In order to limit pollution risk and develop proper remediation strategies, soil quality has to be controlled by rapid and sustainable monitoring measures. Visible and near-infrared reflectance ...spectroscopy (VisNIR) is an attractive surrogate to time-consuming and costly classical soil assessment protocols. It highly depends on selecting appropriate data mining methods for regression analysis. In this study, performance of a state of the art learning algorithm called extreme learning machine (ELM), was evaluated through comparing with the other calibration methods proposed in the literature for predicting lead (Pb) and Zinc (Zn) concentrations. Solid samples collected from a mine waste dump (n=120) were scanned using a Fieldspec3 portable spectroradiometer with a measurement range of (350–2500nm) in a laboratory. Transformation of the reflectance spectra to absorbance was followed by three pre-processing scenarios including Savitzky-Golay smoothing (SG), first derivative (FD) and second derivative (SD). Partial Least Square Regression (PLSR), Support Vector Machine (SVM) and neural networks with two learning algorithms models (back propagation and extreme learning machine), were calibrated on spectral features selected by genetic algorithm, and then applied to predict soil metal concentrations. The best prediction accuracy was obtained by FD-ELM method with R2p, RMSEp, concordance correlation coefficient and RPD values of 0.93, 63.01, 0.98 and 5.92 for Pb and 0.87, 167.90, 0.91 and 5.62 for Zn, respectively. Study of the prediction mechanism proved that element sorption by spectrally active Fe-oxide and clay contents of the soil was the major mechanism by which the spectrally featureless Pb and Zn ions can be predicted. The spatial patterns of predicted toxic elements showed that FD-ELM had the most similarity with those maps obtained by interpolating measured values. Over all, it is concluded that reflectance spectroscopy combined with the ELM algorithm is a rapid, inexpensive and accurate tool for indirect evaluation of Pb and Zn and mapping their spatial distribution in dumpsite soils of Sarcheshmeh copper mine.
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•Soil contamination with toxic elements poses significant environmental risks.•VisNIR spectroscopy was used to predict soil Pb and Zn contents of a mine waste dump.•Correlation among elements and some soil features justified the prediction mechanism.•The best prediction accuracy was obtained by FD-ELM model.•VisNIR with ordinary kriging produced spatial distribution maps of Pb and Zn.
This paper reports microthermometric and noble gas isotope data for fluid inclusion assemblages (FIAs) with evidence of phase separation, i.e. coexisting vapor-rich and halite-saturated inclusions, ...hosted in the early-formed quartz stockwork veins and post-magmatic quartz eye crystals in two economic porphyry Cu deposits (PCDs; Sar Cheshmeh and Miduk) and two sub-economic prospects (Sar Kuh and Abdar) from the Kerman porphyry copper belt (KPCB), Iran. The multiphase halite-saturated inclusions (i.e., Type I) in all studied PCDs and prospects had the highest homogenization temperature (
T
h
= 525–594 °C) and salinities (63–73 wt% NaCl
equiv
), whereas vapor-rich inclusions (Type II) had lower
T
h
(362–460 °C). Fluid inclusion data show that like economic PCDs, the sub-economic prospects were formed in a fertile hydrothermal system and benefited from a mineralizing fluid, which evolved from a primary hot (mostly > 400 °C), metal-rich and oxidized fluid (as evidenced by the presence of opaque- and hematite-bearing fluid inclusions) of unknown salinity, which underwent a phase separation process to form both brine and vapor phases in the early stage of mineralization. The helium abundance and its isotopic composition document a mantle-derived magmatic source for the primary ore fluid in the formation of the studied PCDs and prospects (
3
He/
4
He ratios ranging from 0.46 to 2.8 Ra, corresponding to a mantle He contribution in ore fluids between ~ 7 and 45%). However, subsequent hydrothermal processes, i.e., vapor–brine phase separation, fluid-rock interaction with crustal rocks, and mixing with meteoric pore water containing dissolved atmospheric (e.g., Ne and Xe) and some crustal noble gases (e.g., Ar), changed the initial noble gas composition of the magmatic ore fluid to predominantly atmospheric- and crustal-like compositions. A significant proportion of mantle-derived He (up to 45%) in high-temperature (513–594 °C) and high-salinity (61.5–73 wt% NaCl
equiv
) FIAs may indicate the existence of buried, economic, porphyry Cu mineralization in the Abdar prospect; therefore, it is suggested to be a possible target for further exploration. Comparing the He and Ar noble gas isotope composition in porphyry copper systems of different size and economic importance in this study showed that the ore-forming fluids of the outsized PCD (i.e., Sar Cheshmeh) have higher contributions of crustal-derived fluids characterized by predominantly radiogenic noble gas signatures (
4
He and
40
Ar) than the smaller PCDs. This could have been achieved by a prolonged hydrothermal circulation in a large volume of crustal rocks containing radiogenic noble gases under a long-lived heat regime resulting from a deeply emplaced and slowly cooled composite intrusive body.
NOVAČAN IN PREŽIH O PARIZU Ferlež, Urh
Slavistična revija,
04/2021, Letnik:
69, Številka:
1
Journal Article
Recenzirano
Odprti dostop
Članek obravnava Antona Novačana in Prežihovega Voranca, ki sta v različnih zgodovinskih obdobjih nekaj časa preživela v Parizu, svojčas središču svetovne umetnosti. Novačan je bil tam kot študent, ...Prežih kot agent profinterne. Novačan je vanj postavil črtici iz zbirke Samosilnik, Prežih pa je svojo izkušnjo opisal v razmišljanjih iz zbirke Borba na tujih tleh. Obravnavana dela kažejo na svetovljanskost obeh avtorjev. Pri Novačanu opazujemo njegovo slogovno inovativnost in hkrati zgledovanje pri sočasnih literarnih tokovih, pri Prežihu pa opisovanje življenja raznih socialnih stanov v velikem mestu. Namen članka je predstaviti vpliv kulturne metropole Pariza na pisatelja različnih socialnih položajev in političnih prepričanj ter posledično na slovensko književnost, obenem pa nakazati pogled pisca s kulturne periferije na tamkajšnje življenje in kulturno dogajanje.
This paper reports the result of an archeology survey in the Pariz region, situated in Kerman Province, in the southeastern of Iran. This investigation was only identifying Paleolithic sites. The ...Paleolithic sites have been discovered in the Zagros Mountains, central, north, and northwest of Iran, but the southeastern part is somehow still unknown. That is just the first part of a bigger survey carried for our Ph.D. The sites include 11 caves, and the 9 open sites found in Pariz all of which are located in an area of approximately 150 square km.
Cet article présente les résultats d’une étude archéologique dans la région de Pariz, située dans la province de Kerman, au Sud-Est de l’Iran. Cette étude se concentre uniquement sur les sites paléolithiques. Ceux-ci ont été découverts dans les montagnes de Zagros, au centre, au Nord et au Nord-Ouest de l’Iran. Le Sud-Est de la région est encore mal connu. Notre analyse s’inscrit dans la réalisation d’un doctorat dont le champ d’investigation est plus large. Les sites comprennent 11 grottes et les 9 sites découverts à Pariz, tous situés dans une zone d’environ 150 km2.
Bl. Augustin Kažotić zacijelo je najznačajnija osoba glazbenog srednjovjekovlja, djelatna u sjevernoj Hrvatskoj. Njegova se glazbena djelatnost može artikulirati u trima područjima: kao reformatora ...crkvenog pjevanja, kao organizatora novoga obreda i kao skladatelja. Kao zagrebački biskup (1301-1322) vrlo je vjerojatno reformirao crkveno pjevanje u zagrebačkoj katedrali u podučavanju i izvođenju, u inovirani obred unio je novi raspored i način iznošenja pjevanih brojeva u liturgijskoj ‘dramaturgiji’ i uveo neke inovacije u repertoaru. Zasad je nepotvrđeni autor nekoliko skladbi tiskanih kasnije u zbirkama Cithara octochorda (1701) i/ili Cantuale processionum (1751).
The concept of authoritarianism is used in the text as a way to shed light on the authoritarian political and military activities of those countries that ignore the modern civilisation’s legal and ...moral achievements in an attempt to “envelop time” in concepts such as propaganda, war and terrorism. Reflections on war include theses by Sigmund Freud, Erich Fromm, Claude Lévi- Strauss, Friedrich Nietzsche, Noam Chomsky, and other authors who “expand the framework” of war. This broadened context is then used in order to observe the phenomena of “global war” and “media war”, and the terrorist attack in Paris. The goal is to highlight the new/old role of the mass media’s “manufacturing consent”, and to clarify the role and power of media in the current rise of terrorism in the world.
Samo značenje sajma Museum Connections potvrđuje i činjenica kako se svake godine povećava broj izlagača na njemu. Inovacije u segmentu mobilnih aplikacija, namještaja, audiovodiča, multimedije, ...obrazovnih uređaja, igara, proširene i virtualne stvarnosti, novih tehnologija s naglaskom na sponzorstvima – obilježile su ovogodišnji sajam. Potrebe u muzejskim djelatnostima već su odavno prerasle ponudu kineskih šalica za kavu i jeftinih pamučnih majica u suvenirnicama, a posjetitelji već godinama traže nove vrijednosti za svoj novac. Ideje o kojima se raspravljalo ove godine u Parizu potvrđuju kako se muzejska industrija iz godine u godinu razvija, ne samo u segmentu maloprodaje već i u poboljšanju programske podrške, sustava naplate i tehničkih uređaja. Usto, na sajmu se moglo vidjeti na koji sve način tvrtke razvijaju kulturnu ponudu – od inovacija u izradi suvenira i pribora za pisanje do modnih ponuda, pa čak i namještaja.
U časopisu Hrvatski (2017., 1-2, str. 47. – 63.) pisao sam o dvogodišnjem nastavnom radu u školskim godinama 2015./2016. i 2016./2017. u Hrvatskoj školi Bartola Kašića na jugoistoku Francuske: ...Annecyju, Chambéryju, Lyonu i Nici. Preselio sam se zatim u Pariz te nastavio raditi u istoj školi. Predavao sam hrvatski jezik i kulturu u Parizu i Beauvaisu, gradiću u Pikardiji, te ću u ovom broju predstaviti svoj nastavni rad u tom dijelu Francuske.
Autor uz pregled Le Corbusierova urbanističkog opusa 1920-ih i 1930-ih godina u kontekstu ostalih rezultata njegova međuratnog djelovanja donosi strukturalnu i simboličku determinaciju plana ...rekonstrukcije središta Pariza, predstavljenoga 1937. na izložbi L’esprit nouveau u Pavillon des temps nouveaux (izložba Nove umjetnosti u Paviljonu novih vremena) u Parizu. Plan je postavljen kao svojevrsna prekretnica u urbanističkom opusu i kao uvod u novu fazu stvaralaštva, nazretog u obrisima drukčijega urbanističko-mislilačkog koncepta. Elementi plana koji na navedeno upučuju središnja su tema ovoga članka.
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