Página 1 dos resultados de 909 itens digitais encontrados em 0.018 segundos

Towards a Computational Case-Based Model for Creative Planning

Macedo, Luís; Pereira, Francisco C.; Grilo, Carlos; Cardoso, Amílcar
Fonte: Universidade de Coimbra Publicador: Universidade de Coimbra
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
45.89%
This paper describes a computational case-based model for the creative planning process. Our approach is inspired in Wallas’ model for the creative process in that we consider that creativity involves a sequence of four stages: preparation, incubation, illumination and verification. Preparation includes problem acquisition and assimilation of background knowledge, which is represented by cases, i.e., documented past experiences. With the aim of achieving a flexible knowledge representation, as a means to potentiate specific creative abilities like Fluency, Synthesis and Analysis, we structure each case as a network of hierarchically and temporally related case pieces. These case pieces can be considered individually, providing better recombinations of them. These recombinations, rather than made by chance, are guided by those hierarchical and temporal case piece relations (or explanations). We explain the role of opportunistic knowledge acquisition at the incubation stage. We sustain that illumination may comprise recursive calls of the sequence of the first three stages. This computational model is implemented in the system INSPIRER (ImagiNation1 taking as Source Past and Imperfectly RElated Reasonings). An application in musical composition domain is presented. We also show how a musical composition task may be cognitively modelled and treated as a planning task. We also present a short example illustrating how INSPIRER generates music.

Composing music with case-based reasoning

Pereira, Francisco; Grilo, Carlos; Macedo, Luís; Cardoso, Amílcar
Fonte: Universidade de Coimbra Publicador: Universidade de Coimbra
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
35.85%
Music is one of the most intriguing and joyful domain of research and analysis. Driven by this insatiable curiosity, Musical Analysis has emerged to formally understand and structure music and its intrinsic intention and causality. Each complete analysis of a piece points to issues that go far beyond the normal graphical music representation. A better analysis is important not only to a better interpretation, but also to a more perfect composition. An exceptional composer is indeed an exceptional analyst. This paper presents a computational approach to music composition through the use and exploration of musical analysis. Centered on Case-Based Reasoning and Planning techniques, it consists on creating new solutions by keeping, transforming and extrapolating knowledge from already expert-made music analysis. For our approach, each analysis is represented as a precisely structured Case, divisible into all of its components. The process of composition we adopt is progressive, left-to-right, and top-to-bottom and has some similarities with (Wallas’ 1926) theory for creative production (Macedo et al. 1996a) which we adapted for this specifically structured and complex domain. The resulting implemented program has already generated several different musical pieces...

Towards a computational case-based model for creative planning

Macedo, Luís; Pereira, Francisco C.; Grilo, Carlos Fernando Almeida; Cardoso, Fernando Amílcar Bandeira
Fonte: Instituto Politécnico de Leiria Publicador: Instituto Politécnico de Leiria
Tipo: Conferência ou Objeto de Conferência
Publicado em /11/1996 ENG
Relevância na Pesquisa
45.89%
This paper describes a computational case-based model for the creative planning process. Our approach is inspired in Wallas’ model for the creative process in that we consider that creativity involves a sequence of four stages: preparation, incubation, illumination and verification. Preparation includes problem acquisition and assimilation of background knowledge, which is represented by cases, i.e., documented past experiences. With the aim of achieving a flexible knowledge representation, as a means to potentiate specific creative abilities like Fluency, Synthesis and Analysis, we structure each case as a network of hierarchically and temporally related case pieces. These case pieces can be considered individually, providing better recombinations of them. These recombinations, rather than made by chance, are guided by those hierarchical and temporal case piece relations (or explanations). We explain the role of opportunistic knowledge acquisition at the incubation stage. We sustain that illumination may comprise recursive calls of the sequence of the first three stages. This computational model is implemented in the system INSPIRER (ImagiNation1 taking as Source Past and Imperfectly RElated Reasonings). An application in musical composition domain is presented. We also show how a musical composition task may be cognitively modelled and treated as a planning task. We also present a short example illustrating how INSPIRER generates music.

Experimental study of a similarity metric for retrieving pieces from structured plan cases: its role in the originality of plan case solutions

Macedo, Luís; Pereira, Francisco C.; Grilo, Carlos Fernando Almeida; Cardoso, Fernando Amílcar Bandeira
Fonte: Springer Publicador: Springer
Tipo: Conferência ou Objeto de Conferência
Publicado em /07/1996 ENG
Relevância na Pesquisa
36.07%
This paper describes a quantitative similarity metric and its contribution to achieve original plan solutions. This similarity metric is used by an iterative process of piece retrieval from structured plan cases. Within our approach plan cases are tree-like networks of pieces (goals and actions). These case pieces are ill-related each other by links (explanations). These links may be classified as hierarchical or temporal, antecedent or consequent, and explicit or implicit. Besides links, each case piece has also information about its properties (the attributes-value pairs), its hierarchical and temporal position in the case (the address), and about its constraints in the relationship with others (the constraints). The similarity metric computes a similarity value between two case pieces taking into account similarities between these case piece’s information types. Each time a problem is proposed, different weights are given to some of those similarities, with the aim of solving it with an original solution. This similarity metric is used by the system INSPIRER (ImagiNation taking as Source Past and Imperfectly REalated Reasonings). We illustrate the role of the similarity metric in the creativity of solutions, focusing specially their originality...

Small bowel perforation by a piece of china with a synchronous asymptomatic sigmoid carcinoma: A case report

Nunes, Quentin M; Brousil, James J; Hotouras, Alex; Zaitoun, Abed M; Shehata, Magdi
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em 30/09/2008 EN
Relevância na Pesquisa
35.98%
A 75 year old gentleman who presented with an incarcerated paraumibilical hernia was found intraoperatively to have small bowel perforation due to a piece of china with a synchronous asymptomatic sigmoid carcinoma.

Robot-Assisted Radical Prostatectomy in a Patient with a Preexisting Three-Piece Inflatable Penile Prosthesis

Choi, Kyung Hwa; Lee, Seung Hwan; Jung, Won Sug; Chung, Byung Ha
Fonte: The Korean Urological Association Publicador: The Korean Urological Association
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36.02%
We report a rare case of robot-assisted laparoscopic radical prostatectomy (RARP) in a patient with a preexisting penile prosthesis. In this case, we completed RARP without removing the reservoir by using a deflation-inflation technique, and there were no complications related to the prosthesis. The patient had a negative surgical margin. The preserved three-piece inflatable penile prosthesis continued to function properly in 1 month. Reservoir-preserving RARP is technically feasible and safe. However, it is important to be aware of device-related complications. Long-term studies on the mechanical survival rate and patient satisfaction should be also performed.

An Unnoticed Broken Sheathed Metallic Stylet in an Endotracheal Tube: A case report

Sharma, Pradeep K; Khan, Rashid M; Kaul, Naresh
Fonte: Sultan Qaboos University Medical Journal, College of Medicine & Health Sciences Publicador: Sultan Qaboos University Medical Journal, College of Medicine & Health Sciences
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
35.98%
We report a 58-years old patient, who underwent surgery for a fracture to the neck of the femur. Tracheal intubation was performed with the aid of a stylet; however, 15 minutes later, it was brought to the notice of the attending anesthesiologist that a broken piece of stylet had been left inside the lumen of the endotracheal tube. Prior to this, there was no evidence of a foreign body in the endotracheal tube or tracheobronchial tree. The broken piece of stylet was successfully retrieved with the help of a Kocher’s forceps.

What if the Hand Piece Spring Disassembles During Robotic Radical Prostatectomy?

Akbulut, Ziya; Canda, Abdullah Erdem; Atmaca, Ali Fuat; Asil, Erem; Isgoren, Egemen; Balbay, Mevlana Derya
Fonte: Society of Laparoendoscopic Surgeons Publicador: Society of Laparoendoscopic Surgeons
Tipo: Artigo de Revista Científica
Publicado em //2011 EN
Relevância na Pesquisa
35.9%
These authors report on the successful management of a disassembled hand piece spring during robotic radical prostatectomy.

Oromaxillary Prosthetic Rehabilitation of a Maxillectomy Patient Using a Magnet Retained Two-Piece Hollow Bulb Definitive Obturator; A Clinical Report

Mohamed Usman, Jafar Abdulla; Ayappan, Anuroopa; Ganapathy, Dhanraj; Nasir, Nilofer Nisha
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
35.9%
Resection of a malignant lesion involving the maxilla produces severe oromaxillary defect that can seriously jeopardize the normal phonetics of the patient. These defects are effectively managed by well-designed and fabricated obturator. This paper discusses the oromaxillary prosthetic rehabilitation of a maxillectomy patient using a magnet retained two-piece hollow bulb definitive obturator.

A Direct Investment Method of Closed Two-Piece Hollow Bulb Obturator

Deogade, Suryakant C.; Mantri, Sneha S.; Naitam, Dinesh; Dube, Gunjan; Gupta, Pushkar; Dewangan, Ashish
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36%
Maxillary defects occur due to surgical treatment of benign and malignant tumors, congenital malformation, and trauma. Prosthetic rehabilitation in such patients is influenced by the size and location of the defect. The most common of all intraoral defects are seen in the maxilla, in the form of an opening into the maxillary sinus and nasopharynx. These defects create disabilities in speech, deglutition, and mastication. The prosthesis which closes such an opening and recreates the functional separation of the oral cavity and sinus and nasal cavities is referred to as an obturator. Numerous techniques of hollow bulb fabrication have been mentioned in the literature from time to time. But there are only a few methods for bulb fabrication in two-piece obturator. This technique describes a direct investment method of waxed-up closed hollow bulb two-piece obturator.

Single piece artificial urinary sphincter for secondary incontinence following successful repair of post traumatic urethral injury

Kandpal, D. K.; Rawat, S. K.; Kanwar, S.; Baruha, A.; Chowdhary, S. K.
Fonte: Medknow Publications & Media Pvt Ltd Publicador: Medknow Publications & Media Pvt Ltd
Tipo: Artigo de Revista Científica
Publicado em //2013 EN
Relevância na Pesquisa
35.9%
Post traumatic urethral injury is uncommon in children. The management of this condition is dependent on the severity of injury. Initial suprapubic cystostomy with delayed repair is the conventional treatment. Successful reconstruction of urethral injury may be followed by urethral stricture, incontinence, impotence, and retrograde ejaculation. Successful repair of post traumatic urethral injury followed by secondary incontinence in children has not been well addressed in literature. We report the management of one such child, with satisfactory outcome with implantation of a new model of single piece artificial urinary sphincter in the bulbar urethra by perineal approach.

One-piece implant in reduced edentulous space closure: A report of two cases

Christopher, Sunil Dutt; Savitha, A N
Fonte: Medknow Publications & Media Pvt Ltd Publicador: Medknow Publications & Media Pvt Ltd
Tipo: Artigo de Revista Científica
Publicado em //2013 EN
Relevância na Pesquisa
35.98%
Dental Implants have gained popularity over the years and are increasingly becoming the choice of treatment. Different clinical situations are often encountered where modifications have to be considered in order to achieve successful rehabilitation. One of the challenges faced includes non-availability of sufficient space for conventional implants. Here, we present 2 case reports of patients with over two year follow up using one piece implant.

Autoinflation Leading to Failure of Two-Piece Ambicor Implantable Penile Prosthesis: An Outcome from a Methodical Treatment of Recalcitrant Stuttering Priapism

Welliver, R. Charles; Fonseca, Adam N.; West, Bradford L.; McVary, Kevin T.; Köhler, Tobias S.
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36.08%
Introduction. We present the case of a patient who received a two-piece Ambicor penile prosthesis for idiopathic recurrent “stuttering” priapism refractory to other treatment options. The patient returned unable to deflate the device due to an interesting anatomically induced mechanical failure. Aims. To describe the method and findings of this inflatable prosthesis failure. Results. Prosthesis failure occurred due to restrictive corporal diameter and the unique characteristics of fluid reservoir location in the two-piece inflatable prosthesis. The patient was successfully converted to a semirigid prosthesis with resolution of the pain that was due to his prosthesis autoinflation. Conclusion. Stuttering priapism remains a challenging clinical problem. Penile implantation is a reasonable long-term solution in a patient refractory to less invasive options. In patients with fibrotic corpora, a malleable device should be considered (at least temporarily) if unable to dilate comfortably to 13 mm.

Migration of Rod into Retroperitoneal Region: A Case Report and Review of the Literature

Bayri, Yaşar; Eksi, Murat Sakir; Doğrul, Ramazan; Koç, Demet Yalçinkaya; Konya, Deniz
Fonte: The Korean Spinal Neurosurgery Society Publicador: The Korean Spinal Neurosurgery Society
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
35.98%
Spinal stabilization with fusion is the widely used method for traumatic or pathologic fracture of spine, spinal stenosis, and spondylolisthesis. Complications may emerge during or after the operations. Infection, hematoma and neurological deficits are early noticed findings. Screw and/or rod fractures present in long-term after surgery. Rod migration in out of the spinal column is a rare entity. A 67-year-old woman was visited our clinic for right leg pain. She had a previous spinal instrumentation surgery for spondylolisthesis in another center 6 years before. After radiological work-up, a distally migrated rod piece was observed in the retroperitoneal portion. The patient was operated for degenerative change; old instruments were replaced and extended to the L2 level with posterior spinal fusion. After the operation, her right leg pain improved. The asymptomatic migrated rod piece has regularly been followed clinically and radiologically, since then. Although it has rarely been reported, migration of the instrumentation material should be kept in mind. Spinal fixation without fusion makes the mechanical system vulnerable to motion effects of spine, especially in a degenerative and osteoporotic background. Long-term, even life-long follow-up is necessary for late term complications.

A Piece of Broken Metal from Intubation Stylet Retained in Tracheobronchial Tree: A Case Report

Fathi, Mohammad; Farzanegan, Behrooz; Mojtabaee, Meysam; Nikzamir, Abdolrahim
Fonte: National Research Institute of Tuberculosis and Lung Disease Publicador: National Research Institute of Tuberculosis and Lung Disease
Tipo: Artigo de Revista Científica
Publicado em //2014 EN
Relevância na Pesquisa
36.02%
Intubation stylets are still being used in many medical centers for difficult intubations. Although very rare, it may break inside the trachea during endotracheal intubation despite routine pre-assessments by anesthesiologists and may surprisingly move deep into the tracheobronchial tree. In this case report, we describe a rare complication after stylet or guide-wire intubation in a patient in whom, a broken piece of metal guide remained in his tracheobronchial tree for 3 days.

Application of the 2-piece orthodontic C-implant for provisional restoration with laser welded customized coping: a case report

Paek, Janghyun; Ahn, Hyo-Won; Jeong, Do-Min; Shim, Jeong-Seok; Kim, Seong-Hun; Chung, Kyu-Rhim
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em 25/03/2015 EN
Relevância na Pesquisa
36.14%
This article presents the application of laser welding technique to fabricate an orthodontic mini-implant provisional restoration in missing area after limited orthodontic treatment. A 15-year-old boy case is presented. Two-piece orthodontic C-implant was placed after regaining space for missing right mandibular central incisor. Due to angular deviation of implant, customized abutment was required. Ready-made head part was milled and lingual part of customized abutment was made with non-precious metal. Two parts then were laser welded (Master 1000, Elettrolaser Italy, Verona, Italy) and indirect lab composite (3 M ESPE Sinfony, St. Paul, MN, USA) was built up. The patient had successful result, confirmed by clinical and radiographic examinations. Before the patient is ready to get a permanent restoration later on, this provisional restoration will be used. This case shows that a two-piece orthodontic C-implant system can be used to maintain small edentulous space after orthodontic treatment.

Arthroscopic one-piece reshaping for symptomatic discoid medial meniscus with anomalous amalgamating into anterior cruciate ligament

Choi, Hyung Suk
Fonte: Medknow Publications & Media Pvt Ltd Publicador: Medknow Publications & Media Pvt Ltd
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
35.9%
Discoid shapes of lateral menisci are relatively common finding, whereas discoid medial menisci are less common. Discoid medial meniscus with associated anomalous variants has been reported. However, symptomatic complex tear of complete type discoid medial meniscus with anomalous blending with anterior cruciate ligament is an extremely rare pathology. A 35-year-old male was admitted to our hospital with left knee pain and loss of terminal extension for 2 years. On physical examination, the patient presented with clicking and restriction during the extension motion of the knee joint. Magnetic resonance imaging and arthroscopy indicated complex tear of complete discoid medial meniscus in association with anomalous connection between entire apical portion of discoid medial meniscus and tibial insertion portion of the anterior cruciate ligament. We obtained a successful outcome with arthroscopic resection and shaping in one-piece method using no. 11 scalpel blade.

Contests vs. Piece Rates in Product Market Competition

Pull, Kerstin; Stadler, Manfred
Fonte: Universität Tübingen Publicador: Universität Tübingen
Tipo: Aufsatz
EN
Relevância na Pesquisa
36%
We study product market competition between firm owners (principals) where workers (agents) decide on their efforts and, hence, on output levels. Two worker compensation schemes are compared: a piece rate compensation as a benchmark when workers’ output performance is verifiable, and a contest-based compensation scheme with variable, revenue-based prizes when it is only verifiable who the best performing worker is, i.e., only ’contest performance’ is verifiable.Without rivalry between firms, the two compensation schemes lead to the same results. In case of product market competition, however, contest-based compensation schemes lead to more employment, more production, and lower firm profits. The reduction in profits represents the cost of being only able to verify workers’ contest performance instead of output performance.

Experimental study of a similarity metric for retrieving pieces from structured plan cases: its role in the originality of plan case solutions

Macedo, Luís; Pereira, Francisco C.; Grilo, Carlos; Cardoso, Amílcar
Fonte: Springer Publicador: Springer
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
36.07%
This paper describes a quantitative similarity metric and its contribution to achieve original plan solutions. This similarity metric is used by an iterative process of piece retrieval from structured plan cases. Within our approach plan cases are tree-like networks of pieces (goals and actions). These case pieces are ill-related each other by links (explanations). These links may be classified as hierarchical or temporal, antecedent or consequent, and explicit or implicit. Besides links, each case piece has also information about its properties (the attributes-value pairs), its hierarchical and temporal position in the case (the address), and about its constraints in the relationship with others (the constraints). The similarity metric computes a similarity value between two case pieces taking into account similarities between these case piece's information types. Each time a problem is proposed, different weights are given to some of those similarities, with the aim of solving it with an original solution. This similarity metric is used by the system INSPIRER (ImagiNation taking as Source Past and Imperfectly REalated Reasonings). We illustrate the role of the similarity metric in the creativity of solutions, focusing specially their originality...

Plans as structured networks of hierarchically and temporally related case pieces

Macedo, Luís; Pereira, Francisco C.; Grilo, Carlos Fernando Almeida; Cardoso, Fernando Amílcar Bandeira
Fonte: Springer Publicador: Springer
Tipo: Conferência ou Objeto de Conferência
Publicado em //1996 ENG
Relevância na Pesquisa
56.27%
This paper describes a representation of plan cases as a structured set of goals and actions. These goals and actions are the unit pieces that form a case. These case pieces are related each other by hierarchical and temporal links (explanations) forming a tree-like network. We give importance not just to explicit links, i.e., links between case pieces which are concretely known, but also to implicit ones, i.e., possibly unknown links between case pieces. Each case piece is explained by antecedent links and explains other case pieces by consequent links. The retrieval of a case piece is mainly guided by its links and by its surrounding case pieces. Our concept of case piece usefulness is briefly explained. We discuss the benefit of reusing and directly accessing small case pieces from multiple cases for improving the Case-Based Reasoning (CBR) systems’ capability and efficiency to solve problems. We explain the importance of stepwise refinement in plan cases and also the role that temporal representation can take in the meaningful and coherent construction of planning problem solutions. An application in musical composition domain is presented. We also show how a musical composition task can be treated as a planning task.