Distribution of Seismic Damage in Steel Buildings Component Equipped by Viscoelastic Dampers against Far-Field Earthquake

Damage to structures with the concept of inelastic behavior and consequently hysteresis energy is very close. Therefore, it can be said that hysteresis energy at these levels can be a significant criterion for designing or controlling the structure. In this research, the first three steel frames of 4, 8, and 12 floors with the medium bending frame system have been designed with the statically equivalent method according to valid international regulations; then, all frames have been subjected to nonlinear dynamic analysis by seven accelerometers. The purpose of this study is to investigate the distribution of damage, energy, relative displacement, roof displacement, and base shear in the studied frames. In the following, the necessity of using the retrofitting method to reduce the relative displacement is described based on the regulations. Then, viscoelastic dampers are used to strengthen and reduce damage in the studied frames in the face of distant field records. The obtained results indicate that despite the uniform distribution of resistance in the height of the floors, the hysteresis energy distribution and damage diagrams do not follow this distribution and other parameters such as hysteresis energy, which play a major role in structural members’ damage, should be included in the design process. In this research, viscoelastic dampers have been used for retrofitting. The results show that this type of damper shows good performance in reducing damage under earthquakes in the remote area.

Art in Corporate Governance: a Deweyan Perspective on Board Experience

Corporate governance sits at the intersection of many disciplines, among them law, business, management, finance, and accounting. The point of departure for large portions of this literature concerns the ugliness of greed, ambition, misdemeanors, and malfeasance of corporations, their directors, and those actors who hold shares in them. This essay takes a rather different starting point. Drawing upon insights from a distant field, it uses the discussion of aesthetics in Dewey’s treatise on art to ask what motivates directors to act in ways that constitute the attention and engagement that we associate with the effectiveness of boards. Using Dewey’s thinking about aesthetic experience, this paper examines the experience of organization boards, both in the literature and in the personal experience of the author. These observations point to need to reflect on motivation when considering both the practice of corporate governance and the policy frameworks in which it operates.

Zakat-Based Community Driven Development

This study investigates the cognition development in the phenomena of zakat-based community driven development (CDD) in Indonesia. Comparing with the previous and contemporary practice of zakat, this paper identifies that formation of institutional forces and distant field from social networks on actors contribute some influences in the cognition development in zakat practice, especially in zakat disbursement for empowering the beneficiaries of zakat (mustahiq). This study contributes not only to contemporary zakat practices by developing new model in zakat disbursement program, but also to neo-institutional studies on the cognition development of actors and conditions of change in the strategic action field from the experience on zakat practice in Indonesia.

Numerical Modeling on Fuel Cell Cooling using Water Based Aluminum Nitride Nanofluid

In the trendy research, CFD codes got developed and run with water-AlN nanofluid to predict the thermal concerns of fuel cell. The convective governing equalities of mass, force and drive are computed for predicting the thermal issues of fuel cell. The time step selected throughout the intact computation is 0.0001 s. The soundings affect CFD forecasts of temperature field, temperature contour plus fluid-solid boundary temperature of fuel cell. The fluid-solid boundary temperature of fuel cell is noticed as 320 K. This stands far less than the hazardous limit of 356 K temperature desired for the objective of beating thermal cataclysm of fuel cell. The temperature of water-AlN nanofluid stands peak contiguous to the fuel cell vicinity. Additionally, the temperature of water-AlN nanofluid gently drops with improvement in remoteness from fuel cell. Subsequently, this becomes surrounding temperature in the distant field zone. The corresponding tinted temperature contour stands accessible. In addition, the congruent plot of temperature against distance from fuel cell stays revealed. The development of CFD revelations stand together with the credentials of undertakings

Spatial variation in black-headed night monkey (Aotus nigriceps) vocalizations

Quantitative acoustic analysis has been used to decipher individual differences, population structure, and taxonomic diversity in numerous primate species. We previously described three distinct call types in wildAotus nigriceps, and now assess acoustic differences in two of these call types between social groups and spatially distinct populations. Acoustic parameters for both analyzed call types exhibited significant variability between groups. Similarly, geographically distant field sites were acoustically distinct from one another. Several groups also used a variation of a common call: a triplet Ch Ch instead of a duplicate. Other groups made use of ultrasonic frequencies which have not previously been reported inAotus. Our results suggest thatAotus nigricepsexhibits substantial acoustic variability across sites that could potentially be useful for taxonomic classification, although additional geographically distant populations still need to be sampled. The possibility of individual signatures also exists and will require recording vocalizations from known individuals.

Plant trichomes and a single gene GLABRA1 contribute to insect community composition on field-grown Arabidopsis thaliana

Background: Genetic variation in plants alters insect abundance and community structure in the field; however, little is known about the importance of a single gene among diverse plant genotypes. In this context, Arabidopsis trichomes provide an excellent system to discern the roles of natural variation and a key gene, GLABRA1, in shaping insect communities. In this study, we transplanted two independent glabrous mutants (gl1-1 and gl1-2) and 17 natural accessions of Arabidopsis thaliana to two localities in Switzerland and Japan.Results: Fifteen insect species inhabited plant accessions, with 10–30% broad-sense heritability of community indices being detected, such as species richness and diversity. The total abundance of leaf-chewing herbivores was negatively correlated with trichome density at both the field sites, while glucosinolates had variable effects on leaf chewers between the two sites. Interestingly, there was a parallel tendency for the abundance of leaf chewers to be higher on gl1-1 and gl1-2 than for their different parental accessions, Ler-1 and Col-0, respectively. Furthermore, the loss of function in the GLABRA1 gene significantly decreased the resistance of plants to the two predominant chewers, flea beetles and turnip sawflies.Conclusions: Overall, our results indicate that insect community composition on A. thaliana is heritable across two distant field sites, with GLABRA1 playing a key role in altering the abundance of leaf-chewing herbivores. Given that such a trichome variation is widely observed in Brassicaceae plants, the present study exemplifies the community-wide impact of a single plant gene on crucifer-feeding insects in the field.

AN EXPIENCE OF THE LITTLE AUK SEXING (ALLE ALLE LINK) BY THE BEAK OUTLINES

The method of the distant field sexing of the monomorphic birds by the photographs developed initially for the White-winged Tern (Chlidonias leucopterus), turned out to be effective for the monomorphic little auks (Alle alle). Outlines of head and beak of average male and female have been prepared with an aid of Photoshop SC2 from the multiple individual outlines, based on a number of photographs of the birds of know sex (copulating birds), taken from the Internet. Males statistically significant differ from females by the heights of maxilla and mandible at the border of feathers and in the middle of the beak. However, heights cannot be treated as diagnostic due to the extensive zones of overlapping. The truly diagnostic criteria are the ratios (indexes) of the height to each other as well as the values of the discriminant functions of the mentioned ratios. Acquired thus outlines and ratios have been applied to the 49 individuals of the little auks on the photographs. Their sex was known to the examining party, but not to the author. The maximal match of the outlines to the specimen on the photograph showed its possible sex. The subsequent check of the data showed 100% correct sexing. Similar level of the correct sexing has been reached by using the discriminant equations, based both on a number of measurements of the beak (significantly different in the opposite sexes) and the ratios between these measurements, showing the degree of their robustness and expression of certain characters of the beak (gonys, nail, culmen, etc.). The mentioned method is useful not only for the monomorphic species of all the ages and in various seasons, but also for the dimorphic species in the periods, when distant sexing is difficult (non-breeding, juvenile and nestling plumage). About 570 species, studied so far, proved the sensitivity of the sexing method.

Single camera-based synchronisation within a concept of robotic assembly in motion

Purpose – Automated robotic assembly on a moving workpiece, referred to as assembly in motion, demands that an assembly robot is synchronised in all degrees of freedom to the moving workpiece, on which assembly parts are installed. Currently, this requirement cannot be met due to the lack of robust estimation of 3D positions and the trajectory of the moving workpiece. The purpose of this paper is to develop a camera system that measures the 3D trajectory of the moving workpiece for robotic assembly in motion. Design/methodology/approach – For the trajectory estimation, an assembly robot-guided, monocular camera system is developed. The motion trajectory of a workpiece is estimated, as the trajectory is considered as a linear combination of trajectory bases, such as discrete cosine transform bases. Findings – The developed camera system for trajectory estimation is tested within the robotic assembly of a cylinder block in motion. The experimental results show that the proposed method is able to reconstruct arbitrary trajectories of an assembly point on a workpiece moving in 3D space. Research limitations/implications – With the developed technology, a point trajectory can be recovered offline only after all measurement images are acquired. For practical assembly tasks in real production, this method should be extended to determine the trajectory online during the motion of a workpiece. Practical implications – For practical, robotic assembly in motion, such as assembling tires, wheels and windscreens on conveyed vehicle bodies, the developed technology can be used for positioning a moving workpiece, which is in the distant field of an assembly robot. Originality/value – Besides laser trackers, indoor global positioning systems and stereo cameras, this paper provides a solution of trajectory estimation by using a monocular camera system.

RINDLER FORCE AT LARGE DISTANCES

Given some assumptions, it is possible to derive the most general post-general relativistic theory of gravity for the distant field of a point mass. The force law derived from this theory contains a Rindler term in addition to well-known contributions, a Schwarzschild mass and a cosmological constant. The same force law recently was confronted with solar system precision data. The Rindler force, if present in Nature, has intriguing consequences for gravity at large distances. In particular, the Rindler force is capable of explaining about 10% of the Pioneer anomaly and simultaneously ameliorates the shape of galactic rotation curves.