Hinge Research Papers - Academia.edu (original) (raw)

The boxplot method (Exploratory Data Analysis, Addison-Wesley, Reading, MA, 1977) is a graphically-based method of identifying outliers which is appealing not only in its simplicity but also because it does not use the extreme potential outliers in computing a measure of dispersion. The inner and outer fences are deÿned in terms of the hinges (or fourths), and therefore are not distorted by a few extreme values. Such distortion could lead to failing to detect some outliers, a problem known as "masking".

- by Robiah Adnan
- •
- Econometrics, Statistics, Data Analysis, Monte Carlo Simulation

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... more

- by H. Masud Taj
- •
- Photography, Racism, Framing, Frames

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.

- by ANGGADA Jurnal Desain dan Seni
- •
- Desain Produk, Room, Hinge

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.

- by IJSRD Journal
- •
- Pushover Analysis, Performance Point, Hinge

Papuan white snake (Micropechis ikaheka) is endemic to New Guinea (the region of the Papua and Papua New Guinea). Internal histology of skin layer and the microtopography structure on the surface scales of M. ikaheka were the aims of the study. This study also related to zoogeographical of the snake in Papua. Geographical skin color variation of M. ikaheka can be described in three groups, i.e. brown, yellow and black group. The three groups of the snake have specific zoogeography in the mainland of Papua and satellite islands to Papua New Guinea. Paraffin method used in this work showed approximately five layers i.e. oberhautchen, the beta (β β β β β)-layer, the mesos layer, the alpha (α α α α α)-layer, and the dermis in the snake skin. Although the paraffin method cannot explain the arrangement of pigment cells, however, the dark color on the dermis might contain melanophores that might cause dark color of the snake body. Overlapping scales formed the hinge region were flexible to assist the snakes when they moved across substrate. Scanning electron microscopy (SEM) of the oberhautchen of all of M. ikaheka revealed no microornamentation. However, dorsal and ventral scales showed many follicles on the entire surface of the boundary scales.

- by Achmad Farajallah
- •
- Hinge

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.

- by Caroline Bem
- •
- Feminist Theory, Masochism, Jacques Derrida, Third space (Humanities)

Application of "advanced analysis" methods suitable for non-linear analysis and design of steel frame structures permits direct and accurate determination of ultimate system strengths, without resort to simplified elastic methods of analysis and semi-empirical specification equations. However, the application of advanced analysis methods has previously been restricted to steel frames comprising only compact sections that are not influenced by the effects of local buckling. A refined plastic hinge method suitable for practical advanced analysis of steel frame structures comprising non-compact sections is presented in a companion paper. The method implicitly accounts for the effects of gradual cross-sectional yielding, longitudinal spread of plasticity, initial geometric imperfections, residual stresses, and local buckling. The accuracy and precision of the method for the analysis of steel frames comprising non-compact sections is established in this paper by comparison with a comprehensive range of analytical benchmark frame solutions. The refined plastic hinge method is shown to be more accurate and precise than the conventional individual member design methods based on elastic analysis and specification equations.

- by mythily mahendran
- •
- Civil Engineering, Structural Engineering, Analysis, Structures
- by Antonius Rohlmann
- •
- Biomechanics, Orthopedics, Deformation, Clinical Sciences

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...

- by Hamed Roohbakhsh
- •
- Civil Engineering, Materials Science, Structural Engineering, Plasticity

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.

- by Marco Balucani
- •
- Engineering, Mechanical Engineering, MEMS, Stress

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... more

- by N. Lobontiu
- •
- Engineering, Vibrations, Modal Analysis, Smart Materials

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 to a context-free language. Since LOGCFL is contained in AC 1 and NC 2 , the evaluation problem of acyclic Boolean conjunctive queries is highly parallelizable. We present a parallel database algorithm solving this problem with a logarithmic number of parallel join operations. The algorithm is generalized to computing the output of relevant classes of non-Boolean queries. We also show that the acyclic versions of the following well-known database and AI problems are all LOGCFL-complete: The Query Output Tuple problem for conjunctive queries, Conjunctive Query Containment, Clause Subsumption, and Constraint Satisfaction. The LOGCFL-completeness result is extended to the class of queries of bounded treewidth and to other relevant query classes which are more general than the acyclic queries.

- by Georg Gottlob
- •
- Mathematics, Computer Science, Parallel Algorithms, Relational Database

In this paper, a new adaptive deployable spatial scissor-hinge structural mechanism (SSM) is introduced, which can be converted by means of actuators between a multitude of arch-like, dome-like and double curved shapes, where it can be stabilized and carry loads. This novel SSM is a spatial extension of a planar SSM introduced recently that can achieve a wide range of planar geometries. Main differences of the proposed structural mechanism from current deployable structures are the new connection type of the primary units and the proposed modified spatial scissor-like element (MS-SLE). With the development of this new connection detail and the modified element, it becomes possible to change the geometry of the whole system without changing the dimensions of the struts or the span. After presenting some disadvantages of current deployable structures and outlining the main differences of the proposed spatial SSM with existing examples, the dimensional properties of the primary elements are introduced. Then, geometric principles and shape limitations of the whole structure are explained. Finally, structural analyses of a typical structure in two different geometric configurations are performed, in order to discuss stiffness limitations associated with the advantage of increased mobility.

- by Koray Korkmaz
- •
- Civil Engineering, Behavior, Kinetics, Finite element method

Crenulations are a succession of micron-sized elongated ridges and troughs with a general dorsoventral pseudo-labyrinthine pattern that are present on the hinge plate of most pectinoideans. The crenulations of opposing valves are complementary and interpenetrate in a hinge-like fashion. They are also imprinted in the dorsal mantle, although there is evidence that the mantle adheres only at the ridges, but not at the troughs. Those mantle areas that secrete the ridges contain cells that are richer in structures, indicating an active metabolism than those facing the troughs. Crenulations are formed because the dorsal mantle expands allometrically along the anteroposterior direction. The excess length is accommodated by creasing. Crenulations initiate at the anterior and posterior ends of the hinge plate as shallow spheruliths, which increase in height with time until the mantle on both sides detaches from the shell areas forming the neighbouring troughs. A contact differentiation of the mantle into actively and passively secreting bands follows. This genetic model explains the general pattern as well as the changes in the morphology of crenulations that occur during growth. Crenulations are secondary postlarval structures unrelated to the provinculum. Their presence in the earliest pectinoideans makes crenulations a plesiomorphic character of the group.

- by Carmen Regina González Salas
- •
- Physiology, Zoology, Microstructure, Morphogenesis

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

- by Francesco Scarcello
- •
- Relational Database, Algorithm, CSP, Parallel Algorithm
- by Sunil Gowda
- •
- Structural Engineering, Plastic Hinge, Hinge

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.

- by N. Lobontiu
- •
- Engineering, Mechanical Engineering, Computer Science, Design

The results of tests on two continuous composite beams combining a reinforced concrete (RC) beam with a layer of reinforced ultra-high performance fiber reinforced concrete (R-UHPFRC) are presented. The R-UHPFRC element acts both as a tensile membrane and a flexural element. The tests show the element's contribution to the member capacity by allowing the redistribution of the internal forces. The continuous beams are placed on two intermediate supports; the shear span-depth ratios and stirrup content are chosen to provoke two successive formations of local flexure-shear collapse mechanisms, forming a plastic hinge at each support. With the formation of the first support hinge, the stresses redistribute. As the applied actuator displacement increases, the member continues to resist the increasing force up to the formation of a second support hinge that causes the member to collapse. The member deflection and resistance at collapse were respectively 4.5 and 1.3 times greater than the corresponding values at the formation of the first hinge. The response demonstrates the redundancy in RC beams with additional R-UHPFRC reinforcement, which can be used for designing structures against progressive collapse.

- by Talayeh Noshiravani
- •
- Civil Engineering, Composite Materials and Structures, Redundancy, Shear

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 ...

- by Katsuhisa Tawada
- •
- Microtubules, Clinical Sciences, Kinesin, Rats

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.