Deformed model sets and distorted Penrose tilings

2006 ◽  
Vol 221 (9) ◽  
Author(s):  
Bernd Sing ◽  
T. Richard Welberry
Keyword(s):  
Diffraction Pattern ◽  
Mathematical Concept ◽  
Model Sets ◽  
Model Set ◽  
Characteristic Features ◽  
Penrose Tilings ◽  
Insight Into

AbstractIn this article, we show how the mathematical concept of a deformed model set can be used to gain insight into the diffraction pattern of quasicrystalline structures. We explain what a deformed model set is, what its characteristic features are and how it relates to certain disorder phenomena in solids. We then apply this concept to distorted Penrose tilings,

Environmental model studies for the Istanbul master plan. Part I: hydrodynamical design basis and marine disposal of wastewater

1995 ◽  
Vol 32 (2) ◽  
pp. 141-148 ◽  
Author(s):  
I. S. Hansen ◽  
H. J. Vested ◽  
M. A. Latif
Keyword(s):  
Black Sea ◽  
Layer Structure ◽  
The Black Sea ◽  
Marmara Sea ◽  
Junction Area ◽  
3 Dimensional ◽  
Model Studies ◽  
Model Set ◽  
Characteristic Features ◽  
Set Up

A modelling study of the hydrodynamics and spreading of wastewater from existing and future outfalls in the Bosphorus region has been conducted applying a 3-Dimensional model. The modelling is based on SYSTEM 3, which is a general modelling system for baroclinic flow simulating unsteady currents, waterlevels, salinity and temperature within the model area. The model set-up covers the Black Sea-Bosphorus-Marmara Sea junction area. The set-up is calibrated by data from a dedicated field program and previous field experience. The model is designed to describe the characteristic features of the flow in the junction area such as the effects of variations in waterlevel differences between the Sea of Marmara and the Black Sea on the important two-layer structure in the strait and the flow fields generated by the upper layer jet in the Bosphorus-Marmara junction. This model has been applied for evaluation of disposal of wastewater and for the subsequent water quality studies. The general use of a baroclinic 3-D hydrodynamic model to simulate disposal of wastewater is discussed. Examples of the application of the model of the junction area to evaluate the different strategies for disposal of wastewater are presented.

scholarly journals Design of a structure model set for inorganic compounds based on ping-pong balls linked with snap buttons

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ryo Horikoshi ◽  
Hiroyuki Higashino ◽  
Yoji Kobayashi ◽  
Hiroshi Kageyama
Keyword(s):  
High School Students ◽  
Coordination Compounds ◽  
Periodic Structures ◽  
Inorganic Compounds ◽  
Structure Model ◽  
School Students ◽  
Model Sets ◽  
Ping Pong ◽  
Hands On ◽  
Model Set

Abstract Structure model sets for inorganic compounds are generally expensive; their distribution to all students in a class is therefore usually impractical. We have therefore developed a structure model set to illustrate inorganic compounds. The set is constructed with inexpensive materials: ping-pong balls, and snap buttons. The structure model set can be used to illustrate isomerism in coordination compounds and periodic structures of ceramic perovskites. A hands-on activity using the structure model set was developed for high school students and was well-received by them. Despite the concepts being slightly advanced for them, the students’ retention of the knowledge gained through the activity was tested a week after they completed the activity and was found to be relatively high, demonstrating the usefulness of the activity based on the structure model set.

scholarly journals Enhanced Language Model with Hybrid Knowledge Graph for Mathematical Topic Prediction

2021 ◽  
Author(s):  
Minghui Wu ◽  
Canghong Jin ◽  
Wenkang Hu ◽  
Yabo Chen
Keyword(s):  
Language Model ◽  
Real Data ◽  
Mathematical Concept ◽  
Fine Tuning ◽  
Knowledge Graph ◽  
Mathematics Knowledge ◽  
Hybrid Knowledge ◽  
Model Set ◽  
Set Up ◽  
Mathematical Topic

Understanding mathematical topics is important for both educators and students to capture latent concepts of questions, evaluate study performance, and recommend content in online learning systems. Compared to traditional text classification, mathematical topic classification has several main challenges: (1) the length of mathematical questions is relatively short; (2) there are various representations of the same mathematical concept(i.e., calculations and application); (3) the content of question is complex including algebra, geometry, and calculus. In order to overcome these problems, we propose a framework that combines content tokens and mathematical knowledge concepts in whole procedures. We embed entities from mathematics knowledge graphs, integrate entities into tokens in a masked language model, set up semantic similarity-based tasks for next-sentence prediction, and fuse knowledge vectors and token vectors during the fine-tuning procedure. We also build a Chinese mathematical topic prediction dataset consisting of more than 70,000 mathematical questions with topics. Our experiments using real data demonstrate that our knowledge graph-based mathematical topic prediction model outperforms other state-of-the-art methods.

A strategy for near-term success using knowledge-based systems

1987 ◽  
Vol 2 (3) ◽  
pp. 179-183 ◽  
Author(s):  
S. C. Laufmann
Keyword(s):  
Cost Effective ◽  
Valuable Insight ◽  
Specific Data ◽  
Knowledge Based System ◽  
Data Intensive ◽  
Knowledge Based ◽  
Effective Manner ◽  
Near Term ◽  
Characteristic Features ◽  
Insight Into

AbstractKnowledge-based System (KBS) technologies have been applied to a variety of knowledge-related tasks with varying degrees of success. Differentiating among classes of knowledge-related tasks, based on the amounts of problem-solving knowledge and case-specific data involved, can provide valuable insight into why this occurs. Based on this comparison, four classes of problems are described. One class, of data-intensive tasks, includes problem types that are difficult or impossible for humans to perform, yet may be solved in a cost-effective manner using currently accessible KBS technology. The characteristic features of problems in this class are given, together with an example of a successfully fielded knowledge-based system that solves a problem from this class.

scholarly journals Insight into boron-doped diamond Raman spectra characteristic features

Carbon ◽  
2017 ◽  
Vol 115 ◽  
pp. 279-284 ◽  
Author(s):  
V. Mortet ◽  
Z. Vlčková Živcová ◽  
A. Taylor ◽  
O. Frank ◽  
P. Hubík ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Characteristic Features ◽  
Insight Into

Uniform Distribution in Model Sets

2002 ◽  
Vol 45 (1) ◽  
pp. 123-130 ◽  
Author(s):  
Robert V. Moody
Keyword(s):  
Uniform Distribution ◽  
Physical Space ◽  
Pure Point ◽  
Internal Space ◽  
Compact Closure ◽  
Related Model ◽  
Model Sets ◽  
Distribution Property ◽  
Distribution Of Points ◽  
Model Set

AbstractWe give a new measure-theoretical proof of the uniform distribution property of points in model sets (cut and project sets). Each model set comes as a member of a family of related model sets, obtained by joint translation in its ambient (the ‘physical’) space and its internal space. We prove, assuming only that the window defining themodel set ismeasurable with compact closure, that almost surely the distribution of points in any model set from such a family is uniform in the sense of Weyl, and almost surely the model set is pure point diffractive.

Counseling for the Client Suffering from a Communication Disorder

1985 ◽  
Vol 16 (1) ◽  
pp. 11-15
Author(s):  
Kurt Kraetschmer
Keyword(s):  
Clinical Practice ◽  
Language Impairment ◽  
Family Counseling ◽  
Integrative Approach ◽  
Language Therapy ◽  
Language Impaired ◽  
Characteristic Features ◽  
Communicative Abilities ◽  
Insight Into

The paper discusses problems encountered in counseling and rehabilitating the client who suffers from a speech-language impairment which limits his communicative abilities and skills. The first part addresses questions germane to family counseling and provides insight into the problem of adequate environment for speech-language therapy. The second part propounds a classification of various speech-langulfge disorders which are frequently encountered in the clinical practice. It also describes the characteristic features of these disorders and appropriate intervention strategies. The last part presents two case studies from the clinical practice to show the results of an integrative approach to the rehabilitation of the speech-language impaired client.

scholarly journals Pycnodysostosis with Special Emphasis on Dentofacial Characteristics

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Aisha Khoja ◽  
Mubassar Fida ◽  
Attiya Shaikh
Keyword(s):  
Differential Diagnosis ◽  
Case Report ◽  
Bone Turnover ◽  
Autosomal Recessive ◽  
Autosomal Recessive Disorder ◽  
Great Emphasis ◽  
Treatment Goals ◽  
Oral Complications ◽  
Characteristic Features ◽  
Insight Into

Pycnodysostosis is an autosomal recessive disorder that manifests as osteosclerosis of the skeleton due to the defective osteoclasts mediated bone turnover. The diagnosis of this disorder is established on the basis of its characteristic features and must be differentially diagnosed with other bone disorders. Dental surgeons should be aware of the limitations and possible adverse oral complications such as osteomyelitis of bone in these patients. This will guide them in planning realistic treatment goals. This paper reports the clinical and radiographic features of pycnodysostosis with the great emphasis on its dentofacial characteristics. The aim of this case report is to give an insight into the etiology, pathogenesis, and differential diagnosis of this disorder and to prepare the dentists and maxillofacial surgeons to overcome the challenges in treating these patients.

scholarly journals Homokhátság - a special rural area affected by aridification in the Carpathian basin, Hungary

2017 ◽  
Vol 9 (1) ◽  
pp. 29-50 ◽  
Author(s):  
András Donát Kovács ◽  
Edit Hoyk ◽  
Jenő Zsolt Farkas
Keyword(s):  
Land Use ◽  
Local Economy ◽  
Rural Environment ◽  
Sustainable Rural Development ◽  
The Past ◽  
Starting Point ◽  
Emerging Issues ◽  
Specific Factors ◽  
Characteristic Features ◽  
Insight Into

Abstract In Hungary, the aridification primarily affects the Great Hungarian Plain, most specifically the “Homokhátság” area which is part of the Danube-Tisza Interfluve. On the basis of our experience gained in the past 15 years, we would like to give an insight into the complex problems of this rural region. Our starting point is the aridification process and water scarcity which are characteristic features of this area for the last century. We investigate the related problems in land use management such as unfavourable land use and vegetation changes and the challenges in the local economy and social sustainability. In this respect we introduce the emerging issues in agriculture, forestry and nature conservation which may be relevant in European context too. We have discovered specific factors related to the devaluation of the rural environment and found that significant part of the unfavourable phenomena can be explained by the combined effect of climatic changes, improper land use and inappropriate environmental management. Based on our findings we outline a possible regional pathway for a sustainable rural development.

scholarly journals Serum amyloid A (AA) type amyloidosis of the kidney and immune complex-mediated glomerulopathy in the setting of hyperimmunoglobulin E (Job’s) syndrome

2019 ◽  
Author(s):  
Miroslav Sekulic ◽  
Helmut G Rennke ◽  
Arash Rashidi
Keyword(s):  
Immune Complex ◽  
Serum Amyloid A ◽  
Kidney Biopsy ◽  
Elevated Serum ◽  
Pulmonary Infections ◽  
Amyloid A ◽  
Characteristic Features ◽  
Immunodeficiency Syndrome ◽  
Nephrotic Range Proteinuria ◽  
Insight Into

Abstract Hyperimmunoglobulin E syndrome (HIES) is a rare immunodeficiency syndrome with characteristic features of pulmonary infections, eczema, recurrent skin abscesses and elevated serum IgE. We present a case of an HIES patient referred for nephrology consultation with elevated serum creatinine and nephrotic-range proteinuria. The subsequent kidney biopsy revealed AA-type amyloidosis and a separate and distinct inactive immune complex-mediated glomerulopathy with frequent glomerular capillary wall and mesangial polyclonal deposits. Potential kidney pathology in the setting of HIES has not been well described previously, and this case provides insight into associated renal comorbidities faced by patients with this rare syndrome.

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