30 research outputs found
Інформаційна підготовка: стимули і перешкоди
(UA) У статті розглянуто еволюцію уявлень про предмет інформатики. Створено контекст, який дозволив визначити основну лінію для побудови і реалізації системи інформаційної підготовки майбутнього фахівця.(EN) In the article the evolution of pictures is considered of the article of informatics. A context which allowed to define a mainline for a construction and realization of the system of informative preparation of future specialist is created.
It is shown that the term "information culture of personality" associated with the result of training information. Also associated with the preparation of the information readily meet the challenges of the information class.
It was determined that a special place in the interpretation of the concept of "information culture" is informative outlook that views the human system to a world of information and man's place in it. The analysis of the merits of the preparation showed that it implies an extremely wide range of knowledge and skills to work with the information and means to facilitate this work, including bibliographic literacy, culture, reading, information literacy, computer literacy, Internet literacy, etc
Influence of test specimen fabrication method and cross-section configuration on tension–tension fatigue life of PMMA bone cement
Compressive fatigue properties of an acidic calcium phosphate cement—effect of phase composition
Can Bone Void Fillers Carry Load? : Behaviour of Calcium Phosphate Cements Under Different Loading Scenarios
Calcium phosphate cements (CPCs) are used as bone void fillers and as complements to hardware in fracture fixation. The aim of this thesis was to investigate the possibilities and limitations of the CPCs’ mechanical properties, and find out if these ceramic bone cements can carry application-specific loads, alone or as part of a construct. Recently developed experimental brushite and apatite cements were found to have a significantly higher strength in compression, tension and flexion compared to the commercially available CPCs chronOS™ Inject and Norian® SRS®. By using a high-resolution measurement technique the elastic moduli of the CPCs were determined and found to be at least twice as high compared to earlier measurements, and closer to cortical bone than trabecular bone. Using the same method, Poisson's ratio for pure CPCs was determined for the first time. A non-destructive porosity measurement method for wet brushite cements was developed, and subsequently used to study the porosity increase during in vitro degradation. The compressive strength of the experimental brushite cement was still higher than that of trabecular bone after 25 weeks of degradation, showing that the cement can carry high loads over a time span sufficiently long for a fracture to heal. This thesis also presents the first ever fatigue results for acidic CPCs, and confirms the importance of testing the materials under cyclic loading as the cements may fail at stress levels much lower than the material’s quasi-static compressive strength. A decrease in fatigue life was found for brushite cements containing higher amounts of monetite. Increasing porosity and testing in a physiological buffer solution (PBS), rather than air, also decreased the fatigue life. However, the experimental brushite cement had a high probability of surviving loads found in the spine when tested in PBS, which has previously never been accomplished for acidic CPCs. In conclusion, available brushite cements may be able to carry the load alone in scenarios where the cortical shell is intact, the loading is mainly compressive, and the expected maximum stress is below 10 MPa. Under such circumstances this CPC may be the preferred choice over less biocompatible and non-degradable materials
Building IDS rules by means of a honeypot
NORSK:
Dagens samfunn har blitt veldig avhengig av datasystemer for å være
produktive. Det er derfor viktig at disse systemene har en høy grad av
tilgjengelighet (oppetid). En faktor som har muligheten til å redusere
tilgjengeligheten er datanettverks angrep (CNA). (CNA defineres som
metoder hvis hensikt er å ødelegge, endre eller hindre informasjon i
datamaskiner, datanettverk eller nettverket i seg selv). Dessverre er det
en økning i antall angrep over internett fra år til år. Disse angrepene
inkluderer blant annet innbrudd, DoS, phishing, spam og ormer. Noen av
disse angrepene kan "ødelegge" et stort antall maskiner på kort tid. For
å redusere denne trusselen er det ønskelig å ha et system som har muligheten
til å se nye angrep og behandle disse. Denne masteroppgaven vil
fokusere på hvor gode IDS regler som kan bli generert automatisk basert
på informasjon hentet fra en enkel honeypot. Resultatene er basert på
data samlet inn av en nettverks IDS ved navn SNORT, en lav interaksjons
honeypot ved navn honeyd og en sårbarhets skanner ved navn Nessus.
Resultatene våres viser at honeyd logger tilstrekkelig informasjon til å
kunne generere funksjonable SNORT regler, men enkelte felter i reglene
er ikke mulig å finne basert på loggene.ENGELSK:
In today’s society people become more and more dependent on computer
systems. It is therefore vital that such systems are up and running
at all times. One factor that has the power to destroy the availability
is computer network attacks (CNA). (CNA are defined as "methods
aimed at destroying, altering or obstructing information in computers,
computer networks or the networks themselves"). Unfortunately, the Internet
show an increasing trend regarding the usage of malicious activities
such as intrusion attempts, denial-of-service attacks, phishing,
spamming and worms. Some automated attacks can compromise a large
number of computers in a short period of time. To try to minimize this
threat, it would be nice to have a security system which has the ability
to detect new attacks and react on them. This thesis focuses on seeing
how good IDS rules that can be generated automatically based on data
logged by a simple honypot. The results are based on data collected by
a network intrusion detection system named SNORT, a low-interaction
honeypot named honeyd and a vulnerability scanner named Nessus. Results
found in this thesis claim that honeyd logs sufficient information
to make functional SNORT rules out of, but some rule options are not
possible to determine
Ambulanssjuksköterskors erfarenheter av att pre-hospitalt vårda patienter vid medvetslöshet
Validerat; 20120613 (anonymous
Upplevelse av vårdpersonalens bemötande hos personer som lever med blodsmitta
Validerat; 20101217 (root