Optimization of the structure of titanium scaffolds reproducing the concellous bone

The paper presents the scopes of examination of the cancellous bone, 3D CAD design of scaffolds of the cancellous bone and their creation with a laser beam in SLM incremental technology. The geometrical size of the scaffold and the material feature corresponding to the Young's modulus are the parameters describing the porous structure of the cancellous bone. In the statistical analysis, these values are defined as independent variables. The physical properties of the scaffold are defined by the strength parameters determined by hardness (e.g. HIT, HM, HV and are dependent variables). The REGMULT multiple regression program was used to develop the research results. However, to optimize the porous structure of the scaffold, the single-criteria optimization program SYEQL3 was used.

Tržní riziko: zbytný předpoklad kvalifikace (investičního) fondu?

The current public regulation of investment funds affects a wide range of contractual or corporate investment plans. If the investment plan falls under this regulation, it can be implemented only with the appropriate permit (or registration) under the supervision of supervisory authorities. Any misconduct is strictly sanctioned. This paper aims to answer the key question of whether one of the necessary material features or assumptions of the investment fund is that the investor’s investment is exposed to market risk arising from the acquisition, holding, or sale of assets in this fund. Decision-making practice has shown in the past that this material feature of the investment fund can be interpreted differently, which has had and have to have an impact on the predictability of the legal environment, legal certainty for capital market participants, and the capital market as a whole.

A survey of numerical schemes for transportation equation

The convection-diffusion equation is a fundamental equation that exists widely. The convection-diffusion equation consists of two processes: diffusion and convection. The convection-diffusion equation can also be called drift-diffusion equaintion. The convection – diffusion equation mainly characterizes natural phenomenon in which physical particles, energy are transferred in a system. The well-known linear transport equation is also one kind of convection-diffusion equation. The transport equation can describe the transport of a scalar field such as material feature, chemical reaction or temperature in an incompressible flow. In this paper, we discuss the famous numerical scheme, Lax-Friedrichs method, for the linear transport equation. The important ingredient of the design of the Lax-Friedrichs Method, namely the choice of the numerical fluxes will be discussed in detail. We give a detailed proof of the L1 stability of the Lax-Friedrichs scheme for the linear transport equation. We also address issues related to the implementation of this numerical scheme.

A REVIEW OF MATERIAL COVER FEATURES FOR MITIGATING URBAN HEAT ISLAND

<p class="Body"><strong><em>Abstract</em></strong><strong><em></em></strong></p><p class="Body"><em>Urban Heat Island (UHI) is related to the increase of urban compared to rural temperature as the result of global phenomenon. The increase of temperature is predicted to be intensified along with the extend of urban activity in the near future. Therefore, the discussion on UHI becomes significance. This paper discusses the result of literature studies on thermal characteristics of materials that potentially used to reduce Urban Heat Island, especially in utilizing pavement and roof cover. </em><em> The result of the study concludes that the </em><em>reduction of UHI is determined by: 1) the high-level albedo (the ratio between the reflected heat and the absorbed heat) of material that is influenced by the color and texture of its surface; 2) The high level thermal emittance of material; 3) The lower capacity of material to store the heat. 4) The capability thermal conductivity of material surface. Recommended pavements to reduce UHI are cool pavement, reflective pavement, porous pavers, permeable pavers, pervious pavement, water retaining pavement. Roof cover materials that reduce Urban Heat Island are Cool Roof and Green Roof. The design and toughness of materials should be considered to reduce UHI.<strong></strong></em></p><p class="Body"> </p><em>Keywords: Urban Heat Island, material feature, thermal performance.</em>

A view through a window: Social relations, material objects and locality

In this article the authors ask what it would mean to think sociologically about the window as a specific material and symbolic object. Drawing on qualitative analysis of a series of comparative interviews with residents in three different streets in a diverse local area of Glasgow, they explore what the use and experience of windows tells us about their respondents’ very different relationships to the places where they live. On the one hand, the window, as a material feature of the home, helps us grasp the lived reality of class inequality and how such inequality shapes people’s day-to-day experience. On the other hand, windows are symbolically charged objects, existing at the border of the domestic and public world. For this reason, they feature in important ways in local debates over the appearance, ownership and conservation of the built environment. The article explores these struggles, and shows what they reveal about the construction of belonging in the neighbourhood, a process which is both classed and racialised at one and the same time.

Material feature representation and identification with composite surfacelets

Computer-aided materials design requires new modeling approaches to characterize and represent fine-grained geometric structures and material compositions at multiple scales. Recently, a dual-Rep approach was developed to model materials microstructures based on a new basis function, called surfacelet. As a combination of implicit surface and wavelets, surfacelets can efficiently identify and represent planar, cylindrical, and ellipsoidal geometries in material microstructures and describe the distribution of compositions and properties. In this paper, these primitive surfacelets are extended and composite surfacelets are proposed to model more complex geometries. Composite surfacelets are constructed by Boolean operations on the primitives. The surfacelet transform is applied to match geometric features in three-dimensional images. The composition of the material near the identified features can then be modeled. A cubic surfacelet and a v-joint surfacelet are developed to demonstrate the reverse engineering process of retrieving material compositions from material images. Highlights Modeling material distribution and edge singularity with composition of implicit surfaces. Identifying edge features in images with surface integrals and surfacelet transform. Enabling reverse engineering of materials with parametric representation.

Authenticity of the Sign: Travels of a Lahu Song1

This is a paper about a song which requires rather complex semiotic operations to be Lahu. The Wedding Oath song indexes, in different contexts, a desirable modern quality in a pre-modern society, a connection between an ethnic minority group and the modern state which implies obligations toward that ethnic group, and the positive quality of cosmopolitanism as a characteristic of a modern nation state. The nature of authenticity as a feature of these indexical relationships creates the possibility that one might extend Mendoza-Denton’s (2011) concept of “semiotic hitchhiker” to incorporate a non-material feature of a discursive performance.