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Anterior Bone Loss in Cervical Disc Arthroplasty
David Christopher Kieser,Derek Thomas Cawley,Takashi Fujishiro,Celeste Tavolaro,Simon Mazas,Louis Boissiere,Ibrahim Obeid,Vincent Pointillart,Jean Marc Vital,Olivier Gille 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.1
Study Design: Retrospective, longitudinal observational study. Purpose: To describe the natural history of anterior bone loss (ABL) in cervical disc arthroplasty (CDA) and introduce a classification system for its assessment. Overview of Literature: ABL has recently been recognized as a complication of CDA, but its cause and clinical effects remain unknown. Methods: Patients with non-keeled CDA (146) were retrospectively reviewed. X-rays were examined at 6 weeks, 3, 6, 9, 12, 18, and 24 months, and annually thereafter for a minimum of 5 years. These were compared with the initial postoperative X-rays to determine the ABL. Visual Analog Scale pain scores were recorded at 3 months and 5 years. Neck Disability Index was recorded at postoperative 5 years. The natural history was determined and a classification system was introduced. Results: Complete radiological assessment was available for 114 patients with 156 cervical disc replacements (CDRs) and 309 endplates (average age, 45.3 years; minimum, 28 years; maximum, 65 years; 57% females). ABL occurred in 57.1% of CDRs (45.5% mild, 8.3% moderate, and 3.2% severe) and commenced within 3 months of the operation and followed a benign course, with improvement in the bone stock after initial bone resorption. There was no relationship between ABL degree and pain or functional outcome, and no implants were revised. Conclusions: ABL is common (57.1%). It occurs at an early stage (within 3 months) and typically follows a non-progressive natural history with stable radiographic features after the first year. Most ABL cases are mild, but severe ABL occurs in approximately 3% of CDAs. ABL does not affect the patients’ clinical outcome or the requirement for revision surgery. Surgeons should thus treat patients undergoing CDA considering ABL.
César Hidalgo-García,José Miguel Tricás-Moreno,Orosia Lucha-López,Elena Estebanezde Miguel,Elena Bueno-Gracia,Silvia Pérez-Guillén,Pablo Fanlo-Mazas,Alazne Ruiz-de-Escudero,John Krauss 국제물리치료학회 2016 Journal of International Academy of Physical Ther Vol.7 No.1
The purpose of this study is to explore the effects of mobilization of C0-C1 and C7-T1 applied to asymptomatic individuals with reduced upper cervical rotation during the FRT. Design: parallel randomized controlled trial. 48 subjects(38.52 years±15.13) with C1-C2 rotation hypomobility in TFR joined the study and were randomized into three groups(C0, C7, control group). FRT in both directions was measured before and after the intervention. C0 intervention consisted of a dorsal translatoric mobilization of C0-C1 in the cervical neutral position. C7 intervention consisted of a ventral cranial translatoric mobilization of C7- T1 in neutral position and the control group maintained a supine position. C0 group experienced a FRT ROM to the restricted side increase of 17.64。(SD=4.55), that was significantly greater (P<0.001) than 5.95。 (SD=4.81) of the C7 group and 2.45。(SD=5.05) of the control group. The results showed that a dorsal translatoric mobilization of C0-C1 in neutral position restored the physiological FRT mobility in subjects with C1-C2 hypomobility and experienced statistical significant improvement in FRT as compared to a C7-T1 translatoric mobilization and a control group. (Level of evidence: 1b).
Hidalgo-Garcia, Cesar,Tricas-Moreno, Jose Miguel,Lucha-Lopez, Orosia,Estebanezde-Miguel, Elena,Bueno-Gracia, Elena,Malo-Urries, Miguel,Perez-Guillen, Silvia,Fanlo-Mazas, Pablo,Ruiz-de-Escudero, Alazne International Academy of Physical Therapy Research 2016 Journal of International Academy of Physical Ther Vol.7 No.1
The purpose of this study is to explore the effects of mobilization of C0-C1 and C7-T1 applied to asymptomatic individuals with reduced upper cervical rotation during the FRT. Design: parallel randomized controlled trial. 48 subjects(38.52 years${\pm}15.13$) with C1-C2 rotation hypomobility in TFR joined the study and were randomized into three groups(C0, C7, control group). FRT in both directions was measured before and after the intervention. C0 intervention consisted of a dorsal translatoric mobilization of C0-C1 in the cervical neutral position. C7 intervention consisted of a ventral cranial translatoric mobilization of C7-T1 in neutral position and the control group maintained a supine position. C0 group experienced a FRT ROM to the restricted side increase of $17.64^{\circ}$(SD=4.55), that was significantly greater (P<0.001) than $5.95^{\circ}$(SD=4.81) of the C7 group and $2.45^{\circ}$(SD=5.05) of the control group. The results showed that a dorsal translatoric mobilization of C0-C1 in neutral position restored the physiological FRT mobility in subjects with C1-C2 hypomobility and experienced statistical significant improvement in FRT as compared to a C7-T1 translatoric mobilization and a control group. (Level of evidence: 1b).
Feature Selection Algorithms in Intrusion Detection System: A Survey
( Sofiane Maza ),( Mohamed Touahria ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.10
Regarding to the huge number of connections and the large flow of data on the Internet, Intrusion Detection System (IDS) has a difficulty to detect attacks. Moreover, irrelevant and redundant features influence on the quality of IDS precisely on the detection rate and processing cost. Feature Selection (FS) is the important technique, which gives the issue for enhancing the performance of detection. There are different works have been proposed, but a map for understanding and constructing a state of the FS in IDS is still need more investigation. In this paper, we introduce a survey of feature selection algorithms for intrusion detection system. We describe the well-known approaches that have been proposed in FS for IDS. Furthermore, we provide a classification with a comparative study between different contribution according to their techniques and results. We identify a new taxonomy for future trends and existing challenges.
The Mexican Economic Crisis of 1982 and the Brazilian Economic Crisis of 1999
Ana Ligia Haro Maza(아나 리히아 아로 마사),John Hogan(존호건) 한국라틴아메리카학회 2009 라틴아메리카연구 Vol.22 No.2
This paper utilises a new critical juncture framework to help us determine whether changes to Mexican macroeconomic policy in the early 1980s, and Brazilian macroeconomic policy at the turn of the century, were clean breaks with the past, or continuations of previously established policy pathways. The framework consists of three elements, which must be identified in sequence in order to declare, with some certainty, if an event was a critical juncture. These are crisis, ideational change, and radical policy change.
Hermann Marius Feumo Feusso,Hermann Marius Feumo Feusso,Hermine Laure Maza Djomkam,Carine Mvot Akak,Mehreen Lateef,Ayaz Ahmed,Anatole Guy Blaise Azebaze,Alain François Kamdem Waffo,Muhammad Shaiq Ali 한국생약학회 2020 Natural Product Sciences Vol.26 No.4
The chemical investigation of the methanolic crude extract of leaves of Diospyros iturensis gave us 15 known secondary metabolites identified as mixture of α-amyrenone (1) and β-amyrenone (2), b-amyrin (3), mixture of β-sitosterol (4) and stigmasterol (5), betulin (6), uvaol (7), betulinic acid (8), ursolic acid (9), corosolic acid (10), actinidic acid (11),11-O-p-hydroxybenzoylbergenin (12), bergenin (13) and mixture of stigmasterol glucoside (14) and β-sitosterol glucoside (15) respectively. The structures of secondary metabolites were elucidated with the help of NMR and mass spectral data and by comparison of their spectral data with literature. Among the fifteen isolated compounds, four compounds were identified for the first time in Diospyros genus. These included uvaol (7), corosolic acid (10), actinidic acid (11) and 11-O-p-hydroxybenzoylbergenin (12). Crude methanolic extract of leaves and four isolated compounds including betulin (6), betulinic acid (8), 11-O-p-hydroxybenzoylbergenin (12) and bergenin (13) were evaluated for their antiproliferative activity against two cancer cell lines CAL-27 and NCI-H460 by the MTT assay, antioxidant potential and inhibitory activity against the lipoxygenase and urease enzymes, respectively. The results indicated that the methanolic crude extract of leaves exhibited moderate antioxidant activity and was inactive against the two cancer cell lines. Betulin (6), 11-O-p-hydroxybenzoylbergenin (12) and bergenin (13) exhibited moderate antioxidant and lipoxygenase inhibition with IC50 = 65.8, 85.6, 82.5 µM and IC50 = 58.5, 95.2, 76.2 µM, respectively. Furthermore, 11-O-p-hydroxyben- zoylbergenin (12) and bergenin (13) exhibited moderate urease inhibition activity with IC50 values of 45.6 µM and 49.8 µM, respectively.