A comparison of traceable spatial angle autocollimator calibrations performed by PTB and VTT MIKES

Metrologia ◽  
2021 ◽  
Author(s):  
Ralf D Geckeler ◽  
Matthias Schumann ◽  
Andreas Just ◽  
Michael Krause ◽  
Antti Lassila ◽  
...  
Keyword(s):  
Broad Spectrum ◽  
Measurement Errors ◽  
Systematic Measurement ◽  
Motivating Factors ◽  
Optical Surface ◽  
Transfer Standard ◽  
Surface Normal ◽  
National Metrology Institutes ◽  
Wide Range ◽  
The Creation

Abstract Autocollimators are versatile devices for angle metrology used in a wide range of applications in engineering and manufacturing. A modern electronic autocollimator generally features two measuring axes and can thus fully determine the surface normal of an optical surface relative to it in space. Until recently, however, the calibration capabilities of the national metrology institutes were limited to plane angles. Although it was possible to calibrate both measuring axes independently of each other, it was not feasible to determine their crosstalk if angular deflections were present in both axes simultaneously. To expand autocollimator calibrations from plane angles to spatial angles, PTB and VTT MIKES have created dedicated calibration devices which are based on different measurement principles and accomplish the task of measurand traceability in different ways. Comparing calibrations of a transfer standard makes it possible to detect systematic measurement errors of the two devices and to evaluate the validity of their uncertainty budgets. The importance of measurand traceability via calibration for a broad spectrum of autocollimator applications is one of the motivating factors behind the creation of both devices and for this comparison of the calibration capabilities of the two national metrology institutes. The latter is the focus of the work presented here.

scholarly journals Barite-containing radiation protective building materials

2020 ◽  
Vol 21 (1) ◽  
pp. 94-98
Author(s):  
Nikolay V. Novikov ◽  
Svetlana V. Samchenko ◽  
Galina E. Okolnikova
Keyword(s):  
Building Materials ◽  
Protective Coatings ◽  
Relevant Literature ◽  
Cost Effective ◽  
Nuclear Facilities ◽  
Linear Absorption ◽  
Environmental Friendliness ◽  
Operational Characteristics ◽  
Wide Range ◽  
The Creation

Due to the active development of industries using nuclear technology, the creation of highly effective and cost-effective building materials for protection against hazardous ionizing radiation is of increasing interest. Widespread in the field of radiation-protective building materials are barite-containing concrete. The purpose of this article is to establish the prospects of their use in nuclear facilities, as well as to find ways to improve their technical and operational characteristics. For this an analysis of relevant literature and scientific research in the field of radiation-protective materials and, in particular, barite-containing concrete was carried out. The advantages of barite-containing concrete are high radiation-protective properties, environmental friendliness, high density, as well as economic indicators. The disadvantages are high susceptibility to shrinkage deformation and poor resistance to cyclic temperature effects. The addition of barite to the concrete composition allows to increase the coefficient of linear absorption of -rays of the material; also, with the proper selection of the composition, such material may have strength characteristics equal to or superior to the characteristics of concrete with standard compositions. Barite-containing materials have a wide range of applications and can be used both for the production of heavy concrete in the construction of load-bearing structures and in the creation of radiation-protective coatings for walls and floors.

scholarly journals SPECIALIZATION AS A SYSTEMIC TOOL FOR THE DEVELOPMENT OF THE GARMENT INDUSTRY IN DIGITALIZATION

2020 ◽  
Vol 2 (32) ◽  
pp. 68-74
Author(s):  
L.R. Girfanova ◽  
◽  
R.R. Abdyrasulova ◽  
Keyword(s):  
Product Life Cycle ◽  
Digital Technologies ◽  
Garment Industry ◽  
Additive Technologies ◽  
Light Industry ◽  
Digital Twin ◽  
Stage Of Development ◽  
Wide Range ◽  
The Creation ◽  
Digital Shadow

The development of digital technologies offers a wide range of opportunities to increase production efficiency, which relies on known tools and methods that transform in modern conditions. Many researchers note that the specialization most characteristic of complex knowledge-intensive industries has high prospects and is evident in all sectors of the national economy. Its combination with cooperation and outsourcing brings momentum to the development of both individual enterprises and the industry as a whole. It has been found that in light industry, which had a developed system of specializations, the return to this practice is difficult due to significant changes in the industries related to the liquidation of large mass production enterprises and the lag in the creation of digital twins, which are the basis at the stage of production preparation. Lost in the process of transition to a market economy, large production with a complete cycle is now successfully replaced by specialized small and medium-sized production, using high-performance equipment combined with modern digital technologies. It is obvious that the garment industry has entered a new cycle of development characterized by a high degree of specialization against the background of the application of digital technologies at all stages of the product life cycle. The significant lag in the application of digital technologies at the stage of production of light industry products is overcome, especially in the transition to additive technologies. It is noted that the digital shadow complements the information digital twin, which is especially relevant from the point of view of production. The introduction of digital technologies in specialized industries allows to achieve higher productivity and payback of invested capital than in standard production, where such investment is "blurred" due to the lag of related processes of the enterprise. It has been revealed that the modern stage of development of light industry is characterized by the application of fundamentally new technologies based on the creation of a digital twin and digital shadow, which create prerequisites for industrial application of additive technologies in industry. Key words: specialization, cooperation, digitalization, development of light industry

scholarly journals Рукописное наследие татарских ученых в фондах Института востоковедения Академии Наук Республики Узбекистан

Islamology ◽  
2019 ◽  
Vol 9 (1-2) ◽  
pp. 195
Author(s):  
Saidakbar Mukhammadaminov
Keyword(s):  
Wide Range ◽  
The World ◽  
The Creation ◽  
Oriental Studies ◽  
Academy Of Sciences

The article is dedicated to the manuscript heritage of Tatar scholars held in Abu Rayhan Beruni Institute of Oriental Studies of the Academy of Sciences of Uzbekistan, one of the richest manuscript repositories in the world. Works of manuscripts of Tatar theologians such as Abdurahim Utyz-Imyani, Abu al-Nasr Qursawi, Shihabaddin Mardjani, and Hisam al-Din b. Sharaf al- Din al-Bulgari, Kamal al-Din b. Siraj al-Din al-Uribfori al-Kazani, ̒Ayn al-Din b. Jalal al-Din al-Kazani, Abu al-Sharaf Husain b. Abu Umar al- Bulgari, Muhammad Latif b. Abdulislam al-Bulgari are analyzed. Based on a review of the manuscripts, it is established that some of them have not yet been catalogued. It is argued that the works of Tatar scholars were mainly devoted to religious subjects. The role of Tatar scholars in the creation of commentaries and works on legal, medical and Sufi terms is analyzed in order to make the works accessible to a wide range of people seeking knowledge.

Enhanced Method of Estimating Crude Oil Losses in a Unitized Pipeline Supply and Trunk Facilities

2021 ◽  
Author(s):  
Charles Enweugwu ◽  
Aghogho Monorien ◽  
Ikechukwu Mbeledogu ◽  
Adewale Dosunmu ◽  
Omowunmi Illedare
Keyword(s):  
Artificial Intelligence ◽  
Crude Oil ◽  
Measurement Errors ◽  
Oil And Gas ◽  
Equitable Distribution ◽  
Trunk Line ◽  
Wide Range ◽  
Marginal Field ◽  
Oil And Gas Companies ◽  
Two Alternatives

Abstract Most unitized Pipelines in Nigeria are Trunk lines which take crude oil from flow stations to the Terminals. Very few International Oil and Gas Companies own and operate trunk lines in Nigeria. As a result, marginal field owners, independent producers, and some JV partners share the trunk line for the sale of their crude. But because of the use of wide range of non-compliant meters by the injectors into the trunk lines a lot of line losses due to measurement errors are introduced. Another major feature is that trunk lines are exposed to leakages due to sabotage, aged pipeline and valve failures. The issue here is how does the owner of the trunk line back allocate these losses to their respective injectors. The Reverse Mass Balanced Methodology (RMBM) is currently in use having replaced Interim Methodology (IM) in 2017. In RMBM, the crude trunk line losses have been found to be unaccountable and it's proportionate rule for distribution of the losses to the producers are inequitable as the field owners expressed dissatisfaction with unfair deduction from trunk line operators. This study developed a procedure and an algorithm for estimation of crude contributions from each producer at the Terminal and equitable distribution of crude trunk line losses to the producers irrespective of the type of meters, meter factor and leakages and sporadic theft on the trunk lines. This study also identified two alternatives to the RMBM, the use of Artificial Intelligence (AI) and Flow based models. The results showed that flow-based model accounts for both individual and group losses, not accounted for in the RMBM, and allocates and corrects for leak volumes at the point of leak instead of at the terminal. This is a significant improvement from the RMBM.

Quantifying and Accounting for Uncertainty

2003 ◽  
Author(s):  
Yoram Rubin
Keyword(s):  
Measurement Errors ◽  
Model Error ◽  
Comprehensive Treatment ◽  
Modeling Error ◽  
Meandering Channel ◽  
Perfect Model ◽  
Wide Range ◽  
Conductivity Parameter ◽  
Parameter Error

This chapter deals with a wide range of issues with a common theme: coping with uncertainty. To this end, we look at the sources of uncertainty and the types of errors we need to deal with. We then explore methods for identifying these errors and for incorporating them into our predictions. This chapter extends our discussion on these topics in chapter 1, the discussion in chapter 3 on estimation under conditions of uncertainty, and image simulation using MC techniques. A comprehensive treatment of uncertainty needs to address two different types of errors. The first type is the model error, which arises from incorrect hypotheses and unmodeled processes (Gaganis and Smith, 2001), for example, from poor choice of governing equations, incorrect boundary conditions and zonation geometry, and inappropriate selection of forcing functions (Carrera and Neuman, 1986b). The second type of error is parameter error. The parameters of groundwater models are always in error because of measurement errors, heterogeneity, and scaling issues. Ignoring the effects of model and parameter errors is likely to lead to errors in model selection, in the estimation of prediction uncertainty, and in the assessment of risk. Parameter error is treated extensively in the literature: once a model is defined, it is common practice to quantify the errors associated with estimating its parameters (cf. Kitanidis and Vomvoris, 1983; Carrera and Neuman, 1986a, b; Rubin and Dagan, 1987a,b; McLaughlin and Townley, 1996; Poeter and Hill, 1997). Modeling error is well recognized, but is more difficult to quantify. Let us consider, for example, an aquifer which appears to be of uniform conductivity. Parameter error quantifies the error in estimating this conductivity. Modeling error, on the other hand, includes elusive factors such as missing a meandering channel somewhere in the aquifer. This, in essence, is the difficulty in determining modeling error; parameter error can be roughly quantified based on measurements if one assumes that the model is correct, but modeling error is expected to represent all that the measurements and/or the modeler fail to capture. To evaluate model error, the perfect model needs to be known, but this is never possible.

22. The Creation of Mortgages

2019 ◽  
pp. 677-690
Author(s):  
Barbara Bogusz ◽  
Roger Sexton
Keyword(s):  
Wide Range ◽  
Explanatory Text ◽  
The Creation ◽  
Definition Of ◽  
Primary Materials

Titles in the Complete series combine extracts from a wide range of primary materials with clear explanatory text to provide readers with a complete introductory resource. This chapter discusses mortgage creation. It covers the definition of a mortgage; form of a legal mortgage of a fee simple before 1926; equitable right to redeem; equity of redemption; mortgagor retaining possession; legal mortgages after 1925 where land is unregistered; legal mortgages of registered land; charge by way of legal mortgage; types of mortgages; mortgages of leases; equitable mortgage by deposit of deeds (unregistered land); equitable mortgage of registered title (deposit of land certificate); and legal and equitable mortgages after 1989.

18. Creation of Express and Implied Grant of Easements

2019 ◽  
pp. 558-580
Author(s):  
Barbara Bogusz ◽  
Roger Sexton
Keyword(s):  
Wide Range ◽  
Explanatory Text ◽  
The Creation ◽  
The Law ◽  
Compulsory Purchase ◽  
Primary Materials

Titles in the Complete series combine extracts from a wide range of primary materials with clear explanatory text to provide readers with a complete introductory resource. This chapter discusses the rules on the creation of an easement. Topics covered include express grant of easements (and profits); express reservation of easements (and profits); implied grant of easements (and profits), which includes ways of necessity, intended easements, the rule in Wheeldon v Burrows and s62 of the Law of Property Act 1925; implied reservation of easements covering necessity and intended easements; exclusion of the rules providing for implied grant and reservation; compulsory purchase and the rules for implied grant; and simultaneous sales or bequests.

Model Worlds

2019 ◽  
pp. 250-330
Author(s):  
Caitlín Eilís Barrett
Keyword(s):  
Material Culture ◽  
Broad Spectrum ◽  
Religious Identity ◽  
Three Dimensional ◽  
Interactive Model ◽  
Domestic Material Culture ◽  
The Creation ◽  
Domestic Cult

Expanding current constructions of Nilotica, chapter 6 examines the creation of three-dimensional “Egyptian” landscapes through garden statuary and water features at the Casa di Acceptus e Euhodia. Sidestepping unproductive debates about whether garden statuary signified “religion” or “Egyptomania,” this case study shows how “Egyptianizing” statuary collaborated with the garden’s other contents to create an interactive model landscape. Some evidence from this house suggests that its inhabitants may have directed a domestic cult toward a form of Isis. However, this chapter argues that such practices should not overdetermine our understanding of the garden assemblage. Rather than a binary divide between “Isiacs” and “non-Isiacs,” evidence suggests a broad spectrum of available religious choices. Furthermore, domestic material culture does not correspond to religious identity in a simple or straightforward way. Regardless of their relationship (or lack thereof) to Egyptian-derived cults, most Pompeians appear to have employed domestic Aegyptiaca and Nilotica in fairly similar ways.

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