78 research outputs found
Riemannov teorem
U ovom radu dokazujemo Riemannov teorem koji dokazuje da svaka elementarna domena razliÄita od skupa kompleksnih brojeva je konformno ekvivalenta jediniÄnom krugu.In this thesis, we prove Riemannās theorem proving that each elementary domain is diļ¬erent from the set of complex numbers is conformally equivalent unit disk
The impact of climate change on biodiversity of freshwater insect
Vode na kopnu Äine 0.8 % povrÅ”ine Zemlje, ali su staniÅ”te za otprilike 10 % poznatih
vrsta Äija je bioraznolikost stavljena na rizik u globalnoj razini. Veliku veÄinu takvih staniÅ”ta
saÄinjavaju slatkovodni kukci. NajÄesÄe susreÄemo dvokrilce, vodencvjetove, vretenca,
obalÄare, polukrilce, muljare, tulare, opnokrilce, kornjaÅ”e i leptire. Oni su pod utjecajem
abiotiÄkih uvjeta koji odražavaju gradijente Å”irine, temperature i vlage te kemijskih
karakteristika zraka i tla.Vodeni biomi se razlikuju po veliÄini, dubini, brzini protoka i morskom
utjecaju (npr. jezera, potoci, rijeke, uÅ”Äa). Uvjeti okoline nisu statiÄni, veÄ se mijenjaju sezonski
i godiÅ”nje. Mnogi kukci imaju u velikoj mjeri neoÄekivanu fizioloÅ”ku sposobnost za borbu s
ekstremnim temperaturama i relativnom vlažnoÅ”Äu u najtežim ekosustavima planeta. Mnoge
vrste pokazuju najmanje ograniÄenu homeostatsku sposobnost (tj. sposobnost reguliranja
unutarnje temperature i sadržaja vode). Neke su vrste sposobne brzo regulirati tjelesnu toplinu
ili sadržaj vode kontrakcijom miÅ”iÄa, uzdizanjem tijela iznad vruÄih povrÅ”ina, traženjem sjene
ili iskopavanjem. BioloÅ”ka invazija vrsta toplijih podruÄja, poviÅ”ena koncentracija hranjivih
tvari u vodama uslijed jaÄega ispiranja s kopna, poveÄana primarna produkcija i ostali
poremeÄaji u hranidbenim lancima, pojaÄana eutrofikacija te smanjena koncentracija kisika u
vodama su samo neki od poremeÄaja s kojima Äe se takvi ekosustavi u buduÄnosti boriti. Pred
slatkovodnim ekosustavima dolazi velik izazov suprostavljanju klimatskim promjenama koje
se dogaÄaju zadnjih 100 godina, a i nastavaljaju sve veÄim intezitetom kroz neodreÄeni period
pod pretpostavkom poveÄanja temperature za 4 Ā°C, abiotskog Äimbenika na koji su kukci
najviŔe osjetljivi.Onshore waters make up to 0.8 % of the Earth's surface, but they are home to
approximately 10 % of known species whose biodiversity is at risk globally. The vast majority
of such species are freshwater insects. Most often we find flies, mayflies, odonates, shorebirds,
true bugs, megalopterans, casddisflies, hymenopterans, beetles and butterflies. They are
influenced by abiotic conditions that reflect the gradients of latitude, temperature and humidity,
and the chemical characteristics of air and soil. Aquatic habitats vary in size, depth, flow rate,
and marine impact (e.g. lakes, streams, rivers, estuaries). Environmental conditions are not
static, but change seasonally and annually. Many insects have a largely unexpected
physiological ability to cope with extreme temperatures and relative humidity in the planet's
most difficult ecosystems. Many species exhibit at least limited homeostatic ability (i.e. ability
to regulate internal temperature and water content). Some of them are capable of quickly
regulating body heat or water content by contracting muscles, lifting the body above hot
surfaces, seeking shade, or excavating. Biological invasion of warm-area species, higher
concentrations of nutrients in water followed by strong flushes with land, increased primary
production and other disturbances in food chains, eutrophication occurred and decreased
oxygen concentration in water are some of the disturbances that will such ecosystems face in
future. Freshwater ecosystems face the great challenge of confronting climate change that has
been occurring for the past 100 years, and continues to increase in intensity over an indefinite
period with prediction of 4 Ā°C temperature rise, abiotic condition that has most effects on
insects
Riemannov teorem
U ovom radu dokazujemo Riemannov teorem koji dokazuje da svaka elementarna domena razliÄita od skupa kompleksnih brojeva je konformno ekvivalenta jediniÄnom krugu.In this thesis, we prove Riemannās theorem proving that each elementary domain is diļ¬erent from the set of complex numbers is conformally equivalent unit disk
The impact of climate change on biodiversity of freshwater insect
Vode na kopnu Äine 0.8 % povrÅ”ine Zemlje, ali su staniÅ”te za otprilike 10 % poznatih
vrsta Äija je bioraznolikost stavljena na rizik u globalnoj razini. Veliku veÄinu takvih staniÅ”ta
saÄinjavaju slatkovodni kukci. NajÄesÄe susreÄemo dvokrilce, vodencvjetove, vretenca,
obalÄare, polukrilce, muljare, tulare, opnokrilce, kornjaÅ”e i leptire. Oni su pod utjecajem
abiotiÄkih uvjeta koji odražavaju gradijente Å”irine, temperature i vlage te kemijskih
karakteristika zraka i tla.Vodeni biomi se razlikuju po veliÄini, dubini, brzini protoka i morskom
utjecaju (npr. jezera, potoci, rijeke, uÅ”Äa). Uvjeti okoline nisu statiÄni, veÄ se mijenjaju sezonski
i godiÅ”nje. Mnogi kukci imaju u velikoj mjeri neoÄekivanu fizioloÅ”ku sposobnost za borbu s
ekstremnim temperaturama i relativnom vlažnoÅ”Äu u najtežim ekosustavima planeta. Mnoge
vrste pokazuju najmanje ograniÄenu homeostatsku sposobnost (tj. sposobnost reguliranja
unutarnje temperature i sadržaja vode). Neke su vrste sposobne brzo regulirati tjelesnu toplinu
ili sadržaj vode kontrakcijom miÅ”iÄa, uzdizanjem tijela iznad vruÄih povrÅ”ina, traženjem sjene
ili iskopavanjem. BioloÅ”ka invazija vrsta toplijih podruÄja, poviÅ”ena koncentracija hranjivih
tvari u vodama uslijed jaÄega ispiranja s kopna, poveÄana primarna produkcija i ostali
poremeÄaji u hranidbenim lancima, pojaÄana eutrofikacija te smanjena koncentracija kisika u
vodama su samo neki od poremeÄaja s kojima Äe se takvi ekosustavi u buduÄnosti boriti. Pred
slatkovodnim ekosustavima dolazi velik izazov suprostavljanju klimatskim promjenama koje
se dogaÄaju zadnjih 100 godina, a i nastavaljaju sve veÄim intezitetom kroz neodreÄeni period
pod pretpostavkom poveÄanja temperature za 4 Ā°C, abiotskog Äimbenika na koji su kukci
najviŔe osjetljivi.Onshore waters make up to 0.8 % of the Earth's surface, but they are home to
approximately 10 % of known species whose biodiversity is at risk globally. The vast majority
of such species are freshwater insects. Most often we find flies, mayflies, odonates, shorebirds,
true bugs, megalopterans, casddisflies, hymenopterans, beetles and butterflies. They are
influenced by abiotic conditions that reflect the gradients of latitude, temperature and humidity,
and the chemical characteristics of air and soil. Aquatic habitats vary in size, depth, flow rate,
and marine impact (e.g. lakes, streams, rivers, estuaries). Environmental conditions are not
static, but change seasonally and annually. Many insects have a largely unexpected
physiological ability to cope with extreme temperatures and relative humidity in the planet's
most difficult ecosystems. Many species exhibit at least limited homeostatic ability (i.e. ability
to regulate internal temperature and water content). Some of them are capable of quickly
regulating body heat or water content by contracting muscles, lifting the body above hot
surfaces, seeking shade, or excavating. Biological invasion of warm-area species, higher
concentrations of nutrients in water followed by strong flushes with land, increased primary
production and other disturbances in food chains, eutrophication occurred and decreased
oxygen concentration in water are some of the disturbances that will such ecosystems face in
future. Freshwater ecosystems face the great challenge of confronting climate change that has
been occurring for the past 100 years, and continues to increase in intensity over an indefinite
period with prediction of 4 Ā°C temperature rise, abiotic condition that has most effects on
insects
The impact of climate change on biodiversity of freshwater insect
Vode na kopnu Äine 0.8 % povrÅ”ine Zemlje, ali su staniÅ”te za otprilike 10 % poznatih
vrsta Äija je bioraznolikost stavljena na rizik u globalnoj razini. Veliku veÄinu takvih staniÅ”ta
saÄinjavaju slatkovodni kukci. NajÄesÄe susreÄemo dvokrilce, vodencvjetove, vretenca,
obalÄare, polukrilce, muljare, tulare, opnokrilce, kornjaÅ”e i leptire. Oni su pod utjecajem
abiotiÄkih uvjeta koji odražavaju gradijente Å”irine, temperature i vlage te kemijskih
karakteristika zraka i tla.Vodeni biomi se razlikuju po veliÄini, dubini, brzini protoka i morskom
utjecaju (npr. jezera, potoci, rijeke, uÅ”Äa). Uvjeti okoline nisu statiÄni, veÄ se mijenjaju sezonski
i godiÅ”nje. Mnogi kukci imaju u velikoj mjeri neoÄekivanu fizioloÅ”ku sposobnost za borbu s
ekstremnim temperaturama i relativnom vlažnoÅ”Äu u najtežim ekosustavima planeta. Mnoge
vrste pokazuju najmanje ograniÄenu homeostatsku sposobnost (tj. sposobnost reguliranja
unutarnje temperature i sadržaja vode). Neke su vrste sposobne brzo regulirati tjelesnu toplinu
ili sadržaj vode kontrakcijom miÅ”iÄa, uzdizanjem tijela iznad vruÄih povrÅ”ina, traženjem sjene
ili iskopavanjem. BioloÅ”ka invazija vrsta toplijih podruÄja, poviÅ”ena koncentracija hranjivih
tvari u vodama uslijed jaÄega ispiranja s kopna, poveÄana primarna produkcija i ostali
poremeÄaji u hranidbenim lancima, pojaÄana eutrofikacija te smanjena koncentracija kisika u
vodama su samo neki od poremeÄaja s kojima Äe se takvi ekosustavi u buduÄnosti boriti. Pred
slatkovodnim ekosustavima dolazi velik izazov suprostavljanju klimatskim promjenama koje
se dogaÄaju zadnjih 100 godina, a i nastavaljaju sve veÄim intezitetom kroz neodreÄeni period
pod pretpostavkom poveÄanja temperature za 4 Ā°C, abiotskog Äimbenika na koji su kukci
najviŔe osjetljivi.Onshore waters make up to 0.8 % of the Earth's surface, but they are home to
approximately 10 % of known species whose biodiversity is at risk globally. The vast majority
of such species are freshwater insects. Most often we find flies, mayflies, odonates, shorebirds,
true bugs, megalopterans, casddisflies, hymenopterans, beetles and butterflies. They are
influenced by abiotic conditions that reflect the gradients of latitude, temperature and humidity,
and the chemical characteristics of air and soil. Aquatic habitats vary in size, depth, flow rate,
and marine impact (e.g. lakes, streams, rivers, estuaries). Environmental conditions are not
static, but change seasonally and annually. Many insects have a largely unexpected
physiological ability to cope with extreme temperatures and relative humidity in the planet's
most difficult ecosystems. Many species exhibit at least limited homeostatic ability (i.e. ability
to regulate internal temperature and water content). Some of them are capable of quickly
regulating body heat or water content by contracting muscles, lifting the body above hot
surfaces, seeking shade, or excavating. Biological invasion of warm-area species, higher
concentrations of nutrients in water followed by strong flushes with land, increased primary
production and other disturbances in food chains, eutrophication occurred and decreased
oxygen concentration in water are some of the disturbances that will such ecosystems face in
future. Freshwater ecosystems face the great challenge of confronting climate change that has
been occurring for the past 100 years, and continues to increase in intensity over an indefinite
period with prediction of 4 Ā°C temperature rise, abiotic condition that has most effects on
insects
Riemannov teorem
U ovom radu dokazujemo Riemannov teorem koji dokazuje da svaka elementarna domena razliÄita od skupa kompleksnih brojeva je konformno ekvivalenta jediniÄnom krugu.In this thesis, we prove Riemannās theorem proving that each elementary domain is diļ¬erent from the set of complex numbers is conformally equivalent unit disk
Computer-Assisted Proving of Combinatorial Conjectures Over Finite Domains: A Case Study of a Chess Conjecture
There are several approaches for using computers in deriving mathematical
proofs. For their illustration, we provide an in-depth study of using computer
support for proving one complex combinatorial conjecture -- correctness of a
strategy for the chess KRK endgame. The final, machine verifiable, result
presented in this paper is that there is a winning strategy for white in the
KRK endgame generalized to board (for natural greater than
). We demonstrate that different approaches for computer-based theorem
proving work best together and in synergy and that the technology currently
available is powerful enough for providing significant help to humans deriving
complex proofs
Computer-Assisted Proving of Combinatorial Conjectures Over Finite Domains: A Case Study of a Chess Conjecture
There are several approaches for using computers in deriving mathematical
proofs. For their illustration, we provide an in-depth study of using computer
support for proving one complex combinatorial conjecture -- correctness of a
strategy for the chess KRK endgame. The final, machine verifiable, result
presented in this paper is that there is a winning strategy for white in the
KRK endgame generalized to board (for natural greater than
). We demonstrate that different approaches for computer-based theorem
proving work best together and in synergy and that the technology currently
available is powerful enough for providing significant help to humans deriving
complex proofs
PonaÅ”anje pri savijanju toplinski obraÄenih aluminijskih pjena
Metalne pjene su porozni, Äelijasti materijali s vrlo nejednolikom strukturom. Upravo ta struktura znaÄajno utjeÄe na njihova mehaniÄka svojstva. Glavni cilj ovog rada bio je ispitivanje savojnih svojstava uzoraka okruglog profila, jednakog olumena i gustoÄe, napravljenih od aluminijske pjene legure AlMgSi0, 6 s zatvorenim Äelijama, a koji su toplinski obraÄeni. Zbog toga su provedena ispitivanja mehaniÄke otpornosti pri savijanju na kidalici uzoraka od kojih je polovica hlaÄena u vodi, a polovica na zraku. Dio uzoraka ohlaÄenih na zraku podvrgnuti homogenizaciji i umjetnom dozrijevanju, a dio ohlaÄenih u vodi umjetnom dozrijevanju
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