Hinge

The women’s face is a black circle against a white square. She threatens to engulf the background until all the white that remains will be in the corner of her eyes when she opens them, and in the white of her teeth when she chooses to speak. The spatial dominance is an illusion, outcome of telephoto-ens and an upward tilt of the camera. The act of photographing is in the photograph. Technology adopting a posture of submission for the split-second it took the machine to blink. Nevertheless, however much the white space is reclaimed by the black face, there remains a white area forever out-of-bound.

Review of Photo-exhibit:
Brian Lanker I DREAM A WORLD: Portraits of Black Women Who Changed America.

Piramal Art Gallery February 24-March7, 1993; organized by The Centre for Photography as an Art Form, NCPA & USIS, Bombay

Partition is one of the elements that divides the room into several parts. Many also refer to partitions as "dividers" or "screens". In places such as multipurpose rooms, museums, exhibition halls and events, which usually contain temporarily scheduled events in the room, partitions are often used for various needs either as room dividers, booths or as walls for art works such as paintings. From these activities, selecting the appropriate partition type is very important to support the ease of installation or function of the partition itself. The author tries to explore the design of the partition panel with the incorporation of a hinge system to produce movement and connections that have many uses so that the application of the partition panels can support all the needs of the room and the events held. Apart from the usability point of view, the author also explores the material aspects that will be designed on the panel so that it is lighter than most partitions. With a light weight it will also facilitate the process of dismantling the partition panels.

Many reinforced concrete structures were severely damaged in past earthquakes have indicated the need for retrofit. This seismic rehabilitation of older concrete structures in high seismicity areas is a matter of growing concern. Simplified linear-elastic methods are not adequate to assess such seismic deficient buildings. Thus here we carried out the project using Pushover analysis a non-linear elastic method which helps to assess the seismic deficiency or damage vulnerability of buildings. Earthquakes cause the loss in terms of life and property of any region so they are the most devastating natural hazards. size, shape and geometry of that structure i.e, vertical and horizontal irregularities and path of load transferring to the supporting ground will affect the behaviour of the structure. Irregularity in building attracts forces which lead to stress concentration at the point of irregularity and leads to collapse or localized failure of that structure. The present study focuses on seismic performance of irregular RC models having irregularities i.e. vertical geometric irregularity. ETABS a finite element software has been used to analyse the structure. Here 3-D RC models are modeled and analyzed for seismic zones IV and V. Roof displacement; Performance point; Base shear carried; Number of Hinges formed are the parameters used to quantify the performance of the structure.

The term “diptych” designates visual artworks in two halves that are simultaneously united and separated by a hinging mechanism. This article explores the form’s adoption by narrative film through the double case study of Grindhouse (Quentin Tarantino and Robert Rodríguez, 2007) and Tarantino’s Death Proof, one of Grindhouse’s constituent halves. Considering the diptych’s relevance both to the history of film exhibition and to the logics of revenge and masochism, I argue, first, that the diptych stages especially fruitful encounters between material and narrative concerns and, second, that as a narrative form, the diptych is particularly apt at making ethical paradox accessible.

Chloride-induced corrosion is one of the most important causes of the strength degradation of reinforced concrete (RC) bridges. As the piers of RC bridges are important elements for sustaining lateral loads, corrosion of pier columns may lead to significant degradation of the structure. It is thus necessary to have an appropriate evaluation technique to assess the effect of corrosion on the behaviour of RC columns. Numerical modelling approaches based on a concentrated plastic hinge can predict structural behaviour rapidly and with acceptable accuracy, and are highly regarded by engineers. In this study, a numerical approach was conducted to develop an empirical lumped plasticity model (LPM) for corroded RC column elements. In this study, 13 440 RC column specimens, including corroded and uncorroded columns of both rectangular and circular cross-section, were analysed under monotonic and cyclic loading. The LPM was extracted based on regression of the results of cyclic and monotonic...

This paper presents a new concept flexure hinge for MEMS applications and reveals how to design, construct, and experimentally test. This hinge combines a curved beam, as a flexible element, and a pair of conjugate surfaces, whose contact depends on load conditions. The geometry is conceived in such a way that minimum stress conditions are maintained within the flexible beam. A comparison of the new design with the other kind of revolute and flexible joints is presented. Then, the static behavior of the hinge is analyzed by means of a theoretical approach, based on continuum mechanics, and the results are compared to those obtained by means of finite element analysis (FEA) simulation. A silicon hinge prototype is also presented and the construction process, based on single step lithography and reactive ion etching (RIE) technology, is discussed. Finally, a crucial in–SEM experiment is performed and the experimental results are interpreted through the theoretical models.

Page 1. Torsional stiffness of several variable rectangular cross-section flexure hinges for macro-scale and MEMS applications This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2004 Smart Mater. Struct. 13 12 ...

This paper deals with the evaluation of acyclic Boolean conjunctive queries in relational databases. By well-known results of Yannakakis (1981), this problem is solvable in polynomial time; its precise complexity, however, has not been pinpointed so far. We show that the problem of evaluating acyclic Boolean conjunctive queries is complete for LOGCFL, the class of decision problems that are logspace-reducible

The paper introduces the circular cross-section corner-filleted flexure hinges as connectors in three-dimensional compliant mechanism applications. Compliance factors are derived analytically for bending, axial loading and torsion. A circular cross-section corner-filleted flexure hinge belongs to a domain delimited by the cylinder (no fillet) and the right circular cross-section flexure hinge (maximum fillet radius). The analytical model predictions are confirmed by finite element simulation and experimental measurements. The circular cross-section corner-filleted flexure hinges are characterized in terms of their compliance, precision of rotation and stress levels.

Conventional kinesin (Kinesin-1) is a microtubule-based molecular motor that supports intracellular vesicle/organelle transport in various eukaryotic cells. To arrange kinesin motors similarly to myosin motors on thick filaments in muscles, the motor domain of rat conventional kinesin (amino acid residues 1-430) fused to the C-terminal 829 amino acid residues of catchin (KHC430Cat) was bacterially expressed and attached to catchin filaments that can attach to and arrange myosin molecules in a bipolar manner on their surface. Unlike the case of myosin where actin filaments move toward the center much faster than in the opposite direction along the catchin filaments, microtubules moved at the same speed in both directions. In addition, many microtubules moved across the filaments at the same speed with various angles between the axes of the microtubule and catchin filament. Kinesin/catchin chimera proteins with a shorter kinesin neck domain were also prepared. Those without the whole ...

A multi-span, curved, concrete box-girder bridge has been extensively instrumented by the California Strong Motion Instrumentation Program (CSMIP) in cooperation with the California Department of Transportation (Caltrans). On 28 June 1992, the bridge was shaken by the magnitude 7–5 Landers and magnitude 6–6 Big Bear earthquakes in southern California. The epicentres of these earthquakes were 50 and 29 miles (81 and 46 km) from the bridge, respectively. All 34 strong-motion sensors installed on the bridge recorded the response to these earthquakes and provided an insightful set of data. A striking aspect of the response is the presence of intermittent sharp spikes in nearly all of the acceleration records from sensors at the deck of the bridge. Among these the highest spike was 0.8g for the Landers and 1.0g for the Big Bear earthquake. The peak ground acceleration at the bridge site was only about 0.1g for both these earthquakes. With the aid of visual examination and simple analysis it is deduced that (1) the spikes were caused by forces generated at separation joints by impacts and stretching of the cable restrainers between adjacent bridge segments; (2) the forces of impacts and cable stretching are directly proportional to the size of the spikes and can be estimated by the use of a simple formula; and (3) the spikes travelled from their source to other locations on the bridge with the velocity of a compression wave propagating through concrete.