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  1. AU="J. Walden"
  2. AU="Fowden, Abigail L"
  3. AU="Clemens, Roger A."
  4. AU="Lee, Jacky Kwan Ho"
  5. AU="Margaret Greenwood-Ericksen"
  6. AU=Chang Yuan
  7. AU="Cervantes, Paige E"
  8. AU="Tankova, T"
  9. AU="Callegari, Rachel A"
  10. AU=Wang Yan AU=Wang Yan
  11. AU=Hassan Md Imtaiyaz
  12. AU="Galgani, Alessandro"
  13. AU="Yoshimura, Katsuhiro"
  14. AU=Periyasamy Petrick AU=Periyasamy Petrick
  15. AU="Lockey, David"
  16. AU="Gibson, G G"
  17. AU="K. Danzmann"

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  1. Artikel ; Online: Long-Term Opioid Therapy for Chronic Pain.

    Retan, J Walden

    Annals of internal medicine

    2015  Band 163, Heft 2, Seite(n) 147–148

    Mesh-Begriff(e) Analgesics, Opioid/administration & dosage ; Analgesics, Opioid/adverse effects ; Chronic Pain/drug therapy ; Humans
    Chemische Substanzen Analgesics, Opioid
    Sprache Englisch
    Erscheinungsdatum 2015-07-21
    Erscheinungsland United States
    Dokumenttyp Comment ; Letter
    ZDB-ID 336-0
    ISSN 1539-3704 ; 0003-4819
    ISSN (online) 1539-3704
    ISSN 0003-4819
    DOI 10.7326/L15-5109-2
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Verfügbar in ZB MED Köln/Königswinter

    Ua VI Zs.178/2: Hefte anzeigen Standort:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  2. Artikel ; Online: Prescription drug abuse.

    Retan, J Walden

    Annals of internal medicine

    2014  Band 161, Heft 4, Seite(n) 305–306

    Mesh-Begriff(e) Health Policy ; Humans ; Physician's Role ; Prescription Drug Misuse/prevention & control ; Substance-Related Disorders/prevention & control
    Sprache Englisch
    Erscheinungsdatum 2014-08-19
    Erscheinungsland United States
    Dokumenttyp Comment ; Letter
    ZDB-ID 336-0
    ISSN 1539-3704 ; 0003-4819
    ISSN (online) 1539-3704
    ISSN 0003-4819
    DOI 10.7326/L14-5016-4
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Verfügbar in ZB MED Köln/Königswinter

    Ua VI Zs.178/2: Hefte anzeigen Standort:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  3. Artikel ; Online: Measurement report

    J. Walden / L. Pirjola / T. Laurila / J. Hatakka / H. Pettersson / T. Walden / J.-P. Jalkanen / H. Nordlund / T. Truuts / M. Meretoja / K. K. Kahma

    Atmospheric Chemistry and Physics, Vol 21, Pp 18175-

    Characterization of uncertainties in fluxes and fuel sulfur content from ship emissions in the Baltic Sea

    2021  Band 18194

    Abstract: Fluxes of gaseous compounds and nanoparticles were studied using micrometeorological methods at Harmaja in the Baltic Sea. The measurement site was situated beside the ship route to and from the city of Helsinki. The gradient (GR) method was used to ... ...

    Abstract Fluxes of gaseous compounds and nanoparticles were studied using micrometeorological methods at Harmaja in the Baltic Sea. The measurement site was situated beside the ship route to and from the city of Helsinki. The gradient (GR) method was used to measure fluxes of SO 2 , NO, NO 2 , O 3 , CO 2 , and N tot (the number concentration of nanoparticles). In addition, the flux of CO 2 was also measured using the eddy-covariance (EC) method. Distortion of the flow field caused by obstacles around the measurement mast was studied by applying a computation fluid dynamic (CFD) model. This was used to establish the corresponding heights in the undisturbed stream. The wind speed and the turbulent parameters at each of the established heights were then recalculated for the gradient model. The effect of waves on the boundary layer was taken into consideration, as the Monin–Obukhov theory used to calculate the fluxes is not valid in the presence of swell. Uncertainty budgets for the measurement systems were constructed to judge the reliability of the results. No clear fluxes across the air–sea nor the sea–air interface were observed for SO 2 , NO, NO 2 , NO x (= NO + NO 2 ), O 3 , or CO 2 using the GR method. A negative flux was observed for N tot , with a median value of −0.23 × 10 9 m −2 s −1 and an uncertainty range of 31 %–41 %. For CO 2 , while both positive and negative fluxes were observed, the median value was −0.081 μmol m −2 s −1 with an uncertainty range of 30 %–60 % for the EC methods. Ship emissions were responsible for the deposition of N tot , while they had a minor effect on CO 2 deposition. The fuel sulfur content (FSC) of the marine fuel used in ships passing the site was determined from the observed ratio of the SO 2 and CO 2 concentrations. A typical value of 0.40 ± 0.06 % was obtained for the FSC, which is in compliance with the contemporary FSC limit value of 1 % in the Baltic Sea area at the time of measurements. The method to estimate the uncertainty in the FSC was found to be accurate enough for use ...
    Schlagwörter Physics ; QC1-999 ; Chemistry ; QD1-999
    Thema/Rubrik (Code) 290
    Sprache Englisch
    Erscheinungsdatum 2021-12-01T00:00:00Z
    Verlag Copernicus Publications
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

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  4. Artikel ; Online: Mobile measurements of ship emissions in two harbour areas in Finland

    L. Pirjola / A. Pajunoja / J. Walden / J.-P. Jalkanen / T. Rönkkö / A. Kousa / T. Koskentalo

    Atmospheric Measurement Techniques, Vol 7, Iss 1, Pp 149-

    2014  Band 161

    Abstract: Four measurement campaigns were performed in two different environments – inside the harbour areas in the city centre of Helsinki, and along the narrow shipping channel near the city of Turku, Finland – using a mobile laboratory van during winter and ... ...

    Abstract Four measurement campaigns were performed in two different environments – inside the harbour areas in the city centre of Helsinki, and along the narrow shipping channel near the city of Turku, Finland – using a mobile laboratory van during winter and summer conditions in 2010–2011. The characteristics of gaseous (CO, CO 2 , SO 2 , NO, NO 2 , NO x ) and particulate (number and volume size distributions as well as PM 2.5 ) emissions for 11 ships regularly operating on the Baltic Sea were studied to determine the emission parameters. The highest particle concentrations were 1.5 × 10 6 and 1.6 × 10 5 cm −3 in Helsinki and Turku, respectively, and the particle number size distributions had two modes. The dominating mode peaked at 20–30 nm, and the accumulation mode at 80–100 nm. The majority of the particle mass was volatile, since after heating the sample to 265 °C, the particle volume of the studied ship decreased by around 70%. The emission factors for NO x varied in the range of 25–100 g (kg fuel) −1 , for SO 2 in the range of 2.5–17.0 g (kg fuel) −1 , for particle number in the range of (0.32–2.26) × 10 16 # (kg fuel) −1 , and for PM 2.5 between 1.0–4.9 g (kg fuel) −1 . The ships equipped with SCR (selective catalytic reduction) had the lowest NO x emissions, whereas the ships with DWI (direct water injection) and HAMs (humid air motors) had the lowest SO 2 emissions but the highest particulate emissions. For all ships, the averaged fuel sulphur contents (FSCs) were less than 1% (by mass) but none of them was below 0.1% which will be the new EU directive starting 1 January 2015 in the SO x emission control areas; this indicates that ships operating on the Baltic Sea will face large challenges.
    Schlagwörter Meteorology. Climatology ; QC851-999 ; Physics ; QC1-999 ; Science ; Q ; DOAJ:Meteorology and Climatology ; DOAJ:Earth and Environmental Sciences ; Environmental engineering ; TA170-171 ; Earthwork. Foundations ; TA715-787
    Thema/Rubrik (Code) 333
    Sprache Englisch
    Erscheinungsdatum 2014-01-01T00:00:00Z
    Verlag Copernicus Publications
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

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  5. Artikel ; Online: Mobile measurements of ship emissions in two harbour areas in Finland

    L. Pirjola / A. Pajunoja / J. Walden / J.-P. Jalkanen / T. Rönkkö / A. Kousa / T. Koskentalo

    Atmospheric Measurement Techniques Discussions, Vol 6, Iss 4, Pp 7149-

    2013  Band 7184

    Abstract: Four measurement campaigns by a mobile laboratory van were performed in two different environments; inside the harbour areas in the city center of Helsinki and along the narrow shipping channel near the city of Turku, Finland, during the winter and ... ...

    Abstract Four measurement campaigns by a mobile laboratory van were performed in two different environments; inside the harbour areas in the city center of Helsinki and along the narrow shipping channel near the city of Turku, Finland, during the winter and summer conditions in 2010–2011. The characteristics of gaseous (CO, CO 2 , SO 2 , NO, NO 2 , NO x ) and particulate (number and volume size distributions as well as PM 2.5 ) emissions for 11 ships regularly operating on the Baltic Sea were studied to determine the emission parameters. The highest particle concentrations were 1.5 × 10 6 and 1.6 × 10 5 cm −3 in Helsinki and Turku, respectively, and the particle number size distributions had two modes. The dominating mode was peaking at 20–30 nm and the accumulation mode at 80–100 nm. The majority of the particle mass was volatile since after heating the sample to 265 °C, the particle volume of the studied ships decreased by around 70%. The emission factors for NO x varied in the range of 25–100 g (kg fuel) −1 , for SO 2 in the range of 2.5–17.0 g (kg fuel) −1 , for particle number in the range of (0.32–2.26) × 10 16 particles (kg fuel) −1 , and for PM 2.5 between 1.0–4.9 g (kg fuel) −1 . The ships equipped with SCR had lowest NO x emissions whereas the ships with DWI and HAM had lowest SO 2 emissions but highest particulate emissions. For all ships the averaged fuel sulphur contents (FSCs) were less than 1% (by mass) but none of those was below 0.1% which will be the new EU directive from 1 January 2015 in the SO x Emission Control Areas, indicating big challenges for ships operating on the Baltic Sea.
    Schlagwörter Meteorology. Climatology ; QC851-999 ; Physics ; QC1-999 ; Science ; Q ; DOAJ:Meteorology and Climatology ; DOAJ:Earth and Environmental Sciences ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Earthwork. Foundations ; TA715-787
    Thema/Rubrik (Code) 333
    Sprache Englisch
    Erscheinungsdatum 2013-08-01T00:00:00Z
    Verlag Copernicus Publications
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  6. Artikel ; Online: Fingerprinting of bed sediment in the Tay Estuary, Scotland

    P. A. Jenkins / R. W. Duck / J. S. Rowan / J. Walden

    Hydrology and Earth System Sciences, Vol 6, Iss 6, Pp 1007-

    an environmental magnetism approach

    2002  Band 1016

    Abstract: Sediment fingerprinting is commonly used for sediment provenance studies in lakes, rivers and reservoirs and on hillslopes and floodplains. This investigation explores the mixing of terrestrial and marine-derived sediment in the Tay Estuary, Scotland, ... ...

    Abstract Sediment fingerprinting is commonly used for sediment provenance studies in lakes, rivers and reservoirs and on hillslopes and floodplains. This investigation explores the mixing of terrestrial and marine-derived sediment in the Tay Estuary, Scotland, using mineral magnetic attributes for fingerprinting. Samples representative of the estuary sediments and of four sources (end-members) were subjected to a suite of magnetic susceptibility and remanence measurements. Sediment samples from the beds of the Rivers Tay and Earn represented fluvial inputs while samples from the Angus and Fife coasts represented marine input. Multivariate discriminant and factor analysis showed that the sources could be separated on the basis of six magnetic parameters in a simple multivariate unmixing model to identify source contributions to estuarine bed sediments. Multi-domain magnetite signatures, characteristic of unweathered bedrock, dominate the magnetic measurements. Overall contributions of 3% from the River Earn, 17% from the River Tay, 29% from the Angus coast and 51% from the Fife coast source end-members, demonstrated the present-day regime of marine sediment derivation in the Tay Estuary. However, this conceals considerable spatial variability both along-estuary and in terms of sub-environments, with small-scale variations in sediment provenance reflecting local morphology, particularly areas of channel convergence. Keywords: bed sediment, environmental magnetism, fingerprinting, Tay Estuary, Scotland
    Schlagwörter Technology ; T ; Environmental technology. Sanitary engineering ; TD1-1066 ; Geography. Anthropology. Recreation ; G ; Environmental sciences ; GE1-350
    Sprache Englisch
    Erscheinungsdatum 2002-01-01T00:00:00Z
    Verlag Copernicus Publications
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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