Introduction

This chapter introduces the idea of an ecumenical repertoire of “metaphors of eucharistic presence” and situates the book within discussions of metaphor, language, and embodiment in liturgical theology. It proposes an “additive method” that allows metaphors with different entailments to stand alongside one another as complementary rather than contradictory. Five motifs—identity, representation, change, containment, and conduit—are introduced, each of which will be more fully explored in later chapters. Each includes one or more verbal affirmations churches could be invited to endorse. The chapter concludes with some notes on the scope of the project and how it is informed by the author’s Anglican perspective.

Alternative Materials for Printed Circuit Board Production: An Environmental Perspective

This article investigates the potential environmental impacts of four-layer printed circuit board (PCB) production from cradle to grave. The study starts with a lifecycle assessment of conventional PCB production. Then, the alternative materials of polyethylene terephthalate (PET), polylactic acid (PLA)/glass fiber composite and paper are investigated for the substrate. A conventional PCB adopts copper as the conductive material and requires an etching process. The environmental impacts of changing the conductive deposition method to an additive method by printing silver nanoparticles is studied. In a conventional PCB, electricity generation contributes 41% of the global warming potential (GWP) and 38% of the abiotic resource depletion (ADP), in the fossil category. By applying an additive manufacturing method, the GWP of PCB manufacturing can be reduced to 14% of that of the conventional method. A sensitivity analysis of silver recycling illustrates that a 40% higher silver recycling rate would decrease the GWP of silver material by about 48–60%. Uncertainty in the energy consumption of PCB production would alter the environmental impacts; however, even with the most conservative energy consumption in a conventional PCB production method, the environmental impacts of the additive method are about five times lower than those of conventional PCB production.

Influence of Surfacing Modes on the Formation of Pores in the Deposited Metal Produced by Wire Arc Additive Method (WAAM) Using Al-Mg Alloy

This paper presents studies about the influence of the surfacing mode on the formation of defects in the deposited metal produced by WAAM using Al-Mg alloy. As the main parameters that affected on the surfacing mode were the travel speed and the frequency of current pulses. Graphs about an influence of the travel speed on a size of pores and an influence the frequency of current pulses on a specific area of pores were constructed. It was concluded that with increasing of the surfacing speed, the size of defects decreased. Increasing the frequency of current pulses affected on increasing the specific area of pores. Changing the frequency of the current pulses leads to a change in the metal transfer. When using large-drop transfer metal, the defect concentration is minimal, but when using small-drop transfer, the arc stability decreases, which contributes to a higher pore concentration in the deposited metal.

EXPERIMENTAL ASSESSMENT OF THE EFFECT OF EXPOSURE LEVEL ON THE RESOLUTION OF A DIGITAL PHOTOGRAPHIC SYSTEM

While photographing in a wide range of brightness within the frame, the exposure devices must provide exposure control for each elementary area of ​​the frame, i.e., provide local exposure control. Cameras which equipped by well-known exposure devices with local exposure control is used a multiplicative, additive or multifunction method of image recording. Using of the multiplicative method leads to energy losses in the optical channel, which requires correction of the exposure control parameters. Using of the additive method makes it possible to reduce the effective shutter speed, but reduces the contrast of small images. The multiplicative method of image registration allows to suppress low-informative low-frequency components of the spectrum of the input signal, providing less losses from the image blur according to the multiplicative method and less losses from reducing the contrast of images of small parts according to the additive method. Comparative evaluation of cameras’ effectiveness which are equipped by exposure devices with local exposure control, which are based on different methods of image registration, is convenient to assess the criterion of "resolution averaged over the frame field". According to the developed methodology of evaluating the effectiveness of this type of cameras, the averaged field resolution can be calculated in several ways, each of which assumes a preliminary calculation or obtaining the dependence of resolution from exposure (resolvometric characteristics of the camera). The methodology of experimental determination of the resolvometric characteristic of a photographic image recorder equipped by exposure devices of local exposure control is proposed. This methodology is illustrated by the example of measuring the resolvometric characteristics of the digital camera nex-6 for different external conditions. The good convergence of results of theoretical and experimental researches is shown. The proposed methodology can be used in studies of the impact of the process of the multifunction method of image recording on the photographing efficiency. Keywords: image; resolution; measure; camera

Precision, Applicability, and Economic Implications: A Comparison of Alternative Biodiversity Offset Indexes

The rates of ecosystem degradation and biodiversity loss are alarming and current conservation efforts are not sufficient to stop them. The need for new tools is urgent. One approach is biodiversity offsetting: a developer causing habitat degradation provides an improvement in biodiversity so that the lost ecological value is compensated for. Accurate and ecologically meaningful measurement of losses and estimation of gains are essential in reaching the no net loss goal or any other desired outcome of biodiversity offsetting. The chosen calculation method strongly influences biodiversity outcomes. We compare a multiplicative method, which is based on a habitat condition index developed for measuring the state of ecosystems in Finland to two alternative approaches for building a calculation method: an additive function and a simpler matrix tool. We examine the different logic of each method by comparing the resulting trade ratios and examine the costs of offsetting for developers, which allows us to compare the cost-effectiveness of different types of offsets. The results show that the outcomes of the calculation methods differ in many aspects. The matrix approach is not able to consider small changes in the ecological state. The additive method gives always higher biodiversity values compared to the multiplicative method. The multiplicative method tends to require larger trade ratios than the additive method when trade ratios are larger than one. Using scoring intervals instead of using continuous components may increase the difference between the methods. In addition, the calculation methods have differences in dealing with the issue of substitutability.

Oral Health and Related Quality of Life in Older People: A Systematic Review and Meta-Analysis

Background: Of the most important implications and complaints in the elderly group of the population, is oral and dental health problems. This study aimed to assess oral health- related quality of life in older people. Methods: To data collection, databases were searched including PubMed, EMBASE, Scopus, SID, MagIran, Cochrane Central Register of Controlled Trials and scholar google The keywords were “older adults", “Geriatric” Elderly", "Older", “Aged”, "Ageing", "Oral health", "Oral hygiene" and "Quality of life", "QOL. For manual searching, several specialized journals of related scope as well as the finalized articles' reference list were searched. Studies from 1st Jan 2000 to 30th Jan 2017 were included. Studies were subjected to meta-analysis to calculate indexes, using CMA:2 (Comprehensive Meta-Analysis) software. Results: Totally, 3707 articles were searched that 48 of them were subjected to the oral and dental health-related quality of life in 59 groups of the elderly population with the mean age of 73.57+6.62 in the 26 countries. The obtained percentage values of dental and oral health were 80.2% (0-60), 14.8% (0-12), 16.4% (0-70), 22% (0-14 or 0-59) and 19.2% (0-196) for GOHAI with the additive method, GOHAI with Simple Count Method, OHIP14 with the additive method, OHIP-14 with Simple Count method and OHIP-49 with additive method indexes, respectively. Conclusion: The elderly group of the population had no proper oral health-related quality of life. Regarding the importance and necessity of oral and dental health and its effect on general health care in the target group, it is recommended to improve dental hygiene in the mentioned group of population.