25 research outputs found

    Development of the St. Petersburg's linked open data site using Information Workbench

    Get PDF
    This paper discusses the Russian projects publishing open government data. The article also describes the development of the open linked data portal and its approach to convert open government data in the open linked data. Information Workbench is used to build this system. It allows storing, visualizing and converting data files in Semantic Web formats

    К вопросу использования Β«ΠΏΠΎΠ»Π΅Π·Π½Ρ‹Ρ…Β» Π·Π°Π΄Π°Ρ‡ для обСспСчСния Ρ€Π°Π±ΠΎΡ‚ΠΎΠΉ Π±Π»ΠΎΠΊΡ‡Π΅ΠΉΠ½ систСм

    Get PDF
    This paper is a logical continuation of the paper about possible approaches to solving the β€œUseful Proof-of-work for blockchains” problem. We suggest some alternative ways for searching useful tasks for Proof-of-work systems. These ways are based on the process of the multiple and independent repetition of a simple experiment. The experiment is to chose an element independently and uniformly from a quite large set and then to check if the chosen element has a specific rare property. In the classic blockchain of Bitcoin this experiment is a so-called hash-puzzle. In these terms the process of solving a hash-puzzle may be replaced by searching rare astronomical objects or Go positions with specific conditions. Moreover, we describe a possible attack on the blockchain systems in which the task instance generation algorithm is replaced by the algorithm of selecting the task instance from the existing database with public access for publication of task instances and discuss the way of protection.Π‘Ρ‚Π°Ρ‚ΡŒΡ являСтся ΠΏΡ€ΠΎΠ΄ΠΎΠ»ΠΆΠ΅Π½ΠΈΠ΅ΠΌ Ρ€Π°Π±ΠΎΡ‚Ρ‹ ΠΎ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½Ρ‹Ρ… ΠΏΠΎΠ΄Ρ…ΠΎΠ΄Π°Ρ… ΠΊ Ρ€Π΅ΡˆΠ΅Π½ΠΈΡŽ Π·Π°Π΄Π°Ρ‡ΠΈ Β«UsefulProof-of-workforblockchainsΒ». ΠœΡ‹ ΠΏΡ€Π΅Π΄Π»Π°Π³Π°Π΅ΠΌ Π½Π΅ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ Π°Π»ΡŒΡ‚Π΅Ρ€Π½Π°Ρ‚ΠΈΠ²Π½Ρ‹Π΅ направлСния поиска ΠΏΠΎΠ»Π΅Π·Π½Ρ‹Ρ… Π·Π°Π΄Π°Ρ‡ для обСспСчСния Ρ€Π°Π±ΠΎΡ‚ΠΎΠΉ, основанныС Π½Π° Ρ‚ΠΎΠΌ, Ρ‡Ρ‚ΠΎ процСсс Ρ€Π΅ΡˆΠ΅Π½ΠΈΡ Ρ…Π΅Ρˆ-Π³ΠΎΠ»ΠΎΠ²ΠΎΠ»ΠΎΠΌΠΊΠΈ Π±Π»ΠΈΠ·ΠΎΠΊ ΠΊ ΠΌΠ½ΠΎΠ³ΠΎΠΊΡ€Π°Ρ‚Π½ΠΎΠΌΡƒ нСзависимому ΠΏΠΎΠ²Ρ‚ΠΎΡ€Π΅Π½ΠΈΡŽ ΡΠ»Π΅Π΄ΡƒΡŽΡ‰Π΅Π³ΠΎ экспСримСнта: ΠΏΡƒΡΡ‚ΡŒ Π·Π°Π΄Π°Π½ΠΎ достаточно большоС ΠΏΠΎ мощности мноТСство (Π½Π°ΠΏΡ€ΠΈΠΌΠ΅Ρ€, состоящСС ΠΈΠ· 2" элСмСнтов, для достаточно большого ΠΏ), Ρ‚ΠΎΠ»ΡŒΠΊΠΎ Π½Π΅Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½Π°Ρ Ρ‡Π°ΡΡ‚ΡŒ элСмСнтов ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ³ΠΎ ΠΎΠ±Π»Π°Π΄Π°Π΅Ρ‚ ΠΎΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½Π½Ρ‹ΠΌ свойством. ЭкспСримСнт состоит Π² Ρ€Π°Π²Π½ΠΎΠΌΠ΅Ρ€Π½ΠΎΠΌ Π²Ρ‹Π±ΠΎΡ€Π΅ элСмСнта ΠΈΠ· этого мноТСства с ΠΏΠΎΡΠ»Π΅Π΄ΡƒΡŽΡ‰Π΅ΠΉ ΠΏΡ€ΠΎΠ²Π΅Ρ€ΠΊΠΎΠΉ наличия Ρƒ Π½Π΅Π³ΠΎ ΡƒΠΊΠ°Π·Π°Π½Π½ΠΎΠ³ΠΎ свойства. Π’Π°ΠΊΠΈΠΌ ΠΎΠ±Ρ€Π°Π·ΠΎΠΌ, процСсс Ρ€Π΅ΡˆΠ΅Π½ΠΈΡ Ρ…Π΅Ρˆ-Π³ΠΎΠ»ΠΎΠ²ΠΎΠ»ΠΎΠΌΠΊΠΈ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ Π·Π°ΠΌΠ΅Π½Π΅Π½, Π½Π°ΠΏΡ€ΠΈΠΌΠ΅Ρ€, поиском Ρ€Π΅Π΄ΠΊΠΈΡ… астрономичСских ΠΎΠ±ΡŠΠ΅ΠΊΡ‚ΠΎΠ² ΠΈΠ»ΠΈ поиском ΠΏΠΎΠ·ΠΈΡ†ΠΈΠΉ ΠΈΠ³Ρ€Ρ‹ Π“ΠΎ, ΡƒΠ΄ΠΎΠ²Π»Π΅Ρ‚Π²ΠΎΡ€ΡΡŽΡ‰ΠΈΡ… ΠΎΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½Π½Ρ‹ΠΌ условиям. ΠšΡ€ΠΎΠΌΠ΅ Ρ‚ΠΎΠ³ΠΎ, ΠΌΡ‹ описываСм Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΡƒΡŽ Π°Ρ‚Π°ΠΊΡƒ Π½Π° Π±Π»ΠΎΠΊΡ‡Π΅ΠΉΠ½-систСму, Π² ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠΉ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌ Π³Π΅Π½Π΅Ρ€Π°Ρ†ΠΈΠΈ ΠΈΠ½Π΄ΠΈΠ²ΠΈΠ΄ΡƒΠ°Π»ΡŒΠ½Ρ‹Ρ… прСдставитСлСй Π·Π°Π΄Π°Ρ‡ для обСспСчСния Ρ€Π°Π±ΠΎΡ‚ΠΎΠΉ Π·Π°ΠΌΠ΅Π½Π΅Π½ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠΎΠΌ Π²Ρ‹Π±ΠΎΡ€Π° ΠΈΠ½Π΄ΠΈΠ²ΠΈΠ΄ΡƒΠ°Π»ΡŒΠ½Ρ‹Ρ… прСдставитСлСй ΠΈΠ· ΠΈΠΌΠ΅ΡŽΡ‰Π΅ΠΉΡΡ Π±Π°Π·Ρ‹ Π΄Π°Π½Π½Ρ‹Ρ…, со стороны нСдобросовСстных поставщиков ΠΈΠ½Π΄ΠΈΠ²ΠΈΠ΄ΡƒΠ°Π»ΡŒΠ½Ρ‹Ρ… прСдставитСлСй Π·Π°Π΄Π°Ρ‡, Π² случаС ΠΈΡ… ΠΏΡƒΠ±Π»ΠΈΡ‡Π½ΠΎΠ³ΠΎ сбора, ΠΈ обсуТдаСм Π½Π΅ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ способы Π·Π°Ρ‰ΠΈΡ‚Ρ‹ ΠΎΡ‚ этой Π°Ρ‚Π°ΠΊΠΈ

    Changes in mRNA expression of members of TGFB1-associated pathways in human leukocytes during EBV infection

    Get PDF
    Transforming growth factor Ξ² 1 (TGFB1) likely contributes to the pathogenesis of Epstein-Barr virus (EBV)-mediated cancer. A microarray containing 59 probes for detecting mRNA of members of TGFB1-associated pathways was developed. mRNA expression of TGFB1 receptors and members of connected pathways were examined in peripheral blood leukocytes of patients during acute EBV infection and after recovery. TGFB1 and TGFBR2 mRNA expression was increased in patients with EBV infection. Similarly, mRNA expression of protein kinase C (PRKCB), MAP3K7, PDLIM7, and other members of TGFB1 and NF-ΞΊB signaling pathways increased. A shift of mRNA transcript variant expression of some key members (TGFBR2, PRKCB, and NFKBIB) of involved signaling pathways was detected. After the patients’ recovery, most of the altered mRNA expression has been normalized. We speculate that in patients with EBV infection, members of TGFB1-associated pathways contribute to the suppression of proapoptotic and induction of pro-survival factors in leukocytes. The modulation of TGFB1-associated pathways may be considered as a potential risk factor in the development of EBV-associated tumors in patients with acute EBV infection

    ЭкологичСскоС обоснованиС формирования систСмы озСлСнСния ΠΊΡ€ΡƒΠΏΠ½ΠΎΠ³ΠΎ Π³ΠΎΡ€ΠΎΠ΄Π°

    No full text
    ΠŸΡ€Π΅Π΄ΠΌΠ΅Ρ‚ исслСдования: экологичСскоС обоснованиС озСлСнСния ΠΊΡ€ΡƒΠΏΠ½ΠΎΠ³ΠΎ Π³ΠΎΡ€ΠΎΠ΄Π° Π² Ρ€Π°ΠΌΠΊΠ°Ρ… формирования условий Π΅Π³ΠΎ устойчивого развития. Π¦Π΅Π»ΠΈ: Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΈΠΊΠΈ опрСдСлСния ΠΏΡ€ΠΈΠΎΡ€ΠΈΡ‚Π΅Ρ‚ΠΎΠ² провСдСния ΠΎΠ·Π΅Π»Π΅Π½ΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… Ρ€Π°Π±ΠΎΡ‚ с Ρ†Π΅Π»ΡŒΡŽ ΠΌΠΈΠ½ΠΈΠΌΠΈΠ·Π°Ρ†ΠΈΠΈ рисков причинСния ΡƒΡ‰Π΅Ρ€Π±Π° ΠΎΠΊΡ€ΡƒΠΆΠ°ΡŽΡ‰Π΅ΠΉ срСдС ΠΈ Π·Π΄ΠΎΡ€ΠΎΠ²ΡŒΡŽ насСлСния. ΠœΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Ρ‹ ΠΈ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹: статистичСскиС ΠΈ картографичСскиС Π΄Π°Π½Π½Ρ‹Π΅, Π½Π°Ρ‚ΡƒΡ€Π½Ρ‹Π΅ исслСдования инсоляционного Ρ€Π΅ΠΆΠΈΠΌΠ° ΠΈ влаТностных характСристик, ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ†ΠΈΠΎΠ½Π½ΠΎ-Π³Ρ€Π°Π΄ΠΎΡΡ‚Ρ€ΠΎΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Π΅ ΠΈ Ρ‚Π΅Ρ…Π½ΠΎΠ³Π΅Π½Π½Ρ‹Π΅ Π½ΡŽΠ°Π½ΡΡ‹, ΠΎΠ±ΡƒΡΠ»ΠΎΠ²Π»ΠΈΠ²Π°ΡŽΡ‰ΠΈΠ΅ ΡΠΊΠΎΡΠΈΡ‚ΡƒΠ°Ρ†ΠΈΡŽ ΠΌΠΈΠ»Π»ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΡ€ΠΎΠΌΡ‹ΡˆΠ»Π΅Π½Π½ΠΎΠ³ΠΎ Π³ΠΎΡ€ΠΎΠ΄Π° (Π½Π° ΠΏΡ€ΠΈΠΌΠ΅Ρ€Π΅ Π’ΠΎΠ»Π³ΠΎΠ³Ρ€Π°Π΄Π°). ΠœΠ΅Ρ‚ΠΎΠ΄Ρ‹ исслСдования - статистичСский ΠΈ ΠΊΠ°Ρ€Ρ‚ΠΎΠ³Ρ€Π°Ρ„ΠΎ-коррСляционный Π°Π½Π°Π»ΠΈΠ·, Π³Π΅ΠΎΠΈΠ½Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΎΠ½Π½ΠΎΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅, ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΈΠΊΠΈ ΠΎΡ†Π΅Π½ΠΊΠΈ распространСния загрязнСний Π½Π° мСстности. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹: построСны Π»ΠΎΠΊΠ°Π»ΡŒΠ½Ρ‹Π΅ ΠΈ сводная ΠΊΠ°Ρ€Ρ‚Ρ‹ загрязнСния атмосфСрного Π²ΠΎΠ·Π΄ΡƒΡ…Π° Π³. Π’ΠΎΠ»Π³ΠΎΠ³Ρ€Π°Π΄Π° выбросами ΠΏΡ€ΠΎΠΌΡ‹ΡˆΠ»Π΅Π½Π½Ρ‹Ρ… прСдприятий с ΠΎΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ΠΌ Π³Ρ€Π°Π½ΠΈΡ† загрязнСния ΠΈ насСлСния ΠΏΠΎΠ΄ воздСйствиСм; ΠΎΡ†Π΅Π½Π΅Π½Ρ‹ Π·ΠΎΠ½Ρ‹ ΡˆΡƒΠΌΠΎΠ²ΠΎΠ³ΠΎ загрязнСния ΠΈ рассСивания оксида ΡƒΠ³Π»Π΅Ρ€ΠΎΠ΄Π° ΠΎΡ‚ автотранспорта (Π΄ΠΎ 180 ΠΌ), Π° Ρ‚Π°ΠΊΠΆΠ΅ выявлСно Π±ΠΎΠ»Π΅Π΅ высокоС содСрТаниС тяТСлых ΠΌΠ΅Ρ‚Π°Π»Π»ΠΎΠ² Π² ΠΏΠΎΡ‡Π²Π°Ρ… Π²Π±Π»ΠΈΠ·ΠΈ магистралСй с большим ΠΏΡ€ΠΎΡ†Π΅Π½Ρ‚ΠΎΠΌ Π³Ρ€ΡƒΠ·ΠΎΠ²ΠΎΠ³ΠΎ транспорта Π² ΠΏΠΎΡ‚ΠΎΠΊΠ΅; выявлСно ΡƒΠ³Π½Π΅Ρ‚Π΅Π½Π½ΠΎΠ΅ состояниС систСмы городского озСлСнСния ΠΈ Π½ΠΈΠΆΠ΅ Π½ΠΎΡ€ΠΌΠ°Ρ‚ΠΈΠ²Π½ΠΎΠΉ ΠΎΠ±Π΅ΡΠΏΠ΅Ρ‡Π΅Π½Π½ΠΎΡΡ‚ΡŒ насСлСния насаТдСниями ΠΎΠ±Ρ‰Π΅Π³ΠΎ пользования. УстановлСно, Ρ‡Ρ‚ΠΎ санитарно-Π·Π°Ρ‰ΠΈΡ‚Π½Ρ‹Π΅ Π·ΠΎΠ½Ρ‹ Π½Π΅ ΠΈΠΌΠ΅ΡŽΡ‚ Π΄ΠΎΠ»ΠΆΠ½ΠΎΠΉ плотности Π·Π΅Π»Π΅Π½ΠΎΠΉ массы. ВыявлСны прямыС коррСляционныС связи ΠΌΠ΅ΠΆΠ΄Ρƒ уровнями загрязнСния ΠΈ показатСлями заболСваСмости, Π° Ρ‚Π°ΠΊΠΆΠ΅ ΠΎΠ±Ρ€Π°Ρ‚Π½Ρ‹Π΅ зависимости ΠΌΠ΅ΠΆΠ΄Ρƒ уровнями заболСваСмости ΠΈ ΡΡ‚Π΅ΠΏΠ΅Π½ΡŒΡŽ озСлСнСнности. Π Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½ авторский Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌ подсчСта коэффициСнта потрСбности Π² ΠΎΠ·Π΅Π»Π΅Π½Π΅Π½ΠΈΠΈ, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹ΠΉ позволяСт ΠΎΡ†Π΅Π½ΠΈΡ‚ΡŒ ΡΠΊΠΎΠ»ΠΎΠ³ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ ΠΊΠ°Ρ€Ρ‚ΠΈΠ½Ρƒ Π°Π½Π°Π»ΠΈΠ·ΠΈΡ€ΡƒΠ΅ΠΌΠΎΠΉ Ρ‚Π΅Ρ€Ρ€ΠΈΡ‚ΠΎΡ€ΠΈΠΈ, Π΅Π΅ ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΠ°Π» для проТивания/ΠΎΡ‚Π΄Ρ‹Ρ…Π° Π³ΠΎΡ€ΠΎΠΆΠ°Π½ Π±Π΅Π· риска причинСния прямого Π²Ρ€Π΅Π΄Π° ΠΈΠ»ΠΈ ΠΎΡ‚Π΄Π°Π»Π΅Π½Π½Ρ‹Ρ… послСдствий для Π·Π΄ΠΎΡ€ΠΎΠ²ΡŒΡ, Π° Ρ‚Π°ΠΊΠΆΠ΅ ΠΏΠΎΡ‚Ρ€Π΅Π±Π½ΠΎΡΡ‚ΡŒ Π² ΠΎΠΏΠ΅Ρ€Π°Ρ‚ΠΈΠ²Π½ΠΎΠΉ Ρ€Π΅Π°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ срСдозащитных мСроприятий Π² Π²ΠΈΠ΄Π΅ озСлСнСния. Π’Ρ‹Π²ΠΎΠ΄Ρ‹: 1) Π² Π’ΠΎΠ»Π³ΠΎΠ³Ρ€Π°Π΄Π΅ Ρ‡Π΅Ρ‚ΠΊΠΎ ΡΡ„ΠΎΡ€ΠΌΠΈΡ€ΠΎΠ²Π°Π»ΠΈΡΡŒ ΠΎΡ‡Π°Π³ΠΈ экологичСского нСблагополучия, ΠΏΡ€ΠΈ нСблагоприятных мСтСоусловиях Π²ΠΎΠ·Π΄Π΅ΠΉΡΡ‚Π²ΠΈΡŽ Π±ΡƒΠ΄ΡƒΡ‚ ΠΏΠΎΠ΄Π²Π΅Ρ€Π³Π°Ρ‚ΡŒΡΡ Π½Π΅ ΠΌΠ΅Π½Π΅Π΅ 120 тыс. Ρ‡Π΅Π».; 2) ΠΎΠ·Π΅Π»Π΅Π½Π΅Π½ΠΈΠ΅ находится Π² ΡƒΠ³Π½Π΅Ρ‚Π΅Π½Π½ΠΎΠΌ состоянии, Π° ΠΎΠ±Π΅ΡΠΏΠ΅Ρ‡Π΅Π½Π½ΠΎΡΡ‚ΡŒ насСлСния насаТдСниями ΠΎΠ±Ρ‰Π΅Π³ΠΎ пользования Π½ΠΈΠΆΠ΅ Π½ΠΎΡ€ΠΌΠ°Ρ‚ΠΈΠ²Π½ΠΎΠ³ΠΎ уровня Π² 2,5 Ρ€Π°Π·Π° Π² Ρ†Π΅Π»ΠΎΠΌ ΠΏΠΎ Π³ΠΎΡ€ΠΎΠ΄Ρƒ ΠΈ 3-4 Ρ€Π°Π·Π° Π² ΠΎΡ‚Π΄Π΅Π»ΡŒΠ½Ρ‹Ρ… административных Ρ€Π°ΠΉΠΎΠ½Π°Ρ…; 3) выявлСнныС коррСляционныС связи ΡΠ²ΠΈΠ΄Π΅Ρ‚Π΅Π»ΡŒΡΡ‚Π²ΡƒΡŽΡ‚ ΠΎ Π½Π΅Π³Π°Ρ‚ΠΈΠ²Π½ΠΎΠΌ влиянии Ρ‚Π΅Ρ…Π½ΠΎΠ³Π΅Π½Π½Ρ‹Ρ… Ρ„Π°ΠΊΡ‚ΠΎΡ€ΠΎΠ² воздСйствия ΠΈ компСнсационном ΠΏΠΎΡ‚Π΅Π½Ρ†ΠΈΠ°Π»Π΅ общСдоступной систСмы городского озСлСнСния; 4) Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π½Ρ‹ΠΉ авторский Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌ подсчСта коэффициСнта потрСбности Π² ΠΎΠ·Π΅Π»Π΅Π½Π΅Π½ΠΈΠΈ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ» провСсти комплСксноС экологичСскоС Π·ΠΎΠ½ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ Π³. Π’ΠΎΠ»Π³ΠΎΠ³Ρ€Π°Π΄Π°, ΠΎΠΏΡ€Π΅Π΄Π΅Π»ΠΈΡ‚ΡŒ ΠΏΡ€ΠΈΠΎΡ€ΠΈΡ‚Π΅Ρ‚Ρ‹ Π² ΠΏΡ€ΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠΈ срСдозащитных Ρ€Π°Π±ΠΎΡ‚ ΠΈ с экологичСской Ρ‚ΠΎΡ‡ΠΊΠΈ зрСния ΡΡ‚Ρ€ΡƒΠΊΡ‚ΡƒΡ€ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ ΠΊΠΎΠ½Ρ†Π΅ΠΏΡ†ΠΈΠΈ развития городской систСмы озСлСнСния

    Simulation of ultrafast bursts of subpicosecond pulses: In pursuit of efficiency

    Get PDF
    Using a hydrodynamic two-temperature model, we simulate multi-pulse laser ablation of an aluminum bulk target. The results of modeling demonstrate that the effectiveness of the multi-pulse ablation increases an order of magnitude in comparison to a single-pulse ablation of the same energy, while the repetition rate grows up to several GHz because the material surface does not cool down substantially between successive pulses. To prevent the shielding and suppression effects, the fluence of each pulse in the burst should have a subthreshold value to avoid the generation of slow moving ablated condensed-phase nanolayers. The obtained results are consistent with recent experiments on ablation by ultrafast bursts of ultrashort pulses

    A check-list of Geometridae (Insecta, Lepidoptera) of the Tyumen Region of Russia

    Get PDF
    A list of 247 species of Geometrid moths from 5 subfamilies (Archiearinae – 3 species, Ennominae – 70 species, Geometrinae – 9 species, Larentiinae – 132 species, Sterrhinae – 33 species) from the territory of Tyumen Region (including Yamalo-Nenets Autonomous Okrug and Khanty-Mansy Autunomous Okrug) is given. 86 species are reported for the first time. The historical overview of the Geometridae study in the Tyumen Region provided

    On the Issue of Using β€œUseful” Tasks for Proof of Works in Blockchain

    No full text
    This paper is a logical continuation of the paper about possible approaches to solving the β€œUseful Proof-of-work for blockchains” problem. We suggest some alternative ways for searching useful tasks for Proof-of-work systems. These ways are based on the process of the multiple and independent repetition of a simple experiment. The experiment is to chose an element independently and uniformly from a quite large set and then to check if the chosen element has a specific rare property. In the classic blockchain of Bitcoin this experiment is a so-called hash-puzzle. In these terms the process of solving a hash-puzzle may be replaced by searching rare astronomical objects or Go positions with specific conditions. Moreover, we describe a possible attack on the blockchain systems in which the task instance generation algorithm is replaced by the algorithm of selecting the task instance from the existing database with public access for publication of task instances and discuss the way of protection

    Reaction pathway and kinetic study of 4,5-dihydroxyimidazolidine-2-thione synthesis by HPLC and NMR

    No full text
    Process of 4,5-dihydroxyimidazolidine-2-thione (DHIT) synthesis from thiourea and glyoxal is studied. Formation of imidazole-2-thiones and 4,5-dihydroxyimidazolidin-2-one as byproducts is confirmed by NMR. The kinetics of the scalable DHIT synthesis process is studied by HPLC, and the kinetic parameters of the model based on the proposed reaction scheme are calculated. The model correctly describes the kinetics of the DHIT formation and thiourea consumption

    Zinc Oxide Nanoparticles Protected with Terpenoids as a Substance in Redox Imbalance Normalization in Burns

    No full text
    Preliminary protection of zinc oxide nanoparticles (ZnO NPs) with terpenoids such as betulin, its derivatives, and essential oils components has been proposed to produce gel-like oleophilic and hydrophilic formulations. We studied the properties of gel-like dispersions of ZnO NPs with immobilized terpenoids and their effects on the activity of LDH, GR, G6PDH, restoration of redox balance of co-enzyme pairs NAD+/NADH and NADP+/NADPH, as well as the activity of SOD, catalase, AlDH in erythrocytes in the treatment of burns in rats. Hysteresis loops on the rheograms of studied dispersions characterize their thixotropic properties. ZnO NPs with betulin diphosphate in the water–ethanol medium lead to a 20-fold increase in the hydrodynamic radius at pH 7.3 compared to the initial ZnO NPs, and facilitate the formation of Zn2+ ions and their penetration into the viable epidermis, unlike oleophilic dispersions. All dispersions reduce the healing time by one and a half times compared with the untreated control group, increase the activity of LDH, GR, G6PDH, SOD, catalase, AlDH, and contribute to the normalization of coenzyme balance. Normalization of the redox balance and wound state was more effective using hydrophilic dispersions due to Zn2 + penetration
    corecore