Heavy metals are considered to be one of the major contaminants of water in recent years due to their non-biodegradable property; hence making them toxic and bioaccumulate to living organisms. Conventional methods such us chemical precipitation, physical treatment through ion exchange are used for removing heavy metal ions from water. These methods are expensive and attributed to incomplete metals removal and high cost of treatment. In recent years, researchers have found alternative low cost and effective method for removal of toxic metals through biosorption process using biological materials. Moringa oleifera seeds is one of the biological materials which has effective adsorption capacity for removal of heavy metals from water and wastewater. In this article, the seeds of Moringa oleifera seeds as a low-cost biosorbent for removal of heavy metals is presented. Moringa oleifera seeds is inexpensive material that contains amino acids. The amino acid is a major constituent of the functional groups that aids in greater ability of heavy metals removal through metal ion exchange or complexation, which is mainly affected by pH, biosorbent dosage, and contact time. Moringa oleifera seeds residues have a greater capacity to absorb heavy metals in a single solution compared to multi ion solution.

Marketing in tourism is a systematic adjustment of tourism company policy and political policy at the local, regional, national and international levels in order to meet the needs of tourists and make a profit. The purpose of the paper is to explain how direct marketing, especially as part of a marketing mix, can help facilitate the exchange process in the international and domestic tourism markets. The aim of studying marketing in tourism is to make this concept available in this activity in theoretical, methodological and application terms. Marketing in the tourism industry is in a phase of maturity and is becoming sophisticated, which leads to the fact that the entire industry increasingly accepts the basic principles of marketing: The concept of marketing; Marketing orientation; Meeting the wishes and needs of consumers; Market segmentation; Value ; Product life cycle and Marketing mix (the principle on which the essence of the work is based). Direct marketing activities are based on databases and interactive communication media. Databases enable the selection of the target market (customer), which is acted upon by selecting the appropriate advertising/sales medium. The most famous media of direct marketing are certainly catalogs, direct mail and telephone (telemarketing), while in practice many others are used such as: television, radio, Internet, mobile phones, print, inserts.

The problems of forest and land fires continue to overshadow in Riau Province and Pelalawan District including the contributors of fire spots of forest and land fires. The handling and control of forest and land fires run during this time tend to be incidental and focus on the aspect of fire suppression only. The extinguishing and controlling of forest and land fires fire has been undertaken by several agencies in the local government organization of Pelalawan District. While the relationship between the agencies is more information share and informational relationship and the deployment of resource assistance is limited to the capacity of each organization during the occurrence of forest and land fires only, not led to a collaborative multi-disciplinary working approach (inter-organizational collaborative network) in the area of local government. This research aims to Described the management situation of forest and land fires that took place in Pelalawan District, conducting analysis and academic studies on the practice of Network Inter-Organization by controlling forest and land fires (Karhutla) in Pelalawan District, and formulating model Inter-organizational network-based organizations that can be applied to regional government of Pelalawan District in every bureaucracy organizations. The study used a qualitative descriptive approach with reference to literature studies and interview reluct collection by (Agranoff i McGuire, 2003).

Rad se oslanja na Bowlby-jevu teoriju afektivnog vezivanja, u skladu sa pretpostavkom da kvalitet afektivne vezanosti u detinjstvu predviđa kasnije psihološko funkcionisanje osobe, te da samoubistvo, kao autodestruktivni čin, može biti posledica nesigurne vezanosti. Cilj ovog rada bio je utvrditi da li se pacijenti, koji su ispoljili suicidalno ponašanje, češće svrstavaju u neki od nesigurnih obrazaca vezanosti, u odnosu na zdrave ispitanike bez suicidalnih tendencija. Istraživanje je provedeno u Specijalnoj bolnici za psihijatriju u Sokocu, a uzorak je činilo 80 ispitanika muškog pola, svrstanih u dve grupe: grupu suicidalnih pacijenata (N1=40) i grupu zdravih, nesuicidalnih ispitanika (N=40). Kratkim, strukturiranim upitnikom napravljenim za potrebe ovog istraživanja, prikupljeni su podaci o subjektivnom doživljaju majke i oca. Ispitivanje porodične afektivne vezanosti provedeno je modifikovanim Brennanovim upitnikom, za procenjivanje porodične afektivne vezanosti (Stefanović-Stanojević, 2005). Za testiranje razlika između grupa korišćen je χ² test. Rezultati pokazuju da postoji statistički značajna razlika između ispitivanih grupa i to tako, da su se ispitanici iz grupe suicidalnih, značajno češće svrstavali u nesigurno-okupirani i nesigurno-plašljivi obrazac vezivanja (χ²(3)=23,928; p=0,000) i češće su odrastali uz prezaštićujuću, agresivnu ili majku sa psihičkim problemima (2(3)=28,976; p=0,000), dok razlike u odnosu na doživljaj oca nemaju statističku značajnost (2(2)=3,436; p=0,179).

Modern people have embraced plants as a source of useful bioactive compounds. As such, plants with medicinal properties have become essential components in human life. The purpose of this study was to investigate the phytochemical profile of the extract of Dioscorea steriscus tubers obtained from Zimbabwe. Phytochemicals were extracted from tubers of D. steriscus using aqueous acetone. UV-Visible Spectrophotometry, Fourier transform infrared (FTIR) spectrometry and highperformance liquid chromatography (HPLC) techniques were used to determine the phytochemical profile of the tuber extract. The yield of phytochemicals extracted from D. steriscus tubers was found to be 6.38 %. The presence of bioactive compounds possessing phenyl, organic hydroxyl, amine, carboxyl, carbonyl, acyl, alkyl and aromatic functional groups was confirmed using UVVisible and FTIR analysis. The presence of substantial amounts of vanillic acid and kaempferol in D. steriscus tubers was confirmed using HPLC analysis. In support of the ethnobotanical values of Dioscorea species, the study confirmed the presence of potent phytochemicals in the extract of D. steriscus tubers obtained from Zimbabwe.

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.

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.

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.

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.

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.