The conductometric study of ligand structure influence on the Pb(II) complexation with crown ethers in different solvents has been investigated. In this paper, the complexation reaction of macrocyclic ligand, 18-crown-6 (18C6), dibenzo-18-crown-6 (DB18C6), and Pb(II) cation was studied in different solvents: dichloromethane (DCM) and 1,2- dichloroethane (1,2-DCE). The effects of surfactant structure (Triton X-100 and Triton X-45) on the conductivity of the Pb(II) complex with 18-crown-6 and dibenzo-18-crown-6 ether have been investigated. The conductance data showed that the stoichiometry of the complexes in most cases is 1:1(ML). It is also demonstrated that the influence of crown ethers is deeply affected by the organic solvent used. In the solvents studied, the stability of the resulting complexes showed higher stability in dichloromethane comparing with 1,2- dichloroethane. Macrocyclic ligand 18-crown-6 showed more suitable for complexation of Pb(II) ions compared to dibenzo-18-crown-6. Adding a surfactant affected the higher absolute values of the conductivity of systems, but not the change in the stoichiometric ratio between a metal ion and macrocyclic ligand.

Nowadays is important to increase power efficiency in the heat production sector. Tubes with shaped internal surface are one of the possibilities to improve efficiency of heat exchangers. In the fact of this is actual to look on the improvements of the process of forming from the perspective of the tool construction. Presented article is focused on mechanical analysis of the rotating mandrel for cold forming of tubes with shaped internal surface. As a proposed material of the tool was selected heat-treated tool steel. Analyses were performed with selected configuration of the bearings. One bearing was configured as radial and second bearing was configured as radial-axial. A result shows stresses in the mandrel and deformation of the mandrel under a load of forming pressure. Obtained results have potential to enhance knowledge in the area of construction of the forming tools.

Development and implementation in mechanical engineering practice of integrated information systems for control of technological processes of manufacturing products is the main driver of economic growth of developed countries. The priority of modern engineering technology is to provide the specified operational characteristics of products in accordance with the accuracy parameters, set by designer and quality of surface layers in contrast to achieving the minimum technological cost with maximum performance for traditional approaches. Technological providing of the main operational characteristics of the product (bearing strength, wear resistance, fatigue strength, joint strength etc.) require a systematic approach, which consists in the investigation of real physical processes at submicroscopic, microscopic and macroscopic levels of research, and step- by-step tracking required parameters at all stages of the Product Life Cycle from the position of technological inheritability. It is proposed to use the method of LM-hardness to control the quality of the structure of the material from castings in the design of functionally-oriented processes. The magnitude of the technological damage of the product material serves as a criterion for optimization when choosing a variant of surface treatment of the casting. A method for providing experimental studies of castings of aluminium alloys has been developed. On the basis of the carried-out experimental researches the rational route of processing of surfaces of casting is chosen.

Many modern threaded joints especially in the oil and gas industry, must satisfy high requirements for steel mechanical properties of which they are made. To ensure efficient threading of such hard-to-machine materials (ultimate strength is more than 1250 MPa), it is necessary to use carbide cutting inserts with the negative rake angle at its corner. However, modern manufacturers of such inserts make them only with a zero value of the rake angle. This is due to the difficulty of profiling of the insert cutting edge. This article proposes the basics of such inserts automatic profiling which is based on the algorithm developed by the authors. It includes two corrective calculations of the insert cutting edge profile, namely: the radial displacement of the corner and the tangential displacement of the area forming the crest of the thread. As a result, the computer application with the input parameter of the rake angle and output parameter of the upgraded profile of the insert cutting edge is received.

“Cyber Crime in Pakistan; Detection and Punishment Mechanism” addresses improvement of public health and safety policies by focusing on enhancing knowledge about cybercrime, women victimization, the pattern of time spent on the internet, sexual harassment and cyber- bullying and the effect of socio- demographic factors on cybercrime. A quantitative, self-selected research study designed by the researcher and utilizing a voluntary, anonymous internet survey consisting of open and closed-ended questions targeted students attending large universities in Pakistan (N=400), based on Routine Activity Theory (RAT). The results were analyzed through SPSS via directing descriptive statistics, Cronbach’s alpha, and regression analysis to confirm the validity and internal consistency of data and verification of the hypotheses. Results depicted women represent the largest group impacted by cyber abuse. Single women, young adults, and employed students demonstrate increased rates of victimization. Frequent usage of social media may account for increased victimization for women. Time spent online and deficient knowledge of cyber protection measures are positively correlated with digital victimization. Respondents report on inadequate effective and affordable cyber protection and ineffective responses by agencies to cybercrime. Based on the results garnered, and supported by Public Policy Theory, Cybersecurity policies have been proposed to Pakistan’s government.

Marketing in tourism is a systematic Korupcija je jedan od najdestruktivnijih i najkompleksijih problema današnjice, a njene poslјedice negativno utiču na poslovanje preduzeća, političku stabilnost zemlјe i standard stanovništva. Na globalnom nivou korupcija predstavlјa značajnu barijeru u međunarodnoj trgovini. Ukupni troškovi prevara teško da će se objektivno sagledati, a posebno će biti teško izračunati indirektne štete koje prouzrokuju prevare. Neke prevare neće biti nikada otkrivene. Procjenjuje se da prosječno organizacije u svijetu gube 5% godišnjih prihoda radi prevara. Mala smanjivanja troškova zbog prevara mogu značajno da povećaju profit organizacije. Vlade mnogih država donijele su nacionalne programe borbe protiv korupcije. Implementiranje antikorupcionih programa u mnogome zavisi od razvijene svijesti i etičke kulture u preduzećima. Međunarodna organizacija za standardizaciju razvila je standard ISO 37001- Sistem menadžmenta za borbu protiv korupcije. Međunarodni standard omogućava organizacijama svih vrsta sprečavanje, otkrivanje i rješavanje korupcije usvajanjem politike protiv podmićivanja, imenovanjem osobe koja će nadgledati poštivanje mjera za podmićivanje, obukom, procjenom rizika i dubinskom analizom projekata i poslovnih saradnika, provođenjem financijskih i komercijalne kontrole, te uspostavljanje postupaka izvještavanja i istrage. Pružajući globalno priznat način za rješavanje destruktivnih kriminalnih radnji koje pretvaraju bilijon dolara prljavog novca svake godine, ISO 37001 direktno se bavi jednim od najrazornijih i najizazovnijih svjetskih problema i pokazuje predan pristup suzbijanju korupcije. U radu je predstavlјeno istraživanje nivo korupcije u Bosni i Hercegovini, koje je poređeno sa nivom korupcije u drugim zemlјama, kao i korelacija sa globalnim indeksom konurentnosti. Na kraju rada predstavlјena je metodologija za projektovanje i uvođenje sistema menadžmenta za borbu protiv korupcije u preduzeću. Rezultati istraživanja donose nove naučne činjenice i saznanja u borbi protiv korupcije i metodološki postupak za implementiranje sistema menadžmenta za borbu protiv korupcije u preduzeću.

This research aims to analyze and describe issues of bureaucracy reform of health services in Indonesia. By using the literary study, method is through the results of basic health research and the expected results in public service contained in the Grand Design of Bureaucracy Reform. The results of the research have been conducted indicating that the current bureaucracy reform in the field of health services conducted by Indonesia’s Government is not optimal. Because there are still many very difficult provinces get easy access to hospitals. From 34 provinces in Indonesia based on the results of basic health, research on 24 provinces are still very difficult to get easy access to hospitals, and the percentage is still above the national average. Where this condition widely perceived by communities who live or reside in rural areas. These Recombination given in this study are as follows: development of access services of equitable hospital, bureaucracy of Modern health, professionalism and work ethic as well as honest behavior in the management of health bureaucracy system. The application of information technology as a supporting good performance, health bureaucracy organization that has to be started from Low to Middle Community Health Centre (Puskesmas), Health Office and Health Department. Modern Health management should be encouraged towards the professionalism strengthening of good attitude-based work, and the presence of control of each system perpetrators so that misuse of authority can be avoided in order the acceleration of health vision objectives can be realized.

Крах комунизма деведесетих година прошлог века резултирао је ескалацијом национализма у Европи. Национализам је до данас остао једина политичка идеја о којој се суди на основу њених злоупотреба и појава као што су шовинизам или нацизам. Непра- вда је утолико већа што национализам, према свом изворном значењу, те негативне облике у које може прерасти, осуђује. Рат у бившој Југославији, сукоби у земљама некадашњег Совјетског Савеза, пораст тежњи за независношћу и унутар саме Европске уније и њених чланица (Велика Британија, Велс, Шкотска, Каталонија и др.) су примери какав може бити политички карактер национализма, и у ком смеру се може развијати у зависности од интереса политичке власти која га креира и њиме руководи.

Промјене окружења, нова тржишта и стратегије захтијевају стално унапре- ђивање система мјерења перформанси предузећа. Ефективно мјерење перфо- рманси је од кључне важности за успјешну имплементацију стратегије предузећа, његов развој и опстанак у савременој економији. Данас је нагласак на мјерењу свих области дјеловања предузећа, за шта је потребан широк обим финансијских и нефинансијских индикатора. Како савремено управљање организацијом подразумијева управљање њеним процесима, остварење циљева организације зависи од успјешности њених процеса. Успјешност процеса, односно способност процеса да испуне циљеве организације се мјери помоћу дефинисаних кључних идентификатора перформанси.

U radu je obrađen utjecaj suvremenih komunikacijskih tehnologija na online učenje studenata. Komunikacijske tehnologije su centar istraživanja, posebno njihov utjecaj u učenju na način koji se prethodno trudilo izbjeći. Predrasude koje su stajale uz spominjanje mogućnosti online učenja su maknute. Nakon provedenog lockdowna uslijed pandemije Covid-19 virusom, online učenje postaje spas za desetke tisuća studenata koji imaju mogućnost nastaviti sa obrazovanjem u trenutku kada se činilo da je cijeli svijet oko njih stao. Prilikom pisanja članka korišten je sistematski pristup radu tako što su proučene prednosti i nedostatci koje online učenje donosi u XXI stoljeću te da li omogućuje korak naprijed u sveukupnom obrazovanju od strane studenata i profesora. Obrazovanje predstavlja glavni temelj i ključ uspjeha pojedinca. Razvojem komunikacijskih tehnologija to je omogućeno i osobama koje žive dalje od velikih gradova. Preko softverskih platformi za komunikaciju i suradnju učenje je pojednostavljeno putem razgovora, video sastanaka te pohrane podataka na jedno mjesto.