Θεωρητική διερεύνηση και αριθμητική μοντελοποίηση της ταλαντωτικής συμπεριφοράς στροφαλοφόρου άξονα

Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Ναυτική και Θαλάσσια Τεχνολογία και Επιστήμη

Néhány adat a Keleti-Cserhát és tágabb környéke edényes flórájának ismeretéhez.

Jelen közlemény az elmúlt időszak során, elsősorban alkalmi terepbejárások alkalmával, valamint a Magyar Flóratérképezés program során gyűjtött érdekesebb adatainkat tartalmazza. Adataink a Keleti-, vagy Központi-Cserhát területéről, illetve ettől távolabbi és szomszédos, más természetföldrajzi egységekbe sorolható területekről (Ipoly-völgy, Cseres-hegység magyarországi része, Litke-Etesi-dombság, Zagyvavölgy) származnak. A terület természetföldrajzi jellemzését és a botanikai kutatás történetét HARMOS és mtsai (2001) és CSIKY és mtsai (1999) vázolta

Adverse Childhood Experiences and Combat-Related PTSD

The purpose of this project was to conduct a literature review of the empirical research on adverse childhood experiences (ACE) and combat-related posttraumatic stress disorder (PTSD) by examining whether ACE affects combat-related PTSD prevalence and severity, protective factors, as well as current practices for assessing ACE in combat veterans. A literature search to identify studies published between 1987 and 2015 yielded a total of 53 articles that met the inclusion criteria and were reviewed. The existing literature reveals that ACE was experienced by a significant number of combat veterans with PTSD. It further showed that preventive and early intervention assessments and treatments should be implemented for combat veterans upon return from deployment and when seeking treatment for PTSD and PTSD-related mental health problems. Future research should focus on the importance and value of assessment of all lifetime trauma, not simply combat-exposure related trauma. \ud Keywords: posttraumatic stress disorder (PTSD), adverse childhood experiences (ACE), combat veterans, protective factors, predictors, screening, assessmentsSocial Wor

Pareto optimal matchings in many-to-many markets with ties

We consider Pareto optimal matchings (POMs) in a many-to-many market of applicants and courses where applicants have preferences, which may include ties, over individual courses and lexicographic preferences over sets of courses. Since this is the most general setting examined so far in the literature, our work unifies and generalizes several known results. Specifically, we characterize POMs and introduce the Generalized Serial Dictatorship Mechanism with Ties (GSDT) that effectively handles ties via properties of network flows. We show that GSDT can generate all POMs using different priority orderings over the applicants, but it satisfies truthfulness only for certain such orderings. This shortcoming is not specific to our mechanism; we show that any mechanism generating all POMs in our setting is prone to strategic manipulation. This is in contrast to the one-to-one case (with or without ties), for which truthful mechanisms generating all POMs do exist

Tablero simulador para prácticas con controladores lógicos programables (PLC)

1 archivo PDF (53 páginas)Diseño y construcción de un tablero simulador para prácticas con controladores lógicos programables, el cual permite generar y visualizar las señales más comunes que se manejan en un PLC. El equipo fue diseñado de tal forma que su reproducción y mantenimiento fuesen sencillos y de bajo costo, así como protegiendo al controlador de errores de conexión comunes durante el aprendizaje. Este documento contiene el manual de usuario, así como la descripción del diseño y la construcción del tablero

Keménylombos fafajok technológiai porainak morfológiája és munkaegészségügyi összefüggései = Morphology and labour hygiene of technological dust of sclerophyllous wood species

Teljes egészében feldolgozásra került a témával összefüggő hazai és nemzetközi irodalom. A keménylombos faporokkal kapcsolatos eddigi kutatási eredményeket rendszerezve foglaltuk össze és megadtuk a keménylombos fafajok anyagjellemzőit. Egyedülálló módon adtuk meg a vizsgált akácfa, tölgyfa, bükkfa és forgácslap porok durva és finompor tartományának szemcseösszetételét, különös tekintettel a rákkeltő hatással összefüggő respirábilis tartományra. Szálló porok kinematikai vizsgálatához, a lebegtetési sebesség méréséhez kísérleti berendezést terveztünk és kiviteleztünk. A faporok respirábilis tartományának morfológiai vizsgálata számos új eredményt adott, amelyek elsősorban a porelszívási technológiák fejlesztését szolgálják. Egyedülálló módon foglaltuk össze a faipari forgácsoló gépeket és forgácsolási paramétereket, valamint a porképződéssel összefüggésben meghatároztuk a szálló porok és a gépkonstrukció kapcsolatát. Különös alapossággal vizsgáltuk meg a gép és az elszívórendszer kapcsolatát (elsősorban CNC megmunkáló központokra). Az eredmények felhasználásával a gépkonstruktőrök és üzemeltetők sikerrel csökkentették a munkahelyi levegő portartalmát és ezen keresztül az egészségkárosító hatást. Megvizsgáltuk a levegő visszatáplálásnak a pormérlegre gyakorolt hatását és javaslatot fogalmaztunk meg egy hatékony rendszer kialakítására. | The whole internal and international bibliography related to the research subject was revised and worked up. Previous research results in the hardwood dust field were systematically surveyed and the material characteristics of hardwood species were summarized. The granulometric composition of coarse and fine dust fractions developed during the hardwood species machining was established expansively. A special accent was put on the respiring fraction which is related to the carcinogenic effect of the wood dusts. The analyzed species were as follows: black locust (Robinia pseudoacacia), oak (Quercus sp.), beech (Fagus silvatica) and a particleboard made from hardwoods respectively. An experimental equipment was designed and realized for kinematical tests and floating velocity determination of floating dusts. Morphological test of the inhalation wood dust fraction revealed several new results, which can be utilized primary in the development of exhausting technologies. The wood machines and cutting parameters were summarized uniquely. The relationship between the floating dust development and machine construction was established. The interrelation between the machine and exhausting system was analyzed (primary for a centre with computer numerical control). The results were successfully utilized by design engineers and users to decrease the dust content of the air in the working area. This leads to the health damage effect modification

Pareto optimality in many-to-many matching problems

Consider a many-to-many matching market that involves two finite disjoint sets, a set A of applicants and a set C of courses. Each applicant has preferences on the different sets of courses she can attend, while each course has a quota of applicants that it can admit. In this paper, we examine Pareto optimal matchings (briefly POM) in the context of such markets, that can also incorporate additional constraints, e.g., each course bearing some cost and each applicant having a limited budget available. We provide necessary and sufficient conditions for a many-to-many matching to be Pareto optimal and show that checking whether a given matching is Pareto optimal can be accomplished in 0(1 A 12 I C 12) time. Moreover, we provide a generalized version of serial dictatorship, which can be used to obtain any many-to-many POM. We also study some structural questions related to POM. We show that, unlike in the one-to-one case, finding a maximum cardinality POM is NP-hard for many-to-many markets. (C) 2014 Elsevier B.V. All rights reserved

Conjunctions of Among Constraints

Many existing global constraints can be encoded as a conjunction of among constraints. An among constraint holds if the number of the variables in its scope whose value belongs to a prespecified set, which we call its range, is within some given bounds. It is known that domain filtering algorithms can benefit from reasoning about the interaction of among constraints so that values can be filtered out taking into consideration several among constraints simultaneously. The present pa- per embarks into a systematic investigation on the circumstances under which it is possible to obtain efficient and complete domain filtering algorithms for conjunctions of among constraints. We start by observing that restrictions on both the scope and the range of the among constraints are necessary to obtain meaningful results. Then, we derive a domain flow-based filtering algorithm and present several applications. In particular, it is shown that the algorithm unifies and generalizes several previous existing results.Comment: 15 pages plus appendi

Studies of Diffuse Interstellar Bands. V. Pairwise Correlations of Eight Strong DIBs and Neutral Hydrogen, Molecular Hydrogen, and Color Excess

We establish correlations between equivalent widths of eight diffuse interstellar bands (DIBs), and examine their correlations with atomic hydrogen, molecular hydrogen, and EB-V . The DIBs are centered at \lambda\lambda 5780.5, 6204.5, 6283.8, 6196.0, 6613.6, 5705.1, 5797.1, and 5487.7, in decreasing order of Pearson\^as correlation coefficient with N(H) (here defined as the column density of neutral hydrogen), ranging from 0.96 to 0.82. We find the equivalent width of \lambda 5780.5 is better correlated with column densities of H than with E(B-V) or H2, confirming earlier results based on smaller datasets. We show the same is true for six of the seven other DIBs presented here. Despite this similarity, the eight strong DIBs chosen are not well enough correlated with each other to suggest they come from the same carrier. We further conclude that these eight DIBs are more likely to be associated with H than with H2, and hence are not preferentially located in the densest, most UV shielded parts of interstellar clouds. We suggest they arise from different molecules found in diffuse H regions with very little H (molecular fraction f<0.01). Of the 133 stars with available data in our study, there are three with significantly weaker \lambda 5780.5 than our mean H-5780.5 relationship, all of which are in regions of high radiation fields, as previously noted by Herbig. The correlations will be useful in deriving interstellar parameters when direct methods are not available. For instance, with care, the value of N(H) can be derived from W{\lambda}(5780.5).Comment: Accepted for publication in The Astrophysical Journal; 37 pages, 11 figures, 6 table