Strictly singular operators and isomorphisms of Cartesian products of power series spaces

V. P. Zahariuta, in 1973, used the theory of Fredholm operators to develop a method to classify Cartesian products of locally convex spaces. In this work we modify his method to study the isomorphic classification of Cartesian products of the kind E0p(a)×E¥ q(b) where 1 £ p,q £ ¥, p ¹ q, a = (an)n=1¥ and b = (bn)n=1¥ are sequences of positive numbers and E0p(a), E¥ q (b) are respectively lp-finite and lq-infinite type power series spaces

Examining the effectiveness of mindfulness based training program on female handball players’ psychological skills and coping with stress strategies

The aim of this study was to examine the effectiveness of a mindfulness-based training program on female handball athletes’ psychological skills and strategies to cope with stress in sport. In the study, as a quasi-experimental method, pre-test, and posttest models without a control group were used. The study group consists of 9 female handball players who play in the Antalya Muratpaşa Municipality Women's Handball Team. In the research, a personal information questionnaire, the Athletic Coping Skills Inventory and Coping Strategies in Sport Competition Inventory were used to collect data as pre-test before the program and as post-test at the end of the program. In the study, the Mindfulness-Based Training Program was implemented once a week as group training, consisting of 8 sessions lasted 60 minutes each. Wilcoxon Signed Rank Test was used to test the significance of the scope difference. As a result of the study, after the program, there was a significant difference in terms of ability to cope with adversity, coachability, concentration, goal setting and mental preparation, and being free from worries. Moreover, a significant difference between pre-test and post-test scores of the task-oriented coping dimension in Sport Competition Inventory was noted.No sponso

Benzyl N-{(1S)-2-hy­droxy-1-[N′-(2-nitro­benzyl­idene)hydrazinylcarbon­yl]eth­yl}carbamate

The carbamate and hydrazone groups in the title compound, C18H18N4O6, are approximately orthogonal [dihedral angle = 83.3 (4)°], and the carbonyl groups are effectively anti [O=C⋯C=O torsion angle = −116.2 (7)°]. The conformation about the imine bond [1.295 (11) Å] is E. The crystal packing is dominated by O—H⋯O and N—H⋯O hydrogen bonding, which leads to two-dimensional arrays in the ab plane

Benzyl N-[(S)-2-hy­droxy-1-({[(E)-2-hy­droxy-4-meth­oxy­benzyl­idene]hydrazin­yl}carbon­yl)eth­yl]carbamate

The shape of the title compound, C19H21N3O6, is curved with the conformation about the imine bond [1.291 (3) Å] being E. While the hy­droxy-substituted benzene ring is almost coplanar with the hydrazinyl residue [N—N—C—C = 177.31 (18)°], an observation correlated with an intra­molecular O—H⋯N hydrogen bond leading to an S(6) ring, the remaining residues exhibit significant twists. The carbonyl residues are directed away from each other as are the amines. This allows for the formation of O—H⋯O and N—H⋯O hydrogen bonds in the crystal, which lead to two-dimensional supra­molecular arrays in the ac plane. Additional stabilization to the layers is afforded by C—H⋯π inter­actions

tert-Butyl N-{(1S)-1-[(2,4-dihy­droxy­benzyl­idene)hydrazinecarbon­yl]-2-hy­droxy­eth­yl}carbamate ethanol monosolvate

The mol­ecule of the title ethanol solvate, C15H21N3O6·C2H6O, adopts a curved shape; the conformation about the imine bond [N=N = 1.287 (3) Å] is E. The amide residues occupy positions almost orthogonal to each other [dihedral angle = 85.7 (2)°]. In the crystal, a network of O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds leads to the formation of supra­molecular arrays in the ab plane with the ethanol mol­ecules lying to the periphery on either side. Disorder in the solvent ethanol mol­ecule was evident with two positions being resolved for the C atoms [site occupancy of the major component = 0.612 (10)]

The Sariçiçek Howardite Fall in Turkey: Source Crater of HED Meteorites on Vesta and İmpact Risk of Vestoids

The Sariçiçek howardite meteorite shower consisting of 343 documented stones occurred on 2 September 2015 in Turkey and is the first documented howardite fall. Cosmogenic isotopes show that Sariçiçek experienced a complex cosmic ray exposure history, exposed during ~12–14 Ma in a regolith near the surface of a parent asteroid, and that an ~1 m sized meteoroid was launched by an impact 22 ± 2 Ma ago to Earth (as did one third of all HED meteorites). SIMS dating of zircon and baddeleyite yielded 4550.4 ± 2.5 Ma and 4553 ± 8.8 Ma crystallization ages for the basaltic magma clasts. The apatite U-Pb age of 4525 ± 17 Ma, K-Ar age of ~3.9 Ga, and the U,Th-He ages of 1.8 ± 0.7 and 2.6 ± 0.3 Ga are interpreted to represent thermal metamorphic and impact-related resetting ages, respectively. Petrographic, geochemical and O-, Cr- and Tiisotopic studies confirm that Sariçiçek belongs to the normal clan of HED meteorites. Petrographic observations and analysis of organic material indicate a small portion of carbonaceous chondrite material in the Sariçiçek regolith and organic contamination of the meteorite after a few days on soil. Video observations of the fall show an atmospheric entry at 17.3 ± 0.8 kms-1 from NW, fragmentations at 37, 33, 31 and 27 km altitude, and provide a pre-atmospheric orbit that is the first dynamical link between the normal HED meteorite clan and the inner Main Belt. Spectral data indicate the similarity of Sariçiçek with the Vesta asteroid family (V-class) spectra, a group of asteroids stretching to delivery resonances, which includes (4) Vesta. Dynamical modeling of meteoroid delivery to Earth shows that the complete disruption of a ~1 km sized Vesta family asteroid or a ~10 km sized impact crater on Vesta is required to provide sufficient meteoroids ≤4 m in size to account for the influx of meteorites from this HED clan. The 16.7 km diameter Antonia impact crater on Vesta was formed on terrain of the same age as given by the 4He retention age of Sariçiçek. Lunar scaling for crater production to crater counts of its ejecta blanket show it was formed ~22 Ma ago

Unbounded linear operators and nuclear Köthe quotients

Publisher's Versio

Examining predictors of subjective well-being and stress symptoms among üniversity students

Bu çalışmanın amacı, üniversite öğrencilerinin farkandalık, öz-duyarlık, duyguları yönetme becerileri ve sosyal ilgi düzeylerinin öznel iyi oluş ve stres belirtileri düzeylerini anlamlı düzeyde yordayıp yordamadığını incelemektir. Araştırmanın çalışma grubu Akdeniz bölgesinde, büyükşehirde yer alan bir üniversitenin farklı fakültelerinde öğrenimine devam eden 519’u kadın ve 315’i erkek olmak üzere toplam 834 öğrenciden oluşmaktadır. Araştırmanın verilerinin toplanmasında, Beş Boyutlu Bilinçli Farkındalık Ölçeği, Öz-duyarlık Ölçeği, Duyguları Yönetme Becerileri Ölçeği, Yaşam Doyumu Ölçeği, Pozitif ve Negatif Duygu Durum Ölçeği, Stres Belirtileri Ölçeği, Toplumsal İlgi Ölçeği ve Kişisel Bilgi Formu kullanılmıştır. Hiyerarşik regresyon analizi sonucunda farkındalığın beş alt boyutu arasında yer alan tanımlama, farkındalıkla davranma ve içsel deneyimlere tepkisizliğin öznel iyi oluşu anlamlı olarak yordadığı bulunmuştur. Araştırma sonuçlarına göre stres belirtilerini farkındalığın alt boyutları arasından gözlemleme, farkındalıkla davranma, içsel deneyimleri yargılamama ve içsel deneyimlere tepkisizlik boyutlarının anlamlı bir şekilde yordadığı bulunmuştur. Öz-duyarlığın alt boyutları arasında öznel iyi oluşu öz-sevecenlik, öz-yargılama ve izolasyon bulunurken stres belirtilerini öz-duyarlığın izolasyon ve aşırı özdeşleşme boyutlarının yordadığı bulunmuştur. Araştırma sonuçlarına göre ayrıca, duyguları yönetme becerilerinin öznel iyi oluşun ve stres belirtilerinin anlamlı bir yordayıcısı olduğu görülmüştür. Son olarak, sosyal ilginin öznel iyi oluşu anlamlı bir şekilde yordadığı ancak stres belirtilerini yordamadığı görülmüştür.The aim of the current study was to investigate the role of mindfulness, self-compassion, emotion management skills and social interest levels in subjective well-being and stress symptoms. The universe of this study is the students who are attending different faculties at a university in a big city in the Mediterranean region in Turkey. Research sample consists of 834 students, of which were 519 female and 315 male. In the study, Five Facet Mindfulness Questionnaire, Self-Compassion Scale, Emotion Management Scale, Satisfaction with Life Scale, Positive and Negative Affect Schedule, Stress Self-Assessment Checklist, Social Interest Index and Personal Information Form was used. Hierarchical regression results showed that describing, acting with awareness and nonreactivity dimensions of mindfulness significantly predicted subjective well-being. The results also showed that observing, acting with awareness, nonjudging of inner experiences and nonreactivity significantly predicted syptoms stress. It also appeared that selfkidness, self-judgement, and isolation dimensions of self-compassion were significant predictors of subjective well-being whereas only isolation and over-identification dimesions of self-compassion were significant predictors of stress symptoms. According to the results, emotion management skills significantly predicted both subjective well-being and stress symptoms. Finally, it appeared that social interest significantly predicted subjective wellbeing, but did not predict stress symptoms.No sponso

ÜNİVERSİTE ÖĞRENCİLERİNDE ÖZNEL İYİ OLUŞ VE STRES BELİRTİLERİNİN YORDAYICILARININ İNCELENMESİ

Bu çalışmanın amacı, üniversite öğrencilerinin farkandalık, öz-duyarlık, duyguları yönetme becerileri ve sosyal ilgi düzeylerinin öznel iyi oluş ve stres belirtileri düzeylerini anlamlı düzeyde yordayıp yordamadığını incelemektir. Araştırmanın çalışma grubu Akdeniz bölgesinde, büyükşehirde yer alan bir üniversitenin farklı fakültelerinde öğrenimine devam eden 519’u kadın ve 315’i erkek olmak üzere toplam 834 öğrenciden oluşmaktadır. Araştırmanın verilerinin toplanmasında, Beş Boyutlu Bilinçli Farkındalık Ölçeği, Öz-duyarlık Ölçeği, Duyguları Yönetme Becerileri Ölçeği, Yaşam Doyumu Ölçeği, Pozitif ve Negatif Duygu Durum Ölçeği, Stres Belirtileri Ölçeği, Toplumsal İlgi Ölçeği ve Kişisel Bilgi Formu kullanılmıştır. Hiyerarşik regresyon analizi sonucunda farkındalığın beş alt boyutu arasında yer alan tanımlama, farkındalıkla davranma ve içsel deneyimlere tepkisizliğin öznel iyi oluşu anlamlı olarak yordadığı bulunmuştur. Araştırma sonuçlarına göre stres belirtilerini farkındalığın alt boyutları arasından gözlemleme, farkındalıkla davranma, içsel deneyimleri yargılamama ve içsel deneyimlere tepkisizlik boyutlarının anlamlı bir şekilde yordadığı bulunmuştur. Öz-duyarlığın alt boyutları arasında öznel iyi oluşu öz-sevecenlik, öz-yargılama ve izolasyon bulunurken stres belirtilerini öz-duyarlığın izolasyon ve aşırı özdeşleşme boyutlarının yordadığı bulunmuştur. Araştırma sonuçlarına göre ayrıca, duyguları yönetme becerilerinin öznel iyi oluşun ve stres belirtilerinin anlamlı bir yordayıcısı olduğu görülmüştür. Son olarak, sosyal ilginin öznel iyi oluşu anlamlı bir şekilde yordadığı ancak stres belirtilerini yordamadığı görülmüştür.The aim of the current study was to investigate the role of mindfulness, self-compassion, emotion management skills and social interest levels in subjective well-being and stress symptoms. The universe of this study is the students who are attending different faculties at a university in a big city in the Mediterranean region in Turkey. Research sample consists of 834 students, of which were 519 female and 315 male. In the study, Five Facet Mindfulness Questionnaire, Self-Compassion Scale, Emotion Management Scale, Satisfaction with Life Scale, Positive and Negative Affect Schedule, Stress Self-Assessment Checklist, Social Interest Index and Personal Information Form was used. Hierarchical regression results showed that describing, acting with awareness and nonreactivity dimensions of mindfulness significantly predicted subjective well-being. The results also showed that observing, acting with awareness, nonjudging of inner experiences and nonreactivity significantly predicted syptoms stress. It also appeared that selfkidness, self-judgement, and isolation dimensions of self-compassion were significant predictors of subjective well-being whereas only isolation and over-identification dimesions of self-compassion were significant predictors of stress symptoms. According to the results, emotion management skills significantly predicted both subjective well-being and stress symptoms. Finally, it appeared that social interest significantly predicted subjective wellbeing, but did not predict stress symptoms.No sponso