Computational aspects of guided wave based damage localization algorithms in flat anisotropic structures

Moll, Jochen,Torres-Arredondo, Miguel Angel,Fritzen, Claus-Peter Techno-Press 2012 Smart Structures and Systems, An International Jou Vol.10 No.3

Guided waves have shown a great potential for structural health monitoring (SHM) applications. In contrast to traditional non-destructive testing (NDT) methodologies, a key element of SHM approaches is the high process of automation. The monitoring system should decide autonomously whether the host structure is intact or not. A basic requirement for the realization of such a system is that the sensors are permanently installed on the host structure. Thus, baseline measurements become available that can be used for diagnostic purposes, i.e., damage detection, localization, etc. This paper contributes to guided wave-based inspection in anisotropic materials for SHM purposes. Therefore, computational strategies are described for both, the solution of the complex equations for wave propagation analysis in composite materials based on exact elasticity theory and the popular global matrix method, as well as the underlying equations of two active damage localization algorithms for anisotropic structures. The result of the global matrix method is an angular and frequency dependent wave velocity characteristic that is used subsequently in the localization procedures. Numerical simulations and experimental investigations through time-delay measurements are carried out in order to validate the proposed theoretical model. An exemplary case study including the calculation of dispersion curves and damage localization is conducted on an exemplary unidirectional composite structure where the ultrasonic signals processed in the localization step are simulated with the spectral element method. The proposed study demonstrates the capabilities of the proposed algorithms for accurate damage localization in anisotropic structures.

Computational aspects of guided wave based damage localization algorithms in flat anisotropic structures

Jochen Moll,Miguel Angel Torres-Arredondo,Claus-Peter Fritzen 국제구조공학회 2012 Smart Structures and Systems, An International Jou Vol.10 No.3

Guided waves have shown a great potential for structural health monitoring (SHM) applications. In contrast to traditional non-destructive testing (NDT) methodologies, a key element of SHM approaches is the high process of automation. The monitoring system should decide autonomously whether the host structure is intact or not. A basic requirement for the realization of such a system is that the sensors are permanently installed on the host structure. Thus, baseline measurements become available that can be used for diagnostic purposes, i.e., damage detection, localization, etc. This paper contributes to guided wave-based inspection in anisotropic materials for SHM purposes. Therefore, computational strategies are described for both, the solution of the complex equations for wave propagation analysis in composite materials based on exact elasticity theory and the popular global matrix method, as well as the underlying equations of two active damage localization algorithms for anisotropic structures. The result of the global matrix method is an angular and frequency dependent wave velocity characteristic that is used subsequently in the localization procedures. Numerical simulations and experimental investigations through time-delay measurements are carried out in order to validate the proposed theoretical model. An exemplary case study including the calculation of dispersion curves and damage localization is conducted on an exemplary unidirectional composite structure where the ultrasonic signals processed in the localization step are simulated with the spectral element method. The proposed study demonstrates the capabilities of the proposed algorithms for accurate damage localization in anisotropic structures.

Sufficiency of disclosure (Enablement Requirement) under the EPC

Glawe Delfs Moll,Christof Keussen 한국지식재산학회 2000 産業財産權 Vol.- No.9

Interfacial Polymerization of Reactive Block Polymers for the Preparation of Composite Ultrafiltration Membranes

Seo, Myungeun,Moll, David,Silvis, Craig,Roy, Abhishek,Querelle, Sarah,Hillmyer, Marc A. American Chemical Society 2014 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH - Vol.53 No.48

<P>Interfacial polymerization of an acid chloride-containing block polymer and a multivalent amine in the presence of a macroporous support was explored as a means to generate a nanoporous thin film composite (TFC) membrane potentially useful for ultrafiltration. When polylactide-<I>b</I>-poly(styrene-<I>co</I>-vinylbenzoyl chloride) (PLA-<I>b</I>-P(S-<I>co</I>-VBC)) in an organic phase and <I>m</I>-phenylenediamine (MPD) in an aqueous phase were used as the reactive block polymer and the amine, respectively, a block polymer thin film was successfully formed on a polysulfone support. This nanostructured film could be converted into a nanoporous layer by subsequent PLA etching under mild basic conditions. While most organic solvents used to dissolve PLA-<I>b</I>-P(S-<I>co</I>-VBC) damaged the support and decreased permeability of the resulting membrane, use of a mixture of methyl isobutyl ketone and acetonitrile produced a TFC membrane with high permeability.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/iecred/2014/iecred.2014.53.issue-48/ie5032259/production/images/medium/ie-2014-032259_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ie5032259'>ACS Electronic Supporting Info</A></P>

Optimal Regional Trade-Integration Schemes in North Africa: Toward a Pro-Industrialization Policy

( Simon Mevel ),( Jaime Moll De Alba ),( Nassim Oulmane ) 세종대학교 경제통합연구소 2016 Journal of Economic Integration Vol.31 No.3

This article examines the status of industrial production in North African Countries as well as the role that regional trade integration through free-trade agreements and trade facilitation may play in spurring this region’s reindustrialization. The study uses Applied General Equilibrium model to assess the potential impact of the establishment of a Continental Free Trade Area as well as the reduction of costs to trade across borders. This article also measures the additional impact of the implementation of the Great Arab Free Trade Area and, finally, a deeper free trade agreement among North African countries and the European Union. The main findings indicate that each free-trade agreement configuration will stimulate, in relative terms, North African countries’ exports from a number of main industries. Whereas industrial products represent the largest share of North African countries’ export gains to Africa in general, mining and energy dominate North African countries’ export gains to the rest of the Arab League and food dominates the exports to the European Union. Therefore, the establishment of the Continental Free Trade Area, accompanied by trade-facilitation measures, appears to be crucial in providing support for North African countries’ industrialization.

Data-driven physics for human soft tissue animation

Kim, Meekyoung,Pons-Moll, Gerard,Pujades, Sergi,Bang, Seungbae,Kim, Jinwook,Black, Michael J.,Lee, Sung-Hee Association for Computing Machinery 2017 ACM transactions on graphics Vol.36 No.4

Should the State of Israel pursue Krav Maga as an intangible cultural heritage of the Jewish people? History and politics say yes.

Guy Mor,Andrea Molle 국제무예학회 2021 International Journal of Martial Arts Vol.7 No.-

Krav Maga (‘contact combat’) is an Israeli combat discipline arguably one of the many intangible cultural heritages of Israel and the Jewish people. It has played a unique role in the (re)creation and preservation of the Jewish identity and the formation of the state of Israel. Recently we observe a growing academic literature debating the role of martial arts in international affairs and domestic political processes. It is the scope of this paper to contribute to this proposing a framework for understanding Krav-Maga as a means of cultural diplomacy as seen in other nations.

Endovascular Closure Resolves Trimethylaminuria Caused by Congenital Portosystemic Shunts

Ponce-Dorrego, Mar?a Dolores,Garzon-Moll, Gonzalo The Korean Society of Pediatric Gastroenterology 2019 Pediatric gastroenterology, hepatology & nutrition Vol.22 No.6

This study aimed to report three new cases of an association between two rare conditions, congenital portosystemic shunts (CPSS) and trimethylaminuria (TMAU), and the efficacy of endovascular closure of the CPSS for resolving TMAU. Between November 2014 and April 2017, 15 patients with CPSS were enrolled in this prospective study to assess the efficacy of percutaneous endovascular shunt closure. Three patients presented with clinical symptoms of TMAU that were confirmed by urine analysis of trimethylamine (TMA) and TMA n-oxide. One year after endovascular closure of the congenital portosystemic shunt, the same parameters were evaluated were obtained and the values were compared to the pretreatment values. The results indicated the disappearance of clinical symptoms of TMAU and normalization of the urine test parameters in two patients and no changes in one patient, who developed new portosystemic communications.

SMALL SCALE DAIRYING IN THREE FARMING SYSTEMS IN EAST JAVA II. ECONOMIC ANALYSIS OF DAIRYING

Widodo, M.W.,de Jong, R.,Moll, H.A.J. Asian Australasian Association of Animal Productio 1994 Animal Bioscience Vol.7 No.1

The indonesian government wishes to increase farmers' by encouraging dairy farming. Since 1980, imported dairy cattle have been distributed on credit. Survey data from 1990 were used to study the average milk sales per cow and the economic parameters of dairy production of a sample of farm households on seven milk cooperatives East Java Province, in three agro-ecological areas, oriented to sugar cane, cassava and horticulture, respectively. in general, dairy production proved not to be economically attractive as returns to labour were similar to the rates for agricultural labour. The returns showed marked differences among the three areas studied. They were highest in the horticultural area. Analysis of the dairy units according to size showed a tendency for inputs as well as revenue per cow to decline as herd size increased. It is argued that a further increase in milk production in East Java can be stimulated by raising the farm gate price of milk, or by expanding dairy production into suitable, new areas.

Endovascular Closure Resolves Trimethylaminuria Caused by Congenital Portosystemic Shunts

María Dolores Ponce-Dorrego,Gonzalo Garzón-Moll 대한소아소화기영양학회 2019 Pediatric gastroenterology, hepatology & nutrition Vol.22 No.6

This study aimed to report three new cases of an association between two rare conditions, congenital portosystemic shunts (CPSS) and trimethylaminuria (TMAU), and the efficacy of endovascular closure of the CPSS for resolving TMAU. Between November 2014 and April 2017, 15 patients with CPSS were enrolled in this prospective study to assess the efficacy of percutaneous endovascular shunt closure. Three patients presented with clinical symptoms of TMAU that were confirmed by urine analysis of trimethylamine (TMA) and TMA n-oxide. One year after endovascular closure of the congenital portosystemic shunt, the same parameters were evaluated were obtained and the values were compared to the pretreatment values. The results indicated the disappearance of clinical symptoms of TMAU and normalization of the urine test parameters in two patients and no changes in one patient, who developed new portosystemic communications.