Transparent Stream Research Articles

Interpretation of the Seidel test for open eye injury: Experimental study

AIM: The study aimed to examine the phenomenon of fluorescence during the Seidel test on an experimental model of open eye injury (OEI). MATERIAL AND METHODS: The experimental study used cadaver pig eyes and was conducted in the Wetlab educational laboratory of the St. Petersburg branch of the S.N. Fedorov National Medical Research Center Interbranch Scientific and Technical Complex “Eye Microsurgery”. After creating a perforated hole, the cornea was stained with fluorescein and observed under a cobalt-blue slit-lamp light. After the test strips were removed, the experiment was timed. RESULTS: The fluorescence phenomenon was noted immediately after applying the stain to the ocular surface of cadaver eyes with OEI. Fluorescein was dissolved in the flowing intraocular fluid (IOF) and was restrained at the wound edges. Then, the color of the flowing IOF changed. In the experiment, two phases of the flowing IOF color were registered, that is, up to 2.95 s, a bright-green fluid flow was noted. After 2.95 s, the stain washed out, and the main stream of liquid was divided into several streams with varying degrees of staining intensity. At 4.12 s, a transparent stream of escaping liquid was noted in the center and green streams along the edges. CONCLUSION: The Seidel test consists of two successive phases, namely, the initial appearance of a “bright-green stream” of IOF flowing through the corneal wound, lasting no more than 3 s after the administration of fluorescein; and during phase 2, in the flow center, the fluid became transparent, and bright-green staining remained at the edges. The Seidel test should be performed in compliance with all conditions that ensure the manifestations of fluorescence, always using a cobalt slit-lamp filter, and the result should be evaluated considering the sequence of its phases.

Glacial stream ecosystems and epilithic algal communities under a warming climate

Climate change is accelerating the global loss of glaciers with potentially striking consequences for downstream ecosystems. However, there exists limited evidence of the ecological impacts of glacier loss in meltwater streams, particularly in those outside of North America and Europe. We provide a review of the abiotic conditions in glacial streams that are potential factors of their ecosystem function and biodiversity with an emphasis on their key primary producers, namely rock-attached algae or “epilithon”. Here, shrinking glaciers discharge over time less turbid melt waters, resulting in slower moving and more transparent stream conditions that are also warmer and more chemically dilute. We hypothesize that these environmental changes will stimulate epilithic algal growth while also shifting its community structure towards larger and less nutritious taxa. Although such an increase in algal growth may benefit the productive harvestable fish capacity of certain mountain streams, a potential negative trade-off involves the proliferation of nuisance algae (e.g., Didymosphenia geminata), which thrives under clear, nutrient-poor mountain conditions. We advocate the use of long-term ecological monitoring programs and experiments coordinated across global mountain ranges to better predict and understand the ecological consequences of loss of glaciers on mountain stream ecosystems.

Criteria for assessing the reliability of the predictions: II. CATALOGIC BOD and BCF base-line models

The OASIS CATALOGIC software is distinctive in that it requires the simulation of microbial metabolism for prediction of biodegradation and fish liver metabolism for prediction of bioaccumulation. The reliability of these structure-activity predictions typically involves invoking OECD principles and ECHA practical guidance. Questions remain, especially whether some predictions for chemicals belonging to less than 100% of applicability domain (AD) still may be considered as reliable and what’s the tolerated threshold for belonging to a model’s AD. Here the reliability of the predictions associated with biodegradation and bioaccumulation endpoints obtained from OASIS CATALOGIC models are examined to clarify criteria for assessing the reliability of the predictions. In the end, the reliability of any prediction is based in large part on: 1) establishing a transparent stream of relevant information, 2) providing and documenting relevant in silico and experimental data, and 3) demonstrating metabolic similarity between chemicals. Moreover, when the metabolic transformation is fundamental, it is critical to establishing the adequacy of the simulated transformations as this is indispensable evidence for establishing the reliability of a prediction.

Characteristics of Shock-Induced Dust Flux from the Surface of Lead and Copper Samples under Pressure in the Shock Wave of 45–50 GPa with Unloading into Vacuum

The results of experimental studies of the shock-induced particle ejection (“dusting”) from a free rough (Rz = 20) surface of lead and copper samples into an evacuated medium are presented. The experimental methods were based on different physical principles. To determine the size of particles by shadow laser-optical imaging more efficiently, a narrow strip was isolated in the center of the free surface of a sample from which an optically transparent stream of particles was ejected. The rest of the surface, substantially larger in size, ejected particles, parameters of which were reliably recorded using optical heterodyne interferometry detection, radiographic imaging, and piezoelectric techniques. This made it possible to obtain more reliable data on the particle size distribution, the velocity of the front of a particle flux, and the density (weight) distribution of the flow in the direction of its motion, necessary to refine the existing models and create more reliable models to describe the phenomenon. Using lead and copper samples, the material of which melts or does not melt under shock wave loading in selected close conditions (amplitude of the shock wave and roughness of the free surface), made it possible to clearly demonstrate the effect of melting on the qualitative pattern and quantitative characteristics of the shock-induced dusting process.

“Dealt with at his owne weapon”: Anti-Antiquarianism in Milton’s Prelacy Tracts

“Dealt with at his owne weapon”: Anti-Antiquarianism in Milton’s Prelacy Tracts David Weil Baker In his first published prose work, Of Reformation (1641), John Milton accuses “antiquarians,” along with “libertines” and “politicians,” of being the main “hinderers of reformation.”1 Whereas “politicians” support prelacy because of “reason of state” (573) or the “trimme paradox” of “no bishop, no king” (582) and “libertines” do so out of “licentiousness” (570), the hinderers to whom the first half of Of Reformation is largely addressed “over-affect Antiquity,” in particular the church fathers. In “thus calling for Antiquity, they fear the plain field of Scriptures,” preferring “muddy waters, where no plummet can reach the bottome” and “the dark, the bushie, the tangled forest” to the “transparent streams of divine Truth” (569). Milton, however, also distinguishes “antiquarians” from “antiquaries,” whose “labours are usefull and laudable” (541). By “antiquaries” he presumably means those scholars and collectors who were known for their use of documents, old coins, stone inscriptions and other fragmentary evidence to piece together the pasts of institutions, places, and peoples.2 Such scholarship was not averse [End Page 207] to legends and fables either, collecting them along with other historical remains; yet by the seventeenth century it was often associated with the discrediting of fictitious history, most notably, that of Geoffrey of Monmouth.3 As Milton himself asserts at the outset of his The History of Britain (published in 1671), “We find, that of British affairs, from the first peopling of the Hand to the coming of Julius Caesar, nothing certain ... hath hitherto bin left us. That which we have of oldest seeming, hath by the greater part of judicious Antiquaries bin long rejected for a modern fable.”4 Here, however, the doubtfulness (“nothing certain”) that seems to accompany the endeavors of antiquaries recalls the metaphors used to characterize antiquarians in Of Reformation, thus raising the question of how far apart Milton really viewed the two groups as being. [End Page 208] I want to argue that in Of Reformation as well as his other prelacy tracts Milton in fact quarrels not only with “antiquarians” but also with some “antiquaries” and that the broader issue of this quarrel is that of the ways in which—and in particular the texts by means of which—the past might best lend itself to the cause of religious reformation. In these early tracts, Milton’s sense of the history of the English Reformation is, as David Loewenstein has argued, one of “thwarted progress.”5 England was, as Of Reformation asserts, the first country to “set up a standard” for the “recovery of lost truth” and to blow the “Evangelick trumpet to the nations” (525). But it now lags behind those it inspired. Milton emphasizes that if England is to regain its primacy in the onward movement of reformation, it must seek the lost truth of an earlier and not yet corrupted Christianity in the one place in which it was to be found, i.e., its “evangelick,” or scriptural source. Thus, on the whole he has little patience for those who, by choosing to follow the streams of truth amidst a welter of confusing and conflicting evidence about the past, had the effect of demonstrating that these streams, whether divine or otherwise, rarely ran clear. With its predilection for a “tangled forest” or what Milton elsewhere terms the “labyrinth of controversial antiquity,”6 antiquarianism often figures in the prelacy tracts as an impediment to reformation. Indeed, Milton does not even maintain his initial distinction between “antiquary” and “antiquarian” throughout Of Reformation, where he later seems to slip when he notes that the “antiquary” must be “dealt with at his owne weapon,” that is, answered with other patristic citations, if he relies on the church fathers to justify prelacy (560). But patristic writings are not the only weapon that Milton turns against antiquarianism in the prelacy tracts, which also emphasize antiquarian credulity rather than its role in the debunking of the fables and legends out of which fictitious history is composed. In these tracts Milton even goes so far as to equate a certain kind of antiquarianism with an undiscriminating acceptance of all legacies, whether true...

Between Nature and Artifice: "Transparent Streams of New Liquid"

Previous articleNext article No AccessBetween Nature and Artifice: "Transparent Streams of New Liquid"Francesca Dell'Acqua BoyvadaoğluFrancesca Dell'Acqua Boyvadaoğlu Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by Res Volume 53-54Spring-Autumn 2008 Published in association with the Peabody Museum of Archaeology and Ethnology, Harvard University Article DOIhttps://doi.org/10.1086/RESvn1ms25608811 Views: 30Total views on this site Copyright The President and Fellows of Harvard CollegePDF download Crossref reports no articles citing this article.

Dynamic Microfluidic Photomasking

This paper presents a novel microfluidic photomasking strategy. Laminar microfluidic streaming is exploited to achieve photomasking with dynamic spatial control. Two light-absorbing streams hydrodynamically focus a transparent stream to define a line of light transmission. A device incorporating two such microfluidic layers, which are aligned orthogonally, enables light transmission only where the transparent streams overlap. Control of fluid flow in the microfluidic layers enables dynamic spatial control of the exposed region. The dynamic microfluidic photomasking strategy is tested through transmitted light microscopy and applied to microfabrication via photoresist patterning. When applied to microfabrication in a frontal photopolymerization mode, this method affords both planar and depthwise control of feature geometry.

Driving tiled displays with an extended chromium system based on stream cached multicast communication

When driving tiled displays using the Chromium’s Tilesort-SPU the performance bottlenecks are the client’s high utilization caused by expensive sorting and bucketing of geometry and the high bandwidth consumption caused by too many redundant unicast transmissions. We addressed these problems with an implementation of a true point-to-multipoint connection using UDP multicast. A transparent stream cache avoids redundant transmissions of command sequences that are generated by applications several times. In addition, frustum and hardware accelerated occlusion culling methods may be used to eliminate unnecessary transfer of invisible geometry. Finally, a software based method for synchronization of buffer swap operations at all servers was implemented. In a nutshell, for the first time an appropriate combination of our optimizations makes it possible to render large scenes synchronously on an arbitrary number of tiles at nearly constant performance.

Psychotherapy: releasing the dark, transparent stream.

Back to table of contents Next article ArticleNo AccessPsychotherapy: Releasing the Dark, Transparent StreamJudd MarmorJudd MarmorSearch for more papers by this authorPublished Online:1 Apr 2006https://doi.org/10.1176/ps.35.1.5AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InEmail "Psychotherapy: Releasing the Dark, Transparent Stream." Psychiatric Services, 35(1), p. 5 Access content To read the fulltext, please use one of the options below to sign in or purchase access. Institutional Login Sign in via OpenAthens Purchase Save for later Item saved, go to cart PPV Articles - Psychiatric Services $35.00 Add to cart PPV Articles - Psychiatric Services Checkout Please login/register if you wish to pair your device and check access availability. Not a subscriber? Subscribe Now / Learn More PsychiatryOnline subscription options offer access to the DSM-5 library, books, journals, CME, and patient resources. This all-in-one virtual library provides psychiatrists and mental health professionals with key resources for diagnosis, treatment, research, and professional development. Need more help? PsychiatryOnline Customer Service may be reached by emailing [email protected] or by calling 800-368-5777 (in the U.S.) or 703-907-7322 (outside the U.S.). FiguresReferencesCited byDetailsCited byNone Volume 35Issue 1 January 1984Pages 5-5 Metrics PDF download History Published online 1 April 2006 Published in print 1 January 1984