124 research outputs found
Modeling Ice Shedding Propagation on Transmission Lines with or without Interphase Spacers
No full textIce shedding propagation on a single conductor and on a circuit of three conductors in a vertical configuration where conductors are linked with interphase spacers was modeled numerically. Several concentrated loads acting along the loaded span modeled the ice, and the shedding propagation was then simulated through the removal in a defined sequence of these concentrated loads. The model determines conductor displacement and the variation of conductor tension during the vibration following ice shedding propagation; and, thus, it predicts conductor rebound height, tension peak, and to what extent the conductor clearance is reduced during vibration. Ice shedding propagation on the full-scale test line of Hydro-Quebec was considered, and the model was validated by comparing simulation results to former experimental observations. The results show that the application of spacers reduces the severity of vibration considerably, and consequently increases the conductor clearance and reduces the risk of flashover. The dynamic effects of different shedding processes were also compared. The rebound height is the greatest for a single conductor when ice detachment propagates along the conductor, but then ice falls suddenly as a big chunk. However, the consequences of sudden detachment and shedding are obtained as the most severe when conductors are linked with spacers
Vibration of Bundled Conductors Following Ice Shedding
No full textThe dynamic behavior of bundled conductors following ice shedding from one subconductor is examined numerically using the finite-element method. An existing model of ice shedding from a single conductor is improved by developing a model of spacers which connect subconductors in the span. The resulting system makes it possible to simulate vibrations following ice shedding from one span of an overhead transmission line with twin, triple, or quad bundles. Vibration characteristics are evaluated as the following parameters are varied: thickness of shed ice, distance between adjacent spacers, and number of subconductors in the bundle. Simulation results will provide information on how the amplitude of vibration and the transient dynamic forces change with the application of spacers. The maximum jump height of the ice-shedding cable, the maximum drop of the loaded cable, and the maximum cable tension are approximated as power functions of ice thickness and the distance between adjacent spacers
The sociocultural construction of urban wasteland: Mapping of the Antwerp Southside
No full textAny process of growth, decline and transformation can be understood from a spatial reading, unraveling the traces left on the ground and observing elements temporarily unable to adapt to the flow of time: wasteland. The concept of wasteland is an artificial ‘construction’ usually linked to the idea of (un)productivity. As society changes, the productive use of land changes through time. This chapter aims to reveal the cumulative alternation of western perception in land use value. The means to read this shift is the historical cartographic analysis on the Southside of Antwerp (Belgium). As constructions of reality, maps are loaded with intentions and interpretations of the culture in which they are produced. In particular, the historical mapping of wastelands generated by industrial and agricultural production focuses on understanding the evolution in interpreting fundamental issues such as time, processes and changes related to land ownership.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care. Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Environmental Technology and Desig
Pherbellia jalili Mortelmans & Kazerani 2020, sp. nov.
No full textPherbellia jalili Mortelmans & Kazerani sp. nov. (Figs. 2 – 5) Holotype: ♂ Iran, Golestan Province, Shast-Kola forests, 36°44’12’’N, 54°24’15’’E, 814 m, pan trap, 10.vi.2017, Farzaneh Kazerani leg., [IMBGI]. Paratypes: 2♂, Iran, Golestan Province, Shast-Kola forests, 36°43’10”N, 54°24’17”E, 817 m, net-sweeping, 10.vi.2017, Farzaneh Kazerani leg [one was completely crushed for barcoding; the other is in the personal collection of the second author]; 2♀, Iran, Golestan Province, Shast-Kola forests, 36°43’10’’N, 54°24’17’’E, 817 m, net-sweeping, 10.vi.2017, Farzaneh Kazerani leg [IMBGI]; 2♂, Iran, Golestan Province, Shast-Kola forests, 36°43’00.7”N, 54°23’13.7’’E, 1271 m, pan traps, 12.vi.2017, Farzaneh Kazerani leg [IMBGI]; 2♀, Iran: Mazanda- ran Province, Neka forests, 36°21ʹ43.03”N, 53°32ʹ56.7’’E, 1495 m, net-sweeping, 15.vii.2018, Farzaneh Kazerani leg [IMBGI]. Diagnosis: This new species of Pherbellia is similar to P. annulipes but differs in the color of the femora, black in P. annulipes, yellow in P. jalili. Especially in the shape of the surstyli is characteristic: rounded in P. annulipes, blunt in P. jalili. FIG 2. Lateral view of a male paratype of Pherbellia jalili. FIG 3. Detailed lateral view of a male paratype of Pherbellia jalili, showing especially the setulation on the pleura. FIG 4. Lateral view of andrium of a male paratype of P. jalili. Scale bar = 0.5 mm. FIG 5. Ventral view of andrium of a male paratype of P. jalili. Scale bar = 0.5 mm. Description: Body length 4.21 mm (excluding antennae); wing length 4.17 mm. Head: Ground color yellow except upper 2/3 of occiput, frontal vitta, ocellar triangle, eye margins, and orbital plates dark brown with grayish pubescence (Fig. 2). Frontal vitta subshining, nearly as broad as ocellar triangle and pointed anteriorly, not reaching half the distance from anteriormost point of ocellar triangle to anterior margin of frons. Face concave in lateral view. Oral margin slightly protruding. Two orbital setae, anterior seta about 2/3 the length of posterior seta. Antennae yellowish. Scape short, yellowish. Pedicel oval, yellow with short black seta, darkened in the apical half. Arista implanted at basodorsal margin of flagellomere. Arista yellow, twice as long as height of yellow flagellomere, with uniformly short, sparse setulae to apex, setulae barely longer than arista at base. Face and gena silvery white, gena about 1/4 height of the eye. Palpus entirely yellow. Proboscis yellow. Thorax and abdomen: Scutum dark brown, dusted gray, covered by hairlike black setulae and with a grayish median stripe and a pair of broad, grayish, pruinose dorsocentral stripes; scutellum uniformly grayish pubescent with broad median brown stripe. Pleura dark brown, dusted grayish golden; proepisternum yellow with one ventral seta; anepisternum yellow with brown stripe on upper margin, bare except for 2–3 setulae ventral to the anterior spiracle; anepimeron with two strong setae and a cluster of 4–5 short setulae; katepisternum setulose (Fig. 3). Mesonotal chaetotaxy: two strong humeral, four notopleurals, two presutural supra-alar, four postsutural supra-alars, four dorsocentrals, two acrostichal, and four scutellars (two basal, two apical). Halter base and stem yellowish with knob slightly infuscated. Calypter small and dark, its margin yellow, with several long yellow setae. All pleura with slight yellowish pubescence. Abdomen yellow except for brown anterior margins of each tergite, these brown bands covered with gray pubescence. All sternites dull grayish, without distinct markings, covered with hairlike black setulae. Legs: Fore coxa yellow with shiny silvery pubescence and a few strong setae, mid and hind coxa yellow with dull white pubescence. Fore femur yellow in anterior and posterior lateral view, dorsal side and apex slightly black, mid- and hind femur yellow, apex darkened. Fore tibia mainly black, slightly yellowish at the base, mid tibia yellow and slightly darkened apically, hind tibia yellow, darkened at the base and apex; fore tarsus black, basitarsus white, mid and hind tarsomeres white. Wing: heavily darkened along costal margin and crossveins, apex slightly darkened. Vein A 1 +CuA 2 reaching wing margin. All veins black except vein Sc yellow. Genital apparatus: Epandrium rounded. Cerci small, yellow. Posterior surstyli large, broader in apical half, triangular with blunt apex, covered with dense black setae, anterior surstyli small, triangular, apex with several short black setae. Both pairs of surstyli protruded ventrally below the andrium (Fig. 3, 4). Female: Similar to male except for more extensively black forefemur and foretarsus. Etymology: The species is named after Prof. Adel Jalili (Research Institute of Forests and Rangelands) for his prominent supporting role in biodiversity studies in Iran. Distribution: Pherbellia jalili is known only from the Hyrcanean forest in Iran, (Fig. 1). Ecology: Nothing is known of the biology of P. jalili except that adults dwell in the Hyrcanean deciduous forests and is probably a typical representative of deciduous forests. This ecoregion in northern Iran lies in a mountainous humid zone and is covered with temperate deciduous forests, known to hold high degrees of endemism (Kazerani et al. 2016).Published as part of Kazerani, Farzaneh, Mortelmans, Jonas, Farashiani, Mohammad Ebrahim & Thorn, Simon, 2020, A new species of Pherbellia (Diptera: Sciomyzidae) from Iran, pp. 361-370 in Zootaxa 4772 (2) on pages 363-366, DOI: 10.11646/zootaxa.4772.2.7, http://zenodo.org/record/381656
Corrigendum to “The effect of topical endometrial scratching on pregnancy outcome in women with previous failure of intrauterine insemination: A non-randomized clinical trial” [Int J Reprod BioMed 2021; 19: 465-470]
No full textThe publisher has been informed of an error that occurred on page 465 in which the first author affiliation order is incorrect and should be replaced with each other. On behalf of the author, the publisher wishes to apologize for this error. The online version of article has been updated on 31 March 2024 and can be found at https://doi.org/10.18502/ijrm.v19i5.9256
Dataset Characteristics for Reliable Code Authorship Attribution
No full textCode authorship attribution aims to identify the author of software source code according to the author's unique coding style characteristics. The lack of benchmark data in the field, forced researchers to employ various resources that often did not reflect real programming practices. Throughout the years, research studies have used textbook examples, students' programming assignments, faculty code samples, code from programming competitions and files retrieved from open-source repositories as research objects. The diversity of the data raised concerns about the feasibility of capturing the appropriate data characteristics to reliably evaluate code attribution. In this paper, we investigate these concerns and analyze the effect of the dataset characteristics and feature elimination techniques on the accuracy of code attribution. Unlike the majority of the work done in this field, which mainly concentrates on designing new features, we explore the nature of the data used in previous studies and assess the factors that influence the attribution task. Within this analysis, we investigate the robustness of three feature sets regarded as reliable benchmarks in the attribution research. Based on our findings, we define a process for deriving a reduced set of features for accurate and predictable attribution and make recommendations on the dataset characteristics
The attenuation of pain behaviour and serum interleukin-6 concentration by nimesulide in a rat model of neuropathic pain Author's personal copy
No full texta b s t r a c t Background: Evidence for a role of immune system in hyperalgesic pain states is increasing. Recent work in neuroimmunology suggests that the immune system does more than simply perform its well known functions of recognizing and removing invading pathogens and tumors. Interest in neuroinflammation and neuroimmune activation has grown rapidly in recent years with the recognition of the role of central nervous system inflammatiom and immune responses in the aetiology of pain states. Among various theories, the role of inflammatory responses of the injured nerve has recently received attention. Cytokines are heterogenous group of polypeptides that activate the immune system and mediate inflammatory responses, acting on a variety of tissue, including the peripheral and central nervous system. Interleukin-6 (IL-6) a pro-inflammatory cytokine, is potentially important in pain aetiology, have pronociceptive actions. Neuropathic pain may be due to a primary insult to the peripheral or central nervous system. Substances released during inflammation from immune cells play an important role in the development and maintenance of chronic pain. Nimesulide, a highly selective cox-2 inhibitor, effectively reduces hyperalgesia due to peripherally administration of inflammatory agents like formalin. The safety of nimesulide was reported for some conditions in which other NSAIDs are contraindicated. Here we have determined the effect of nimesulide on pain behaviour and serum IL-6 level in chronic constriction injury (CCI) model of neuropathic pain. Methods: Experiments were carried out on male Wistar rats, (weight 150-200 g, n = 8). Rats were divided into 3 different groups: 1-CCI + saline 0.9% 2-Sham + saline 0.9% (control) 3-CCI + drug. Nimesulide (1.25, 2.5, 5 mg/kg, i.p.) was injected 1h before surgery and continued daily to day 14 post-ligation. 42 • C water for thermal hyperalgesia, von Frey filaments for mechanical allodynia, acetone test for cool allodynia and 10 • C water for cold hyperalgesia were respectively used as pain behavioural tests. Behavioural tests were recorded before surgery and on postoperative days 1, 3, 5, 7, 10, 14 and the serum concentration of IL-6 was determined at the day 14. Results: The results of this study showed a decrease in hyperalgesia and allodynia following nimesulide administration. Conclusions: It appears that nimesulide was able to reduce pain behaviour due to nerve inflammation and a parallel decrease in the serum IL-6 concentration was observed. Implications: The immune system is an important mediator in the cascade of events that ultimately results in hyperalgesia. Cytokines contribute to the patheogenesis of neuropathic pain, therefore drugs that inhibit cytokine release from immune cells may reduce inflammatory pain states
Heroin addiction among women, 1981
No full textProblem and Purpose: This study is concerned with the problem of addiction among female patients of two clinics located in Atlanta metropolitan area: (1) The Midtown Intake and Treatment Center, (2) The Synthesis West Treatment Center. The main variables in this study are as follows: a. Personal characteristics such as: age, education, marital status. b. Behavioral characteristics such as: age at first drug experience, criminal behavior, admission status. c. Family background such as: socioeconomic status of parents, family disorganization and drug dependency, and place of residence. This study was designed to investigate and describe specific aspects of the variables mentioned above about the female heroin addict and to determine whether or not the information agrees with the previous researches. Procedures The data were obtained by administration of a questionnaire to fourty-six female patients of the two mentioned clinics. The paper discusses data collection procedures, results, scope of the study, findings and finally, suggestions for further study. Results In most of the areas, the findings agree with the previous researches. Important findings with respect to the family background are the following: 1. Most of the respondents' fathers are skilled or semiskilled workers. 2. A large proportion of respondents have been raised in families living in urban areas. 3. Respondents have been raised often in families in which at least one member of them had a history of drug or alcohol use. Important finding relating to personal characteristics are the following: 1. Females have become addicts at earlier ages in more recent years. In fact, most had their first drug experience between ages 13 to 18 years. 2. Most of the respondents have high school level of education but a good number of them become dropouts. 3. Respondents seem to have more stable marriages than their parents. Important findings relating to behavioral characteristics: 1. First drug experience was experienced with friends. 2. A good number of respondents admitted that they committed a crime during their heroin addiction and most of them categorized their crime as prostitution. 3. More than 80 percent of respondents voluntarily committed themselves to the clinics for treatment
Masculinity & Materiality: The Journal of the Editor and his Environs
No full textFull Text is available to authenticated members of The University of Auckland only.Masculinity & Materiality postulates that the Man disciplines architecture to design and decimate the human condition. In Queer Space: Architecture and Same-Sex Desire (1997), acclaimed theorist Aaron Betsky urges for gay men to validate their existence towards others who share their taste, and eventually put a show on to the world.1 Predispositions of binary thought, hegemony and institutionalisation are in fact rigid diatribes used by the Man to fragment and sublimate an entity to the verge of unbeknown corruption. However, within these confines, a subject can collect and exploit these dissensions as tools of exaltation and empowerment. The author of Masculinity & Materiality, known as The Editor, no longer expels his desire or disgust, and instead expels himself into this document,2 spilling discernable and dimensional communications within its pages. To be able to curate the virtuosities and controversies of masculine behaviour, The Editor intervenes in the practices ingrained within both the architecture of the premodern and the contemporary, and the heteronormative and homonormative dialects of men. This document posits the chaotic matters of queer men into a domain of both recognition and artifice. These matters confess a series of discrete microcosms, narrating the sacredly profane disposition of an entity performed within a closeted world where one confronts his insecurity and inabilities in isolation. The sliced magazine pages, abrasive loads of sediment and cold gleaming hunks of metal produced in Masculinity & Materiality act to speculate partial views and synthesized aggregates3 of queer sexuality and its shifty, perverted and alluring environs. These places manifest destabilised and demystified orders of masculinity, revealing its hegemonic imposition upon the world and its inhabitants. While The Editor transfers these artefacts, paraphernalia, and tchotchkes into a masculine allegory, he simultaneously seeks to reconcile his identity with his practice. Documenting his abnormal, unfamiliar and strange mechanisms to observe his surroundings, The Editor will confess to a presence of intangible, concentric or inverted worlds
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