Iskanje po katalogu digitalne knjižnice

Opis: V skripti Nekovinska gradiva bodo študenti spoznali ključne vidike pomena nekovinskih materialov v sodobnem inženirstvu. Ti materiali so danes v številnih panogah postali nepogrešljivi pri načrtovanju in izdelavi izdelkov, v nekaterih primerih pa že povsem nadomeščajo kovine in zlitine. Kombinacija njihovih edinstvenih lastnosti omogoča razvoj tehnološko naprednih rešitev, ki so hkrati energetsko učinkovite in prijazne do okolja. S študijskim gradivom Nekovinski materiali bodo študenti pridobili poglobljeno razumevanje o zgradbi, lastnostih in tehnologijah izdelave polimernih, keramičnih in kompozitnih materialov.
Ključne besede: nekovinski materiali, polimeri, keramika, kompoziti, zgradba, lastnosti
Objavljeno v DKUM: 10.06.2025; Ogledov: 0; Prenosov: 2
Celotno besedilo (17,25 MB)
Gradivo ima več datotek! Več...

Opis: Stagnation remains a persistent challenge in optimization with metaheuristic algorithms (MAs), often leading to premature convergence and inefficient use of the remaining evaluation budget. This study introduces , a novel meta-level strategy that externally monitors MAs to detect stagnation and adaptively partitions computational resources. When stagnation occurs, divides the optimization run into partitions, restarting the MA for each partition with function evaluations guided by solution history, enhancing efficiency without modifying the MA’s internal logic, unlike algorithm-specific stagnation controls. The experimental results on the CEC’24 benchmark suite, which includes 29 diverse test functions, and on a real-world Load Flow Analysis (LFA) optimization problem demonstrate that MsMA consistently enhances the performance of all tested algorithms. In particular, Self-Adapting Differential Evolution (jDE), Manta Ray Foraging Optimization (MRFO), and the Coral Reefs Optimization Algorithm (CRO) showed significant improvements when paired with MsMA. Although MRFO originally performed poorly on the CEC’24 suite, it achieved the best performance on the LFA problem when used with MsMA. Additionally, the combination of MsMA with Long-Term Memory Assistance (LTMA), a lookup-based approach that eliminates redundant evaluations, resulted in further performance gains and highlighted the potential of layered meta-strategies. This meta-level strategy pairing provides a versatile foundation for the development of stagnation-aware optimization techniques.
Ključne besede: optimization, metaheuristics, stagnation, meta-level strategy, algorithmic performance, duplicate solutions
Objavljeno v DKUM: 30.05.2025; Ogledov: 0; Prenosov: 3
Celotno besedilo (1,47 MB)

Opis: Chambers are associations of legal and natural persons engaged in profitable activity. By definition, they are a community governed by public law that is pursuing a similar activity, founded primarily to protect the interests of its members. In Slovenia, chambers are established to represent persons engaged in various business activities - from companies, sole traders, farmers, foresters, craftsmen, private detectives, veterinarians and similar. The chambers differ slightly from one another, and can essentially be divided into three groups, namely chambers of commerce, professional chambers and mixed-type chambers. The tasks of the chambers, their bodies and their duties, the criteria for membership as well as the termination, financing or acquisition of funds for operation and other important information are specified in their by-laws, the respective law or other legal act. In this article the entire system of chambers of the Republic of Slovenia is presented using the example of three randomly selected chambers that differ in terms of their functioning, the exercise of public powers or financing in general, with the Chamber of Veterinarians and the Detective Chamber being explained in more detail. We have selected these two chambers as we wanted to present one natural science and one social science chamber. In the comparison between the detective and veterinary chambers, we can therefore research and analyse many aspects that reflect the diversity and specificity of each professional field. One of the reasons, why we have chosen these two chambers is also the fact, that we as authors are or were active members of our two chosen chambers. The comparison makes it easier to understand how they work, as well as their similarities and differences. We found that not only the chambers we selected, but most chambers operate very similarly, perform similar tasks and have many of the same organs required for their functioning. This is probably due to the fact that all chambers in Slovenia have developed or started to develop according to the model of the first chamber– the Chamber of Commerce and Industry of Slovenia.
Ključne besede: chambers, Veterinary chamber, Detective chamber
Objavljeno v DKUM: 21.05.2025; Ogledov: 0; Prenosov: 1
Povezava na datoteko

Opis: This paper defines blind spots in continuous optimization problems as global optima that are inherently difficult to locate due to deceptive, misleading, or barren regions in the fitness landscape. Such regions can mislead the search process, trap metaheuristic algorithms (MAs) in local optima, or hide global optima in isolated regions, making effective exploration particularly challenging. To address the issue of premature convergence caused by blind spots, we propose LTMA+ (Long-Term Memory Assistance Plus), a novel meta-approach that enhances the search capabilities of MAs. LTMA+ extends the original Long-Term Memory Assistance (LTMA) by introducing strategies for handling duplicate evaluations, shifting the search away from over-exploited regions and dynamically toward unexplored areas and thereby improving global search efficiency and robustness. We introduce the Blind Spot benchmark, a specialized test suite designed to expose weaknesses in exploration by embedding global optima within deceptive fitness landscapes. To validate LTMA+, we benchmark it against a diverse set of MAs selected from the EARS framework, chosen for their different exploration mechanisms and relevance to continuous optimization problems. The tested MAs include ABC, LSHADE, jDElscop, and the more recent GAOA and MRFO. The experimental results show that LTMA+ improves the success rates for all the tested MAs on the Blind Spot benchmark statistically significantly, enhances solution accuracy, and accelerates convergence to the global optima compared to standard MAs with and without LTMA. Furthermore, evaluations on standard benchmarks without blind spots, such as CEC’15 and the soil model problem, confirm that LTMA+ maintains strong optimization performance without introducing significant computational overhead.
Ključne besede: optimization, metaheuristics algorithm, algorithmic performance, duplicate solutions, nonrevisited solutions, blind spots, LTMA
Objavljeno v DKUM: 19.05.2025; Ogledov: 0; Prenosov: 2
Celotno besedilo (4,16 MB)

Opis: Predmetno magistrsko delo v kontekstu kibernetskega kriminala obravnava problematiko varstva pravice do zasebnosti v okviru prikritih preiskovalnih ukrepov pridobivanja komunikacijskih in uporabniških podatkov telekomunikacijskih storitev. Zaradi samega načina delovanja sodobne družbe v smislu globoke prepletenosti z informacijsko tehnologijo, je tako tudi samoumevno, da se zaradi vse večje povezanosti sveta, kot tudi uporabe informacijskih tehnologij oz. storitev, povečuje pojavnost kibernetskega kriminala. Za pregon slednjega morajo organi pregona imeti na razpolago ustrezne mehanizme tako v tehničnem smislu, torej tehnično znanje in tehnično opremo za pregon tovrstne specifične oblike kriminala, kot tudi zakonske rešitve v smislu nabora ukrepov, ki jim sploh omogočajo učinkovit pregon kibernetskega kriminala. Tovrstni zakonski mehanizem za učinkovit pregon kibernetskega kriminala med drugim predstavljajo prikriti preiskovalni ukrepi pridobivanja prometnih in uporabniških podatkov telekomunikacijskih storitev. Omenjeni ukrepi že zaradi same narave predstavljajo znaten poseg v človekove pravice in svoboščine tistih, zoper katere so odrejeni, predvsem pa v pravico do zasebnosti. Omogočajo namreč pridobivanje širokega nabora podatkov, ki organom pregona dopuščajo intenziven in dodelan vpogled v zasebno življenje posameznikov. Zaradi navedenega je potrebno pravici do zasebnosti v okviru tovrstnih ukrepov nameniti posebno pozornost, za kar je potrebno tudi poznavanja geneze razvoja ukrepov pridobivanja prometnih in uporabniških podatkov telekomunikacijskih storitev. Ta pokaže, da je znaten vpliv na razvoj imela tako sodna praksa Evropskega sodišča za človekove pravice kot tudi Ustavnega sodišča Republike Slovenije. Sodna praksa se na družbene spremembe odziva hitreje kot zakonodajalec. V sedanji slovenski kazensko procesno pravni ureditvi je pravica do zasebnosti ustrezno varovana, saj je zakonodajalec ob zakonskih spremembah ukrepov pridobivanja prometnih in uporabniških podatkov telekomunikacijskih storitev sledil sodni praksi in z vsebinskimi omejitvami znatno zvišal raven varstva pravice do zasebnosti. Ob tem pa je za varstvo pravice do zasebnosti pomembno tudi to, da ima nacionalna kazensko procesna pravna ureditev vzpostavljene tudi ustrezne mehanizme varovalk, ki bi naj preprečevale oz. sanirale kršitve človekovih pravic in svoboščin ter dokaznih prepovedi. Primarno vlogo v tovrstnem sankcioniranju kršitev igra ekskluzija dokazov, ki pa je v slovenski kazensko procesno pravni ureditvi relativno stroga, saj naše kazensko procesno pravo ekskluzijo ureja v absolutni obliki, ki načeloma ne dopušča nobenih ekskluzijskih izjem, razen v primeru, ko gre za horizontalna razmerja.
Ključne besede: kibernetski kriminal, pravica do zasebnosti, komunikacijska zasebnost, prikriti preiskovalni ukrepi, sodobne tehnologije, pregon storilcev kaznivih dejanj, ekskluzija dokazov
Objavljeno v DKUM: 19.05.2025; Ogledov: 0; Prenosov: 7
Celotno besedilo (1,00 MB)