cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Relating Microbial Community Structure and Geochemistry in Deep Regolith Developed on Volcaniclastic Rock in the Luquillo Mountains, Puerto Rico
Creators: name: Liermann, Laura J.
name: Istvan Albert
name: Buss, Heather L.
name: Minyard, Morgan
name: Brantley, Susan L.
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Biological Sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Microbiology

description: Fe oxidation is often the first chemical reaction that initiates weathering and disaggregation of intact bedrock into regolith. Here we explore the use of pyrosequencing tools to test for evidence that bacteria participate in these reactions in deep regolith. We analyze regolith developed on volcaniclastic rocks of the Fajardo formation in a ridgetop within the rainforest of the Luquillo Mountains of Puerto Rico. In the 9-m-deep regolith profile, the primary minerals chlorite, feldspar, and pyroxene are detected near 8.3 m but weather to kaolinite and Fe oxides found at shallower depths. Over the regolith profile, both total and heterotrophic bacterial cell counts generally increase from the bedrock to the surface. Like other soil microbial studies, the dominant phyla detected are Proteobacteria, Acidobacteria, Planctomycetes, and Actinobacteria. Proteobacteria (α, β, γ and δ) were the most abundant at depth (6.8–9 m, 41–44%), while Acidobacteria were the most abundant at the surface (1.4–4.4 m, 37–43%). Despite the fact that Acidobacteria dominated surficial communities while Proteobacteria dominated near bedrock, the near-surface and near-bedrock communities were not statistically different in structure but were statistically different from mid-depth communities. Approximately 21% of all sequences analyzed did not match known sequences: the highest fraction of unmatched sequences was greatest at mid-depth (45% at 4.4 m). At the regolith-bedrock interface where weathering begins, several lines of evidence are consistent with biotic Fe oxidation. At that interface, iron-related bacterial activity tests and culturing indicate the presence of iron-related bacteria, and phylogenetic analyses identified sub-phyla containing known iron-oxidizing microorganisms. Cell densities of iron-oxidizers in the deep saprolite were estimated to be on the order of 105 cells g−1. Overall Fe loss was also observed at the regolith-bedrock interface, consistent with bacterial production of organic acids and leaching of Fe-organic complexes. Fe-organic species were also detected to be enriched near the bedrock-regolith interface. In this and other deep weathering profiles, chemolithoautotrophic bacteria that use Fe for energy and nitrate or oxygen as an electron acceptor may play an important role in initiating disaggregation of bedrock.
Strategisk jernbaneplanlægning: Eksemplet Norrbotniabanan
Creators: name: Hansen, Sten
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: I marts 2002 i gangsatte det kommunale samarbejdsorgan Norrbotniabanegruppen et udvidet idestudie af en ca. 400 km lang ny kystjernbane fra Umeå til Haparanda i Nordsverige. Formålet med banen er at mindske industriens transportomkostninger og øge indbyggernes tilgængelighed til arbejdspladser og videregående uddannelse. Formålet med dette indlæg er at præsentere de metoder, der er anvendt i det udvide idestudie og hvilke problemstillinger som er behandlet i en strategisk udredning af et stort jernbaneprojekt
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Approximations to optimal sequences in single-gripper and dual-gripper robotic cells with circular layouts
Creators: name: Jung, Kyung Sung
name: H. Neil Geismar
name: Pinedo, Michael
name: Sriskandarajah, Chelliah
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Biophysics
subject: Space Science
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: This article considers the problems of scheduling operations in single-gripper and dual-gripper bufferless robotic cells in which the arrangement of machines is circular. The cells are designed to produce identical parts under the free-pickup criterion with additive intermachine travel time. The objective is to find a cyclic sequence of robot moves that minimizes the long-run average time required to produce a part or, equivalently, that maximizes the throughput. Obtaining an efficient algorithm for an approximation to an optimal k-unit cyclic solution (over all k ≥ 1) is the focus of this article. The proposed algorithms introduce a new class of schedules, which are refered to as epi-cyclic cycles. A polynomial algorithm with a 5/3-approximation to an optimal k-unit cycle over all cells is developed. The performed structural analysis for dual-gripper cells leads to a polynomial-time algorithm that provides at worst a 3/2-approximation for the practically relevant case in which the dual-gripper switch time is less than twice the intermachine robot movement time. A computational study demonstrates that the algorithm performs much better on average than this worst-case bound suggests. The performed theoretical studies are a stepping stone for researching the complexity status of the corresponding domain. They also provide theoretical as well as practical insights that are useful in maximizing productivity of any cell configuration with either type of robot.
Dansk og norsk transportplanlegging – med fokus på jernbaneplanlegging
Creators: name: Haugen, Anne Siri
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: • Norske "Nasjonel transportplan" skiller seg fra det danske plansystemet ved formalisert samarbeid mellom fagorganene for vei, jernbane, sjø og luftfart i departementets sektorovergripende langsiktige planarbeid, som videre går til politisk behandling. • Intensjonene bak Nasjonal trasnportplan er gode, men fordi planen ikke er økonomisk bindende gir det danske systemet med "anlegslov" o.l bedre forutsigbarhet. • Mange felles utfordringer på plansiden. • Ulik rolle- og ansvarsfordelingen i jernbanesektoren medfører at Jernbaneverket i Norge har ansvaret for prioritering mellom drift / vedlikehold og langsiktige investeringer, i Danmark er dette plasssert hos henholdsvis Banedanmark og trafikstyrelsen for jernbane og ferger.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Characterization of the Air Quality in Split, Croatia Focusing Upon Fine and Coarse Particulate Matter Analysis
Creators: name: Periš, Nenad
name: Maša Buljac
name: Bralić, Marija
name: Buzuk, Marijo
name: Brinić, Slobodan
name: Plazibat, Ivana
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Cell Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Mathematics
subject: FOS: Mathematics
subject: Biological Sciences
subject: Sociology
subject: FOS: Sociology
subject: Ecology
subject: FOS: Biological sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Microbiology
subject: Engineering

description: The study presents statistical analysis of air quality parameters for a five-year period including PM2.5 (particles with an aerodynamic diameter, da 10 (da x, NO2, SO2, and black smoke data. Average concentrations of PM2.5 at three different stations were 28.2, 19.9, and 14.3 µg m−3, whereas those for PM10 were 17.8, 25.8, and 15.2 µg m−3. Generally, high correlations between PM2.5 and PM10 (0.62 and 0.54 respectively) were determined between industrial and residential stations, while lower correlation (0.22 between PM2.5 and PM10) was observed at a station in traffic and industrial area. Contributions of different sources were determined using multivariate receptor modeling (principal component analysis and cluster analysis) and it was found that the major source of pollution was in accordance with the station position. Comparison of particle mass concentrations with those reported for different European cities indicate lower loading for PM in the Split Region.
Ambiguity in the Cross-Section of Expected Returns: An Empirical Assessment
Creators: name: Thimme, Julian
name: Völkert, Clemens
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Earth and Environmental Sciences
subject: Plant Biology
subject: FOS: Biological sciences
subject: Science Policy
subject: Cancer
subject: Mathematics
subject: FOS: Mathematics
subject: Biological Sciences
subject: Biotechnology

description: This paper estimates and tests the smooth ambiguity model of Klibanoff, Marinacci, and Mukerji (2005, 2009) based on stock market data. We introduce a novel methodology to estimate the conditional expectation which characterizes the impact of a decision maker’s ambiguity attitude on asset prices. Our point estimates of the ambiguity parameter are between 25 and 60, whereas our risk aversion estimates are considerably lower. The substantial difference indicates that market participants are ambiguity averse. Furthermore, we evaluate if ambiguity aversion helps explaining the cross-section of expected returns. Compared with Epstein and Zin (1989) preferences, we find that incorporating ambiguity into the decision model improves the fit to the data while keeping relative risk aversion at more reasonable levels.
Relating microbial community structure and geochemistry in deep regolith developed on volcaniclastic rock in the Luquillo Mountains, Puerto Rico
Creators: name: Liermann, Laura J.
name: Istvan Albert
name: Buss, Heather L.
name: Minyard, Morgan
name: Brantley, Susan L.
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Biological Sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Microbiology

description: Fe oxidation is often the first chemical reaction that initiates weathering and disaggregation of intact bedrock into regolith. Here we explore the use of pyrosequencing tools to test for evidence that bacteria participate in these reactions in deep regolith. We analyze regolith developed on volcaniclastic rocks of the Fajardo formation in a ridgetop within the rainforest of the Luquillo Mountains of Puerto Rico. In the 9 meter-deep regolith profile, the primary minerals chlorite, feldspar, and pyroxene are detected near 8.3 m but weather to kaolinite and Fe oxides found at shallower depths. Over the regolith profile, both total and heterotrophic bacterial cell counts generally increase from the bedrock to the surface. Like other soil microbial studies, the dominant phyla detected are Proteobacteria, Acidobacteria, Planctomycetes, and Actinobacteria. Proteobacteria (a, b, g and d) were the most abundant at depth (6.8 – 9 m, 41 – 44%), while Acidobacteria were the most abundant at the surface (1.4 - 4.4 m, 37 – 43%). Despite the fact that Acidobacteria dominated surficial communities while Proteobacteria dominated near bedrock, the near-surface and near-bedrock communities were not statistically different in structure but were statistically different from mid-depth communities. Approximately 21% of all sequences analyzed did not match known sequences: the highest fraction of unmatched sequences was greatest at mid-depth (45% at 4.4 m).At the regolith-bedrock interface where weathering begins, several lines of evidence are consistent with biotic Fe oxidation. At that interface, iron-related bacterial activity tests and culturing indicate the presence of iron-related bacteria, and phylogenetic analyses identified sub-phyla containing known iron-oxidizing microorganisms. Cell densities of iron-oxidizers in the deep saprolite were estimated to be on the order of 105 cells g−1. Overall Fe loss was also observed at the regolith-bedrock interface, consistent with bacterial production of organic acids and leaching of Fe-organic complexes. Fe-organic species were also detected to be enriched near the bedrock-regolith interface. In this and other deep weathering profiles, chemolithoautotrophic bacteria that use Fe for energy and nitrate or oxygen as an electron acceptor may play an important role in initiating disaggregation of bedrock.
Synthetically Useful Intermediates by Diazosulfone and Sulfonate C-H Insertion
Creators: name: Duminda S. Liyanage
name: Jungong, Christian S.
name: Novikov, Alexei V.
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Science Policy
subject: Biological Sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Evolutionary Biology
subject: Biotechnology
subject: Molecular Biology
subject: Cell Biology
subject: Biochemistry

description: Intramolecular C-H insertion on diazosulfone and diazosulfonate substrates was used to prepare synthetically useful intermediates from easily available starting materials.
Rapid and Efficient One-Pot Green Synthesis of 12-Aryl-8,9,10,12-tetrahydrobenzo[a]xanthene-11-ones Using Zr-MCM-41 Catalyst
Creators: name: Abolfazl Olyaei
name: Alidoust, Mona Ghodrat
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Biotechnology
Biological Sciences
Chemistry
Neuroscience
Molecular Biology
Cell Biology
Biochemistry

description: A new green protocol has been developed for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones via a three-component, one-pot condensation reaction of dimedone, naphthols, and aromatic aldehydes using Zr-MCM-41 nanoreactors as a reusable and novel catalyst at 80 °C under solvent-free conditions. Various aromatic aldehydes containing electron-withdrawing and electron-donating substituent at ortho-, meta-, or para-positions show equal effectiveness for product formation in good to excellent yields. Operational simplicity, mild reaction conditions, enhanced rates, environmental friendliness, high isolated yields of the pure products, and purification of products by nonchromatographic methods are significant advantages of the protocol presented here. The catalyst could be recycled and reused without a noticeably decrease in its activity.
Stereoselective Synthesis of cis- and trans-3,4,5-Trisubstituted-1,3-oxazolidin-2-one Derivatives from 1,2-Amino Alcohol Monoesters and Aziridine-2-carboxylates
Creators: name: Kaabi, Amani
name: Rafâa Besbes
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Biotechnology
subject: Plant Biology
subject: FOS: Biological sciences
subject: Biological Sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Medicine
subject: Biochemistry

description: New cis-N-alkyl-1,3-oxazolidin-2-ones were prepared in moderate to good yields via phosgenation of erythro-1,2-aminoalcohol monoesters, accompanied by formation of aziridine by-products. On the other hand, their regioisomers trans-N-alkyl-1,3-oxazolidin-2-ones were prepared regio- and stereoselectively in good yields by ring expansion of trans-N-alkyl aziridine-2-carboxylates.
Characterization of the Air Quality in Split, Croatia Focusing upon Fine and Coarse Particulate Matter Analysis
Creators: name: Periš, Nenad
name: Maša Buljac
name: Bralić, Marija
name: Buzuk, Marijo
name: Brinić, Slobodan
name: Plazibat, Ivana
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Cell Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Mathematics
subject: FOS: Mathematics
subject: Biological Sciences
subject: Sociology
subject: FOS: Sociology
subject: Ecology
subject: FOS: Biological sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Microbiology
subject: Engineering

description: The study presents statistical analysis of air quality parameters for a five-year period including PM2.5(particles with an aerodynamic diameter,da 10 (da x, NO2, SO2, and black smoke data. Average concentrations of PM2.5 at three different stations were 28.2, 19.9, and 14.3 µg m−3, while those for PM10 were 17.8, 25.8, and 15.2 µg m−3. Generally, high correlations between PM2.5 and PM10 (0.62 and 0.54 respectively) were determined between industrial and residential stations, while lower correlation (0.22 between PM2.5 and PM10) was observed at a station in traffic and industrial area. Contributions of different sources were determined using multivariate receptor modeling (principal component analysis and cluster analysis) and it was found that the major source of pollution was in accordance with the station position. Comparison of particle mass concentrations with those reported for different European cities indicate lower loading for PM in the Split Region.
Approximations to Optimal Sequences in Single-Gripper and Dual-Gripper Robotic Cells with Circular Layouts
Creators: name: Jung, Kyung Sung
name: H. Neil Geismar
name: Pinedo, Michael
name: Sriskandarajah, Chelliah
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Engineering
subject: Hematology
subject: Cancer
subject: Mathematics
subject: FOS: Mathematics
subject: Information and Computing Sciences
subject: Biological Sciences
subject: Biotechnology
subject: Biophysics

description: We consider the problem of scheduling operations in single-gripper and dual-gripper bufferless robotic cells in which the arrangement of machines is circular. The cells are designed to produce identical parts under the free-pickup criterion with additive intermachine travel-time. The objective is to find a cyclic sequence of robot moves that minimizes the long-run average time required to produce a part, or, equivalently, that maximizes the throughput. Obtaining an efficient algorithm for an approximation to an optimal k-unit cyclic solution (over all k ≥ 1) is the focus of this paper.Our algorithms introduce a new class of schedules which we refer to as epi-cyclic cycles. We develop a polynomial algorithm with a 5/3-approximation to an optimal k-unit cycle over all cells. Our structural analysis for dual-gripper cells leads to a polynomial-time algorithm that provides at worst a 3/2-approximation for the practically-relevant case in which the dual-gripper switch time is less than twice the intermachine robot movement time. Our computational study demonstrates that the algorithm performs much better on average than this worst-case bound suggests. Our theoretical studies are a stepping stone for researching the complexity status of the corresponding domain. They also provide theoretical as well as practical insights that are useful in maximizing productivity of any cell configuration with either type of robot.Supplementary materials are available for this article. Go to the publisher's online edition of IIE Transactions for the detailed proofs.
An Expeditious Coumarin Synthesis via a “Pseudocycloaddition” Between Salicylaldehydes and Ketene
Creators: name: Sosale Chandrasekhar
name: Honnaiah Vijay Kumar
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Cell Biology
subject: Biological Sciences
subject: Earth and Environmental Sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Biochemistry

description: A variety of salicylaldehydes effected tandem nucleophilic addition onto ketene, leading to corresponding coumarins in good yields under mild conditions. This “pseudocycloaddition” represents a very mild variant of the historic Perkin synthesis of coumarin (which remains of key interest in both perfumery and several emerging areas).
Approximations to optimal sequences in single-gripper and dual-gripper robotic cells with circular layouts
Creators: name: Jung, Kyung Sung
name: H. Neil Geismar
name: Pinedo, Michael
name: Sriskandarajah, Chelliah
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Engineering
subject: Hematology
subject: Cancer
subject: Mathematics
subject: FOS: Mathematics
subject: Information and Computing Sciences
subject: Biological Sciences
subject: Biotechnology
subject: Biophysics

description: This article considers the problems of scheduling operations in single-gripper and dual-gripper bufferless robotic cells in which the arrangement of machines is circular. The cells are designed to produce identical parts under the free-pickup criterion with additive intermachine travel time. The objective is to find a cyclic sequence of robot moves that minimizes the long-run average time required to produce a part or, equivalently, that maximizes the throughput. Obtaining an efficient algorithm for an approximation to an optimal k-unit cyclic solution (over all k ≥ 1) is the focus of this article. The proposed algorithms introduce a new class of schedules, which are refered to as epi-cyclic cycles. A polynomial algorithm with a 5/3-approximation to an optimal k-unit cycle over all cells is developed. The performed structural analysis for dual-gripper cells leads to a polynomial-time algorithm that provides at worst a 3/2-approximation for the practically relevant case in which the dual-gripper switch time is less than twice the intermachine robot movement time. A computational study demonstrates that the algorithm performs much better on average than this worst-case bound suggests. The performed theoretical studies are a stepping stone for researching the complexity status of the corresponding domain. They also provide theoretical as well as practical insights that are useful in maximizing productivity of any cell configuration with either type of robot.
Stereoselective Synthesis of cis- and trans-3,4,5-Trisubstituted-1,3-oxazolidin-2-one Derivatives from 1,2-Aminoalcohol Monoesters and Aziridine-2-carboxylates
Creators: name: Kaabi, Amani
name: Rafâa Besbes
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Biotechnology
subject: Plant Biology
subject: FOS: Biological sciences
subject: Biological Sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Medicine
subject: Biochemistry

description: New cis-N-alkyl-1,3-oxazolidin-2-ones were prepared in moderate to good yields via phosgenation oferythro-1,2-aminoalcohol monoesters, accompanied by formation of aziridine byproducts. On the other hand, their regioisomers trans-N-alkyl-1,3-oxazolidin-2-ones were prepared regio- and stereoselectively in high yields, by ring expansion of trans-N-alkyl aziridine-2-carboxylates.
Hvad er en banes kapacitet?
Creators: name: Nielsen, Benny Mølgaard
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: Hvad er en banes kapacitet? Hvordan måles den? Hvor meget er der af den? Kan der køre 12 tog i timen fra København H til Høje Taastrup? Eller 15? Eller 18? Eller ….? Mediernes omtale af banernes kapacitet antyder, at det er et meget elastisk begreb. Samtidig er viden om banernes kapacitet afgørende, når der skal laves aftaler om fremtidig trafikering og når det skal vurderes, om der skal investeres i øget kapacitet. Metoder, analyser og fremgangsmåde og empirisk grundlag Oplægget vil gennemgå de faktorer, der betyder noget, når en banes kapacitet skal fastsættelsen. Oplægget vil præsentere bud på enklere metoder til at opgøre kapaciteten. Der lægges vægt på gennemsigtighed og aktørernes forståelse og accept, uanset om der er tale om trafikplanlæggere, køreplanlæg-gere, trafikafviklere eller operatører. Oplægget vil berøre teoretiske metoder til beregning af banekapacitet. Oplægget vil lægge op til diskussion af fordele og ulemper ved de forskellige metoder.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Trafikstyrelsen sikkerhedsmyndighed for jernbanen
Creators: name: Petersen, Frede Bjerg
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: Fra 1.juli 2004 overgik Jernbanetilsynets opgaver på sikkerhedsområdet til Trafikstyrelsen, mens havariopgaverne overgik til Havarikommissionen for Civil luftfart og Jernbane. Sammenlægningen er bl.a. sket på baggrund af en politisk behandling og et ønske om at skabe forudsætningerne for en mere helhedsorienteret prioritering og regulering af jernbanesektoren og en mere eksplicit afvejning mellem de økonomiske rammer, de politiske ønsker til jernbanetrafikkens kvalitet og omfang og jernbanens sikkerhedsstandard. Forud for sammenlægningen har et af de store spørgsmål været hvordan man på samme tid kan opnå synergigevinsterne ved at integrere de sikkerhedsmæssige aspekter i de øvrige planlægningsprocesser i Trafikstyrelsen og samtidig tilgodese de særlige krav til uvildigt at kunne træffe afgørelser i sager vedrørende godkendelse og tilsyn. Paperet beskriver de udfordringer - af bl.a. ledelsesmæssig og organisatorisk art, der har knyttet sig til at integrere de sikkerhedsmæssige aspekter i Trafikstyrelsens opgavevaretagelse.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Rapid and Efficient One-Pot Green Synthesis of 12-Aryl-8,9,10,12-tetrahydrobenzo[a]xanthene-11-ones Using Zr-MCM-41 Catalyst
Creators: name: Abolfazl Olyaei
name: Alidoust, Mona Ghodrat
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Biotechnology
Biological Sciences
Chemistry
Neuroscience
Molecular Biology
Cell Biology
Biochemistry

description: A new green protocol has been developed for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones via a three component, one-pot condensation reaction of dimedone, naphthols and aromatic aldehydes using Zr-MCM-41 nanoreactors as a reusable and novel catalyst at 80 °C under solvent-free conditions. Various aromatic aldehydes containing electron-withdrawing and electron-donating substituent at ortho, meta or para-positions show equalease towards the product formation in high to excellent yields. Operational simplicity, mild reaction conditions, enhanced rates, environmentally benign, high isolated yields of the pure products and purification of products by non-chromatographic methods are significant advantages of the protocol presented here. The catalyst could be recycled and reused without a noticeably decrease in its activity.
Linkage between Culturable Mineral-Weathering Bacteria and Their Weathering Effectiveness Along a Soil Profile
Creators: name: Yajun Yu
name: Xiafang Sheng
name: Linyan He
name: Huang, Zhi
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Science Policy
subject: Biological Sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Neuroscience
subject: Microbiology

description: In this study, we used culture-dependent methodology to characterize the weathering effectiveness and community of culturable mineral-weathering bacteria in an ultisol profile. A total of 261 isolates were obtained and found to have the ability to weather biotite. The proportions of the highly effective Si and Al solubilizers were significantly higher in the D and E horizons than in the A, B, C, and F horizons, while the A, B, C, and F horizons had the similar proportion of the highly effective Si solubilizers. The B and F horizons had the lowest proportion of the highly effective Al solubilizers. The D horizon had the maximum proportion of the highly effective Fe solubilizers. Lowest proportion of the highly effective Fe solubilizers was observed in the A and F horizons. The 261 mineral-weathering isolates were affiliated with 39 bacterial species within 19 genera. Burkholderia anthina from the A and B horizons, Burkholderia stabilis from the C, D, and E horizons, and Curtobacterium citreum from the F horizon had the significantly higher ability to release Si, Al, and Fe from biotite. The results showed the diverse mineral-weathering bacteria and the linkage between the weathering species and their weathering effectiveness along a soil profile.
O'ZBEK TILI SHEVASIDA FE'L SO'Z TURKUMINI YASOVCHI AFFIKSLAR TAVSIFI (Amudaryo tumani oq oltin shevasi misolida)
Creators: name: A.F.Yangiboyeva , M. M. Boltaboyev
Publisher: name: Zenodo
Year: 2024

description: Anotatsiya

Ushbu maqolada Qoraqalog‘iston Respublikasi  Amudaryo tumani shevalarida  so‘z yasalish xususiyatlar va ularning etimalogik tatqiqining ayrim masalalariga qaratilgan bo‘lib, fe’l so‘z turkumini hosil qiluvchi morfologik va sintaktik vositalarning amaliy hamda nazari jihahatlari yoritilgan. Bundan tashqari Amudaryo jonli so‘zlashu nutqining ayrim emotsional-ekspressiv masalari haida ham fikr yuritilgan.

Tayanch so‘zlar: sheva, so‘z yasalishi, yasovchi asos, affikslar, fe’l.
Trafikale effekter af metroen på Frederiksberg
Creators: name: Ildensborg-Hansen, Jane
name: Vuk, Goran
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: Trafikale effekter af metroen på Frederiksberg er et forskningsprojekt, der er en del af en større før- og efteranalyse af metroen i København. I projektet belyses de trafikale effekter af metroen i forskellige områder af København. Frederiksberganalysen vedrører de trafikale effekter på Frederiksberg i forbindelse med åbningen af metroens fase 2a mellem Nørreport station og Frederiksberg station. I artiklen præsenteres resultaterne omkring trafikspring, transportmiddelskift og ændringer i turmønstre på hverdage. Der fokuseres dermed på, om introduktionen af metroen betyder øget trafik samt ændringer i folks valg af transportmidler og turdestinationer.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Undersøgelser på Aalborg Nærbane
Creators: name: Mølgaard, Jesper
name: Mikkelsen, Bo
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: I december 2003 åbnede der 5 nye stationer ved Aalborg og Aalborg Nærbane blev etableret. Aalborg Kommune, Nordjyllands Trafikselskab, Trafikstyrelsen og DSB har gennemført en spørgeskemaanalyse og en tælling på alle de nye stationer. Nærværende paper gennemgår de foreløbige erfaringer og resultater ifm. etableringen af nærbanen.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Ultrasound image deconvolution in symmetrical mirror wavelet bases
Creators: name: Yeoh, Wee Soon
name: Zhang, Cishen
name: Chen, Ming
name: Yan, Ming
Publisher: name: Swinburne
Year: 2024

description: Abstract not reproduced here by request of the publisher. The text is available from: http://dx.doi.org/10.1117/12.652635.
Citylogistikselskab - erfaringer og muligheder
Creators: name: Hvid, Erling
name: Bentzen, Kent
name: Nielsen, Tonny Lacomble
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2000

description: Tidligere undersøgelser har peget på, at godstransporten i danske byer kan gøres mere effektiv gennem en større koncentration og konsolidering af gods til byen. Der er således et potentiale for at reducere kørselsarbejdet i byen, såfremt transporterne omlægges til effektive transporter, dvs. transporter, der er geografisk koncentrerede, har store forsendelsesstørrelser og har høj kapacitetsudnyttelse. En af mulighederne for at effektivisere transporterne er at etablere city-logistikselskaber, dvs. selskaber, der kan tilbyde effektive transporter til transportkøbere. På denne baggrund har Vejdirektoratet og Aalborg Kommune med støtte fra Trafikministeriets Trafikpulje gennemført en analyse for nærmere at belyse mulighederne for etablering af et citylogistikselskab. Analysen er gennemført af COWI i samarbejde med NTU. Der er indhentet oplysninger om ca. 130 udenlandske projekter, som viser konkrete eksempler på, at det kan lade sig gøre at drive et citylogistikselskab på kommercielle markedsvilkår, og at der kan opnås miljøforbedringer i byen. På baggrund af den indsamlede viden er der opstillet koncepter for et citylogistikselskab, som er er vurderet ud fra en dialog med kommune, transportører og erhvervsliv i Aalborg samt med brancheorganisationer. I dette paper gennemgås videnindsamlingen og udviklingen af koncepterne.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 7 No. 1 (2000): Proceedings from the Annual Transport Conference at Aalborg University
Forslag til stambusnet i København
Creators: name: Rasmussen, Torsten
name: Vesterby, Kim
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2000

description: Ved åbningen af den københavnske Metro i oktober 2002 skal HT foretage en reduktion af bussernes driftsomfang og en tilpasning af busnettet til Metroen. HT kan i sin tilpasningsstrategi gå to veje. Den ene er blot at fortage tilpasninger og reduktioner. Det er en meget passiv strategi. Den anden vej er en offensiv strategi, der også giver områderne udenfor Metroens influens en forbedret busbetjening. Stategien omfatter etablering af et stambusnet i København, som et nyt højklasset, effektivt og kundevenligt produkt. I dette paper præsenteres stambuskonceptet, det foreliggende konkrete forslag til linienet og de foreløbige konklusioner.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 7 No. 1 (2000): Proceedings from the Annual Transport Conference at Aalborg University
A solvable Lie algebra condition for stability of linear multidimensional systems
Creators: name: Chu, Tianguang
name: Zhang, Cishen
name: Wang, Long
Publisher: name: Swinburne
Year: 2024

description: This note analyzes exponential stability of a class of linear discrete multidimensional systems. Using a multidimensional comparison principle for estimating the system componentwise exponential convergence and a solvable Lie algebra condition, a sufficient condition for exponential stability of linear multidimensional systems is presented. The stability condition can be easily examined by computing the system matrices in finite steps. This is demonstrated by an example.
Citybusstråket i Malmö
Creators: name: Krii, Stefan
name: Wendle, Björn
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2000

description: Under sommaren och hösten 1999 byggdes två av Malmös viktigaste kollektivtrafikstråk om för att öka framkomligheten, trafiksäkerheten och attraktiviteten längs stråket. Trånga gaturum och det centrala läget med stort inslag även av andra trafikanter krävde nya och innovativa lösningar för utformning och gestaltning. Bland åtgärderna finns bl a busskörfält, upphöjda korsningar och klackhållplatser. På många punkter har avsteg gjorts från befintliga svenska utformningsnormer för att få plats med alla de funktioner som gaturummet måste inrymma. Projektet har vetenskapligt dokumenterats och utvärderats med för- och efterstudier för flera olika områden, bl a busstrafikens framkomlighet, trafiksäkerhetssituationen, effekter för köpmännen och olika trafikantgruppers inställning till förändringarna. Detta paper fokuserar på resultaten för busstrafikens framkomlighet samt trafikanternas och affärsinnehavarnas attityder till ombyggnaderna.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 7 No. 1 (2000): Proceedings from the Annual Transport Conference at Aalborg University
TRIM Rejsetid – Nyt trafikledelsessystem på motorveje
Creators: name: Krenk, Finn
name: Wendelboe, Jens Toft
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: Trafikudviklingen de senere år har bevirket, at trafikproblemerne har bredt sig til en større del af motorvejsnettet, bl.a. til Trekantsområdet og Vestfyn. Derfor er der etableret en ny type trafikinformationssystem på motorvejen over Vestfyn, benævnt TRIM Rejsetid. Systemets overordnede formål er at medvirke til bedst mulig udnyttelse af det eksisterende vejnet samt at give trafikanterne den bedst mulige service i form af aktuel information om rejsetider og forsinkelser. Den første etape af systemet evalueres grundigt mht. brugertilfredshed, trafikale effekter og teknisk pålidelighed m.m. TRIM Rejsetid er sat i drift i maj 2004 og formidler information om trafiktilstande, som kendes fra TRIM i Hovedstadsområdet, men som noget nyt også aktuel information om rejsetider, forsinkelser og hastigheder.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Trængselsindikator for biltrafik
Creators: name: Hansen, Christian Overgård
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: I de senere år er trængslen på veje specielt i de store byer blevet betydelig. I et projekt for Trafikministeriet dokumenteres et betydeligt samfundsmæssigt tab i forbindelse med trængsel på vejene. I artiklen beskrives en trængselsindikator, som kan benyttes til at følge udviklingen i trængsel fra år til år. Den baseres på en stikprøve af rejsetidsmålinger, som indsamles ved hjælp af en bilflåde udstyret med GDS. Ved hjælp af empiriske data illustreres med Københavns kommune som eksempel, at der kan opnås en relativ stor nøjagtighed selv med få data.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Udvikling og implementering af målemetode for cyklisters rejse- hastighed
Creators: name: Jensen, Niels
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: Cyklisternes rejsehastighed i København skal forøges med 10%. ”Floating Bike” bruges som målemetode, suppleret med cykling i ”fixed mode”, 20 km/t. Målingerne vil, kombineret med GPS og GIS kunne give oplysning om rejsehastigheden. Der er målt cykelrejsehastigheder på det samme net som bruges til måling af bilhastigheder. Cykeltrafikkens rejsehastighed på bilnettet er 16,5 km/t, mens biltrafikkens hastighed er 28 km/t. Da cykeltrafikken koncentrerer sig på andre veje end biltrafikken er der skræddersyet et nyt referencenet til måling af cykeltrafikkens rejsehastighed. Der er udvalgt strækninger med cykelstier langs større gader, planlagte cykelforbindelser i Middelalderbyen samt en grøn cykelrute. Cykeltrafikkens rejsehastighed på dette net er 14,9 km/t. Projektet vil give Københavns Kommune et redskab til at følge udviklingen i cyklisternes rejsehastighed på et objektivt grundlag. Det vil også give en øget viden om hvilke faktorer, der påvirker cyklisters rejsehastighed og dermed hvilke knapper man kan trykke på for at forbedre cyklisternes rejsehastighed. Rutinemålinger på det endelige referencenet vil blive gennemført i september 2004. Disse målinger vil kunne korrigere det foreløbige resultat, at cyklisternes rejsehastighed i København er 14,9 km/t.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Redskaber til monitorering af trafikken [REMOTE]
Creators: name: Lahrmann, Harry
name: Torp, Kristian
name: Madsen, Jesper Runge
name: Heide, Poul
name: Raguse, Jørgen
name: Juhl, Jens
name: Harms, Lisbeth
name: Hage, Christian
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: GPS data fra kørende biler vil sandsynligvis i fremtiden erstatte traditionelle spoler i vejene som grundlaget for realtidstrafikinformation. I denne artikel beskrives et projekt under EU’s VIKING program, hvor der er udviklet udstyr til indsamling og behandling af GPS data fra kørende biler med henblik på realtidstrafikinformation. Endvidere beskrives et feltforsøg med 10 taxier.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
The Ex Hoc Infrastructure Framework
Creators: name: Hansen, Klaus Marius
name: Kristensen, Lars M.
name: Eskildsen, Toke
name: Nielsen, Kenneth-Daniel
name: Thorup, Rolf E.
name: Fridthjof, Jack
name: Merrild, Ulrik
name: Eskildsen, Jørn
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: New pervasive computing technologies for sensing and communication open up novel possibilities for enhancing traffic safety. We are currently designing and implementing the Ex Hoc infrastructure framework for communication among mobile and stationary units including vehicles. The infrastructure will connect sensing devices on vehicles with sensing devices on other vehicles and with stationary communication units placed alongside roads. The current application of Ex Hoc is to enable the collection and dissemination of information on road condition through LIfe Warning Systems (LIWAS) units.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
An Expeditious Coumarin Synthesis via a “Pseudo-Cycloaddition” Between Salicylaldehydes and Ketene
Creators: name: Sosale Chandrasekhar
name: Honnaiah Vijay Kumar
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Cell Biology
subject: Biological Sciences
subject: Earth and Environmental Sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Biochemistry

description: A variety of salicylaldehydes effected tandem nucleophilic addition onto ketene, leading to corresponding coumarins in good yields under mild conditions. This “pseudo-cycloaddition” represents a very mild variant of the historic Perkin synthesis of coumarin (which remains of key interest in both perfumery and several emerging areas).
Er der forskelle i resultaterne fra VISSIM og DanKap?
Creators: name: Olesen, Søren
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2004

description: Flere og flere er begyndt at anvende trafiksimuleringsprogrammet VISSIM til kapacitets og fremkommelighedsanalyser, da programmet indeholder en lang række funktionaliteter, som ikke har været tilgængelige i de programmer vi tidligere har anvendt i Danmark. VISSIM er et udenlandsk program, som ikke indeholder en specifik opsætning for danske trafikforhold og –kulturer, hvorfor det vil være ønskeligt at få noget viden omkring de resultater VISSIM beregner i forhold til de resultater DanKap beregner. Til at belyse dette vil der i forsommeren 2004 blive gennemført en systematisk sammenligning af beregninger fra de 2 programmer. Sammenligningen vil blive baseret på fiktive beregningseksempler, som både gennemregnes i DanKap og i VISSIM. Ud over at sammenligne resultaterne for de enkelte beregningseksempler vil der også blive fokuseret på, hvilken indflydelse trafikmængderne har på størrelsen af forskellene i resultaterne. Det skyldes, at der i andre sammenhænge er opsat en hypotese om, at DanKap overvurderer kapacitetsproblemerne, når belastningsgraden kommer over 0,85, hvorimod VISSIMs resultater ligger tættere på virkeligheden.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 1 No. 1 (2004): Proceedings from the Annual Transport Conference at Aalborg University
Supply Chain Management på nationalt niveau
Creators: name: Køster, Henrik
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2000

description: Supply Chain Management kan oversættes til "håndtering af forsyningskæden". Det omfatter ikke blot styring af godsflow, men også af informationsstrømme, betaling, ordrehåndtering osv. Begrebet har vundet meget indpas i de seneste år i takt med stigende krav til transportører om just-in-time mv., samtidig med at der er udviklet avancerede IT-løsninger til formålet. Normalt anvendes begrebet af den enkelte virksomhed om det samlede vareflow fra råvare til slutbruger. Man kan imidlertid også betragte Supply Chain Management på nationalt plan, idet man ser på et helt lands transportsystem. Heri indgår elementer som transportpolitik, transportens omkostninger, transporttider, infrastruktur, IT-anvendelse, multimodal transport, spedition, toldbehandling mv. Hermed er det muligt at udarbejde en form for benchmarking, så man kan sammenligne forskellige landes niveau inden for Supply Chain Management. COWI har for Verdensbanken undersøgt en række succesfulde eksempler på Supply Chain Management i "emerging economies" for herigennem at klarlægge årsagerne til landenes succes. I dette paper fokuseres på eksempler fra Estland, der har gennemgået en rivende udvikling siden selvstændigheden i 1991. Indlægget fortæller om Estlands nationale transportstrategi, infrastruktur og logistik, og der gives et par konkrete eksempler på succesrige transportvirksomheder.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 7 No. 1 (2000): Proceedings from the Annual Transport Conference at Aalborg University
Godstransportstatistik - et smertensbarn?
Creators: name: Dagnæs, Lars
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2000

description: Den eksisterende godstransportstatistik på en lang række områder er mangelfuld og på vitale områder direkte misvisende. For Institut for Transportstudier har det således været en udfordring at forbedre belysningen af godstransportsektoren statistisk. Dette skal ses i lyset af, at bedre statistik er vital for kvalitet af såvel forsknings- som udredningsopgaver gennemført på instituttet. I 1996 blev instituttet af transportbranchen opfordret til at komme med forslag til et projekt, som skulle sigte mod at forbedre statistikken om godstransportbranchen. Projektet er foreløbigt gennemført for egne midler. Hertil kommer, at der i forbindelse med at en række af de øvrige gennemførte projekter på instituttet er gennemført delprojekter med sigte på at etablere bedre statistik. Institut for Transportstudier arbejder aktuelt med at udgive en rapport om den danske godstransportsektor belyst statistisk. Rapporten planlægges udgivet efteråret 2000. I indlægget gives en med udgangspunkt i instituttets erfaringer en oversigt over status for godstransportstatistik i Danmark.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 7 No. 1 (2000): Proceedings from the Annual Transport Conference at Aalborg University
City Gods i København
Creators: name: Jensen, Søren B.
Publisher: name: Proceedings from the Annual Transport Conference at Aalborg University
Year: 2000

description: City Gods i København var et 1½ årigt forsøg med transportører til Middelalderbyen i København. I forsøget forpligtede transportørerne sig til at udnytte lastekapaciteten 60% i gennemsnit over 3 mdr. Forsøget bliver grundlaget for en obligatorisk forsøgsordning, som løber fra 2001 til 2003. I dette paper præsenteres resultaterne fra forsøget og transportørernes synspunkter, samt et udkast til mere permanent ordning.
description: Proceedings from the Annual Transport Conference at Aalborg University, Vol. 7 No. 1 (2000): Proceedings from the Annual Transport Conference at Aalborg University