of life of patients living with polio virus in Hungary. Subject and methods The quantitative cross-sectional study was conducted in January–April 2017 among polyomyelitis patients living in Hungary. In the non-random, targeted, expert sample selection, the target group was composed of patients infected with poliovirus (N = 268). We have excluded those who refused to sign the consent statement. Our data collection method was an SF-36 questionnaire. Using the IBM SPSS Statistics Version 22 program, descriptive and mathematical statistics (χ2-test) were calculated (p < 0.05). Results The mean age of the members of the examined population is 63.5 years; 68.1% were women and 31.90% were men. The majority of the respondents were infected by the polyovirus in 1956 (11.9%), 1957 (24.3%), and 1959 (19.5%). Polio patients, with the exception of two dimensions (mental health, social operation), on the scale of 100 do not reach the “average” quality of life (physical functioning 23 points, functional role 36 points, emotional role 47 points, body pain 48 points, general health 42 points, vitality 50 points, health change 31 points). Conclusion The quality of life of polio patients is far below the dimensions of physical function, while the difference in mental health compared to healthy people is minimal. It would be important to educate health professionals about the existing disease, to develop an effective rehabilitation method.

The Role of Migration in the Variety and Quality of Trade: Evidence from Germany

2016 ◽  
Vol 17 (1) ◽  
pp. 1-25 ◽  
Author(s):  
Antonella Bellino ◽  
Giuseppe Celi
Keyword(s):  
Consumer Goods ◽  
Statistical Significance ◽  
Two Dimensions ◽  
Information Flows ◽  
Information Effect ◽  
Industry Trade ◽  
Migrant Communities ◽  
The Difference

AbstractWe explore the migration-trade nexus in the case of Germany over the period 2000-09, disentangling the two dimensions of intra-industry trade (vertical and horizontal). We find that immigration is positively and significantly related to intraindustry trade. However, the magnitude and statistical significance of migration’s impact on trade are considerably higher for horizontal intra-industry trade and increase with the difference in the level of development between Germany and the partner countries. This pattern is consistent with the view that information flows between migrant communities and their country of origin may be more important for consumer goods (where trade in varieties prevails) and that this information effect is more important if trading countries are very different.

On the limited aperture migration in two dimensions

Geophysics ◽  
1998 ◽  
Vol 63 (3) ◽  
pp. 984-994 ◽  
Author(s):  
Jianguo Sun
Keyword(s):  
High Frequency ◽  
Incomplete Data ◽  
Input Data ◽  
Two Dimensions ◽  
Tangent Point ◽  
Prestack Migration ◽  
Taper Function ◽  
Exploration Seismology ◽  
The Difference

Migration of incomplete data aperture is an important problem in exploration seismology because both the location and the size of the migration aperture affect the quality of migration. In 2-D cases, a stationary phase (high‐frequency) analysis concludes that a finitely large migration aperture results in a migrated image with three components. One comes from the tangent point between the traveltime curves of reflected and point‐diffracted rays and gives migration signal. The others are from the two endpoints of the migration aperture and result in migration noise. To guarantee the true‐amplitude reconstruction as well as to remove the migration noise, the migration aperture should be positioned so its central part contains the tangent point mentioned above, and the true‐amplitude weight function should be modified so it tapers the input data near the boundary of the migration aperture. Also, the central part of the migration aperture should be not smaller than the interval confined by the points where the difference between the traveltimes of reflected and point‐diffracted rays equals the half‐duration of the recorded seismic pulse. If the central part of the migration aperture is equal to the interval described here, the whole migration aperture should be confined by the points where the difference between the traveltimes of reflected and point‐diffracted rays equals the duration of the recorded seismic pulse. A migration aperture larger than this size does not improve the migration quality. Furthermore, for the migration apertures suggested here, the form of the taper function is not essential for migration. These results apply to both time and depth (poststack and prestack) migration.

scholarly journals The effects of LED light sources on the parameters defining the quality of electricity

2018 ◽  
Vol 19 ◽  
pp. 01006
Author(s):  
Andrzej Lange ◽  
Marian Pasko
Keyword(s):  
High Voltage ◽  
Power Factor ◽  
Low Voltage ◽  
Power Grid ◽  
Power Grids ◽  
Light Sources ◽  
Medium Voltage ◽  
Led Lights ◽  
Voltage Harmonics

The article presents the regulations and standards relating to the quality of electricity, with special emphasis on higher current and voltage harmonics in high-voltage, medium-voltage and low-voltage power grids and the power factor (PF). The parameters defining the quality of electricity consumed by modern LED bulbs for lighting homes, industrial premises such as offices and production halls, as well as roads and yards were measured and analyzed. The current waveforms for LED lights were presented upon connection to the power grid.

scholarly journals UPAYA PEMBELAJARAN BACA TULIS QUR’AN DALAM PENINGKATAN KARAKTER SISWA SEKOLAH FULL DAY DI SMPN 1 NGIMBANG LAMONGAN

AKADEMIKA ◽  
2018 ◽  
Vol 12 (02) ◽  
Author(s):  
Salman Zahidi ◽  
Ahmad Zhaini
Keyword(s):  
Learning Process ◽  
Day School ◽  
Research Approach ◽  
Full Time ◽  
School Students ◽  
Teacher Student ◽  
School Day ◽  
The Difference ◽  
Full Day

Efforts to improve the quality of education is constantly done, Through the program SMPN 1 Ngimbang, SMPN 1 Ngimbang program is a follow-up of Permendikhud No. 23 of 2014 concerning School Day 8 hours a day for five days, aka full day school. The learning process at SMPN 1 Ngimbangmenggunakan full day system with a good system, it can affect the success of the quality of learning that exist within the institution itself.Thesis entitled "learning effort to read writing qur'an in improving the character of school students full day smpn 1 Ngimbang" This is the result of qualitative research aimed at answering the question how to read and write qur'an in improving karaktersiswa, how important the effort to read write qur'an in increasing karaktersiswaa, apasaja supporting factors and inhibitors in reading and writing qur'an in improving the character of students in SMPN 1 Ngimbang. The research approach used was descriptive qualitative with the type of research as the case on the object. Data collection was done by interview with informant in this research that is principal, teacher, student, guardian of student.The result of the research is first, the learning effort btq that is with the learning which supported by the teacher and the student guardian. Secondly, the importance of btqa efforts in improving the character of full-time school students, such as by doing, activities - activities created by SMPN 1 Ngimbang, the facilities that support infrastructure in the implementation of the learning process. third, the supporting factor is the existence of Teacher Council, and and the professional companion teacher, and the skill in guiding the students, the liveliness and the spirit of the students in studying the science of religion, the inhibiting factors are the difference of the quality of the students in the mastery of btq science, learning in school.

Letter to the Editor: The Continuing Challenge of Evaluating RSD Impairment and Disability

1998 ◽  
Vol 3 (5) ◽  
pp. 8-10
Author(s):  
Robert L. Knobler ◽  
Charles N. Brooks ◽  
Leon H. Ensalada ◽  
James B. Talmage ◽  
Christopher R. Brigham
Keyword(s):  
Disability Evaluation ◽  
Body Part ◽  
Loss Of Function ◽  
Regulatory Requirements ◽  
Major Cardiac Event ◽  
Clinical Scenarios ◽  
Impairment Score ◽  
Occupational Activities ◽  
The Difference

Abstract The author of the two-part article about evaluating reflex sympathetic dystrophy (RSD) responds to criticisms that a percentage impairment score may not adequately reflect the disability of an individual with RSD. The author highlights the importance of recognizing the difference between impairment and disability in the AMA Guides to the Evaluation of Permanent Impairment (AMA Guides): impairment is the loss, loss of use, or derangement of any body part, system, or function; disability is a decrease in or the loss or absence of the capacity to meet personal, social, or occupational demands or to meet statutory or regulatory requirements because of an impairment. The disparity between impairment and disability can be encountered in diverse clinical scenarios. For example, a person's ability to resume occupational activities following a major cardiac event depends on medical, social, and psychological factors, but nonmedical factors appear to present the greatest impediment and many persons do not resume work despite significant improvements in functional capacity. A key requirement according to the AMA Guides is objective documentation, and the author agrees that when physicians consider the disability evaluation of people, more issues than those relating to the percentage loss of function should be considered. More study of the relationships among impairment, disability, and quality of life in patients with RSD are required.

COMBINATORIAL POLYNOMIALLY COMPUTABLE CHARACTERISTICS OF SUBSTITUTIONS AND THEIR PROPERTIES

2020 ◽  
Vol 7 (2) ◽  
pp. 34-41
Author(s):  
VLADIMIR NIKONOV ◽  
◽  
ANTON ZOBOV ◽  
Keyword(s):  
Mathematical Expectation ◽  
Point Of View ◽  
Small Range ◽  
Computational Point ◽  
Wide Range ◽  
Bijective Function ◽  
The Difference ◽  
Element Base ◽  
Selection Of

The construction and selection of a suitable bijective function, that is, substitution, is now becoming an important applied task, particularly for building block encryption systems. Many articles have suggested using different approaches to determining the quality of substitution, but most of them are highly computationally complex. The solution of this problem will significantly expand the range of methods for constructing and analyzing scheme in information protection systems. The purpose of research is to find easily measurable characteristics of substitutions, allowing to evaluate their quality, and also measures of the proximity of a particular substitutions to a random one, or its distance from it. For this purpose, several characteristics were proposed in this work: difference and polynomial, and their mathematical expectation was found, as well as variance for the difference characteristic. This allows us to make a conclusion about its quality by comparing the result of calculating the characteristic for a particular substitution with the calculated mathematical expectation. From a computational point of view, the thesises of the article are of exceptional interest due to the simplicity of the algorithm for quantifying the quality of bijective function substitutions. By its nature, the operation of calculating the difference characteristic carries out a simple summation of integer terms in a fixed and small range. Such an operation, both in the modern and in the prospective element base, is embedded in the logic of a wide range of functional elements, especially when implementing computational actions in the optical range, or on other carriers related to the field of nanotechnology.

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