Constructional Aspects for Safe Operation of 120 × 570 mm Ammunition

This paper provides a characteristic of the design of 120 × 570 mm tank ammunition with particular reference to the cartridges in service in the Polish Army. The presentation of the design and technological details was primarily focused on emphasising their influence on the phenomena occurring or likely to occur during the process of ammunition operation, and to a much lesser extent related with the reference of the characteristics of the performance of the ammunition. Due to the sheer bulk of this subject matter, this paper narrowed the issues of ammunition primarily to the aspects of entry into service, transport, storage, and operation of the specified ammunition cartridges. During these operational stages, there was major focus on the issues of ammunition safety and reliable performance. Note that these aspects are not exhaustive for the topic; this paper also serves as an introduction to a future paper which will deal with safety issues during combat operation using the 120 × 570 mm tank ammunition cartridges.

Maxwell–Cattaneo double-diffusive convection: limiting cases

Double-diffusive convection, in which a fluid is acted upon by two fields (such as temperature and salinity) that affect the density, has been widely studied in areas as diverse as the oceans and stellar atmospheres. Assuming classical Fickian diffusion for both heat and salt, the evolution of temperature and salinity are governed by parabolic advection–diffusion equations. In reality, there are small extra terms in these equations that render the equations hyperbolic (the Maxwell–Cattaneo effect). Although these corrections are nominally small, they represent a singular perturbation and hence can lead to significant effects when the underlying differences of salinity and temperature are large. In this paper, we investigate the linear stability of a double-diffusive fluid layer and show that amending Fick's law for the temperature, or the salinity, alone can lead to new modes of oscillation and to very large changes in the preferred wavelength of oscillatory convection at onset. In particular, the salt finger regime of classical double diffusion is here replaced by Maxwell–Cattaneo oscillations when the salt concentration is very high. The more complicated case when both laws are amended is left to a future paper, now in preparation.

Two Way Coupled Fields Multi-Physics Modeling Is Investigated as an Additional Approach to Address Fluid Elastic Instability

Two way coupled fields multi-physics modeling is investigated as an additional approach to address out-of-plane FEI. It is established in the literature that to model the damping-controlled fluid elastic instability, a finite time delay between tube vibration and fluid perturbation must be realized. The phase lag between tube vibration and flow perturbation due to damping must be adequately captured by the model. The effects of tube frequency, turbulence level, location, and mean gap velocity on the relative phase values must also be captured. This approach will allow the time delay between tube vibration and flow perturbation due to damping, as well as turbulence, and stiffness to be intrinsically modeled. We will introduce the applicability of the method to in-plane FEI in a future paper once we have based lined it against out of plane FEI empirical results.

Considerations Regarding the Valence and Diversity of Operations Research Models

Operations research(OR), also called decision optimization science, is the one that provides mathematical models meant to lead to finding the optimal variant in an economic, military, social, political, etc. type of activity. These are methods with a major potential, highlighted since the emergence of the models used in World War II actions and later in various other fields, especially in western countries. This paper aims to highlight the benefits of using OR techniques over time and especially to highlight its applicability. In this paper we summarize the presentation of the evolution and contributions of Operational Research in various fields until the ‘60s, a future paper will deal with the time frame 1960-2020.

A Single-Step Synthesis of 1,3,4,6-Tetraaryl-5-Aryliminopiperazin-2-One

We report here novel reaction that we found unprecedented, up to our knowledge. In a single step, we obtained unusual result. After magnificent efforts we could deduce the structure. We confirmed the structure of this product by reproducing the reaction using other substrates. The reaction therefore resulted in a piperazine ring that is functionalized on every atom in the ring. This was stage 1. We almost finished making this reaction more utilizable (stage 2) in a future paper. Enjoy it because you won't see a new chemistry everyday.

A Single-Step Synthesis of 1,3,4,6-Tetraaryl-5-Aryliminopiperazin-2-One

We report here novel reaction that we found unprecedented, up to our knowledge. In a single step, we obtained unusual result. After magnificent efforts we could deduce the structure. We confirmed the structure of this product by reproducing the reaction using other substrates. The reaction therefore resulted in a piperazine ring that is functionalized on every atom in the ring. This was stage 1. We almost finished making this reaction more utilizable (stage 2) in a future paper. Enjoy it because you won't see a new chemistry everyday.

INDOOR SPACE ROUTING GRAPHS: VISIBILITY, ENCODING, ENCRYPTION AND ATTENUATION

<p><strong>Abstract.</strong> The conventional approach to path planning for indoor navigation is to infer routes from a subdivided floor map of the indoor space. The floor map describes the spatial geometry of the space. Contained in this floor map are logical units called subspaces. For the purpose of path planning the possible routes between the subspaces have to be modelled. Typical these models employing a graph structures, or skeletons, in which the interconnected subspaces (e.g., rooms, corridors, etc.) are represented as linked nodes, i.e. a graph.</p><p>This paper presents a novel method for creating generalised graphs of indoor spaces that doesn’t require the subdivision of indoor space. The method creates the generalised graph by gradually simplifying/in-setting the floor map until a graph is obtained, a process described here as chained deflation. The resulting generalised graph allows for more flexible and natural paths to be determined within the indoor environment. Importantly the method allows the indoor space to be encoded and encrypted and supplied to users in a way that emulates the use of physical keys in the real world. Another important novelty of the method is that the space described by the graph is adaptable. The space described by the graph can be deflated or inflated according to the needs of the path planning. Finally, the proposed method can be readily generalised to the third dimension.</p><p>The concept and logic of the method are explained. A full implementation of the method will be discussed in a future paper.</p>

Editorial

We are excited to announce that, starting with this issue 17(1), our journal Studies in Communication Sciences (SComS) will be published Open Access on the HOPE platform of the Hauptbibliothek of the University of Zurich; you can access our new SComS at www.scoms.ch. HOPE refers to Hauptbibliothek Open Publishing Environment. Located in and managed by a Swiss academic institution, this platform provides full open access to SComS contents, with a strong commitment to a transparent and qualitatively excellent publication process, whilst guaranteeing no publishing fees for our authors. We are grateful to Elsevier for our collaboration, which lasted from 2012 to 2016; now the moment has come for us to be open to the future. Paper copies of our new SComS will still be available – for example, in the main libraries at Swiss universities; but all the contents will be also freely available for everybody to download from our website.

An Experiment-Based Sticking Model for Heated Sand

A hot sand model has been developed to predict the rebounding and sticking behavior of environmental particulates in the hot section of a gas turbine. This paper will focus on the sticking part of the model with rebounding effects to be discussed in a future paper. The key element of the model is determining the probability of the particle sticking to the surface when it comes into contact. Recent studies have suggested this sticking probability is a function of temperature, particle size, normal and tangential velocities of the impacting particle. Previous studies have predicted the sticking probability using theories for mechanical properties of the particles. These methods rely on idealized particle shapes and compositions which does not match the variable nature of sand in the environment. The current model attempts to take this randomness into account and ensure prediction accuracy by matching the model to results of a series of controlled coupon tests. The framework for the modeling approach and validation results of the developed predictive model are both presented.

Mental capacity and deprivation of liberty: the Law Commission’s consultation paper

Purpose – The purpose of this paper is to introduce the readership to the consultation being held by the Law Commission concerning proposed revisions to the Deprivation of Liberty Safeguards (DoLS). Design/methodology/approach – Discussion of the consultation being held by the Law Commission concerning proposed revisions to the DoLS. Findings – These are as yet unknown as the consultation period is ongoing – it is planned that a future paper will examine the findings and recommendations from the consultation process. Practical implications – There has been criticism of the DoLS since their introduction in 2009. A new scheme provides the opportunity to respond to some of the criticisms and to develop more appropriate processes. The paper invites readers to take part in the consultation process and to respond to the proposals that have been developed. Social implications – A new and more appropriate scheme would be beneficial for service users and families/caregivers. Originality/value – This is the first opportunity for a revision to the DoLS scheme and introduction of the proposed scheme and the consultation process to the readership is highly appropriate and valuable to the Journal.