1 online zdroj
- MeSH
- Data Mining MeSH
- Data Collection methods MeSH
- Information Storage and Retrieval * MeSH
- Publication type
- Dataset MeSH
- Periodical MeSH
- Conspectus
- Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce
- NML Fields
- věda a výzkum
1 online zdroj
This article addresses the topic of extracting logical rules from data by means of artificial neural networks. The approach based on piecewise linear neural networks is revisited, which has already been used for the extraction of Boolean rules in the past, and it is shown that this approach can be important also for the extraction of fuzzy rules. Two important theoretical properties of piecewise-linear neural networks are proved, allowing an elaboration of the basic ideas of the approach into several variants of an algorithm for the extraction of Boolean rules. That algorithm has already been used in two real-world applications. Finally, a connection to the extraction of rules of the Łukasiewicz logic is established, relying on recent results about rational McNaughton functions. Based on one of the constructive proofs of the McNaughton theorem, an algorithm is formulated that in principle allows extracting a particular kind of formulas of the Łukasiewicz predicate logic from piecewise-linear neural networks trained with rational data.
- MeSH
- Algorithms MeSH
- Ecology MeSH
- Financing, Organized MeSH
- Fuzzy Logic MeSH
- Data Interpretation, Statistical MeSH
- Humans MeSH
- Linear Models MeSH
- Neural Networks, Computer MeSH
- Pattern Recognition, Automated methods MeSH
- Artificial Intelligence MeSH
- Animals MeSH
- Check Tag
- Humans MeSH
- Animals MeSH
- Publication type
- Comparative Study MeSH
- MeSH
- Data Management * methods standards organization & administration MeSH
- Diagnostic Imaging history methods instrumentation MeSH
- Medical Informatics * MeSH
- International Classification of Diseases MeSH
- Risk MeSH
- Information Storage and Retrieval history methods standards statistics & numerical data MeSH
- Artificial Intelligence MeSH
The article deals with some basic approaches to the management of secured access to data on external storage devices in real time. Basic steps of effective, safe and easy-to-use handling of personal and/or confidential data are described. Further, a method to protect logins and passwords during their registration into the various applications is presented in the article. Main features of several most commonly used software products are also described considering data protection when used online and stored on various storage devices. The main reasons to apply data protection in the area of medicine and health care services are stated in this article as well.
Cíle: Zpracování souboru konsekutivních pacientů podstupujících extrakci implantabilního elektronického kardiologického přístroje z jakékoliv indikace. Posouzení základních demografických dat, úspěšnosti extrakce, počtu komplikací a mortality v čase, určení prediktorů mortality. Metodologie: Do souboru byli zařazeni prospektivně všichni pacienti, u kterých byla provedena extrakce přístroje či elektrod v letech 2017-2020. Základními sledovanými parametry byly demografické údaje, stáří přístroje, typ přístroje, metoda extrakce a jednoměsíční a jednoroční mortalita, zjišťovaná telefonickým průzkumem. Výsledky: Celkem bylo zařazeno 172 pacientů, 59,3 % indikací k extrakci bylo z důvodu infekce systému. Úspěšnost extrakce (plná klinická i radiologická) dosáhla 92 %, jednoměsíční mortalita 6,4 %, jednoroční 14,5 %. Průměrné stáří zavedených systémů bylo 7,4 roku. Závěr: Perkutánní extrakce elektrod je etablovanou metodou, dosahující v našich podmínkách bezpečnosti i účinnosti srovnatelné s velkými evropskými centry. Nutnou podmínkou bezpečného provádění extrakcí je urgentní dostupnost kardiochirurga a dostatečný počet výkonů, zajišťující adekvátní trénink personálu.
Aims: Objective of this study is to register data and trends in population of patients indicated for lead extraction or complete system removal. Basic demographic data, extraction success rate as well as complications, mortality, and its predictors were collected. Methodology: Prospectively collected consequent patients indicated to lead extraction or system removal from our centre were included. Data regarding demography, device age, device type, extraction method and one month and one year mortality were collected. Outcomes: 172 patients were enrolled between years 2017-2020. 59.3% patients were indicated because of cardiac system infection. Success rate (full clinical and radiological) reached 92%, one month mortality 6.4%, one year mortality 14.5%. Explanted systems were 7.4 years old in average. Conclusion: Percutaneous lead extraction is an established method, which is in our conditions safe and effective as in large European centres. Urgent cardiac surgery availability as well as adequate number of performed procedures are necessary safety precautions.
- Keywords
- endokarditida spojená s implantabilním přístrojem, extrakce elektrod, laserová extrakce,
- MeSH
- Defibrillators, Implantable * adverse effects MeSH
- Endocarditis etiology MeSH
- Pacemaker, Artificial * adverse effects MeSH
- Humans MeSH
- Device Removal * methods mortality MeSH
- Retrospective Studies MeSH
- Check Tag
- Humans MeSH
OBJECTIVES: This study aims to describe the data structure and harmonisation process, explore data quality and define characteristics, treatment, and outcomes of patients across six federated antineutrophil cytoplasmic antibody-associated vasculitis (AAV) registries. METHODS: Through creation of the vasculitis-specific Findable, Accessible, Interoperable, Reusable, VASCulitis ontology, we harmonised the registries and enabled semantic interoperability. We assessed data quality across the domains of uniqueness, consistency, completeness and correctness. Aggregated data were retrieved using the semantic query language SPARQL Protocol and Resource Description Framework Query Language (SPARQL) and outcome rates were assessed through random effects meta-analysis. RESULTS: A total of 5282 cases of AAV were identified. Uniqueness and data-type consistency were 100% across all assessed variables. Completeness and correctness varied from 49%-100% to 60%-100%, respectively. There were 2754 (52.1%) cases classified as granulomatosis with polyangiitis (GPA), 1580 (29.9%) as microscopic polyangiitis and 937 (17.7%) as eosinophilic GPA. The pattern of organ involvement included: lung in 3281 (65.1%), ear-nose-throat in 2860 (56.7%) and kidney in 2534 (50.2%). Intravenous cyclophosphamide was used as remission induction therapy in 982 (50.7%), rituximab in 505 (17.7%) and pulsed intravenous glucocorticoid use was highly variable (11%-91%). Overall mortality and incidence rates of end-stage kidney disease were 28.8 (95% CI 19.7 to 42.2) and 24.8 (95% CI 19.7 to 31.1) per 1000 patient-years, respectively. CONCLUSIONS: In the largest reported AAV cohort-study, we federated patient registries using semantic web technologies and highlighted concerns about data quality. The comparison of patient characteristics, treatment and outcomes was hampered by heterogeneous recruitment settings.
- MeSH
- Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis * drug therapy epidemiology complications MeSH
- Granulomatosis with Polyangiitis * drug therapy epidemiology complications MeSH
- Humans MeSH
- Microscopic Polyangiitis * drug therapy epidemiology MeSH
- Antibodies, Antineutrophil Cytoplasmic MeSH
- Registries MeSH
- Data Accuracy MeSH
- Information Storage and Retrieval MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Meta-Analysis MeSH
