On the accuracy of position of the linear secular resonance g − g5 in the proper elements’ space

2020 ◽  
Vol 497 (4) ◽  
pp. 4921-4936
Author(s):  
Zoran Knežević
Keyword(s):  
Resonant State ◽  
Resonance Position ◽  
Secular Resonance ◽  
New Approach ◽  
Cycle Slips ◽  
Proper Elements ◽  
Polynomial Fit ◽  
Depth Analysis ◽  
Proper Values

ABSTRACT An in-depth analysis is presented of the accuracy of position of the linear secular resonance g − g5 in the phase space of proper elements, as determined by the recently introduced polynomial fit method. Different attempts to pinpoint the exact location of this resonance are described, leading to improvement in the accuracy of resonance position achieved via local adjustments of the new method and measured in comparison with the corresponding positions of selected asteroids. The resonant state and proper frequencies of the longitude of perihelion of these asteroids are determined, and compared to the catalogue values computed in the course of determination of their synthetic proper elements. The problem of cycle slips, affecting the computation of frequencies, is thoroughly examined and successfully explained, and the procedure of double filtering of the time series of proper values to remove the cycle slips proposed. The results of tests of the new approach have shown that the accuracy of newly determined frequencies is significantly improved with respect to the previously available values.

scholarly journals Survey of secular resonances in the asteroid belt

2021 ◽  
pp. 4-4
Author(s):  
Z. Knezevic
Keyword(s):  
Asteroid Belt ◽  
Secular Resonance ◽  
Secular Resonances ◽  
Mean Motion Resonances ◽  
Fundamental Frequencies ◽  
Cycle Slips ◽  
Polynomial Fit ◽  
Special Cases ◽  
Order Four ◽  
Future Work

Using a recently introduced synthetic method to compute the asteroid secular frequencies (Knezevic and Milani 2019), in this paper we survey the locations of secular resonances in the 9 dynamically distinct zones of the asteroid belt. Positions of all resonances up to order four, of a significant fraction of the order six resonances, and of a several order eight ones were determined, plotted in the space of proper elements, and discussed in relation to the local dynamics and to the structure and shape of the nearby asteroid collisional families. Only the resonant combinations with fundamental frequencies of Jupiter and Saturn were considered, with a few special cases involving other planets and largest asteroids. Accuracy of the polynomial fit to determine the frequencies was found to be satisfactory for the purpose of determination of secular resonance positions. This enabled a precise identification of dynamical mechanisms affecting the computation of frequencies (close vicinity of the mean motion resonances and libration in secular resonances), and of the \cycle slips" as a primary technical drawback causing deterioration of the results. For each zone we also presented and discussed a fairly complete sample of recent works dealing with interaction of the secular resonances with asteroid families present in that zone. Finally, a few words were devoted to possibilities for future work.

The Dudley Lee Case: A new approach to factual causation and its implications for transformative jurisprudence

2017 ◽  
Vol 30 (1) ◽  
pp. 273-289
Author(s):  
Anmari Meerkotter
Keyword(s):  
Case Note ◽  
Constitutional Court ◽  
Recent Contribution ◽  
New Approach ◽  
State Accountability ◽  
The Law ◽  
Transformative Impact ◽  
Constitutional Jurisprudence ◽  
Law Of Delict

The Constitutional Court (CC) judgment of Lee v Minister of Correction Services 2013 2SA 144 (CC) is a recent contribution to transformative constitutional jurisprudence in the field of the law of delict. This matter turned on the issue of factual causation in the context of wrongful and negligent systemic omissions by the state. In this case note, I explore the law relating to this element of delictual liability with specific regard to the traditional test for factual causation – the conditio sine qua non (‘but-for’) test. In particular, I note the problems occasioned by formalistic adherence to this test in the context of systemic state omissions as evidenced by the SCA judgment in the same matter. I also consider the manner in which English courts have addressed this problem. Thereafter, I analyse the CC’s broader approach to the determination of factual causation as one based on common sense and justice. I argue that this approach endorses a break from a formalistic application of the test and constitutes a step towards an approach which resonates with the foundational constitutional values of freedom, dignity and equality. Furthermore, it presents an appropriate solution to the problems associated with factual causation where systemic omissions are concerned. I then consider the transformative impact of the Lee judgment. In particular, I argue that the broader enquiry favoured by the CC facilitates the realisation of constitutionally guaranteed state accountability, and amounts to an extension of the existing norm of accountability jurisprudence. Hence, I contend that the judgment presents a further effort by the Constitutional Court to effect wholesale the constitutionalisation of the law of delict, as well as a vindicatory tool to be used by litigants who have been adversely affected by systemic state omissions.

Automatic Determination of Optimal FIB Operations for Improved Circuit Probing and Fast Reconfiguration

2000 ◽  
Author(s):  
Romain Desplats ◽  
Timothee Dargnies ◽  
Jean-Christophe Courrege ◽  
Philippe Perdu ◽  
Jean-Louis Noullet
Keyword(s):  
Integrated Circuit ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Semiconductor Devices ◽  
Front Side ◽  
Automatic Determination ◽  
Metal Line ◽  
New Approach ◽  
Metal Layers

Abstract Focused Ion Beam (FIB) tools are widely used for Integrated Circuit (IC) debug and repair. With the increasing density of recent semiconductor devices, FIB operations are increasingly challenged, requiring access through 4 or more metal layers to reach a metal line of interest. In some cases, accessibility from the front side, through these metal layers, is so limited that backside FIB operations appear to be the most appropriate approach. The questions to be resolved before starting frontside or backside FIB operations on a device are: 1. Is it do-able, are the metal lines accessible? 2. What is the optimal positioning (e.g. accessing a metal 2 line is much faster and easier than digging down to a metal 6 line)? (for the backside) 3. What risk, time and cost are involved in FIB operations? In this paper, we will present a new approach, which allows the FIB user or designer to calculate the optimal FIB operation for debug and IC repair. It automatically selects the fastest and easiest milling and deposition FIB operations.

ANALYSIS OF ACCOMPANYING PATHOLOGIES IN WOMEN WITH VARIOUS DISORDERS OF THE MENSTRUAL CYCLE

2020 ◽  
pp. 33-43
Author(s):  
Ольга Александровна Судакова ◽  
Михаил Вадимович Фролов ◽  
Алина Сергеевна Позднякова ◽  
Евгений Владимирович Белов ◽  
Данаил Красимирович Назлиев
Keyword(s):  
Antenatal Clinic ◽  
Reproductive Age ◽  
General Will ◽  
Organ Systems ◽  
Depth Analysis ◽  
Menstrual Irregularities ◽  
Positive Effect ◽  
Female Genital ◽  
Number Of Authors

Статья посвящена изучению сопутствующей патологии, у женщин репродуктивного возраста, обращающихся в стационар с жалобами на нарушения менструального цикла (НМЦ). Актуальность данной тематики не вызывает сомнения, так как с каждым годом в России и во всем мире регистрируется все большее количество случаев НМЦ. По мнению ряда авторов, данные нарушения могут составлять до 50% всех патологий женской половой сферы. Большой интерес представляет и изучение ряда сопутствующих заболеваний, которые могут отягощать течение НМЦ или наоборот, приводить к их развитию. Целью работы стал анализ разнообразной сопутствующей патологии при НМЦ, с выявлением основных причин нарушений менструального цикла у женщин фертильного возраста. Объектами исследования стали 300 пациенток, с диагнозом НМЦ, которые были разделены на 3 группы, в зависимости от уровня лечебного учреждения, где они проходили обследование - по 100 пациенток: проходивших обследование в больнице скорой медицинской помощи, обследующиеся в женской консультации и проходящие лечение сопутствующей онкопатологии в областном онкологическом диспансере. В дальнейшем проводилась дополнительное деление в каждой группе на 2 подгруппы, в зависимости от того был ли НМЦ впервые выявленным или повторно выявленным. В самой работе проводился подробный анализ сопутствующей патологии у женщин в зависимости от группы и их возраста. Определялись не только «пораженные» системы органов, но и проводился углубленный анализ по нозологиям. Работа интересна еще и тем, что в ней у всех пациенток на протяжении исследования определялся уровень стресса и наличие возможных депрессивных состояний. Определение наиболее вероятных причин НМЦ стало завершающим этапом исследования. Полученные данные могут приблизить практикующих акушеров-гинекологов к более полному пониманию различных нарушений менструального цикла, что в целом, положительно скажется на качестве и эффективности оказываемой медицинской помощи The article is devoted to the study of concomitant pathology in women of reproductive age who go to the hospital with complaints of menstrual irregularities (NMC). The relevance of this topic is beyond doubt, since every year in Russia and around the world an increasing number of cases of NMC are registered. According to a number of authors, these violations can account for up to 50% of all pathologies of the female genital area. Of great interest is the study of a number of concomitant diseases that can aggravate the course of NMC or, conversely, lead to their development. The aim of the work was to analyze a variety of concomitant pathologies in NMC, with the identification of the main causes of menstrual irregularities in women of fertile age. The objects of the study were 300 patients diagnosed with NMC, who were divided into 3 groups, depending on the level of the medical institution where they were examined - 100 patients each: who were examined in an emergency hospital, examined in an antenatal clinic and undergoing treatment for concomitant oncopathology in the regional oncological dispensary. Subsequently, an additional division was carried out in each group into 2 subgroups, depending on whether the NMC was newly detected or re-identified. In the work itself, a detailed analysis of comorbidities in women was carried out, depending on the group and their age. Not only the "affected" organ systems were identified, but an in-depth analysis of nosologies was also carried out. The work is also interesting in that during the study the level of stress and the presence of possible depressive states were determined in all patients. Determination of the most probable causes of NMC was the final stage of the study. The data obtained can bring practicing obstetricians and gynecologists closer to a more complete understanding of various menstrual irregularities, which, in general, will have a positive effect on the quality and effectiveness of medical care

scholarly journals New Method for Analysis of the Temporomandibular Joint Using Cone Beam Computed Tomography

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3070
Author(s):  
Sebastian Iwaszenko ◽  
Jakub Munk ◽  
Stefan Baron ◽  
Adam Smoliński
Keyword(s):  
Computed Tomography ◽  
Temporomandibular Joint ◽  
Cross Section ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Section Plane ◽  
New Approach ◽  
Volume Of Interest ◽  
Gap Width

Modern dentistry commonly uses a variety of imaging methods to support diagnosis and treatment. Among them, cone beam computed tomography (CBCT) is particularly useful in presenting head structures, such as the temporomandibular joint (TMJ). The determination of the morphology of the joint is an important part of the diagnosis as well as the monitoring of the treatment results. It can be accomplished by measurement of the TMJ gap width at three selected places, taken at a specific cross-section. This study presents a new approach to these measurements. First, the CBCT images are denoised using curvilinear methods, and the volume of interest is determined. Then, the orientation of the vertical cross-section plane is computed based on segmented axial sections of the TMJ head. Finally, the cross-section plane is used to determine the standardized locations, at which the width of the gap between condyle and fossa is measured. The elaborated method was tested on selected TMJ CBCT scans with satisfactory results. The proposed solution lays the basis for the development of an autonomous method of TMJ index identification.

scholarly journals Is Investing in Companies Manufacturing Solar Components a Lucrative Business? A Decision Tree Based Analysis

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 499
Author(s):  
Sebastian Klaudiusz Tomczak ◽  
Anna Skowrońska-Szmer ◽  
Jan Jakub Szczygielski
Keyword(s):  
Renewable Energy ◽  
Energy Production ◽  
Manufacturing Sector ◽  
Energy Systems ◽  
Product Portfolio ◽  
New Approach ◽  
Renewable Energy Systems ◽  
Pv Systems ◽  
Depth Analysis ◽  
A Company

In an era of increasing energy production from renewable sources, the demand for components for renewable energy systems has dramatically increased. Consequently, managers and investors are interested in knowing whether a company associated with the semiconductor and related device manufacturing sector, especially the photovoltaic (PV) systems manufacturers, is a money-making business. We apply a new approach that extends prior research by applying decision trees (DTs) to identify ratios (i.e., indicators), which discriminate between companies within the sector that do (designated as “green”) and do not (“red”) produce elements of PV systems. Our results indicate that on the basis of selected ratios, green companies can be distinguished from the red companies without an in-depth analysis of the product portfolio. We also find that green companies, especially operating in China are characterized by lower financial performance, thus providing a negative (and unexpected) answer to the question posed in the title.

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