629 research outputs found
The Marchenko-Ostrovski mapping and the trace formula for the Camassa-Holm equation
No full textWe consider the periodic weighted operator Ty---- _p-2(p2y,), q_ p-4 in L2(l,p2dx) where p is a 1-periodic positive function satisfying q -- p/p C L2(0, 1). The spec- trum of T consists of intervals separated by gaps. In the first part of the paper we construct the Marchenko-Ostrovski mapping q --> h(q) and solve the corresponding inverse problem. For our approach it is essential that the mapping h has the factoriza- tion h(q) = h(V(q)), where q --> V(q) is a certain nonlinear mapping and V --> h(V) is the Marchenko-Ostrovski mapping for the Hill operator. In the second part of this paper we derive the trace formula for T in the case q C L2(0, 1)
The problem of access to the results of covert investigative (detective) actions: the ECtHR case-law overview and national aspect of the issue
No full textHloviuk I. V. The problem of access to the results of covert investigative (detective) actions: the ECtHR case-law overview and national aspect of the issue / I. V. Hloviuk, T. Yu. Marchenko // ECHR’s Jurisprudence in Digital Era : proceedings of the Int. sci. conf. (Odesa, May 31 – June 1, 2019) / MES of Ukraine, Nat. Univ. “Odes. Acad. of Law”, SRC NALSU ; exec. eds. H. A. Ulianova, V. A. Tuliakov. – Odesa : Publishing house “Helvetika”, 2019. – P. 176-179
Gamasiphis ochotensis Marchenko, 2013, sp. n.
No full textGamasiphis ochotensis sp. n. Diagnosis of adults (female and male). Anteromedial extension of epistome aciculate; all idiosomal setae aciculate; podonotal region of dorsal shield with 23 pairs of setae; opisthonotal region with 12 pairs of setae; seta j 4 about 0.9 times as long as distance between its base and base of j 5; seta z 6 about as long as j 6; setae s 3 and s 6 about 0.3 times as long as s 5; seta j 6 about 0.7 times as long as distance between its base and base of J 2; four pairs of J setae; two pairs of pre-sternal platelets; ventrianal shield with eight pairs of setae in addition to circum-anal setae (Jv 1 - Jv 5, Zv 1 - Zv 3); seta Zv 2 about 0.8 times as long as distance between its base and base of Zv 3; seta Jv 5 about 5 times as long as circum-anal setae; setae Jv 3 inserted at the level of unsclerotized line which partly separates the dorsal and ventrianal shields; seta Jv 5 inserted posterior to unsclerotized line which partly separates the dorsal and ventrianal shields; distance between ends of these unsclerotized lines equal to distance between bases of Jv 3; sclerotized diagonal section laterad of ventrianal shield is broad, with wide about 0.8 times as long as Zv 3 at the level of pore. Female. (Fig. 1–7) (five specimens measured). Gnathosoma: Fixed cheliceral digit 50–52 µm long with seven teeth in addition to apical tooth and a setiform pilus dentilis (Fig. 1). Movable cheliceral digit 48–50 µm long, with four teeth in addition to apical tooth. Dorsal cheliceral seta, lateral (antiaxial) and dorsal lyrifissures distinct. Epistome with anteromedian extension smooth and aciculate, with a pair of short anterolateral spines; some specimens with a pair of denticles between anteromedian extension and anterolateral spines (Fig. 2 A–B). Deutosternal groove of hypostome with eight rows of denticles, each bearing 6–14 denticles, except most basal row smooth (Fig. 3); anterior row V-shaped, followed by an inverted V-shaped row, subsequent rows roughly transverse; margins of groove not distinct. Setae h 1 and h 3 equal in length (25–30 µm), h 2 shorter (17–20 µm), Sc (h 4) (20–25 µm). Salivary styli well developed (Fig. 2 B). Internal malae fimbriate laterally. Corniculi 30–32 µm long, 12–15 µm wide at the widest point (Fig. 3). Palp chaetoxy 2-5 - 6-14 - 15; palp trochanter with one small ventral protuberance (Fig. 4); setae al 1 and al 2 of palp genu slightly stout; palp apotele 3 -tined. Dorsal idiosoma (Fig. 5): Dorsal shield entire, ovoid shape, smooth, totally covering dorsal surface; 410–430 µm long, 300–325 µm wide at level of coxa IV. Dorsal shield with 35 pairs of acicular setae. Podonotal region with 23 pairs of setae (j 1 - j 6, z 1 - z 6, s 1 - s 6, r 2 - r 6), 12 pairs of distinguishable lyrifissures (two pairs visible ventrally on mounted specimens) and two pairs of pores (mediad of r 3 and posterior to and mediad of r 6; visible ventrally on mounted specimens); with numerous sigilla posterior to j 5. Opisthonotal region with 12 pairs of setae (J 2 - J 5, Z 2 - Z 5, S 2 - S 3, R 2 - R 3); Z 5 slightly serrated; with 10 pairs of distinguishable lyrifissures (one pair visible ventrally on mounted specimens) and one pair of pores (gdZ 2, anterior and mediad to Z 2). Length of setae: j 1 (10–12), j 2 (25– 30), j 3 (40–45), j 4 (40–45), j 5 (45–50), j 6 (40–45), z 1 (7–10), z 2 (7–10), z 3 (35–40), z 4 (45–50), z 5 (40–45), z 6 (40–45), s 1 (7–10), s 2 (7–10), s 3 (10–12), s 4 (40–45), s 5 (40–45), s 6 (10–12), r 2 (7–10), r 3 (7–10), r 4 (7–10), r 5 (10–12), r 6 (7–10), J 2 (7–10), J 3 (7–10), J 4 (7–10), J 5 (7–10), Z 2 (7–10), Z 3 (7–10), Z 4 (7–10), Z 5 (60–62), S 2 (10–12), S 3 (10–12), R 2 (7–10), R 3 (10–12). Ventral idiosoma (Fig. 6): Base of tritosternum equal in length and wideth (12–17 µm), laciniae (70–75 µm) totally separated from each other, pilose. Pre-sternal area with two pairs of presternal platelets. Sternal shield reticulate anteriorly between st 1 and st 2, smooth posteriorly; 57–62 µm long at mid-line and 135–140 µm wide between coxae II and III; with four pairs of setae (st 1, st 2, st 4 acicular; st 3 stout), st 3 inserted about in transverse line and mediad to st 2; distance between st 3 – st 3 as long as st 3 seta (17–20 µm); and with four pairs of lyrifissures. Endopodal shields fused with and distinctly more sclerotised than sternal shield. Peritreme extending anteriorly to anterior margin of coxa I. Peritrematic shield fused with section of exopodal shield near to coxa IV, widest at level of posterior margin of coxa IV, with a lyrifissure posterior to stigma. Length of peritrematic-exopodal shield from stigma to posterior margin 70–75 µm, width 42–45 µm at level of posterior margin of coxa IV. Band of dorsal shield extending laterad to the fused peritrematic-exopodal shield ending sharply in posterior margin. Genital shield wider than long, 62–67 µm long and 100–102 µm wide, hyaline apex abutting the sternal shield; anterior margin rounded and posterior margin truncate, with a pair of setae st 5 and three pairs of sigilla; distance between st 5 - st 5 60–63 µm. Ventrianal shield with transverse striations anterior to Jv 4 and smooth posteriorly; 180–190 µm long from anterior margin to post-anal seta and 200–210 µm wide at widest point; with eight pairs of acicular setae (Jv 1 - Jv 5, Zv 1 - Zv 3) in addition to post-anal and para-anal setae; with five pairs of lyrifissures (antero-lateral margin of the shield, posterior to and laterad of Zv 1, posterior to and laterad of Zv 2, anterior to and mediad of Zv 3 and laterad of circum-anal seta); distance between Jv 5 and anterior margin of anal opening about 0.5–0.7 times as long as anal opening; seta Jv 5 about 5 times as long as circum-anal seta; post-anal seta about 4 times as long as para-anal setae, the latter situated at level of the posterior margin of anal opening. Dorsal and ventrianal shields partly separated by an unsclerotised line, the ends of this line reach the bases of Jv 3; seta Jv 3 situated at the level of this line; distance between Jv 3 and post-anal setae 70-80 µm. Sclerotised diagonal section laterad of ventrianal shield that connects the latter to the dorsal shield is broad, with one pair of pores; 18–20 µm wide at the level of pore; ending sharply at anterior part and ending broadly near of Zv 3 seta at posterior part. Length of ventral setae: st 1 (27–32), st 2 (25–30), st 3 (17–20), st 4 (25–27), st 5 (22–25), Jv 1 (20–25), Jv 2 (17–22), Jv 3 (20–25), Jv 4 (27–32), Jv 5 (50–55), Zv 1 (20–25), Zv 2 (20–25), Zv 3 (20–25), circum-anal (10–12) and post-anal seta (40–45). Spermatheca: Opening of spermathecal apparatus tubular, extending medially from base of coxa IV (Fig. 7). Other parts of spermatheca not clearly visible. Legs: Lengths: I: 320–330, II: 275–288, III: 230–250, IV: 325–345 µm. Chaetotaxy of legs I–IV: coxa 2, 2, 2, 1; trochanter 6, 5, 5, 5; femur (2 3 / 2 2 / 2 2), (2 3 / 1 2 / 2 1), (1 2 / 1 2 /0 0), (0 2 / 2 2 /0 0); genu (2 3 / 2 3 / 1 2), (2 3 / 1 2 / 1 2), (2 2 / 1 2 /0 1), (2 2 / 1 3 /0 0); tibia (2 3 / 2 3 / 2 2), (2 2 / 1 2 / 1 2), (2 1 / 1 2 / 1 1), (2 1 / 1 3 / 1 1). All leg setae acicular, except one antero-lateral pilose seta on trochanter II. All legs with pretarsus, each with elongate ambulacral stalk and a pair of strongly sclerotised claws, with three rounded pulvilli; claws of pretarsus I slightly smaller than others. Male. (Fig. 8–12) (five specimens measured). Gnathosoma: Fixed cheliceral digit 47–49 µm long, with six teeth in addition to apical tooth, with transverse line across the digit and a setiform pilus dentilis (Fig. 8 A–C). Movable cheliceral digit 45–47 µm long, with one tooth in addition to apical tooth. Spermatodactyl curved; with an internal canal along proximal part (2 / 3 length of spermatodactyl) and with distal part spatulate (1 / 3 length of spermatodactyl). Total length of spermatodactyl 65–70 µm, free process 30–35 µm long. Dorsal cheliceral seta, lateral (antiaxial) and dorsal lyrifissures distinct. Corniculi 25–27 µm long, 7–10 µm wide (Fig. 9). Epistome and hypostome as in female. Setae h 1 and h 3 equal length (25– 27 µm); setae h 1 and Sc equal length (20–25 µm) and slightly shorter than other. Palps as in female. Dorsal idiosoma: 375–400 µm long, 275–300 µm wide. Dorsal shield similar to that of female. Measurements of setae: j 1 (10–12), j 2 (25–30), j 3 (40–45), j 4 (40–45), j 5 (40–50), j 6 (35–40), z 1 (7–10), z 2 (7–10), z 3 (35–40), z 4 (40–50), z 5 (40–50), z 6 (40–50), s 1 (7–10), s 2 (7–10), s 3 (10–12), s 4 (40–50), s 5 (40–50), s 6 (10–12), r 2 (7–10), r 3 (7–10), r 4 (7–10), r 5 (10–12), r 6 (7–10), J 2 (7–10), J 3 (7–10), J 4 (7–10), J 5 (7–10), Z 2 (7–10), Z 3 (7–10), Z 4 (7– 10), Z 5 (55–65), S 2 (10–12), S 3 (10–12), R 2 (7–10), R 3 (7–10). Ventral idiosoma: Base of tritosternum 10–12 µm long and 15–18 µm wide proximally, lacinae (70–75 µm) totally separated from each other, pilose (Fig. 10). Except for the fusion of sternal and genital shields (sternogenital shield), shape, pattern and fusions of ventral shields as in female. Sternogenital shield reticulate between st 1 and st 2, smooth posteriorly; 100–110 µm long and 130–140 µm wide at widest point between coxae II and III; with five acicular setae (s t 1 – st 5), distance st 1 – st 1 45–50 µm, st 2 – st 2 70–75 µm, st 3 – st 3 80–85 µm, st 4 – st 4 80–85 µm and st 5 – st 5 70–75 µm; with four pairs of lyrifissures. Ventrianal shield 210–220 µm long from anterior margin to postanal seta and 200–210 µm wide at widest point; with eight pairs of setae (Jv 1 – Jv 5, Zv 1 – Zv 3) in addition to postanal and circum-anal setae; and with five pairs of lyrifissures (antero-lateral margin of the shield, posterior to and laterad of Zv 1, posterior to and laterad of Zv 2, anterior to and mediad of Zv 3 and laterad of circum-anal seta); postanal seta about 4 times as long as circum-anal seta. Length of ventral setae: st 1 (25–30), st 2 (25–30), st 3 (20–25), st 4 (25–30), st 5 (20–25), Jv 1 (20–25), Jv 2 (20–25), Jv 3 (20–25), Jv 4 (30–35), Jv 5 (45-50), Zv 1 (20–25), Zv 2 (20– 25), Z 3 (20–25), circum-anal (10–12) and post-anal seta (40–45). Legs: Lengths: I: 300–315, II: 260–275, III: 230–245, IV: 310–325 µm. Chaetotaxy of legs similar to that of female. Leg II with one antero-lateral pilose seta on trochanter (similar to female); femur with two ventral spur-like setae (one large spur 30–35 µm length and one small spur on elevated base); genu with two small ventral spur-like setae; tibia with one small ventral spur-like seta; tarsus with one acicular ventral seta on raised base (Fig. 11–12). All other setae of legs acicular. All legs with pretarsus, elongate ambulacral stalk, a pair of strongly sclerotised claws, with three rounded pulvillus; claws of pretarsus I slightly smaller than others, similar to those of female. Material examined. Holotype female, 33 paratype females and 11 paratype males from litter of forest with Betula ermanii —bamboo Sasa spp. and Abies sakhalinensis — Picea glehnii at Chekhov Mounting (47 °00' N, 142 ° 50 ' E), Susunaiskii Ridge, south of Sakhalin Island, Russia, 9 August 1990, collected by I. Volonikhina (Marchenko); 15 paratype females and 14 paratype males from litter at forest with Abies sakhalinensis; Querqus mongolica — Betula ermanii and forest with Ulmus spp. at south of Kunashir Island (43 ° 50 ' N, 145 ° 30 ' E), Russia, 18 July and 20 July 1989, collected by I. Volonikhina (Marchenko); two paratype females and three paratype males from bog with moss and Ledum palustre, in moss at environs of Yuzhno-Kurilsk, Kunashir Island, Russia, 4 August 1989, collected by I. Volonikhina (Marchenko); three paratype female and two paratype males in litter with bushes of Alnus spp. and Taxus cuspidate at Shikotan Island (43 ° 48 ' N, 146 ° 51 ' E), 30 October 1986, collected by S. Kalabin. Holotype and 51 paratypes (30 females and 21 males) deposited at Zoological Museum of the Institute of Systematics and Ecology of Animals, Novosibirsk, Russia; 32 paratypes (23 females and nine males) deposited at arthropod collection of Manchester Museum, Manchester, United Kingdom. Other examined material: 11 females and two males from mosses – lichens – blueberries (Vaccinum spp.) and in litter in a forest of Abies sakhalinensis – Picea glehnii and Betula ermanii –bamboo Sasa spp. at Chekhov Mounting, Susunaiskii Ridge, south of Sakhalin Island, Russia; five females from litter of mixed forest at environs of Ogonki, South Sakhalin, Russia; eight females and six males from litter in a forest of Abies sakhalinensis, in litter of mixed forest with Betula ermanii and Alnus spp., in a broadleaved forest, in a fumarole field with Pinus pumila, in bog with moss and Ledum palustre, at Kunashir Island, Russia; two females from bushes of Juniperus sargentii and Alnus spp. at Shikotan Island, Russia. Etymology. The name ochotensis refers to the name of Okhotsk Sea that bathes Sakhalin and Kuril Islands from the North. Remarks. Gamasiphis ochotensis sp. n. is most similar to Gamasiphis angaridis Marchenko, 2013, but females of the latter have setae s 3 and s 6 as long as s 5; distance between bases of st 3 – st 3 about 0.5 times as long as st 3; seta Jv 3 inserted posteriorly of unsclerotized line which separates partly the dorsal and ventrianal shields; sclerotised diagonal section laterad of ventrianal shield is narrow, with width at the level of pore about 0.3 times shorter than length of Zv 3; and males have spermatodactyl widest at proximal part and gradually narrowing apically, and tarsus II with a spur-seta. It is also similar to Gamasiphis lanceolatus Karg, 1987, but females of the latter have 22 pairs of podonotal setae (s 1 absent) and 13 pairs of opisthonotal setae (S 1 present); dorsal setae j 2 – j 6, z 3 – z 6, s 4 – s 5 and z 5 distally expanded; and males have spermatodactyl with very narrow distal part, about 0.5 times as long as total length of spermatodactyl.Published as part of Marchenko, Irina I., 2013, A new species of Gamasiphis Berlese (Acari: Ologamasidae) from Russia (Sakhalin and Kuril Islands) with a key to the Asian species, pp. 172-180 in Zootaxa 3741 (1) on pages 173-177, DOI: 10.11646/zootaxa.3741.1.6, http://zenodo.org/record/21923
JETP Letters V. 68, I .11
No full textJETP Letters -- December 10, 1998
Volume 68, Issue 11, pp. 823-895
FIELDS, PARTICLES, AND NUCLEI
Anomalous enhancement of DD reaction in Pd and Au/Pd/PdO heterostructure targets under low-energy deuteron bombardment
H. Yuki, J. Kasagi, A. G. Lipson, T. Ohtsuki, T. Baba, T. Noda, B. F. Lyakhov, and N. Asami
Full Text: PDF (81 kB)
ATOMS, SPECTRA AND RADIATION
On the theory of chirped optical solitons in fiber lines with varying dispersion
S. K. Turitsyn and V. K. Mezentsev
Full Text: PDF (86 kB)
PLASMA, GASES
Resonance structure of doubly-charged-ion production during laser dielectronic ionization of atoms
I. I. Bondar' and V. V. Suran
Full Text: PDF (75 kB)
CONDENSED MATTER
Thermopower in the hopping conductivity region: Transition from Mott's to Zvyagin's formula
S. V. Demishev, M. V. Kondrin, A. A. Pronin, N. E. Sluchanko, N. A. Samarin, A. G. Lyapin, and G. Biscupski
Full Text: PDF (79 kB)
Scaling function near a transition to an insulator state
V. T. Dolgopolov
Full Text: PDF (79 kB)
On the acoustic nature of a microwave echo in silicate glasses
B. P. Smolyakov and N. K. Solovarov
Full Text: PDF (66 kB)
Quantum orientational melting and the phase diagram of a mesoscopic system
A. I. Belousov and Yu. E. Lozovik
Full Text: PDF (163 kB)
Velocity asymmetry of a 1D 180-degree domain wall in ferromagnets with negative cubic anisotropy
G. E. Khodenkov
Full Text: PDF (102 kB)
Induced modulation instability of spin waves in ferromagnetic films
V. E. Demidov
Full Text: PDF (64 kB)
Effective spacetime and Hawking radiation from a moving domain wall in a thin film of 3He-A
T. A. Jacobson and G. E. Volovik
Full Text: PDF (124 kB)
High-frequency stabilization of nonlinear dissipative structures in nematic liquid crystals
B. I. Lev, O. G. Sarbei, E. K. Frolova, P. M. Tomchuk, and V. N. Sergienko
Full Text: PDF (282 kB)
On a new type of sublattice tipping in noncollinear antiferromagnets
V. I. Marchenko and A. M. Tikhonov
Full Text: PDF (72 kB)
Phonon relaxation of subgap levels in superconducting quantum point contacts
D. A. Ivanov and M. V. Feigel'man
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ELEMENTARY PARTICLES AND FIELDS
Erratum: Nonlinear low-temperature magnetization of the quasi-one-dimensional charge-density-wave conductor K0.3MoO3 [JETP Lett. 68, No. 4, 301–306 (25 August 1998)]
D. V. Eremenko, A. V. Kuznetsov, S. V. Zaitsev-Zotov, and V. N. Trofimov
Full Text: PDF (27 kB)Archived web conten
Density and stratigraphy of firn at Lomonosovfonna derived from shallow cores in 1997-2015
No full textThe present dataset contains measurements of density and observations of stratigraphy in the subsurface snow/firn/ice done at Lomonosovfonna during 1997-2015. The variables are named according to the year, when the data was derived: "LF" for Lomonosovfonna and "NN" corresponds to the year, e.g. 97 - 1997, 07 - 2007. Most variables contain the following fields:rho* - density measurements: column 1 - depth of sample top, m; column 2 - depth of sample bottom, m; column 3 - density values, kg m^-3;rho*_reg - density measurements on a regular 1 cm spaced grid, gaps are filled by linear interpolation and extrapolated using "nearest neighbor" logic; column 1 - depth, m; column 2 - density values, kg m^-3;strat - stratigraphy: column 1 - depth of sample top, m; column 2 - depth of sample bottom, m; column 3 - stratigraphy coded as: 1 - snow, 2 - firn, 3 - ice lens;lat* - latitude, degrees to the North of equator;lon* - longitude, degrees to the East of the prime meridian;h* - elevation, m above the sea level.LF97: Six shallow cores were drilled in spring 1997 approximately along the centerline of Nordenskiöldbreen. A system of mass balance stakes at locations of the cores is maintained by Uppsala university. The density is approximated from visual stratigraphic description according to the classification suggested by Pohjola et al., 2002 (see Table 1 there). The density values are the result of averaging of density values ascribed to stratigraphic units identified in core pieces and weighted by their respective thicknesses.LF99: Three shallow cores were drilled in the end of April 1999 at the location where in 1997 a 120 m long ice core was drilled. The cores were drilled along a North-South oriented line with a spacing of 2.5 m between the neighboring cores. The fields in the LF99 variable are named accordingly: fields with the data from the southern location contain "S", northern - "N", central - "C". The field and laboratory work was done by Håkan Samuelsson. Methods and analysis are described in detail in the Master Thesis: "Distribution of melt layers on the ice field Lomonosovfonna, Spitsbergen", defended at Uppsala University in 2001.LF08: One shallow core was drilled by Sanja Forsström, Elisabeth Isaksson, Veijo Pohjola and Jim Hedfors within ca 100 from the location where in 1997 a 120 m long ice core was drilled. Density was measured using two different methods at the cold lab of the Norwegian Polar Institute in Tromso by Sanja Forsström and Tonu Martma. The structure field "rho" contains values calculated from measured geometrical dimensions of the core samples and weights. The fields "rhoDEPcorepieces", "rhoDEPionsamples" and "rhoDEPisotopesamples" contain density values measured using dielectric profiling in three sets of samples.LF12: The core was drilled by Veijo Pohjola and Rickard Pettersson on the 13 of April 2012. Field notes done by Sergey Marchenko. Cold lab operations were done by Sergey Marchenko and Elena Klimenko at the University Centre in Svalbard (UNIS) in Longyearbyen, Norway during 26 April - 3 May 2012. Density was measured in cylindrical and cuboid samples prepared using a band saw to ensure regular shape. The structure field "rho_c" contains density measurements done using cylindrical core pieces. The structure field "rho_rb" contains density measurements done using relatively long cuboid samples prepared from cylindrical core pieces using a band saw. The structure field "rho_rs" contains density measurements done using shorter cuboid samples prepared from the longer pieces using a band saw. The structure field "rho_reg" is based on the "rho_rs" structure field.LF13: The core was drilled by Christian Zdanowics, Dorothee Vallot and Veijo Pohjola in April 2013 and later analyzed by Carmen Vega in the cold lab of the Norwegian Polar Institute in Tromso, Norway.LF14: The core was drilled by Veijo Pohjola and Ward van Pelt in the end of March 2014. Field notes are done by Veijo Pohjola. Cold lab operations were done by Sergey Marchenko, William Kohler and Elisbeth Isaksson in the Norwegian Polar Institute facilities in Tromso, Norway, during 05-10 of October 2014. Density was measured in cylindrical or cuboid samples prepared using a band saw to ensure regular shape.LF15: the core was drilled by Veijo Pohjola and Ward van Pelt on the 15th of April 2015. Field notes are done by Veijo Pohjola. Cold lab operations were done by Sergey Marchenko, Glennda Villanflor and Elisbeth Isaksson in the Norwegian Polar Institute facilities in Tromso, Norway, during 02-05 of November 2015. Density was measured in cylindrical or cuboid samples prepared using a band saw to ensure regular shape. The data is used in the following publications:1) Marchenko, S., Cheng, G., Lötstedt, P., Pohjola, V., Pettersson, R., van Pelt, W., Reijmer, C., (2019). Thermal conductivity of firn at Lomonosovfonna, Svalbard, derived from subsurface temperature measurements, The Cryosphere Discussions, doi: 10.5194/tc-2018-294;2) Marchenko, S., van Pelt, W., Claremar, B., Pohjola, V., Pettersson, R., Machguth, H., Reijmer, C., (2017). Parameterizing Deep Water Percolation Improves Subsurface Temperature Simulations by a Multilayer Firn Model, Frontiers in Earth Science, doi: 10.3389/feart.2017.00016;3) Marchenko, S., Pohjola, V., Pettersson, R., van Pelt, W., Vega, C., Machguth, H., Bøggild C., Isaksson, E., (2017). A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012-14, Journal of Glaciology, doi: 10.1017/jog.2016.118;4) Pohjola, V., Moore, J., Isaksson, E., Jauhiainen, T., van de Wal, R., Martma, T., Meijer, H., Vaikmäe, R., (2002). Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard, Journal of Geophysical Research, doi:10.1029/2000JD000149;5) Isaksson, E., Pohjola, V., Jauhiainen, T., Moore, J., Pinglot, J., Vaikmäe, R., van De Wal, R., Hagen, J.O., Ivask, J., Karlöf, L., Martma, T., Meijer, H., Mulvaney, R., Thomassen M., van den Broeke, M., (2001). A new ice-core record from Lomonosovfonna, Svalbard: Viewing the 1920–97 data in relation to present climate and environmental conditions, Journal of Glaciology, doi:10.3189/172756501781832313;6) Pälli, A., Kohler, J., Isaksson, E., Moore, J., Pinglot, J., Pohjola, V., & Samuelsson, H., (2002). Spatial and temporal variability of snow accumulation using ground-penetrating radar and ice cores on a Svalbard glacier, Journal of Glaciology, doi:10.3189/172756502781831205;7) van Pelt, W, Pettersson, R., Pohjola, V., Marchenko, S., Claremar, B., and Oerlemans, J., (2014). Inverse estimation of snow accumulation along a radar transect on Nordenskiöldbreen, Svalbard, Journal of Geophysical Research, doi:10.1002/2013JF003040;8) Vega, C., Pohjola, V., Beaudon, E., Claremar, B., van Pelt, W., Pettersson, R., Isaksson, E., Martma, T., Schwikowski, M., Bøggild, C., (2016). A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: a case study on Lomonosovfonna, Svalbard, The Cryosphere, doi:10.5194/tc-10-961-2016;</div
Multivariate Skew-t Distributions in Econometrics and Environmetrics
No full textThis dissertation is composed of three articles describing novel approaches for
analysis and modeling using multivariate skew-normal and skew-t distributions in
econometrics and environmetrics.
In the first article we introduce the Heckman selection-t model. Sample selection
arises often as a result of the partial observability of the outcome of interest in
a study. In the presence of sample selection, the observed data do not represent a
random sample from the population, even after controlling for explanatory variables.
Heckman introduced a sample-selection model to analyze such data and proposed a
full maximum likelihood estimation method under the assumption of normality. The
method was criticized in the literature because of its sensitivity to the normality assumption.
In practice, data, such as income or expenditure data, often violate the
normality assumption because of heavier tails. We first establish a new link between
sample-selection models and recently studied families of extended skew-elliptical distributions.
This then allows us to introduce a selection-t model, which models the
error distribution using a Student���s t distribution. We study its properties and investigate
the finite-sample performance of the maximum likelihood estimators for
this model. We compare the performance of the selection-t model to the Heckman
selection model and apply it to analyze ambulatory expenditures.
In the second article we introduce a family of multivariate log-skew-elliptical distributions,
extending the list of multivariate distributions with positive support. We
investigate their probabilistic properties such as stochastic representations, marginal
and conditional distributions, and existence of moments, as well as inferential properties.
We demonstrate, for example, that as for the log-t distribution, the positive
moments of the log-skew-t distribution do not exist. Our emphasis is on two special
cases, the log-skew-normal and log-skew-t distributions, which we use to analyze U.S.
precipitation data.
Many commonly used statistical methods assume that data are normally distributed.
This assumption is often violated in practice which prompted the development
of more flexible distributions. In the third article we describe two such multivariate
distributions, the skew-normal and the skew-t, and present commands for
fitting univariate and multivariate skew-normal and skew-t regressions in the statistical
software package Stata
Wavefield focusing using a generalised, potentially asymmetric homogeneous Green's function
No full textMarchenko-type integrals typically relate so-called focusing functions and Green's functions via the reflection response measured on the open surface of a volume of interest. Originating from one dimensional inverse scattering theory, the extension to two and three dimensions set in motion various new developments regarding imaging in complex materials. This extension, however, is based on wavefield decomposition inside the volume and a truncated medium state, i.e. a version of the medium that is reflection-free underneath the focusing location, suggesting that evanescent, refracted and diving waves cannot be included in the representation. We elaborate on a new derivation for Marchenko-like integrals that (i) extends the concept of wavefield focusing by using a generalised homogeneous Green's function, (ii) is based on partial differential equations and thereby allows for additional insights and a new physical intuition for Marchenko equations, (iii) unifies wavefield focusing for open and closed boundary systems, (iv) does not require wavefield decomposition or a truncated medium state, thus including the full wavefield Green's function, (v) enables using forward modelling to obtain, e.g., Marchenko-type, time-compact focusing functions. We place a particular focus on the latter point, illustrating and investigating how to solve the underlying partial differential equations for various types of focusing functions. This paves the way for a deeper understanding of focusing functions as well as advanced full wavefield Marchenko schemes. While the derivations are generally presented for the 3D case, we show numerical examples in 1D.Applied Geophysics and Petrophysic
JETP Letters V. 77, I .10
No full textJETP Letters -- May 25, 2003
Volume 77, Issue 10, pp. 537-597
ATOMS, SPECTRA, RADIATIONS
Magnetization-Induced Third Harmonic Generation in Magnetophotonic Microcavities
T. V. Murzina, R. V. Kapra, A. A. Rassudov, O. A. Aktsipetrov, K. Nishimura, H. Uchida, and M. Inoue
pp. 537-540 Full Text: PDF (113 kB)
PLASMA, GASES
Dust-Alfvén Mach Cones in Saturn's Dense Rings
A. A. Mamun, P. K. Shukla, and R. Bingham
pp. 541-545 Full Text: PDF (61 kB)
Weak Turbulence of Gravity Waves
A. I. Dyachenko, A. O. Korotkevich, and V. E. Zakharov
pp. 546-550 Full Text: PDF (60 kB)
Memory Effects in Stochastic Transport
V. Yu. Zaburdaev and K. V. Chukbar
pp. 551-555 Full Text: PDF (58 kB)
CONDENSED MATTER
Effect of Elastic Deformations on the Critical Behavior of Three-Dimensional Systems with Long-Range Interaction
S. V. Belim
pp. 556-560 Full Text: PDF (53 kB)
Observation of Exchange Interaction Effects under Optical Orientation of Excitons in AlGaAs
A. V. Efanov, K. S. Zhuravlev, T. S. Shamirzaev, W. Kellner, and H. Pasher
pp. 561-564 Full Text: PDF (58 kB)
On the Penetration Depth of a Strong Field into Superconductors
V. I. Marchenko and E. R. Podolyak
pp. 565-566 Full Text: PDF (33 kB)
Ferromagnetic Films with Magnon Bandgap Periodic Structures: Magnon Crystals
Yu. V. Gulyaev, S. A. Nikitov, L. V. Zhivotovskii, A. A. Klimov, Ph. Tailhades, L. Presmanes, C. Bonningue, C. S. Tsai, S. L. Vysotskii, and Yu. A. Filimonov
pp. 567-570 Full Text: PDF (306 kB)
Magnetic Phase Diagram for a Random Three-Dimensional Ising Point-Dipole Lattice
E. Z. Meilikhov
pp. 571-576 Full Text: PDF (86 kB)
Giant Magnetoresistance Oscillations Caused by Cyclotron Resonance Harmonics
S. I. Dorozhkin
pp. 577-581 Full Text: PDF (74 kB)
Detection of Magnetic Resonance Signals with Anomalous Dispersion and Two Types of Isolated Manganese Centers in the Chalcopyrite Crystal (Zn,Mn)GeP2
P. G. Baranov, S. I. Goloshchapov, G. A. Medvedkin, and V. G. Voevodin
pp. 582-586 Full Text: PDF (72 kB)
Decoherence Due to Nodal Quasiparticles in d-wave Qubits
Ya. V. Fominov, A. A. Golubov, and M. Yu. Kupriyanov
pp. 587-591 Full Text: PDF (72 kB)
Anisotropy of Microwave Conductivity in the Superconducting and Normal States of YBa2Cu3O7 – x: 3D–2D Crossover
M. R. Trunin and Yu. A. Nefedov
pp. 592-597 Full Text: PDF (89 kB)Archived web conten
V Круглий стіл з міжнародною участю «Сучасні тенденції фонетичних досліджень»
No full textThe paper presents a view on rhythm and tempo as central elements of both speech and
music and their ability to convey emotions and influence them as well. The author dwells on
similarities of rhythm and tempo in speech and music while also mentioning the discrepancies
mainly caused by unpredictability of human speech and the necessity of accuracy in music
recordings. The importance of rhythm and tempo for textsetting is acknowledged
TOWARD THE SOURCES OF THE PROJECT OF “HISTORY OF RUSSIAN PHILOSOPHY” BY V. V. ZENKOVSKY
No full textThe article discusses a question of genesis of the fundamental “History of Russian Philosophy” by V.V. Zenkovsky. The author points out that one of the most meaningful factors (but not the only one) in that was the creating in 1910 of a group named “Put’” (“The Path”), devoted to the religious philosophy, and also creating of the interna-tional philosophy journal “Logos” — as well as the controversy about specific charac-ter and ways of development of Russian philosophy between V.F. Ern (“Put’ ”) from the one side, and B.V. Yakovenko, S.I. Gessen, F.A. Stepun (“Logos”) and S.L. Frank from the other. One can easily find signs of that controversy on the pages of famous work of Zenkovsky, though the main cause of appearance of this book was the Russian philoso-phy itself, an existence of which in all its peculiarity and significance became obvious in the middle of the XXth century
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