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Sample records for heikkil juha laitila

  1. Longitudinal study of dental caries prevalence and incidence in the rapakivi (high fluoride) and olivine diabase (low fluoride) areas of Laitila, Finland.

    PubMed

    Pärkö, A

    1990-01-01

    This paper is a continuation of the author's study published in 1975. The teeth of the school children included in the study were first examined in 1952, re-examined in 1972 and subsequently at 5-year intervals. Children in the village of Salo had drinking water with a high fluride content and those in the village of Suontaka drank water with a low fluoride content. In the first examination, the Salo children showed a caries prevalence, measured with the DMF inxed, ca. 67% lower than the Suontaka children. With some exceptions, such as the first molars, the absolute differences in caries prevalence between subjects from the two villages had remained practically the same throughout the years. By the 1987 examination, the difference had been reduced, measured with the DMF index, to about 23% and with the DMFS index, to about 28%. In the last 5 years (1982-87), the DMFS index of the Suontaka pupils increased by 2.5 and that of the Salo pupils by 4.1. In the preceding two 5-year periods the increment in each group was ca. 7.0%. PMID:2287611

  2. Synemon ignita sp. nov., a new sun moth species from southern Australia (Lepidoptera, Castniidae).

    PubMed

    Kallies, Axel; Edwards, Ted; Young, Andy; Douglas, Fabian

    2016-01-01

    Sun moths (Castniidae) constitute a family of day-flying moths that due to their slim bodies, broad and often richly coloured wings and clubbed antennae closely resemble butterflies. However, despite this superficial similarity, sun moths are not related to butterflies but belong to the diverse cossoid assemblage of lepidopterous families (Edwards et al. 1998). Until recently, Castniidae were assigned to the superfamily Sesioidea (Minet 1991). A molecular study by Mutanen et al. (2010), however, failed to find support for a close relationship of Sesiidae and Castniidae, resulting in the inclusion of both families in a larger concept of Cossoidea (Nieukerken et al. 2011). In contrast, Heikkil et al. (2015) who added considerable morphological data to DNA, recovered Sesioidea as monophyletic, with Sesiidae, Castniidae and Brachodidae as constituent families, yet with low support values. Thus, although the monophyly of Castniidae is well supported, the systematic position of this family is unresolved. PMID:27394467

  3. Habitat of natural gases in Papua New Guinea

    SciTech Connect

    Schoell, M.; Beeunas, M.A. Baskin, D.K.; Monnier, F.; Eisenberg, L.I.; Valenti, G.L.

    1996-12-31

    Thermogenic natural gases in Papua New Guinea occur in hanging wall anticlines and related structures along a 160 mile section of the Papuan fold and thrust belt between S.E. Hedinia in the SE and Pnyang in the NW. Isotopic compositions of the oil associated gases in the SE between Hedinia and Mananda varies little ({delta}{sup l3}C{sub CH4}=-44{+-}2{per_thousand} and {delta}D{sub CH4}=-200{+-}20{per_thousand}). However, subtle isotopic and compositional patterns in these gases are structurally controlled and indicate primary differences in the filling history of the individual structures. In addition, secondary redistribution of the gases between the Agogo and Iagifu structure can be traced through isotopic similarities. In S.E. Mananda, however, gas isotope patterns are affected by bacterial degradation of the gas. Tire concentration of CO{sub 2} in the oil associated gases in the SE is low (0.6-3.0 %) and the carbon isotope values ({delta}{sup 13}C{sub CO2}=-10 to -19{per_thousand}) suggest an organic origin with minor inorganic contributions. Gas in the Juha structure ({delta}{sup 13}C{sub CH4}=-36.8{per_thousand}) is likely from a more mature source and has a CO{sub 2} concentration of 9.6% with a {delta}{sup 13}C{sub CO2}=-5.9{per_thousand}, indicating additional CO{sub 2} generating processes in this area, likely related to magmatic activity in the vicinity of the Juha structure. The Pnyang structure in the NW of the area holds a gas ({delta}{sup 13}C{sub CH4}-40.5{per_thousand}) which is isotopically intermediate between the Juha gas and the oil associated gases in the SE. The low CO{sub 2} concentration of 0.2% suggests that Pnyang is sourced from a gas kitchen similar to, but more mature than, the kitchen for the oil associated gases in the SE of the province. This is consistent with the high GOR in this structure and the association of the gas with a high API gravity condensate.

  4. Habitat of natural gases in Papua New Guinea

    SciTech Connect

    Schoell, M.; Beeunas, M.A. Baskin, D.K.; Monnier, F. ); Eisenberg, L.I.; Valenti, G.L. )

    1996-01-01

    Thermogenic natural gases in Papua New Guinea occur in hanging wall anticlines and related structures along a 160 mile section of the Papuan fold and thrust belt between S.E. Hedinia in the SE and Pnyang in the NW. Isotopic compositions of the oil associated gases in the SE between Hedinia and Mananda varies little ([delta][sup l3]C[sub CH4]=-44[+-]2[per thousand] and [delta]D[sub CH4]=-200[+-]20[per thousand]). However, subtle isotopic and compositional patterns in these gases are structurally controlled and indicate primary differences in the filling history of the individual structures. In addition, secondary redistribution of the gases between the Agogo and Iagifu structure can be traced through isotopic similarities. In S.E. Mananda, however, gas isotope patterns are affected by bacterial degradation of the gas. Tire concentration of CO[sub 2] in the oil associated gases in the SE is low (0.6-3.0 %) and the carbon isotope values ([delta][sup 13]C[sub CO2]=-10 to -19[per thousand]) suggest an organic origin with minor inorganic contributions. Gas in the Juha structure ([delta][sup 13]C[sub CH4]=-36.8[per thousand]) is likely from a more mature source and has a CO[sub 2] concentration of 9.6% with a [delta][sup 13]C[sub CO2]=-5.9[per thousand], indicating additional CO[sub 2] generating processes in this area, likely related to magmatic activity in the vicinity of the Juha structure. The Pnyang structure in the NW of the area holds a gas ([delta][sup 13]C[sub CH4]-40.5[per thousand]) which is isotopically intermediate between the Juha gas and the oil associated gases in the SE. The low CO[sub 2] concentration of 0.2% suggests that Pnyang is sourced from a gas kitchen similar to, but more mature than, the kitchen for the oil associated gases in the SE of the province. This is consistent with the high GOR in this structure and the association of the gas with a high API gravity condensate.

  5. Oil and gas developments in New Zealand and southwest Pacific islands in 1983

    SciTech Connect

    Katz, H.R.

    1984-10-01

    New Zealand had an increase in exploration activity, particularly drilling. 30,876 m were drilled onshore (up 62%) and 14,034 m offshore. Concession holdings slightly increased offshore (to 230,665 km), but dropped to nearly half onshore (to 34,353 km). Seismic surveys decreased to 477.5 line-km onshore and 1128 km offshore, down 56% and 93%, respectively. Oil, gas, and condensate were found in several wells on small structures close to the recently discovered McKee field. Regular production from McKee began in April 1984, at an initial rate of 1000 BOPD. Production from Kapuni and Maui fields combined was 2,381.313 x 10/sup 6/ m/sup 3/ of gas (up 9.4%) and 845,286 m/sup 3/ of condensate (down 2.3%). Construction of a 1200-MT/day methanol plant, which uses natural gas from these fields, was completed. No exploration was carried out in Tonga, Fiji, Vanuatu, and the Solomon Islands. In Fiji, all prospecting licenses expired, but renewal terms on areas reduced by 50% were agreed on in principle. Papua New Guinea had 4 wells drilled to a combined depth of 9158 m (up 23.2%). The Juha-2X appraisal well confirmed the discovery of gas and condensate in the Juha anticline. In the Gulf of Papua, the offshore appraisal well, Pasca-A3, blew out and was abandoned. The total area of petroleum prospecting licenses slightly increased to 74,715 km. 4 figures, 5 tables.

  6. 10Be in last deglacial climate simulated by ECHAM5-HAM - Part 1: Climatological influences on 10Be deposition

    NASA Astrophysics Data System (ADS)

    Heikkilä, U.; Phipps, S. J.; Smith, A. M.

    2013-07-01

    Be produced has to be deposited by mass conservation. This dominates over any climatic influences on 10Be deposition. Snow concentrations, however, do not follow mass conservation and can potentially be impacted more by climate due to precipitation changes. Quantifying the impact of deglacial climate modulation on 10Be in terms of preserving the solar signal locally is analysed in an accompanying paper (Heikkilä et al., 2013).

  7. 10Be in late deglacial climate simulated by ECHAM5-HAM - Part 1: Climatological influences on 10Be deposition

    NASA Astrophysics Data System (ADS)

    Heikkilä, U.; Phipps, S. J.; Smith, A. M.

    2013-11-01

    concentrations can vary significantly. Averaged over a longer period, all 10Be produced has to be deposited by mass conservation. This dominates over any climatic influences on 10Be deposition. Snow concentrations, however, do not follow mass conservation and can potentially be impacted more by climate due to precipitation changes. Quantifying the impact of deglacial climate modulation on 10Be in terms of preserving the solar signal locally is analysed in an accompanying paper (Heikkilä et al., 10Be in late deglacial climate simulated by ECHAM5-HAM - Part 2: Isolating the solar signal from 10Be deposition).

  8. The orbitozygomatic stich: A technical modification of the lateral supraorbital approach

    PubMed Central

    Lazukova, Miroslava; Andrade-Barazarte, Hugo; Makhamov, Mahkham; Kivelev, Juri; Goehre, Felix; Jahromi, Behnam Rezai; Ibrahim, Tarik F.; Araujo, Ricardo; Lehto, Hanna; Hernesniemi, Juha A.

    2016-01-01

    Background: The lateral supraorbital approach (LSO) provides access to a variety of pathologies including anterior and some posterior circulation aneurysms, sellar and suprasellar lesions, and anterior fossa tumors. Technical modifications of LSO improve the surgical exposure of the skull base. Methods: We retrospectively analyzed 73 consecutive patients treated by the senior author (Juha A. Hernesniemi), at the Department of Neurosurgery, Helsinki University Hospital in Helsinki, Finland from May 2013 to October 2013. This study cohort underwent a modified LSO to access anterior circulation aneurysms, sellar and suprasellar tumors, and anterior fossa tumors. The studied population comprised 30 men and 43 women, with a mean age at treatment of 54 years (9–83 years). Results: LSO was successfully used to access anterior circulation aneurysms in 59 (81%) patients, 10 (14%) patients with anterior cranial fossa tumors, and 4 (5%) patients with suprasellar tumors. The skull base drilling provided a mean of 6.8 mm (1.7–22 mm) in increased exposure. Conclusion: LSO provides adequate access to vascular and neoplastic lesions of the anterior cranial fossa, by drilling approximately 6.8 mm (1.7–22 mm) of the lateral orbital wall and sphenoid wing. This enhances surgical exposure and trajectory. An additional trick while performing an LSO is to place a single or multiple stiches (orbitozygomatic stich) at the base of the dura once opened, eliminating the dead space between the dura and anterior skull base. PMID:27168949

  9. Integration of atomic layer deposited nanolaminates on silicon waveguides (Conference Presentation)

    NASA Astrophysics Data System (ADS)

    Autere, Anton; Karvonen, Lasse; Säynätjoki, Antti; Roussey, Matthieu; Roenn, John; Färm, Elina; Kemell, Marianna; Tu, Xiaoguang; Liow, Tsung-Yang; Lo, Patrick; Ritala, Mikko; Leskelä, Markku; Lipsanen, Harri; Honkanen, Seppo; Sun, Zhipei

    2016-05-01

    waveguides and show signal enhancement. Our results show that atomic layer deposited nanolaminates can potentially open new possibilities for various photonic applications, such as silicon photonic devices for light emission and amplification, optical sensing and all-optical signal processing. References [1] A. Autere, L. Karvonen, A. Säynätjoki, M. Roussey, E. Färm, M. Kemell, X. Tu, T.Y. Liow, G.Q. Lo, M. Ritala, M. Leskelä, S. Honkanen, H. Lipsanen, and Z. Sun, "Slot waveguide ring resonators coated by an atomic layer deposited organic/inorganic nanolaminate," Opt. Express 23, 26940-26951 (2015) [2] L. D. Salmi, E. Puukilainen, M. Vehkamäki, M. Heikkilä, and M. Ritala, "Atomic layer deposition of Ta2O5/polyimide nanolaminates," Chem. Vap. Deposition 15, 221-226 (2009). [3] S. Morino, T. Yamashita, K. Horie, T. Wada, and H. Sasabe, "Third-order nonlinear optical properties of aromatic polyisoimides," React. Funct. Polym. 44, 183-188 (2000). [4] C.-Y. Tai, J. Wilkinson, N. Perney, M. Netti, F. Cattaneo, C. Finlayson, and J. Baumberg, "Determination of nonlinear refractive index in a Ta2O5 rib waveguide using self-phase modulation," Opt. Express 12, 5110-5116 (2004).

  10. Structure of Papuan foldbelt, emerging hydrocarbon province in Papua New Guinea

    SciTech Connect

    Hill, K.C.

    1987-05-01

    The 500-km long, northwest-southeast-trending, Mio-Pliocene foldbelt of west-central Papua New Guinea is part of an extensive 2000-3000-m high mountain belt through New Guinea that is similar in structural style to the Canadian Rockies. The southwesterly thrust-faulted sediments of the foldbelt are bound to the northeast by major sinistral wrench faults, with allochthonous metamorphic terranes to the north. The sedimentary section comprises 3-4 km of Mesozoic clastics, containing the main hydrocarbon reservoir, overlain by 1-1.5 km of Tertiary limestone. The northeast two-thirds of the foldbelt has a Tertiary limestone duplex at surface and, by inference, Mesozoic duplex(es) beneath, with 70+ km of shortening. In the southwest foldbelt, there is considerable inversion of preexisting extensional faults and the limestone duplex is absent, implying deeper detachment. Shortening in the southwest was approximately 20 km. Along strike, the foldbelt is divided into three segments by major regional lateral ramps. These ramps connect areas with different basal detachments, particularly in the southwest. The northwest segment decollement is 10-12 km into basement along the mid-crustal detachment. The resultant 200-km long Mueller anticline exposes basement in the core and is prospective for hydrocarbons in the parasitic structures, such as the Juha gas-condensate field. The central segment prospective structures, such as the Mananda and Hides anticlines, are detached just above basement such that the entire sedimentary section is repeated. The southeast segment detachment is within the Mesozoic, but the structures, such as the Iagifu oil field, involve the sandstone reservoir and are prospective.

  11. Oil and gas developments in New Zealand and southwest Pacific islands in 1987

    SciTech Connect

    Cahill, J.P.; Katz, H.R.

    1988-10-01

    In New Zealand, 14 new licenses were granted: 6 in the East Coast region, 6 offshore Taranaki, and 2 in the South Island. Two licenses were relinquished, and the onshore Taranaki license held by petrocorp expired. Onshore seismic activity totaled 525 km; offshore seismic activity totaled 3,221 km (reconnaissance seismic surveys by TCPL accounted for much of the offshore activity). Drilling decreased slightly, with 18 wells drilled (13 onshore and 5 offshore) total 55,203 m. The drilling of Kora-1 on a volcanic structure in the North Taranaki basin has led to speculation about a possible oil discovery. Total petroleum production remained steady at 4,360 million m/sup 3/ of gas, 1,127 thousand m/sup 3/ of condensate, 190 thousand m/sup 3/ of LPG, and 509 thousand m/sup 3/ of oil. In Papua New Guinea, further discoveries in the overthrust belt of the Papuan basin have confirmed the highly prospective nature of this area. A major gas and condensate field with 4 pay zones was established in the Hides structure east of Juha field, and early in 1988 gas, condensate, and oil were found in the Hedinia structure south of the Iagifu oil field discovered in 1986. Total drilling amounted to 15,725.55 m during 1987. Seismic surveys covered 858 km onshore and 4,747 km offshore. There are 36 active Petroleum Prospecting Licenses: 32 in the Papuan basin and 4 in the North New Guinea basin. No new developments were reported in Solomon Islands, Tonga, and Vanuatu. 2 figs., 6 tabs.

  12. 8th International Special Session on Current Trends in Numerical Simulation for Parallel Engineering Environments

    SciTech Connect

    Trinitis, C; Bader, M; Schulz, M

    2009-06-09

    In today's world, the use of parallel programming and architectures is essential for simulating practical problems in engineering and related disciplines. Significant progress in CPU architecture (multi- and many-core CPUs, SMT, transactional memory, virtualization support, shared caches etc.) system scalability, and interconnect technology, continues to provide new opportunities, as well as new challenges for both system architects and software developers. These trends are paralleled by progress in algorithms, simulation techniques, and software integration from multiple disciplines. In its 8th year, ParSim continues to build a bridge between application disciplines and computer science and to help fostering closer cooperations between these fields. Since its successful introduction in 2002, ParSim has established itself as an integral part of the EuroPVM/MPI conference series. In contrast to traditional conferences, emphasis is put on the presentation of up-to-date results with a short turn-around time. We believe that this offers a unique opportunity to present new aspects in this dynamic field and discuss them with a wide, interdisciplinary audience. The EuroPVM/MPI conference series, as one of the prime events in parallel computation, serves as an ideal surrounding for ParSim. This combination enables participants to present and discuss their work within the scope of both the session and the host conference. This year, five papers from authors in five countries were submitted to Par-Sim, and we selected three of them. They cover a range of different application fields including mechanical engineering, material science, and structural engineering simulations. We are confident that this resulted in an attractive special session and that this will be an informal setting for lively discussions as well as for fostering new collaborations. Several people contributed to this event. Thanks go to Jack Dongarra, the EuroPVM/MPI general chair, and to Jan Westerholm, Juha

  13. Extreme weather impacts on European networks of transport

    NASA Astrophysics Data System (ADS)

    Leviakangas, P.

    2012-04-01

    : Pekka Leviäkangas, Anu Tuominen, Riitta Molarius, Heta Kojo, Jari Schabel, Sirra Toivonen, Jaana Keränen, Johanna Ludvigsen, Andrea Vajda, Heikki Tuomenvirta, Ilkka Juga, Pertti Nurmi, Jenni Rauhala, Frank Rehm, Thomas Gerz, Thorsten Muehlhausen, Juha Schweighofer, Silas Michaelides, Matheos Papadakis, Nikolai Dotzek (†), Pieter Groenemeijer.

  14. Snow Water Equivalent Retrieval By Markov Chain Monte Carlo Based on Memls and Hut Snow Emission Model

    NASA Astrophysics Data System (ADS)

    Pan, J.; Durand, M. T.; Vanderjagt, B. J.

    2014-12-01

    The Markov chain Monte Carlo (MCMC) method had been proved to be successful in snow water equivalent retrieval based on synthetic point-scale passive microwave brightness temperature (TB) observations. This method needs only general prior information about distribution of snow parameters, and could estimate layered snow properties, including the thickness, temperature, density and snow grain size (or exponential correlation length) of each layer. In this study, the multi-layer HUT (Helsinki University of Technology) model and the MEMLS (Microwave Emission Model of Layered Snowpacks) will be used as observation models to assimilate the observed TB into snow parameter prediction. Previous studies had shown that the multi-layer HUT model tends to underestimate TB at 37 GHz for deep snow, while the MEMLS does not show sensitivity of model bias to snow depth. Therefore, results using HUT model and MEMLS will be compared to see how the observation model will influence the retrieval of snow parameters. The radiometric measurements at 10.65, 18.7, 36.5 and 90 GHz at Sodankyla, Finland will be used as MCMC input, and the statistics of all snow property measurement will be used to calculate the prior information. 43 dry snowpits with complete measurements of all snow parameters will be used for validation. The entire dataset are from NorSREx (Nordic Snow Radar Experiment) experiments carried out by Juha Lemmetyinen, Anna Kontu and Jouni Pulliainen in FMI in 2009-2011 winters, and continued two more winters from 2011 to Spring of 2013. Besides the snow thickness and snow density that are directly related to snow water equivalent, other parameters will be compared with observations, too. For thin snow, the previous studies showed that influence of underlying soil is considerable, especially when the soil is half frozen with part of unfrozen liquid water and part of ice. Therefore, this study will also try to employ a simple frozen soil permittivity model to improve the

  15. FOREWORD: The 70th birthday of Professor Stig Stenholm The 70th birthday of Professor Stig Stenholm

    NASA Astrophysics Data System (ADS)

    Suominen, Kalle-Antti

    2010-09-01

    It is not easy to assess, or even to describe correctly a long and distinguished career that started about the time when I was born. In 1964 Stig Stenholm got both an engineering degree at the Helsinki University of Technology (HUT), and an MSc degree (in Mathematics) at the University of Helsinki. The two degrees demonstrate Stig's ability to understand both complex mathematics and experimental physics. Statistical physics or rather, quantum liquids, was the field in which Stig got his DPhil at Oxford in 1967, under the guidance of Dirk ter Haar. It is interesting that together they worked on studying fermions in a bosonic background [1]; at the time this meant, of course, 3He atoms as impurities in 4He liquid, but nowadays one would immediately connect such systems to the physics of cold atomic gases. The postdoctoral period in 1967-1968 at Yale University brought Stig in contact with Willis Lamb and laser physics [2]. Back in Finland, Stig's career in the 1970s was dominated by theoretical studies of gas lasers, especially pressure and collision effects on spectral lines and saturation spectroscopy, together with his first PhD student, Rainer Salomaa. A professorship at the University of Helsinki came in 1974, and in 1980 an important era started as Stig became the scientific director of the Research Institute for Theoretical Physics (TFT). At that time he also developed the semiclassical theory of laser cooling especially with Juha Javanainen. The laser spectroscopy work led to a textbook in 1984 [3], and the semiclassical laser cooling theory was summarized in a review article in 1986 [4]. These were not, of course, his only interests, as he also worked on free-electron lasers, ring-laser gyroscopes, multiphoton processes and quantum amplifiers. In an article written in 1990 in honour of Olli Lounasmaa [5], the founder of the famous Low Temperature Laboratory at HUT, Stig mentions that one of his most memorable achievements was acting as a bridge between the

  16. FOREWORD: The 70th birthday of Professor Stig Stenholm The 70th birthday of Professor Stig Stenholm

    NASA Astrophysics Data System (ADS)

    Suominen, Kalle-Antti

    2010-09-01

    It is not easy to assess, or even to describe correctly a long and distinguished career that started about the time when I was born. In 1964 Stig Stenholm got both an engineering degree at the Helsinki University of Technology (HUT), and an MSc degree (in Mathematics) at the University of Helsinki. The two degrees demonstrate Stig's ability to understand both complex mathematics and experimental physics. Statistical physics or rather, quantum liquids, was the field in which Stig got his DPhil at Oxford in 1967, under the guidance of Dirk ter Haar. It is interesting that together they worked on studying fermions in a bosonic background [1]; at the time this meant, of course, 3He atoms as impurities in 4He liquid, but nowadays one would immediately connect such systems to the physics of cold atomic gases. The postdoctoral period in 1967-1968 at Yale University brought Stig in contact with Willis Lamb and laser physics [2]. Back in Finland, Stig's career in the 1970s was dominated by theoretical studies of gas lasers, especially pressure and collision effects on spectral lines and saturation spectroscopy, together with his first PhD student, Rainer Salomaa. A professorship at the University of Helsinki came in 1974, and in 1980 an important era started as Stig became the scientific director of the Research Institute for Theoretical Physics (TFT). At that time he also developed the semiclassical theory of laser cooling especially with Juha Javanainen. The laser spectroscopy work led to a textbook in 1984 [3], and the semiclassical laser cooling theory was summarized in a review article in 1986 [4]. These were not, of course, his only interests, as he also worked on free-electron lasers, ring-laser gyroscopes, multiphoton processes and quantum amplifiers. In an article written in 1990 in honour of Olli Lounasmaa [5], the founder of the famous Low Temperature Laboratory at HUT, Stig mentions that one of his most memorable achievements was acting as a bridge between the

  17. Feeding the Monster

    NASA Astrophysics Data System (ADS)

    2005-10-01

    central network of filamentary structures spiralling down to the centre. "Our analysis of the VLT/NACO images of NGC 1097 shows that these filaments end up at the very centre of the galaxy", says co-author Juha Reunanen from ESO. "This network closely resembles those seen in computer models", adds co-worker Witold Maciejewski from the University of Oxford, UK. "The nuclear filaments revealed in the NACO images are the tracers of cold dust and gas being channelled towards the centre to eventually ignite the AGN." The astronomers also note that the curling of the spiral pattern in the innermost 300 light-years seem indeed to confirm the presence of a super-massive black hole in the centre of NGC 1097. Such a black hole in the centre of a galaxy causes the nuclear spiral to wind up as it approaches the centre, while in its absence the spiral would be unwinding as it moves closer to the centre. An image of NGC 1097 and its small companion, NGC 1097A, was taken in December 2004, in the presence of Chilean President Lagos with the VIMOS instrument on ESO's Very Large Telescope (VLT). It is available as ESO PR Photo 35d/04. More information This ESO Press Photo is based on research published in the October issue of Astronomical Journal, vol. 130, p. 1472 ("Feeding the Monster: The Nucleus of NGC 1097 at Subarcsecond Scales in the Infrared with the Very Large Telescope", by M. Almudena Prieto, Witold Maciejewski, and Juha Reunanen).

  18. The Effect of Pollution on Newly-Formed Particle Composition in Boreal Forest

    NASA Astrophysics Data System (ADS)

    Vaattovaara, Petri

    2010-05-01

    Petri Vaattovaara (1), Tuukka Petäjä (2), Jorma Joutsensaari (1), Pasi Miettinen (1), Boris Zaprudin (1,6), Aki Kortelainen (1), Juha Heijari (3,7), Pasi Yli-Pirilä (3), Pasi Aalto (2), Doug R. Worsnop (4), and Ari Laaksonen(1,5) (1) University of Eastern Finland, Finland (2) University of Helsinki, Finland (3) University of Eastern Finland, Finland (4) Aerodyne Research Inc., USA (5) Finnish Meteorological Institute, Finland (6) Currently at University of Turku, Finland (7) Currently at Maritime Research Centre, Finland Email address of the Corresponding author: Petri.Vaattovaara@uef.fi The geographical extent of the tropical, temperate and boreal forests is about 30% of the Earth's land surface. Those forests are located around the world in different climate zones effecting widely on atmospheric composition via new particle formation. The Boreal forests solely cover one third of the forests extent and are one of the largest vegetation environments, forming a circumpolar band throughout the northern hemisphere continents, with a high potential to affect climate processes [1]. In order to more fully understand the possible climatic effects of the forests, the properties of secondary organic aerosols (SOA) in varying conditions (e.g. a change in meteorological parameters or in the concentrations of biogenic and antropogenic trace gases) need to be better known. In this study, we applied the UFO-TDMA (ultrafine organic tandem differential mobility analyzer [2]) and the UFH-TDMA (ultrafine hygroscopicity tandem differential mobility analyzer [3]) methods parallel to shed light on the evolution of the nucleation and Aitken mode particle compositions (via physic-chemical properties) at a virgin boreal forest site in varying conditions. The measurements were carried out at Hyytiälä forest station in Northern Europe (Finland) during 15 spring nucleation events. We also carried out a statistical analysis using linear correlations in order to explain the variability in

  19. CALL FOR PAPERS: Special issue on Renormalization Group 2005

    NASA Astrophysics Data System (ADS)

    Honkonen, Juha; Kazakov, Dmitri; Diehl, Hans Werner

    2005-10-01

    This is a call for contributions to a special issue of Journal of Physics A: Mathematical and General dedicated to the subject of the Renormalization Group as featured in the international workshop Renormalization Group 2005, Helsinki, Finland 30 August-3 September 2005 (http://theory.physics.helsinki.fi/~rg2005/). Participants at that meeting as well as other researchers working in the field are invited to submit a research paper to this issue. The Editorial Board has invited Juha Honkonen, Dmitri Kazakov and Hans Werner Diehl to serve as Guest Editors for the special issue. Their criteria for acceptance of contributions are as follows: The subject of the paper should relate to the subject of the workshop. Contributions will be refereed and processed according to the usual procedure of the journal. Conference papers may be based on already published work but should eithercontain significant additional new results and/or insights orgive a survey of the present state of the art, a critical assessment of the present understanding of a topic, and a discussion of open problems Papers submitted by non-participants should be original and contain substantial new results. The guidelines for the preparation of contributions are as follows: The DEADLINE for submission of contributions is 1 December 2005. This deadline will allow the special issue to appear in June 2006. There is a nominal page limit of 16 printed pages per contribution. For papers exceeding this limit, the Guest Editors reserve the right to request a reduction in length. Further advice on publishing your work in Journal of Physics A: Mathematical and General may be found at www.iop.org/Journals/jphysa. Contributions to the special issue should, if possible, be submitted electronically by web upload at www.iop.org/Journals/jphysa or by e-mail to jphysa@iop.org, quoting `JPhysA Special Issue—Renormalization Group 2005'. Submissions should ideally be in standard LaTeX form. Please see the web site for further

  20. SINFONI Opens with Upbeat Chords

    NASA Astrophysics Data System (ADS)

    2004-08-01

    the development of SINFONI for nearly 7 years. Some of the members of the Commissioning Teams are depicted in PR Photos 24g/04 and 24h/04; in addition to the SPIFFI team members present on the second photo, Walter Bornemann, Reinhard Genzel, Hans Gemperlein, Stefan Huber have also been working on the reintegration/commissioning in Paranal. Notes [1] This press release is issued in coordination between ESO, the Max-Planck-Institute for Extraterrestrial Physics (MPE) in Garching, Germany, and the Nederlandse Onderzoekschool Voor Astronomie in Leiden, The Netherlands. A German version is available at http://www.mpg.de/bilderBerichteDokumente/dokumentation/pressemitteilungen/2004/pressemitteilung20040824/index.html and a Dutch version at http://www.astronomy.nl/inhoud/pers/persberichten/30_08_04.html. [2] The SINFONI team consists of Roberto Abuter, Andrew Baker, Walter Bornemann, Ric Davies, Frank Eisenhauer (SPIFFI Principal Investigator), Hans Gemperlein, Reinhard Genzel (MPE Director), Andrea Gilbert, Armin Goldbrunner, Matthew Horrobin, Stefan Huber, Christof Iserlohe, Matthew Lehnert, Werner Lieb, Dieter Lutz, Nicole Nesvadba, Claudia Röhrle, Jürgen Schreiber, Linda Tacconi, Matthias Tecza, Niranjan Thatte, Harald Weisz (Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany), Anthony Brown, Paul van der Werf (NOVA, Leiden, The Netherlands), Eddy Elswijk, Johan Pragt, Jan Kragt, Gabby Kroes, Ton Schoenmaker, Rik ter Horst (ASTRON, Dwingeloo, The Netherlands), Henri Bonnet (SINFONI Project Manager), Roberto Castillo, Ralf Conzelmann, Romuald Damster, Bernard Delabre, Christophe Dupuy, Robert Donaldson, Christophe Dumas, Enrico Fedrigo, Gert Finger, Gordon Gillet, Norbert Hubin (Head of Adaptive Optics Dept.), Andreas Kaufer, Franz Koch, Johann Kolb, Andrea Modigliani, Guy Monnet (Head of Telescope Systems Division), Chris Lidman, Jochen Liske, Jean Louis Lizon, Markus Kissler-Patig (SINFONI Instrument Scientist), Jerome Paufique, Juha Reunanen