Light and Shadow

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Playful Learning about Light and Shadow: A Learning Study Project in Early Childhood Education

Playful Learning about Light and Shadow: A Learning Study Project in Early Childhood Education

The process of identifying potential critical aspects included three steps. First, video-documented practical and oral activities treating light and shadow were conducted with young children (n = 7) as free practical tasks in which one or two children at a time explored light and shadows using a flashlight in a dark room, followed up by group discussions each including two or three children. The teachers were discussing the appearance of shadows with the children, trying to find out how they discerned the phenomenon. Some children talked about the need for light and for light to be obstructed by something by saying, for example, “I am too thick, so the light cannot shine through me… then it becomes a shadow of that, which will not go through me”. On one occa- sion, something called “light spirals” was used by one child to explain the direction of light and the appearance of the shadow. Some children did not express any ideas that could be related to the appearance of shadows at all or beyond the need for some kind of light source (e.g., the sun, a lamp, or a flashlight).
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Rendering of light shaft and shadow for indoor environments enhancing technique

Rendering of light shaft and shadow for indoor environments enhancing technique

This study has proposed three new techniques to generate soft volumetric shadow, soft light shaft, and integrate light shaft and shadow with respect to volumetric shadow for indoor environments. First technique depends on a new soft shadow algorithm to create soft volumetric shadow. This algorithm computes multiple point lights and multiple depth maps to generate imperfect multi-view soft shadows. Therefore, The new algorithm to create soft shadow plays an important role in generating soft volumetric shadow technique. The soft volumetric shadow generats can be used in interactive applications with high efficient and high frame rate. The new technique to create soft light shafts can be used in interactive applications. The enhancing technique for integrating these effects, the outcomes obtained from this study are prepared to become grounds for the much required industrial standard in computer graphics. This technique solves the problem of image and image-based shadow, also it is thought to have an attractive effect and influence on the realism and real-time performance.
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SHADOW MATTING AND COMPOSITING WITH MULTIPAL AND REFLECTED LIGHT SOURCES

SHADOW MATTING AND COMPOSITING WITH MULTIPAL AND REFLECTED LIGHT SOURCES

547 harder penumbra. Finally, we would like to extend the operating range of the shadow matting and compositing equations, and experiments suggest that at least some extensions are possible. For instance, assuming the source and target backgrounds are Lambertian and geometrically similar, we have been able to matte and composite plausible shadows cast by multiple light sources without taking separate images for each light source, as shown in Figure.

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Light in the empirical shadow: base lining the impact of academic patenting legislation in Norway

Light in the empirical shadow: base lining the impact of academic patenting legislation in Norway

This paper reports on results from a project to provide light in this empirical shadow. The project addresses the patenting of academic and other public sector researchers (hereafter the UIH Sector) 1 in two stages. The first stage of the project involves designing and executing an empirical approach to identify and analyze academic patenting in Norway. This approach links registry data covering all researchers in Norway with concurrent domestic patent data. This step allows us to identify and analyze the involvement of academic researchers in patenting. Furthermore it will lay the basis for a targeted survey to explore qualitative aspects of commercialization, including attitudes, motivations to patent, the role of support services, etc. Stage two of the project surveys researchers identified in stage one. The second stage serves both to provide qualitative interpretative information about academic patenting as well as to help verify (and revise) the accurateness of the identification exercise. The overall objective is that the identification and the complementary survey can then provide a baseline against which to monitor and analyze Norwegian developments in academic patenting.
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Soft shadow rendering based on real light source estimation in augmented reality

Soft shadow rendering based on real light source estimation in augmented reality

The most challenging task in developing Augmented Reality (AR) applications is to make virtual objects mixed harmoniously with the real scene. To achieve photorealistic AR environment, three key issues must be emphasized namely consistency of geometry, illumination and time. Shadow is an essential element to improve visual perception and realism. Without shadow, virtual objects will appear like it is floating and thus will make the environment look unrealistic. However, many shadow algorithms still have drawbacks such as producing sharp and hard-edged outlines, which make the shadow’s appearance unrealistic. Thus, this paper will focus on generating soft shadow in AR scene, rendered base on real light sources position. The reflective sphere is used to create environment map image that can estimate the light source from the real scene and generate the soft shadows.
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Volleys of Light and Shadow

Volleys of Light and Shadow

– Mute strings with left hand resulting in a mostly unpitched sound. The left hand pressure is relatively hard while the bow pressure is relatively light. When this notehead is used, register corresponds to vertical bow placement – higher notes are closer to the bridge, lower notes are over the fingerboard. Left hand placement should also be used to sharpen registral differences. Clef is insignificant.

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A light in the shadow: the use of Lucifer Yellow technique to demonstrate nectar reabsorption

A light in the shadow: the use of Lucifer Yellow technique to demonstrate nectar reabsorption

Unlike studies where LYCH was applied into the nectaries [11,12], we tried to keep the phenomenon of nectar reabsorption away from any surrounding interference, using the inert fluoresce[r]

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A light on the Shadow Bond approach, the development of RI’s new Commercial Banks PD model

A light on the Shadow Bond approach, the development of RI’s new Commercial Banks PD model

The second point for discussion is the forward looking performance of the Shadow-Bond approach itself. The S&P ratings used with this approach are backward looking in the sense that the ratings are assigned by S&P with the knowledge that banks in trouble will get government support. Since this assumption is doubtful for the future it might be interesting to think of approaches which are more forward looking. Also it might be questioned whether we fulfilled the objected of mimicking S&P’s rating model in the best possible way. We fulfilled this objective by gathering data of a lot of factors and performing a stepwise regression on this data. For a numbers of factors which were selected by this regression it may be questioned whether these factors are real explanatory variables or perhaps effects of other factors which were not selected. It may be good to perform a qualitative study at S&P’s rating model and verify the explanatory variables which are in the model developed in this thesis. This would make the model more forward looking. Now the parameters with the best historic performance are selected, although it is not given that these factors will also have the best performance in the future.
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Fighting the shadow with the light

Fighting the shadow with the light

The opinions of the respective ministers and monarchs, envoys and ambassadors do not show one, unequivocal stance concerning the suppression of the Jesuit Order, however. In 1768, during Clement XIII’s last years as pope, Carlos III wanted to proceed with a complete and total dissolution of the Order, on the advice of the Portuguese who even suggested taking military action to force the pope to end the Society. Others, like Manuel de Roda, Carlos III’s minister for Grace and Justice and himself former envoy to Rome between 1758-1765, suggested caution and prudence and wait for a new pontificate, free of a ‘Jesuit shadow’ that were Clement’s advisors. A second Portuguese suggestion was to arrange a council and pressure the cardinals to depose the zeloti at the court of Rome and dissolve the Order. The Spanish prime-minister Grimaldi simply suggested to wait for other Catholic nations, such as Austria and Venice, to expel their Jesuits. 137
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On the Application of Art Design in Tourist Attractions—A Case Study of Suzhou Museum

On the Application of Art Design in Tourist Attractions—A Case Study of Suzhou Museum

Light is used in the building’s interior space to create atmosphere. As time passes by, light makes the space flow. Through thin grilles light gets inside the space orderly, and light and shadow wander on the wall, floor, furniture and stairs over time, simultaneously highlighting the shape, texture, color of the space and the contour of display environment. It requires move of light and people to achieve flexible use of space. People wander in mottled space as if they were walking at winding corridor. Sunlight streams through the ceiling and reached the floor, forming light spots, which bring the space to life.
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The Effect of Light on the Shadow Reaction of the Sea Urchin, Diadema Setosum (LESKE)

The Effect of Light on the Shadow Reaction of the Sea Urchin, Diadema Setosum (LESKE)

Total intensity of light of different sizes, necessary to inhibit — and elicit + a response, when the preceding Ox or the inhibitory O2tightis kept constant as reference light u » d •[r]

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Waiting for the Sun

Waiting for the Sun

control observation of of eventually greater my that created this be could shadow of of observe in light of observe closely ochre, the changed elements pursuing in result color, course g[r]

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Spirals in protoplanetary disks from photon travel time

Spirals in protoplanetary disks from photon travel time

Spiral structures are a common feature in scattered-light images of protoplanetary disks, and of great interest as possible tracers of the presence of planets. However, other mechanisms have been put forward to explain them, including self-gravity, disk-envelope interactions, and dead zone boundaries. These mechanisms explain many spirals very well, but are unable to easily account for very loosely wound spirals and single spiral arms. We study the effect of light travel time on the shape of a shadow cast by a clump orbiting close (within ∼ 1 au) of the central star, where there can be significant orbital motion during the light travel time from the clump to the outer disk and then to the sky plane. This delay in light rays reaching the sky plane gives rise to a variety of spiral- and arc-shaped shadows, which we describe with a general fitting formula for a flared, inclined disk.
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Survey on Multiple Shadow Detection and Removal Techniques

Survey on Multiple Shadow Detection and Removal Techniques

HSI color model includes Hue, Saturation and Intensity which are occur due to lack of lights in shadow. Owing to less light, the intensity is proposed to decline and the hue is expected to change from the actual hue to a darker one. [9] To calculate the changes in all factors of HIS color model from shadow to unshaded area, find the subtraction of the mean value of all factors of shadowed area from the mean value of corresponding factor of unshaded area.

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Professional boundaries: crossing a line or entering the shadows?

Professional boundaries: crossing a line or entering the shadows?

Those individuals or agencies that see boundaries as lines - and therefore every crossing as a violation - are more likely to see the need for a highly prescribed code of conduct. Those that view boundaries as shifting areas of shadow, where flexibility can become transgression, will be more inclined to a set of guidance based on general principles that require interpretation in the light of the particular circumstances. Of course, these different paradigms can have serious consequences: a social worker who came from one agency where gift acceptance was the norm and part of the agency's therapeutic approach to mutual help, would be exceptionally vulnerable moving to an agency where gift acceptance was viewed as tantamount to grooming. Perhaps the existence of these sharply at-odds paradigms explains the wide differences noted in the scenarios about the action that different informants would take.
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Characterization of a Multimodal and  Multispectral Led Imager: Application to  Organic Polymer’s Microspheres  with Diameter Φ = 10 2 μm

Characterization of a Multimodal and Multispectral Led Imager: Application to Organic Polymer’s Microspheres with Diameter Φ = 10 2 μm

ison. Each wavelength chosen as a reference defines a focal plan. In each set of the thirteen images acquired af- ter the choice of the reference, there’s only one image which is well contrasted. Indeed, this image is acquired with light source used to fix the focal plan. Then, we have thirteen contrasted images, each one corresponding to a reference wavelength. First, we compare these thirteen contrasted images to appreciate that presenting more reduced shadow. This comparison highlights that the reference wavelengths 590 nm, 625 nm, 660 nm and 700 nm are the ones whose corresponding images present more reduced shadow spreading on 7 pixels, 8,06 pixels, 7,07 pixels and 7 pixels respectively (Figure 2(a)). In second time, we determine the mean of the shadow size over the images from each set. The comparison shows in Figure 2(b) that the reference wavelengths 590 nm, 625 nm, 660 nm, 700 nm and 750 nm are the ones whose corresponding set of images present more reduced shadow spreading on 9.31 pixels, 9.67 pixels, 8.66 pixels, 8.01 pixels and 9.14 pixels respectively.
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Tārai Kōrero Toi : articulating a Māori design language : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Fine Arts at Massey University, Palmerston North, Aotearoa New Zealand

Tārai Kōrero Toi : articulating a Māori design language : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Fine Arts at Massey University, Palmerston North, Aotearoa New Zealand

In customary carving, fundamental elements for creating visual information were the tiki, manaia, tauira pattern, ata light and atakau shadow, the human and non-human spiritual form, and[r]

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SHADOW DETECTION AND REMOVAL IN COLOUR IMAGES USING MATLAB

SHADOW DETECTION AND REMOVAL IN COLOUR IMAGES USING MATLAB

Shadow detection and removal is an important task when dealing with colour outdoor images. Shadows are generated by a local and relative absence of light. Shadows are, first of all, a local decrease in the amount of light that reaches a surface. Secondly, they are a local change in the amount of light rejected by a surface toward the observer. Most shadow detection and segmentation methods are based on image analysis. However, some factors will affect the detection result due to the complexity of the circumstances, like water and a low intensity roof because of the special material as they are easy mistaken as shadows. In this paper we present a hypothesis test to detect shadows from the images and then energy function concept is used to remove the shadow from the image.
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Leadership in the shadow of '9/11'

Leadership in the shadow of '9/11'

In early January I received the following email from Christopher Land: “I was recently re-reading the paper on “Leadership: An Alienating Social Myth?” that you wrote with Judith Oakley and I couldn’t help but be reminded of the volume of press coverage that has been devoted to leadership in recent months (Gemmill and Oakley, 1992). A recent news feature: from a narrow, contested election victory in the US, George Bush has apparently risen admirably to the challenge of ‘world leader’. In the UK, Tony Blair has taken on the mission of becoming the free-West’s emissary to the rest of the world, thereby demonstrating his leadership abilities. Both of these events have tended to be reported, in the UK at least, in an unconditionally positive light. Of course not a day goes by when we are not reminded of the insidious, and strangely elusive, charismatic leadership of Osama Bin Laden. The point of this email is to see whether you would be interested in reflecting upon these post 9/11 developments in light of your thesis on leadership put forward in the 1992 paper?” This is the context from which I reflect here on the relevance of the early thesis to the leadership issues surrounding 9/11 (the September 11 th terrorist attack on America) and its aftermath. As I hope to show the thesis seems alive and well in the wake of the 9/11 disaster.
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Real-time shadow casting using fake soft shadow volume

Real-time shadow casting using fake soft shadow volume

Once shadow volumes have been rendered for all objects that could potentially cast shadows into the visible region of the scene, it will later cause all the areas that are in shadow volume to have a non-zero stencil value while all those areas in the light area remain zero. Lighting pass are performed to illuminates surfaces wherever the stencil value remain zeroes, re-enable writes to the color buffer, change the depth test to pass only when fragment depth values are equals or less to those in the depth buffer and configure the stencil test to pass when the value in stencil buffer is not equal to zero. Then, draw the blended onto the screen that will cast the hard shadow. The technique is known as depth-pass technique since it manipulates the stencil values only when depth test passes. The following is the general overview of the algorithm;
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