scholarly journals Low-Illumination Level UTC Photodetectors for QIS Applications

2021 ◽  
Author(s):  
Mathew Konkol
Keyword(s):  
Illumination Level ◽  
Low Illumination

scholarly journals Visual Perception during Mirror-Gazing at One’s Own Face in Patients with Depression

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Giovanni B. Caputo ◽  
Marco Bortolomasi ◽  
Roberta Ferrucci ◽  
Mario Giacopuzzi ◽  
Alberto Priori ◽  
...  
Keyword(s):  
Visual Perception ◽  
Facial Expression ◽  
Facial Recognition ◽  
Face Image ◽  
Illumination Level ◽  
Healthy Controls ◽  
Self Evaluation ◽  
Low Illumination ◽  
Mirror Gazing ◽  
The Relationship

In normal observers, gazing at one’s own face in the mirror for a few minutes, at a low illumination level, produces the apparition of strange faces. Observers see distortions of their own faces, but they often see hallucinations like monsters, archetypical faces, faces of relatives and deceased, and animals. In this research, patients with depression were compared to healthy controls with respect to strange-face apparitions. The experiment was a 7-minute mirror-gazing test (MGT) under low illumination. When the MGT ended, the experimenter assessed patients and controls with a specifically designed questionnaire and interviewed them, asking them to describe strange-face apparitions. Apparitions of strange faces in the mirror were very reduced in depression patients compared to healthy controls. Depression patients compared to healthy controls showed shorter duration of apparitions; minor number of strange faces; lower self-evaluation rating of apparition strength; lower self-evaluation rating of provoked emotion. These decreases in depression may be produced by deficits of facial expression and facial recognition of emotions, which are involved in the relationship between the patient (or the patient’s ego) and his face image (or the patient’s bodily self) that is reflected in the mirror.

An Evaluative Study of Three Photographic Focusing Screens under Two Levels of Illumination

1980 ◽  
Vol 9 (1) ◽  
pp. 37-44
Author(s):  
John B. Bunch
Keyword(s):  
Light Level ◽  
Illumination Level ◽  
Low Light ◽  
Evaluative Study ◽  
Light Levels ◽  
High Illumination ◽  
Significant Difference ◽  
Low Illumination ◽  
Post Hoc

The purpose of this experiment was to evaluate the ability of photography students to focus a camera accurately under two levels of illumination (high/low) with three types of focusing screens (plain groundglass, split-image and microprism). The participants were required to focus each screen three times under each light level; scores were focus errors in feet. A 2 × 3 MANOVA design was used, and post hoc comparisons were made for plain vs. split-image, plain vs. microprism, and plain vs. microprism and split-image combined. There was significantly less focus error (p < .05) under the low illumination level, but no significant difference between screen types across both light levels. The screen type X light level interaction was much higher than the p .05 required in this study. Plain groundglass produced the least overall error; microprism yielded the least error under low illumination and the highest error under high illumination; and split-image was the most accurate under high illumination and the least accurate for the low light level condition.

The Rod-and-Frame Test: Further Comments on Methodology

1973 ◽  
Vol 36 (2) ◽  
pp. 624-626 ◽  
Author(s):  
Gerald M. Long
Keyword(s):  
Test Performance ◽  
Illumination Level ◽  
Constant E ◽  
Low Illumination ◽  
Rod And Frame Test ◽  
Rod And Frame ◽  
Room Lighting

Two variables significantly affected Rod-and-frame Test performance. Low illumination level gave significantly larger RFT scores than “normal” room lighting. S-paced RFT trials during which the rate of rod rotation was determined by S‘s rate of responding yielded lower RFT scores than constant E-paced trials. Possible interpretations of data were briefly discussed as well as important implications for numerous investigations that have compared distributions of RFT scores across studies.

scholarly journals Образование макропор в n-Si при анодировании в органическом электролите

2018 ◽  
Vol 52 (3) ◽  
pp. 414
Author(s):  
Е.В. Астрова ◽  
Н.Е. Преображенский ◽  
Г.В. Ли ◽  
С.И. Павлов
Keyword(s):  
Fractal Structure ◽  
Etching Rate ◽  
Threshold Value ◽  
Illumination Level ◽  
Organic Electrolyte ◽  
Photoelectrochemical Etching ◽  
Rapid Transition ◽  
Vertical Walls ◽  
Effective Valence ◽  
Low Illumination

AbstractThe photoelectrochemical etching of solar-grade n -type silicon in a 4% solution of HF in dimethylformamide is experimentally studied. The pore morphology, porosity, effective valence, and etching rate are examined in relation to the applied voltage, illumination intensity of the sample’s backside, and process duration. It is found that the anodization of n -Si in an organic electrolyte substantially differs from that in aqueous solutions. This is manifested in that, at a voltage exceeding the threshold value, in the so-called breakdown mode, macropores with vertical walls begin to multiply and branch intensively due to the appearance of side pores. The appearance of secondary pores is accompanied by an increase in porosity, a decrease in the propagation velocity of the porous front deeper into the substrate, and rapid transition to the electropolishing mode. In the breakdown mode at a low illumination level, a fractal structure of macropores propagating along certain crystallographic directions is observed: 〈100〉 and along the previously unobserved 〈111〉. It is demonstrated that the morphology of macropores can be controlled in the course of anodization by passing from one mode to another upon changing the external parameters: voltage or illumination. It is shown that using an organic electrolyte makes it possible to obtain macroporous membranes with a porosity substantially exceeding that of macroporous membranes formed in aqueous electrolytes under the same conditions.

scholarly journals ON POLYMORPHIC LOGICAL GATES IN SUBEXCITABLE CHEMICAL MEDIUM

2011 ◽  
Vol 21 (07) ◽  
pp. 1977-1986 ◽  
Author(s):  
ANDREW ADAMATZKY ◽  
BEN DE LACY COSTELLO ◽  
LARRY BULL
Keyword(s):  
Traveling Wave ◽  
Illumination Level ◽  
New Wave ◽  
High Illumination ◽  
Low Illumination ◽  
Time Periods ◽  
Nor Gate ◽  
Oregonator Model ◽  
The Right ◽  
Universal Gate

In a subexcitable light-sensitive Belousov–Zhabotinsky (BZ) chemical medium an asymmetric disturbance causes the formation of localized traveling wave-fragments. Under the right conditions these wave-fragments can conserve their shape and velocity vectors for extended time periods. The size and life span of a fragment depend on the illumination level of the medium. When two or more wave-fragments collide they annihilate or merge into a new wave-fragment. In computer simulations based on the Oregonator model, we demonstrate that the outcomes of inter-fragment collisions can be controlled by varying the illumination level applied to the medium. We interpret these wave-fragments as values of Boolean variables and design collision-based polymorphic logical gates. The gate implements operation XNOR for low illumination, and it acts as NOR gate for high illumination. As a NOR gate is a universal gate, then we are able to demonstrate that a simulated light sensitive BZ medium exhibits computational universality.

A 64 × 64 CMOS Active Pixel Sensor Operative at a Very Low Illumination Level

2005 ◽  
Vol 12 (3) ◽  
pp. 196-201 ◽  
Author(s):  
Jae-Hyoun Park ◽  
Hoon Kim ◽  
Sang-Ho Seo ◽  
Jang-Kyoo Shin
Keyword(s):  
Illumination Level ◽  
Active Pixel Sensor ◽  
Active Pixel ◽  
Low Illumination

One Million Direct Magnification Microscopy

1971 ◽  
Vol 29 ◽  
pp. 166-167
Author(s):  
J. A. Hugo ◽  
V. A. Phillips
Keyword(s):  
Electron Microscopy ◽  
High Resolution Electron Microscopy ◽  
Illumination Level ◽  
Level Of Detail ◽  
Photographic Emulsion ◽  
Low Contrast ◽  
Fluorescent Screen ◽  
Resolution Electron ◽  
Lattice Images ◽  
Electron Microscopes

A continuing problem in high resolution electron microscopy is that the level of detail visible to the microscopist while he is taking a picture is inferior to that obtainable by the microscope, readily readable on a photographic emulsion and visible in an enlargement made from the plate. Line resolutions, of 2Å or better are now achievable with top of the line 100kv microscopes. Taking the resolution of the human eye as 0.2mm, this indicates a need for a direct viewing magnification of at least one million. However, 0.2mm refers to optimum viewing conditions in daylight or the equivalent, and certainly does not apply to a (colored) image of low contrast and illumination level viewed on a fluorescent screen through a glass window by the dark-adapted eye. Experience indicates that an additional factor of 5 to 10 magnification is needed in order to view lattice images with line spacings of 2 to 4Å. Fortunately this is provided by the normal viewing telescope supplied with most electron microscopes.

THE EFFECTS OF INTERNAL PARTITION ON INDOOR DAYLIGHTING PERFORMANCE OF STUDENT RESIDENTIAL BUILDING IN IPOH, PERAK

2020 ◽  
Vol 7 (2) ◽  
pp. 1
Author(s):  
Khairul Azmi Mohamed ◽  
Asmat Ismail ◽  
Nur Azfahani Ahmad
Keyword(s):  
Residential Building ◽  
Illumination Level ◽  
Internal Partition ◽  
The Tropics

The installation of an internal partition has resulted in lowering the illumination level inside a building. Therefore, this study is intended to evaluate the effects of several internal partition layout on indoor daylighting performance in student residential rooms. Several options of internal partition were simulated using Climate Based Daylight Modelling (CBDM) to suggest the effective partition layout to overcome low daylighting level inside the room at the annual level. The findings indicate that the internal partition perpendicular to the window layout has been proven to have the highest annual daylight sufficiency in a student residential room in the tropics.

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