44 research outputs found
Allelopathic effect of plant species Aloe vera (L.) Burm. f. on weed species scentless mayweed and redroot pigweed
Cilj rada bio je utvrditi alelopatski utjecaj vodenih ekstrakata od vrste Aloe vera (L.) Burm.f. na klijavost i rast korovnih vrsta bezmirisna kamilica (Tripleurospermum inodorum (L.) C.H. Schultz) i oÅ”trodlakavi Å”Äir (Amaranthus retroflexus L.). Pokus je proveden u laboratorijskim uvjetima u Petrijevim zdjelicama, a istraženi su ekstrakti od svježe mase lista u koncentracijama od 2, 4, 6, 8, i 10%. Rezultati su pokazali da vodeni ekstrakti nemaju znaÄajan alelopatski utjecaj na klijavost i rast klijanaca bezmirisne kamilice. Vodeni ekstrakti nisu imali znaÄajan utjecaj na klijavost, duljinu korijena i suhu masu oÅ”trodlakavog Å”Äira, dok su duljina izdanka i svježa masa klijanaca bile stimulirane, posebice pri viÅ”im koncentracijama ekstraktaThe aim of the study was to determine the allelopathic effects of water extracts from Aloe vera (L.) Burm.f. on germination and growth of weed species scentless mayweed (Tripleurospermum inodorum (L.) C.H. Schultz) and redroot pigweed (Amaranthus retroflexus L.). The experiment was carried out in laboratory conditions in Petri dishes, and water extracts from fresh leaves were analysed at concentrations of 2, 4, 6, 8 and 10%. The results showed that water extracts had no significant allelopathic effect on germination and growth of scentless mayweed seedlings. Water extracts showed no significant effect on germination, root length and dry weight of redroot pigweed, while the shoot length and fresh seedling weight were stimulated, especially at higher concentrations of the extract
British educational systems: A comparative overview
U ovome radu smo se posvetili prouÄavanju britanskog modela obrazovnog sustava kako bi u njemu pronaÅ”li razliÄitosti u odnosu na hrvatski obrazovni sustav. Metodom komparacije smo istakli razliÄitosti unutar samog britanskog sustava, koji se sastoji od Äetiri obrazovna podsustava: engleskog, Å”kotskog, velÅ”kog i sjevernoirskog. Nakon Å”to smo uvidjeli nedostatke i prednosti svakog britanskog podsustava, komparirali smo britanski obrazovni sustav kao cjelinu s hrvatskim obrazovnim sustavom. Spoznali smo da se britanski i hrvatski obrazovni sustavi razlikuju u mnogo aspekata. Samo je visoko obrazovanje jednako ureÄeno zbog primjene Bolonjskog procesa. Najvažnija prednost britanskog obrazovnog sustava naspram hrvatskog je njegova fleksibilnost. U Velikoj Britaniji uÄenici u nekoliko faza tijekom Å”kolovanja imaju priliku promijeniti svoj tijek obrazovanja, dok je u Hrvatskoj taj sustav priliÄno nefleksibilan, posebice nakon upisa u srednju Å”kolu.In this work we have studied the British educational model in order to find
differences to the Croatian educational model. With the method of comparison we have
underlined the differences within the British system, which consists of four educational
subsystems: English, Scottish, Welsh and Northern Irish. After we have seen the flaws and the
advantages of each British subsystem, we compared the British educational system as a whole
with the Croatian educational system. We realized that the British and the Croatian
educational systems differ in many aspects. Higher education is the only area that is similar
in both systems, due to the Bologna Process being implemented by both countries. The
essential advantage of the British educational system is its flexibility. In Great Britain
students have several phases during their education in which they can change the outcome of
their further education, while in Croatia the system is really unflexible, especially after
enrolling in secondary school
Utjecaj naÄina Å”aržiranja obradaka na svojstva PACVD prevlaka
U teorijskome dijelu rada opisan je CVD postupak kemijskoga prevlaÄenja iz parne
faze (engl. Chemical Vapour Deposition), njegove fizikalno-kemijske osnove, podjela,
prednosti i nedostaci te primjena. Detaljno je opisan PACVD postupak s posebnim osvrtom na
utjecaj energije iona (plazme), položaja i geometrije uzorka u reaktoru PACVD ureÄaja na
kvalitetu prevlake.
U eksperimentalnome dijelu, uz navedene parametre prevlaÄenja TiN prevlake i
sastava osnovnog materijala (X38CrMoV5ā3), prikazane su metode i detaljno analizirani
rezultati ispitivanja kvalitete prionjivosti prevlake Rockwell C testom, debljine prevlake
kalotestom i kemijskoga sastava TiN prevlake GDOES testom. Dobiveni rezultati ukazuju na
znaÄajan utjecaj naÄina Å”aržiranja obratka na kvalitetu prevlake i njenu debljinu
Allelopathic effect of plant species Aloe vera (L.) Burm. f. on weed species scentless mayweed and redroot pigweed
Cilj rada bio je utvrditi alelopatski utjecaj vodenih ekstrakata od vrste Aloe vera (L.) Burm.f. na klijavost i rast korovnih vrsta bezmirisna kamilica (Tripleurospermum inodorum (L.) C.H. Schultz) i oÅ”trodlakavi Å”Äir (Amaranthus retroflexus L.). Pokus je proveden u laboratorijskim uvjetima u Petrijevim zdjelicama, a istraženi su ekstrakti od svježe mase lista u koncentracijama od 2, 4, 6, 8, i 10%. Rezultati su pokazali da vodeni ekstrakti nemaju znaÄajan alelopatski utjecaj na klijavost i rast klijanaca bezmirisne kamilice. Vodeni ekstrakti nisu imali znaÄajan utjecaj na klijavost, duljinu korijena i suhu masu oÅ”trodlakavog Å”Äira, dok su duljina izdanka i svježa masa klijanaca bile stimulirane, posebice pri viÅ”im koncentracijama ekstraktaThe aim of the study was to determine the allelopathic effects of water extracts from Aloe vera (L.) Burm.f. on germination and growth of weed species scentless mayweed (Tripleurospermum inodorum (L.) C.H. Schultz) and redroot pigweed (Amaranthus retroflexus L.). The experiment was carried out in laboratory conditions in Petri dishes, and water extracts from fresh leaves were analysed at concentrations of 2, 4, 6, 8 and 10%. The results showed that water extracts had no significant allelopathic effect on germination and growth of scentless mayweed seedlings. Water extracts showed no significant effect on germination, root length and dry weight of redroot pigweed, while the shoot length and fresh seedling weight were stimulated, especially at higher concentrations of the extract
KliniÄka slika pluÄne tuberkuloze na kraju drugog tisuÄljeÄa
Over the last 120 years, a great progress has been made in the diagnosis and treatment of pulmonary tuberculosis. In Western Europe, the incidence of pulmonary tuberculosis was 700/100,000 at the beginning, and 10-20/100,000 at the end of the 20th century. Changes in the epidemiological pattern entailed modifications in the clinical picture of pulmonary tuberculosis over the mentioned period of time, so that at the end of the century (and millennium) four forms of the disease could be defined: 1) active pulmonary tuberculosis in patients with post-tuberculosis sequels; 2) active pulmonary tuberculosis not associated with other diseases; 3) active pulmonary tuberculosis associated with chronic diseases; and 4) active pulmonary tuberculosis in immunocompromised patients. It is emphasized that an increase in the number of group 3 and 4 active pulmonary tuberculosis patients should be expected in the third millennium. The detection and management of these patients are difficult and complex. The detection of pulmonary tuberculosis is relatively late, while the treatment often fails and leads to development of resistant Mycobacterium tuberculosis strains. The existent problems encountered in the management of tuberculosis patients could be minimized by the use of DOTS program, recommended by the World Health Organization and also by the Ministry of Health of the Republic of Croatia.U posljednjih 120 godina uÄinjen je velik napredak u dijagnostici i lijeÄenju pluÄne tuberkuloze. Incidencija tuberkuloze u zapadnoj Europi na poÄetku bila je 700/100.000, a na kraju stoljeÄa 10-20/100.000. Promjenom epidemioloÅ”ke situacije kroz navedeno razdoblje mijenjala se i kliniÄka slika tuberkuloze, koja bi se na kraju stoljeÄa (tisuÄljeÄa) mogla definirati u Äetiri oblika: 1. aktivna pluÄna tuberkuloza u bolesnika s poslijetuberkuloznim posljedicama; 2. aktivna pluÄna tuberkuloza bez drugih popratnih bolesti; 3. aktivna pluÄna tuberkuloza s popratnim kroniÄnim bolestima; i 4. aktivna pluÄna tuberkuloza u imuno kompromitiranih bolesnika. IstiÄe se kako u treÄem tisuÄljeÄu treba oÄekivati porast bolesnika s aktivnom pluÄnom tuberkulozom treÄe i Äetvrte skupine. Napominje se kako je otkrivanje i lijeÄenje ovih bolesnika teÅ”ko i složeno. Tuberkuloza se otkriva relativno kasno, lijeÄenje je Äesto neuspjeÅ”no i brzo dovodi do razvoja rezistentnih sojeva Mycobacterium tuberculosis. Primjenom programa DOTS koji preporuÄa Svjetska zdravstvena organizacija i Ministarstvo zdravstva Republike Hrvatske postojeÄi bi se problemi u zbrinjavanju tuberkuloznih bolesnika mogli svesti na najmanju moguÄu mjeru
Challenges in geotagging encyclopaedias
Enciklopedije se, kao pouzdani izvori znanja koje izraÄuju struÄnjaci predmetnoga podruÄja i leksikografi, meÄu drugim karakteristikama, diÄe i svojom pouzdanoÅ”Äu, toÄnoÅ”Äu i preciznoÅ”Äu. Prostorni prikaz enciklopedijskoga znanja na odreÄeni se naÄin veÄ odavno koristi na geografskim i tematskim kartama, no digitalno doba donijelo je znatno proÅ”irene moguÄnosti. Ipak, u nedostatku osustavljenoga modela obilježavanja i prikaza (geotagiranja) enciklopedijskoga znanja, rijetka djela u punoj mjeri rabe takav pristup. Stvaranje takva modela donosi i neke izazove. Imena lokacija (gradova, ulica, trgova i sl.) kroz vrijeme se mogu mijenjati, Å”to je izazov u složenom pretraživanju ili prikazu na karti. U takvim se sluÄajevima traže rjeÅ”enja svoÄenja na zajedniÄku oznaku, Å”to je princip regularizacije (normalizacije) teksta. Istraživanje je potaknuto nastojanjem za unapreÄenjem mrežnoga izdanja Hrvatske tehniÄke enciklopedije Leksikografskoga zavoda Miroslav Krleža na Portalu hrvatske tehniÄke baÅ”tine. Autori analiziraju dosadaÅ”nju enciklopedijsku praksu bilježenja mjesnih imena koja su se kroz vrijeme mijenjala te razmatraju koji oblici bilježenja najbolje odgovaraju specifiÄnim, praktiÄnim zahtjevima digitalne enciklopedike. Takav bi naÄin bilježenja i prikaza poveÄao upotrebljivost enciklopedija, jer bi se uz nastavak prakse prikaza informacija koje su precizne, korisnicima omoguÄilo olakÅ”ano pretraživanje i pregledavanje te prikaz znanja na karti.Encyclopaedias, as a reliable source of knowledge produced by experts and lexicographers, are, among other characteristics, known for their reliability, accuracy, and precision. The spatial representation of encyclopedic knowledge has in a way been used for a long time, such as in thematic maps, but the digital age has brought significantly expanded possibilities. However, in the absence of an established model for marking and displaying (geotagging) encyclopedic knowledge, few works make full use of such an approach. Creating such a model has some challenges. Locations names (of cities, streets, squares, etc.) can change over time, which can be a challenge when trying to do a complex search or display information on a map. In such cases, solutions are sought to reduce information to a common label, which is the principle of text regularisation (normalisation). The research was prompted by efforts to improve the online edition of the Croatian Encyclopedia of Technology by the Miroslav Krleža Institute of Lexicography on the Croatian Technical Heritage Portal. The authors analyse the current encyclopedic practice of recording place names that have changed over time, and consider which forms of recording best suit the specific, practical requirements of digital encyclopedic projects of today. Such a way of marking and displaying would increase the usability of encyclopedias because, along with providing information that is accurate, it would enable users to easily search, browse, and look up knowledge on a map
Tables as a Means to Enhance the Structure of Encyclopedic Works
EnciklopediÄka djela Äine sintezu znanja podruÄja koje obraÄuju, nerijetko i ukupnih ljudskih dosega u vremenu u kojem nastaju. Važan dio njihova koncepta Äini strukturiranost sadržaja radi lakÅ”ega pronalaženja, razumijevanja i koriÅ”tenja željenom informacijom. Važan element te strukturiranosti mogu Äiniti unificirani tabliÄni prikazi podataka. Ovaj rad istražuje zastupljenost, naÄin organizacije i funkcionalnost tabliÄnih prikaza u nizu enciklopediÄkih djela, a osobito onih za koja je utvrÄeno da se koriste tabliÄnim prikazima kao elementima strukturiranosti. Istraživanje je provedeno na svjetskim enciklopediÄkim izdanjima (Encyclopaedia Britannica, Encyclopedia Americana, ChambersŹ¼s Encyclopaedia, World Book Encyclopedia, Brockhaus EnzyklopƤdie, La Grande EncyclopĆ©die, Wikipedija) te projektima hrvatske enciklopedike (Hrvatska enciklopedija, Proleksis enciklopedija i Hrvatska tehniÄka enciklopedija). Sadržajnom analizom enciklopediÄkih projekata utvrÄeni su zastupljenost i sadržaj tabliÄnih prikaza te razliÄitosti i sliÄnosti vrsta tih prikaza i njihova sadržaja. TakoÄer, analizirane su funkcionalnosti takva oblika strukturiranoga sadržaja u mrežnim izdanjima nekih projekata. Pokazalo se kako unificirani tabliÄni prikazi koji prate pojedine tipske Älanke najviÅ”e pridonose strukturiranosti enciklopediÄkih djela te otvaraju nove moguÄnosti za unutarnje i vanjsko povezivanje sadržaja, razvoja ontologija i sl. Evolucija tabliÄnih prikaza u enciklopediÄkim izdanjima, od pukih prikaza usustavljenih podataka u tradicionalnim (tiskanim) izdanjima do sastavnica elemenata strukture mrežnih izdanja, otvara nove moguÄnosti u razvoju enciklopedike i dovodi do promjena u pristupu izvedbi mrežnih enciklopediÄkih projekata.Encyclopedic works are a synthesis of knowledge of a certain field of interest, and often of the whole human achievement at the time in which they arise. As highly informative works of a tertiary type, an important part of their concept is content structure, the purpose of which is to make them easier to understand and use. This paper explores the extent of tables, their means of organization, and their functionality in encyclopedic works. This research was conducted on well-known traditional (printed) encyclopedic works, such as the Encyclopaedia Britannica, Encyclopedia Americana, Chambersās Encyclopaedia, World Book Encyclopedia, Brockhaus EnzyklopƤdie, La Grande EncyclopĆ©die, as well as Croatian encyclopedic works: Croatian Encyclopedia, Proleksis Encyclopedia, Croatian Encyclopedia of Technology. Content analysis was conducted on tables in encyclopedic projects as important components of the structure of relevant data, providing an overview of the extent of tables and their content in selected encyclopedic works. By comparing the results of the content analysis of multiple encyclopedic works, differences, and similarities in table types and their content are shown to indicate possibilities and requisites when compiling such highly structured content. Furthermore, insight is provided into the functionalities of such structured content in online editions of some of these encyclopedic works as well as of Wikipedia as the most commonly used online encyclopaedia. The aim of this paper is to present the evolution of tables in encyclopedic works, from the mere rendering of systematized data in traditional works to tables as elements of structure in online works that can be used to develop ontologies, this, in turn, generates new possibilities in the development of encyclopedic studies and a new approach to the creation of online encyclopedic works
A Bibliography of the TehniÄka enciklopedija (1963ā97)
Bibliografija obuhvaÄa sve Älanke objavljene u TehniÄkoj enciklopediji Leksikografskoga zavoda Miroslav Krleža koja je izlazila u razdoblju od 1963. do 1997. u 13 svezaka. Osim popisa Älanaka, bibliografija sadržava i imensko i strukovno kazalo.The bibliography encompasses all articles published in the 13-volume TehniÄka enciklopedija (Encyclopaedia of Technology) of the Miroslav Krleža Institute of Lexicography in the 1963ā1997 period. Apart from a list of articles, the bibliography also contains an index of personal names and an index of fields of science
The VLA-COSMOS 3 GHz Large Project: Star formation properties and radio luminosity functions of AGN with moderate-to-high radiative luminosities out to
We study a sample of 1,604 moderate-to-high radiative luminosity active
galactic nuclei (HLAGN) selected at 3 GHz within the VLA-COSMOS 3 GHz Large
Project. These were classified by combining multiple AGN diagnostics: X-ray
data, mid-infrared data and broad-band spectral energy distribution fitting. We
decompose the total radio 1.4 GHz luminosity () into
the emission originating from star formation and AGN activity by measuring the
excess in relative to the infrared-radio
correlation of star-forming galaxies. To quantify the excess, for each source
we calculate the AGN fraction (), the fractional contribution
of AGN activity to . The majority of the HLAGN,
, are dominated by star-forming processes (),
while are dominated by AGN-related radio emission
(). We use the AGN-related 1.4 GHz emission to derive the 1.4
GHz AGN luminosity functions of HLAGN. By assuming pure density and pure
luminosity evolution models we constrain their cosmic evolution out to
, finding and . These evolutionary laws show that
the number and luminosity density of HLAGN increased from higher redshifts
() up to a maximum in the redshift range , followed by a
decline towards local values. By scaling the 1.4 GHz AGN luminosity to kinetic
luminosity using the standard conversion, we estimate the kinetic luminosity
density as a function of redshift. We compare our result to the semi-analytic
models of radio mode feedback finding that this feedback could have played an
important role in the context of AGN-host coevolution in HLAGN which show
evidence of AGN-related radio emission ().Comment: 20 pages, 14 figure