535 research outputs found
Quarantine Practices during Covid-19: Current Experiences and Strategic Prevention from Future Pandemics
No full textThis century has faced various pandemics within the couple of decades. These pandemics knocked global public health systems and opened up the gaps to grasp these outbreaks. Quarantine or isolation of the susceptible individuals is an ancient technique that has been proven very effective. This technique is however not practiced accurately for current pandemic of COVID-19, due to which the COVID-19 infection is re-occurring in most part of the world
The identity of inbetweenship : An post-colonial analysis of Navid Modiris authorship
No full textThe purpose of this essay is to examine how Navid Moodiris concept of "mellanförskap", translated by the author himself as "inbetweenship", the postcolonial we and them as well as different identity constructions are expressed in social debator Navid Modiris authorship. The notion of identity is used from a social psychological perspective and the notion of inbetweenship is based on Modiris own description of the term. The theoretical starting point for the study is the post-colonial theory with focus on Said's construction of "the Other" and Spivak and Halls thoughts on how colonialism influenced and influence today's society. The questions at issue are examined by analysis of three poems from the poem vollection Skrik om du brinner (eng. Cry if you are on fire) and two lyrics. Analysis results are presented through quotes from the texts, which are discussed and commented on the basis of how inbetweenship, we and them as well as different identities are expressed in the texts. Overall, it is mainly through themes such as family relationships, distance, generalizations and lack of limits that the investigated objects are highlighted. The clear conclusion is that it's because of the normative society that we and them, and the feeling of inbetweenship can be produced and that the criticism of this society is the underlying theme of the Modiris entire authorship.Syftet med uppsatsen är att undersöka hur mellanförskap, det postkoloniala vi och dem samt olika identitetskonstruktioner kommer till uttryck i samhällsdebattören Navid Modiris författarskap. Begreppet identitet används utifrån ett socialpsykologiskt perspektiv och mellanförskap utifrån Modiris egen beskrivning av termen. Den teoretiska utgångspunkten för studien är den postkoloniala teorin med fokus på Saids konstruktion av "de Andra" samt Spivak och Halls tankar om hur kolonialismen påverkat och påverkar dagens samhälle. Studiens frågeställningar undersöks genom analys av tre dikter från diktsamlingen Skrik om du brinner samt två låttexter. Analysresultatet presenteras genom citat från texterna, vilka diskuteras och kommenteras utifrån hur mellanförskap, vi och dem samt olika identiteter kommer till uttryck i texterna. Sammantaget är det främst genom teman som släktskap, avstånd, generaliseringar och avsaknaden av gränser som de undersökta objekten lyfts fram. Den tydliga slutsatsen är att det är på grund av det normativa samhället som vi och dem samt känslan av ett mellanförskap kan skapas samt att det är kritiken mot detta samhället som är det underliggande temat för hela Modiris författarskap
Diffractive electron mirror for use in quantum electron microscopy
No full textThesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections."February 2018." Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 66-70).Periodic atomic structures in thin crystals and artificially fabricated periodic structures in transmission gratings have long been used to coherently split electrons by means of electron diffraction for applications such as interferometry, holography and imaging. Due to their reliance on transmission through matter, however, these methods are prone to electron scattering and absorption and are therefore lossy to some extent. This loss becomes a major issue for quantum electron microscopy (QEM), an interaction-free measurement scheme with electrons as probe particles. QEM relies on single electrons completing many round trips inside an electron resonant cavity, splitting and re-coupling during each round trip, effectively multiplying the probability of loss by the number of round trips. Thus, in one of the designs for QEM, the use of reflective diffraction gratings as lossless electron beam splitters is proposed. In this thesis, diffractive electron mirrors were fabricated by integrating one-dimensional diffraction gratings with tetrode electron mirrors. Optical interference lithography was used to fabricated silicon diffraction gratings with pitches varying from 200 nm to 500 nm. Furthermore, a proof-of-principle experiment to demonstrate their function as electron mirrors inside a scanning electron microscope was developed. It was demonstrated that the constructed tetrode electron mirrors satisfied the requirements of QEM for electron energies up to 3 keV. Finally, in a similar experiment, the fabricated diffractive electron mirrors were tested to demonstrate their function as lossless beam splitters. Preliminary results point to the evidence for electron diffraction, suggesting that diffractive electron mirrors could be used as as lossless electron beam splitters for QEM and other applications.by Navid Abedzadeh.S.M
Three-dimensional CFD-DEM simulation of raceway transport phenomena in a blast furnace
No full textpeer reviewedImproving energy efficiency in a blast furnace (BF) has a significant effect on energy consumption and pollutant emission in a steel plant. In the BF, the blast injection creates a cavity, the so-called raceway, near the inlet. On the periphery of the raceway, a ring-type zone is formed which is associated with the highest coke combustion rate and temperatures in the raceway. Therefore, predicting the raceway size or in other words, the periphery of the ring-type zone with accuracy is important for estimating the BF’s energy and coke consumption. In the present study, Computational Fluid Dynamics (CFD) is coupled to Discrete Element Method (DEM) to develop a three-dimensional (3D) model featuring a gas–solid reacting flow, to study the transport phenomena inside the raceway. The model is compared to a previously developed two-dimensional (2D) model and it is shown that the assumptions associated with a 2D model, result in an overestimation of the size of the raceway. The 3D model is then used to investigate the coke particles’ combustion and heat generation and distribution in the raceway. It is shown that a higher blast flow rate is associated with a higher reaction rate and a larger raceway. A 10% increase in the inlet velocity (from 200 m/s to 220 m/s) caused the raceway volume to grow by almost 40%. The DEM model considers a radial discretization over the particle, therefore the heat and mass distributions over the particle are analyzed as well.Raceway of Blast Furnac
Management Production Systems and Timing Strategies for Cull Cows
No full textReplaced with revised version of paper 06/04/09.Cattle, cull cows, management, marketing, production systems, timing, Farm Management, Marketing,
Review and Comparison of Vision- and LiDAR-based Methods for Autonomous Vehicle Localization
No full textA robust and accurate vehicle localization is a crucial element in the field of autonomous vehicles. It is needed for trajectory and path planning, tracking, and trajectory prediction. Normally this is achieved by relying on the global navigation satellite systems, but it is not always reliable. Here vehicles sensing modalities step in and take over the task of localization. This can be achieved by detecting features in the surroundings of the vehicle and localizing the vehicle either relatively or globally. Provided, an accurate map exists consisting of expected features, it is possible to match features extracted with sensing modalities to the map and thus the vehicle is able to make sense of the surrounding environment. Another possibility is to localize the vehicle relatively, for example, lane-level localization. Usually, a camera is used as the sensing modality. It is a relatively affordable, simple, and popular sensor. But in recent decades the Light Detection and Ranging (LiDAR) is offering heavy competition to cameras because it has produced more accurate results and can be used to extract more useful information from the environment. The aim of this work is to offer a review and comparison of vehicle localization using cameras and LiDARs as sensing modalities. In most cases, map-based localization is brought out, but in some cases also relative localization is discussed. The focus of the review is on the sensors, how they are used and what are their advantages or disadvantages. The categorization in the comparison chapter is based on features with which the localization is achieved – these include lane markings, road marks, curb detection, traffic signs and landmarks. In the end, the author concludes the work with suggestions for choosing the right sensor for localization of autonomous vehicle in desired operating conditions, based on reviewed papers
hennylab/Neuronal-Convex-hull-intersection: Neuronal-Convex-hull-intersection
No full textRaw data, MATLAB scripts and data analysis from:
Geometrical factors determining dendritic domain intersection between neurons: a modeling study
Rafael Ignacio Gatica1, Trinidad Montero1, Navid Farassat2 and Pablo Henny1
1Laboratorio de Neuroanatomía, Departamento de Anatomía, and Centro Interdisciplinario de Neurociencia, NeuroUC, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
2Institute for Neurophysiology, Goethe University, Frankfurt, Germany
*Corresponding author:
E-mail: [email protected]
Finding effective parameters for mitigating traffic congestion near universities
No full textThis paper intends to assess the effect of different parameters on traffic congestion around universities. On the basis of the model outputs, it is possible to propose economic countermeasures for reducing traffic congestion, especially in developing countries. Structural equation modelling was used to assess the relevance between characteristics of students, features of different modes, environmental conditions and daily demand variations with traffic congestion. The Shahid Bahonar University of Kerman in Iran was considered as a case study. The results showed that it is necessary to decrease the demand first. For this purpose, rescheduling courses is essential to distribute classes more effectively within a week. Virtual classes can be used more frequently as a substitute for traditional on-campus courses. The probability of using buses should be increased by reducing waiting time and fares, and promoting their safety. Similarly, taxi use can be increased by improving safety and waiting time. To reduce the likelihood of using private cars, pricing strategies must establish more limitations for using university carparks.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.Pavement Engineerin
Para Pendengar Firman Turhan: Telaah Terhadap Efek Estetik al-Qur'an
No full textBuku berjudrul Gott ist schőn; Das ästhetische Erlebens des Koran ("Tuhan Maha Indah; Penghayatan Estetik terhadap al-Qur'an") yangmenjadi sentral ulasan berikut bukanlah karya pertama Navid Kermani, islamisis lran kelahiran Jerman. Buku ini asal mulanya adalah disertasi Doktor di "Orientalisches Seminar" Universitas Bonn tahun 1998. Di tahun-tahun sebelumnya Kermani sudah berperan aktif dalam meramaikan kajian al-Qur'an di Barat. Buku pertama yang dihasilkan adalah Offenbarung als Kommunikation; Das Konzept waly in Naṣr Abū Zaids Mafhūm al-Nasṣ (Wahyu sebagai Komunikasi; Telaah atas Konsep Abu Zaid tentang Wahyu dalam Mafhūm al-Nasṣ, terbit 1996). Sedangkan karya-karyanya yang lain banyak berupa artikel dibeberapa jurnal studi Islam intemasional
Road safety investigation of the interaction between driver and cyclist
No full textWith growing global concern to reduce CO2 emissions, the transportation modal shift from car to bicycle is an encouraging alternative, which is getting more popular in Europe and North America, thanks to very low impact on the environment. On the other hand, the infrastructure for cyclist should be improved, since cyclists are vulnerable road users and with an increase in the number of cyclists the concern for their safety also gets increased.
In this thesis, the analysis of accidents in which cyclists have been involved and understanding the reason for these accidents have been discussed, then the necessary requirements to design and implement a safe bicycle network is introduced.
The study focuses on the drivers’ behavior in terms of interaction with cyclists when there is a presence of a cyclist crossing. Therefore the road safety investigation on cyclist infrastructure was made with observing drivers’interaction with cyclists.
Then the time-based surrogacy measures used to investigate the safety level of the cylist, in particular PET (Post Encroachment Time) and TTC (Time to Collision) between driver and bicyclist were determing keeping in mind the right-angle collision.
Furthermore we tried to find the reaction time of the drivers especially on signals and also with the presence of cyclist on the crossing to understand the time which is needed for the driver to stop the car. All of this data could be later useful for the reconstruction of the accidents. Understanding the instants at which driver applies the brakes was made possible by installing a V-Box device inside our test vehicle which also used to determine measures such as speed, distance and other important.
Finally using mobile eye tracker the driver visual behavior when arriving the crossing point where observed and results showed that at number of situations driver’s gaze was distracted and only cyclist became an important focus only when he was at a considerable length from the crossing
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