27 research outputs found
Towards Attention-aware Foveated Rendering
No full textFoveated graphics is a promising approach to solving the bandwidth challenges of immersive virtual and augmented reality displays by exploiting the falloff in spatial acuity in the periphery of the visual field. However, the perceptual models used in these applications neglect the effects of higherlevel cognitive processing, namely the allocation of visual attention, and are thus overestimating sensitivity in the periphery in many scenarios. Here, we introduce the first attention-aware model of contrast sensitivity. We conduct user studies to measure contrast sensitivity under different attention distributions and show that sensitivity in the periphery drops significantly when the user is required to allocate attention to the fovea. We motivate the development of future foveation models with another user study and demonstrate that tolerance for foveation in the periphery is significantly higher when the user is concentrating on a task in the fovea. Analysis of our model predicts significant bandwidth savings over those afforded by current models. As such, our work forms the foundation for attention-aware foveated graphics techniques.Computer Graphics and Visualisatio
Ionization-induced star formation - IV. Triggering in bound clusters
No full textWe present a detailed study of star formation occurring in bound star-forming clouds under the influence of internal ionizing feedback from massive stars across a spectrum of cloud properties. We infer which objects are triggered by comparing our feedback simulations with control simulations in which no feedback was present. We find that feedback always results in a lower star formation efficiency and usually but not always results in a larger number of stars or clusters. Cluster mass functions are not strongly affected by feedback, but stellar mass functions are biased towards lower masses. Ionization also affects the geometrical distribution of stars in ways that are robust against projection effects, but may make the stellar associations more or less subclustered depending on the background cloud environment. We observe a prominent pillar in one simulation which is the remains of an accretion flow feeding the central ionizing cluster of its host cloud and suggest that this may be a general formation mechanism for pillars such as those observed in M16. We find that the association of stars with structures in the gas such as shells or pillars is a good but by no means foolproof indication that those stars have been triggered and we conclude overall that it is very difficult to deduce which objects have been induced to form and which formed spontaneously simply from observing the system at a single time.Peer reviewe
The Study of the Problem of Teaching Christian Moral Behavior
No full textChristian living from its inception has been challenging by the relationship between learning and moral living. The problem of this study was involved with a statement of the principles of Christian Moral Behavior and the implementation of those principles in the life activity or behavior of the individual. It was the contention of the author that the teaching process has not attained its ultimate objective until the life has been reoriented
The biogas plant Lkáň - Assessment of negative impacts on the surrounding buildings
No full textPráce se zabývá negativními vlivy bioplynové stanice Lkáň na okolní zástavbu rodinných domů. Bioplynová stanice negativně zatěžuje okolní zástavbu hlukem a částečně zápachem. Práce se zaměřuje především na problematiku hluku, jeho měření a vyhodnocování. Autor se soustřeďuje jednak na charakteristiku Zemědělského družstva Klapý, na popis bioplynové stanice a zdroje hluku z bioplynové stanice. Dále se zabývá vlivem hluku na lidský organismus, metodickým návodem pro měření a hodnocení hluku v mimopracovním prostředí a limity hluku dle příslušných norem. Praktická část obsahuje výsledky měření na vybraných místech v exteriéru u rodinných domů a v místech zdrojů hluku jednotlivých zařízení bioplynové stanice. Po korigování naměřených hodnot vychází hluk u rodinných domů ve dne 49,2 dB, 49,6 dB a limit je 50 dB. V noci 39 dB, 39,9 dB a limit je 40 dB. BPS je z hlediska hluku vyhovující, ale jen těsně pod stanovenými limity, a proto autor navrhuje dodatečné protihlukové opatření. Jednak na stávající val, který je mezi BPS a obcí, vysadit listnaté i jehličnaté stromy v pásu širokém cca 3m. Dále na zábradlí fermentoru přidat protihlukovou clonu.The thesis deals with the negative effects of biogas plant Lkáň on the neighbourhood. The biogas plant negatively affects surrounding area and houses with noise and partly with odor as well. The work focuses mainly on noise, the measurement of noise and its evaluation. The theoretical part focuses on the characterization of Zemědělské družstvo Klapý, the description of the biogas plant and the sources of noise from biogas plant. Then it deals with the influence of noise on human body, methodical instructions for measurement and with the evaluation of noise on the outside- employment area. In the theoretical part there is also evaluation of the noise limits to relevant Czech norms and regulations. The practical part of the thesis contains the results of noise measurement at selected locations around houses and biogas plant devices. After the correlation of measured values the noise near family houses is 49,2 dB, 49,6 dB during the dayand the limit is 50 dB. At night the measured noise was 39 dB, 39,9 dB with the 40 dB limit. The biogas plant is satisfactory regarding noise but just below the law limits. The author proposes additional anti-noise barriers. Firstly to plant deciduous and coniferous trees in a strip about 3 metres wide between the biogas plant and family houses. And then to install the noise barrier on the fermener's railing
Custom and interactive environments in StarLogo Nova for computational modeling
No full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (page 66).StarLogo Nova is an agent-based simulation and game programming application geared towards classroom learning. In many cases, StarLogo Nova can be an effective computational modeling tool, allowing students to apply their knowledge and gain a greater understanding of scientific concepts. However, there are many computational models that are difficult to implement in StarLogo Nova or cannot be implemented. This can be partly attributed to the fact that agents are the only programmable and customizable entity in StarLogo Nova and are limited to interactions with other agents. We expand the set of computational models possible within StarLogo Nova by adding new features and capabilities; namely an editable and programmable 3D environment for agents to interact with. We add the capability for users to program real-time interactions between agents and their environment. A dynamic and custom environment opens up the possibility for new computational models and simplifies the implementation of others.by Malcolm X. Wetzstein.M. Eng.M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Scienc
Cost estimation of building constructions during the design-phase - evaluation of necessary parameters
No full textImmer wieder wurde der Autor in seinem Arbeitsalltag mit der Frage konfrontiert, welche Grundlagen für die Kostenermittlung eines Hochbauprojektes erforderlich wären. Die komplexe Fragestellung und auch die spezielle Konstellation zwischen den verschiedenen Planungsbeteiligten und dem Kostenmanagement in einem reaktiven Prozess - in dem die Definition der Unterlagen an der Schnittstelle zwischen Planung und Kostenmanagement klar festzulegen ist - waren der Anlass, sich intensiv und umfassend mit dieser Thematik zu befassen. In der vorliegenden Dissertation werden die im Zuge einer Kostenermittlung von Hochbauprojekten im Planungsprozess zugrunde liegenden Einflussfaktoren evaluiert und in weiterer Folge definiert. Das Ergebnis dieser Arbeit stellt die Schaffung eines Standardunterlagenkataloges für die Erstellung von Kostenermittlungen im Zuge des Planungsprozesses von Hochbauprojekten dar.Im ersten Abschnitt - der Einleitung - wird der Forschungsbedarf für diese Thematik dargestellt. Der zweite Abschnitt - die Statusaufnahme - befasst sich mit dem Kostenmanagement. Hier werden die verschiedenen Projektphasen, die üblichen Kostenermittlungsverfahren, die Arten der Kostenermittlung wie auch die Toleranzen der jeweiligen Projektphasen eingehend behandelt. Im dritten Abschnitt - der Evaluierung relevanter Unterlagen - werden die verschiedenen Grundlagen definiert und (nach Projektphasen) strukturiert dargestellt. Im vierten Abschnitt - Auswertung der im dritten Abschnitt definierten Unterlagen - werden die verschiedenen Grundlagen in Abhängigkeit der Projektphase, des Projekttyps und der Form der Kostenermittlung hinsichtlich Relevanz untersucht und dargestellt. Als Ergebnis dieses Abschnittes wird auf Basis von empirischen Erfahrungen ein Modell logisch-deduktiv entwickelt und ein vorläufiger Unterlagenkatalog erstellt. Im fünften Abschnitt - den Projektanalysen - wird dieser theoretisch erarbeitete Ansatz mit Hilfe der Auswertung von Realprojekten und deren Problempotentialen mittels der gemischt denklogisch-deduktiven und empirisch-induktiven Methode verifiziert. Im sechsten Abschnitt - dem Standardunterlagenkatalog - werden die im theoretischen Ansatz definierten Unterlagen der Kostenermittlung (siehe Abschnitt 4) auf Basis der Ergebnisse der Projektanalysen (siehe Abschnitt 5) adaptiert.Diese zusammengeführte Unterlage stellt das Ergebnis dieser Dissertation - den Standardunterlagenkatalog - dar. Dieser ist als Grundlage für Kostenermittlungen im Hochbau während der Planungsphase vorgesehen.In his daily work experience the author has constantly met with the question, which basic documents would be essential for the cost estimate in building construction projects. This rather complex question and further more the specific line-up, referring to the numerous parties involved and the discipline of cost management in a reactive process, in which the documents have to be defined adequately at the planning costing interface, have given cause for engaging oneself comprehensively and intensively with the topic. The given doctoral dissertation evaluates the most essential influencing factors concerning cost estimates for building construction projects in the planning process and defines them on a second level. In the end, the paper establishes a standard data checklist (catalogue) to be used in the compilation of cost estimates in the planning process of building construction projects.The first chapter presents the need of further research in the field.In the second step - the status quo - the aim is to describe the cost management as a discipline. The different project phases, the methods of cost estimating, the types of cost estimates as well as the tolerance regarding their results in relation to the project phase are about to be decently discussed to give an overview of the field. The third part - the evaluation of relevant/essential/crucial documents - defines the various influencing factors and classifies them by project phase. At the fourth stage - the evaluation of the defined documents - the different documents are analysed depending on the project phase, the project type and the type of cost estimate by their level of relevance and influence.As a sub-target a logic-deductive model is developed using empirical data, whereby a first data checklist (catalogue) is defined. This theoretical approach is to be verified in the fifth chapter - the project analyses - using a mixed logical-deductive and empirical-inductive method based on the analysis of realised projects and their potential problems.These results are used in the next (sixth) step - the standard data checklist (catalogue) - to modify and amend the theoretically defined factors (see step four). This document represents the result of this paper - the standard data checklist (catalogue), which is meant to be used for cost estimates in the planning process of building construction projects
Generative Neural Articulated Radiance Fields
No full textUnsupervised learning of 3D-aware generative adversarial networks (GANs) using only collections of single-view 2D photographs has very recently made much progress. These 3D GANs, however, have not been demonstrated for human bodies and the generated radiance fields of existing frameworks are not directly editable, limiting their applicability in downstream tasks. We propose a solution to these challenges by developing a 3D GAN framework that learns to generate radiance fields of human bodies or faces in a canonical pose and warp them using an explicit deformation field into a desired body pose or facial expression. Using our framework, we demonstrate the first high-quality radiance field generation results for human bodies. Moreover, we show that our deformation-aware training procedure significantly improves the quality of generated bodies or faces when editing their poses or facial expressions compared to a 3D GAN that is not trained with explicit deformations.Computer Graphics and Visualisatio
Grammar [IO Islamic 1069] مَمْزُوج
No full textGrammar.
This manuscript is now IO Islamic 1069 in the India Office collections.
[metadata: Otto Loth, A Catalogue of the Arabic Manuscripts in the Library of the India Office, (volume 1), no. 989 here with further notations and hyperlinks].
989.
1069. Size 81/2 in. by 5 in.; foll. 34. Twenty-three lines in a page.
A Commentary (ممزوج ) on Abu’l-Ḳâsim Maḥmûd b. ‘Omar Zamakhsharî’s (d. A.H. 538) رسالة التصرفات , or treatise on Particles and the Inflection of Nouns , by MUḤAMMAD ‘IṢMAT ALLAH b. Maḥmûd Ni’mat Allah BUKHÂRÎ, who wrote it A.H. 945.
As the author states himself, the treatise commented on is only a portion of Zamakhsharî’s المقدّمة , i.e. مقدّمة الادب ; and it comprises Parts ( قسم ) III. and IV. of this work. See regarding the latter, Ḥ. Kh. vi. 76; Cat. Bodl. ii. 186; Fleischer, Cat. Lips 332; etc. The first three parts of it have been edited by Dr. Wetzstein (Samachscharii Lexicon Arabicum Persicum, etc., Lips 1850, autographed).
The preface begins:
حمدا لمن فتح ابواب العلوم على اولى الالباب الخ
and the author concludes as follows:
تم ما قصدت جمعه فى هذا الكتاب .... رحم الله لمن دعا لمؤلّفه الفقير الراجى الی رحمة الله البارى محمد عصمة الله محمود ابن 1 نعمة الله البخارى اسكنهما الله جوار رحمته و البسهما لباس مغفرته انه قدير باجابة دعاء الفقير فى وقت الظهر من يوم الاحد العاشر للصفر سنة خمس و اربعين و تسعمائة من الهجرة الخ
This MS. appears to have been transcribed from the author's own copy. It is neatly written in Nasta’lîḳ, and has corrections and notes by the author on the margin; the latter conclude invariably with منه عفى عنه , only the first note has منه مدّ ظلّه instead.
Two prayers are added on the title-page by the original hand. Worm-eaten.
[Gaikwar.]
1 Read بن محمود . Cf. Ḥ. Kh. v. 11
Evidence of dipstick superiority over urine microscopy analysis for detection of hematuria
No full textInternational audienceBackgroundThere is an unresolved debate on the best screening method for hematuria as a symptom of glomerulonephritis or urological malignancies. The urinary dipstick is generally considered as an imperfect surrogate for urine microscopy analysis.ResultsWe designed a study to compare urine microscopy analysis, urinary dipstick and flow cytometry, using controlled dilutions of blood in urine samples from volunteers collected in two different physiologically-relevant conditions (basal state and hyperhydration). We found that although all techniques were 100 % effective in detecting hematuria at basal state, these results were variably reproduced when testing the same final amount of hematuria in urine collected after hyperhydration. Our data shows a variable sensitivity for the detection of hematuria by urine microscopy analysis or flow cytometry, but not by urinary dipstick.ConclusionsUrinary dipstick qualifies as a better screening test for hematuria than urine microscopy analysis or flow cytometry, as it is sensitive and performs better in unstandardized conditions. It is universally available and also faster and cheaper than cytometric techniques
Evaluation of the ability of bone marrow derived cells to engraft the kidney and promote renal tubular regeneration in mice following exposure to cisplatin
No full textIt has been suggested that bone marrow derived stem cells have the ability to engraft the kidney and improve the outcome of severe acute kidney injury (AKI) in mice exposed to high doses of cisplatin, providing hope for cancer patients in whom irreversible renal damage occasionally occurs following the use of this highly effective anti-tumor drug. We tested the therapeutic potential of bone marrow derived cells injected during the acute phase (day 3 after cisplatin administration) of experimentally-induced AKI in C57Bl6/J mice, characterized by massive tubular necrosis, apoptosis, and a low proliferation capacity. We failed to show any benefit of bone marrow derived cells versus a regular homogenate of intact renal cells, or normal saline. Using cell tracers and flow cytometry, we demonstrated that bone marrow derived cells did indeed home to the bone marrow of the recipients but failed to settle in the kidney. Conversely, renal cells homed to injured kidneys. However, neither cell therapy protected the animals against cisplatin-induced death. We therefore question the short-term efficacy of bone marrow derived cells used to repair established injuries of the tubular epithelium
