ASSESSMENT OF THE EFFECT OF STABILIZATION WORKS AT THE RIVER CONFLUENCE DESAGUADERO -JACHJAHUIRA, BOLIVIA

MAURICIO ROMERO M.,MARCELO HEREDIA G. 한국수자원학회 2005 한국수자원학회 학술대회 Vol.2005 No.1

Identification of geometric parameters of a parallel robot by using a camera calibration technique

Mauricio Arredondo-Soto,Mario A. García-Murillo,J. Jesús Cervantes-Sánchez,Felipe J. Torres,Hector A. Moreno-Avalos 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.2

This work reports a novel method to estimate the geometrical parameters of a 2-(3-RRPS) parallel robot intended for manufacturing tasks. The method uses camera calibration techniques, and it is based on the concept of vertex space. The advantage of this technique is that the system does not require complex electronic instrumentation, and only uses a CCD camera as a main sensor and planar patterns, which makes it portable, accurate and low cost. To ensure the quality of the measurements, a methodology for characterization of the measurement system is included. The applicability and the advantages of using the proposed method are shown by means of the estimation of the geometrical dimensions of a spatial parallel manipulator with a relatively complex kinematic architecture. Experiments are conducted and show a significant improvement in manipulator accuracy when the parameters estimated with this technique are used.

Cu Extractability and Uptake By Maize (zea Mays L.) and Ryegrass (lolium Perenne L.) Plants In a Contaminated Soil Amended with Manure, Compost and Compost-Derived Humic Acids

Mauricio Molina,Ana Beatriz Torres,Rodrigo Ortega 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Facial and occlusal esthetic improvements of an adult skeletal Class III malocclusion using surgical, orthodontic, and implant treatment

Mauricio de Almeida Cardoso,Rafael Scaf de Molon,Erica Dorigatti de Avila,Fabio Pinto Guedes,Valter Antonio Ban Battilani F,Leopoldino Capelozza Filho,Marcio Aurelio Correa,Hugo Nary Filho 대한치과교정학회 2016 대한치과교정학회지 Vol.46 No.1

The aim of this clinical report is to describe the complex treatment of an adult Class III malocclusion patient who was disappointed with the outcome of a previous oral rehabilitation. Interdisciplinary treatment planning was performed with a primary indication for implant removal because of marginal bone loss and gingival recession, followed by orthodontic and surgical procedures to correct the esthetics and skeletal malocclusion. The comprehensive treatment approach included: (1) implant removal in the area of the central incisors; (2) combined orthodontic decompensation with mesial displacement and forced extrusion of the lateral incisors; (3) extraction of the lateral incisors and placement of new implants corresponding to the central incisors, which received provisional crowns; (4) orthognathic surgery for maxillary advancement to improve occlusal and facial relationships; and finally, (5) orthodontic refinement followed by definitive prosthetic rehabilitation of the maxillary central incisors and reshaping of the adjacent teeth. At the three-year follow-up, clinical and radiographic examinations showed successful replacement of the central incisors and improved skeletal and esthetic appearances. Moreover, a Class II molar relationship was obtained with an ideal overbite, overjet, and intercuspation. In conclusion, we report the successful esthetic anterior rehabilitation of a complex case in which interdisciplinary treatment planning improved facial harmony, provided gingival architecture with sufficient width and thickness, and improved smile esthetics, resulting in enhanced patient comfort and satisfaction. This clinical case report might be useful to improve facial esthetics and occlusion in patients with dentoalveolar and skeletal defects.

Numeric Parser for Symbolic Representation of Rhythm

Mauricio Rodriguez(마우리치오 로드리게즈) 한국전자음악협회 2019 에밀레 Vol.17 No.-

리듬 구조를 수적으로 표현하는 것은, 리듬 배치 구성을 연산적으로 코딩하는 탄탄한 모델이 있음에도 불구하고, 오히려 제한적인 것으로 여겨지곤 한다. 리듬 형태를 극도로 압축한 시스템을 만든 계기는 다음과 같은 목적에 입각한다: 매우 복잡한 리듬 패턴도 아주 간단한 문자열로 나타낼 수 있기 때문에 1) 작곡할 때 새로운 리듬을 창작하거나 시도하는 것을 용이하게 하고, 2) 악보를 만드는 준비 과정을 최적화하고(예를 들어, 음악을 각인하거나 채보하는 작업을 수행할 때), 3) 컴퓨터 기반 환경에서 추가적인 작업 시 “리듬-트리<SUB> rhythm-tree(RT)</SUB>”를 수월하고 명확하게 표현하며, 4) 효율적인 컴퓨터 작업을 위함이다. 이 표현 모델은, 오픈뮤직 <SUB>OpenMusic</SUB>, 패치워크<SUB>PatchWork</SUB>, 피더블류지엘 <SUB>PWGL</SUB>과 같은 커먼-리스프 <SUB>Common-LISP</SUB> 컴퓨터 기반 환경에서 제작되었으며, 여러 리듬 패턴들이 음악적 리듬을 아주 명확한 기호로 표현하는데 널리 쓰이는 리듬-트리의 형태로 전환되어 연산 파서(분석 프로그램)의 역할을 수행한다. 여기서 나타난 리듬의 수적 표현이 유용함과 탄탄함을 증명하는, 인터랙티브 “명령줄 <SUB>command-line</SUB>” 파서가 컴퓨터 기반 작곡을 위한 시각적 프로그램 환경으로서 피더블류지엘의 “표현적 기보 패키지” 장치들을 활용하여 개발되고 있다. A numeric representation of rhythmic structures is discussed as a rather constricted, nonetheless robust model for the computational encoding of rhythm configurations. The motivation for an extremely compressed encoding system of rhythmic patterns is grounded on the following observations: 1) to ease the creation and experimentation of rhythm for compositional use, 2) to optimize score preparation (e.g. to facilitate music engraving/transcription tasks), 3) to easily and clearly create “rhythm-tree” (RT) representations for further processing when working with computer-assisted environments, and 4) to efficiently handle computing labor since very complex rhythmic patterns can be represented with extremely simple strings of characters. This representation model is implemented as a computing parser written in Common-LISP to render rhythmic patterns into a “rhythmtree” (RT) representation, an extremely robust symbolization of music rhythm that is widely used in computer-assisted environments such as OpenMusic, PatchWork, and PWGL. To show the applicability and robustness of the numeric representation of rhythm presented here, an interactive “command-line” parser has been developed using the facilities of the “Expressive Notation Package” of PWGL, a visual programming environment for computer-assisted composition.

Acute Colonic Volvulus in a Mexican Population: A Case Series

Mauricio Gonzalez-Urquijo,Mario Rodarte-Shade,Gerardo Gil-Galindo 대한대장항문학회 2020 Annals of Coloproctolgy Vol.36 No.1

Purpose: Colonic volvulus constitutes a significant cause of large bowel obstruction in adults. Most studies of colonic volvulus come from high endemic zones and are limited by the small number of patients. In our region, there is a shortage of studies concerning this disorder, and treatment of colonic volvulus remains controversial. Methods: This is a retrospective study of 34 patients who presented with colonic volvulus at a single academic institution in a 4-year period and their respective treatment and outcomes. Results: A total of 34 patients, 17 males (50%) and 17 females (50%), with a mean age of 55 ± 23.9 years underwent treatment for colonic volvulus. Twelve patients (35.3%) underwent initial decompression, followed by a Hartman procedure in 4 patients (11.7%) and sigmoid resection with primary anastomosis in 3 patients (8.8%), with 3 fatalities (8.8%) following initial decompression. Two patients (5.8%) were lost to follow-up. Twenty-two patients (64.7%) underwent emergency surgery, of whom 16 (47%) underwent a Hartman procedure, with colorectal anastomosis in 9 patients (26.4%), with 3 fatalities (8.8%) immediately after the first procedure. Four patients (11.7%) were lost to follow up after the Hartman procedure. Of the 6 remaining patients (17.6%), of the emergency surgical group, 3 patients (8.8%) had an initial sigmoidectomy and primary anastomosis, and the remaining 3 patients (8.8%) had a cecal volvulus with a right hemicolectomy performed with primary anastomosis in 2 patients (5.8%) and with a fatality in the remaining patient, on whom a terminal ileostomy was performed for damage control. The mean hospital stay was 5.7 days, with an overall mortality rate of 23.5%. Conclusion: Acute colonic volvulus in our region is not as uncommon as in other parts of the world. This disorder must be suspected when a patient presents with abdominal pain, abdominal distension, and bean sign on plain X-rays and/or a whirl sign on computed tomography scan.

Seed Oil Ethoxylate Adjuvants and Their Influence on Retention and Rainfastness of the Contact Fungicide Mancozeb

Mauricio Hunsche,Michaela Schmitz-Eiberger,Georg Noga 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Modeling and identification of a class of MR fluid foam dampers

Mauricio Zapateiro,Ningsu Luo,Ellen Taylor,Shirley J. Dyke 국제구조공학회 2010 Smart Structures and Systems, An International Jou Vol.6 No.2

This paper presents the results of a series of experiments conducted to model a magnetorheological damper operated in shear mode. The prototype MR damper consists of two parallel steel plates; a paddle covered with an MR fluid coated foam is placed between the plates. The force is generated when the paddle is in motion and the MR fluid is reached by the magnetic field of the coil in one end of the device. Two approaches were considered in this experiment: a parametric approach based on the Bingham, Bouc-Wen and Hyperbolic Tangent models and a non parametric approach based on a Neural Network model. The accuracy to reproduce the MR damper behavior is compared as well as some aspects related to performance are discussed.

The Neighborly Relations between Middle Eastern Migrants and Indigenous People in Patagonia

Mauricio Dimant 한국라틴아메리카학회 2017 라틴아메리카연구 Vol.30 No.1

In February of 1910 the Argentine press reported the disappearance of dozens of Middle Eastern immigrants in Patagonia. According to the police department in charge of the investigation, at least several of the missing immigrants of Arab origin had been killed and eaten by local groups of indigenous people. Immigrants from the Middle East, who were vulnerable as newcomers to the region, did not respond to the crisis of murder and cannibalism as “Arabs” or as Argentineans, but as Patagonians. This kind of public behavior opens a window not only to the importance of local identities at the subnational level in Argentina, but also the role of local and negative experiences in the integration of immigrants and ethnic minorities. This article explores the complexities of the interaction between immigrants from the Middle East and the indigenous population in Patagonia in order to rethink the local experience of ethnic-migrant minorities in Argentina. It argues that Argentine identity of Arabic-speaking immigrants in Patagonia emerged mainly as a result of shared local or regional interests rather than merely through an attachment to the federal state.

Isolation and Molecular Characterization of Xylella fastidiosa from Coffee Plants in Costa Rica

Mauricio Montero-Astua,Carlos Chacon-Diaz,Estela Aguilar,Carlos Mario Rodriguez,Laura Garita,William Villalobos,Lisela Moreira,John S. Hartung,Carmen Rivera 한국미생물학회 2008 The journal of microbiology Vol.46 No.5

Coffee plants exhibiting a range of symptoms including mild to severe curling of leaf margins, chlorosis and deformation of leaves, stunting of plants, shortening of internodes, and dieback of branches have been reported since 1995 in several regions of Costa Rica’s Central Valley. The symptoms are referred to by coffee producers in Costa Rica as “crespera” disease and have been associated with the presence of the bacterium Xylella fastidiosa. Coffee plants determined to be infected by the bacterium by enzyme linked immunosorbent assay (ELISA), were used for both transmission electron microscopy (TEM) and for isolation of the bacterium in PW broth or agar. Petioles examined by TEM contained rod-shaped bacteria inside the xylem vessels. The bacteria measured 0.3 to 0.5 μm in width and 1.5 to 3.0 μm in length, and had rippled cell walls 10 to 40 nm in thickness, typical of X. fastidiosa. Small, circular, dome-shaped colonies were observed 7 to 26 days after plating of plant extracts on PW agar. The colonies were comprised of Gram-negative rods of variable length and a characteristic slight longitudinal bending. TEM of the isolated bacteria showed characteristic rippled cell walls, similar to those observed in plant tissue. ELISA and PCR with specific primer pairs 272-1-int/272-2-int and RST31/RST33 confirmed the identity of the isolated bacteria as X. fastidiosa. RFLP analysis of the amplification products revealed diversity within X. fastidiosa strains from Costa Rica and suggest closer genetic proximity to strains from the United States of America than to other coffee or citrus strains from Brazil.