2,151 research outputs found
Data for: Experimental Investigations on Dating the Last Earthquake Event using OSL Signals of Quartz from Fault Gouges
No full textRaw data files for experimental rock deformatio
An aural myiasis case in a 54-year-old male farmer in Korea
No full textA 54-year-old male farmer residing in Chunchon, Korea, complaining of blood tinged discharge and tinnitus in the left ear for two days, was examined in August 16, 1996. Otoscopic examination revealed live maggots from the ear canal. The patient did not complain of any symptoms after removal of maggots. Five maggots recovered were identified as the third stage larvae of Lucilia sericata (Diptera: Calliphoridae). This is the first record of aural myiasis in Korea.ope
Appendix – Supplemental material for Joint Growth Trajectories of Bullying Perpetration and Victimization Among Korean Adolescents: Estimating a Second-Order Growth Mixture Model–Factor-of-Curves With Low Self-Control and Opportunity Correlates
No full textSupplemental material, Appendix for Joint Growth Trajectories of Bullying Perpetration and Victimization Among Korean Adolescents: Estimating a Second-Order Growth Mixture Model–Factor-of-Curves With Low Self-Control and Opportunity Correlates by Sujung Cho and Jin Ree Lee in Crime & Delinquency</p
An infestation of the mite Sancassania berlesei (Acari: Acaridae) in the external auditory canal of a Korean man
No full textWe here report the case of a storage mite, Sancassania berlesei, infestation in the external auditory canal of a 46-yr-old male. He complained of feeling a foreign body and itching in the left external auditory canal for 1 mo, with accompanying otalgia for 3 days. Considering the duration of the patient's complaint and the 8-9-day life cycle of the mite, the mites are believed to have lived in the patient's ear for more than 3 generations.ope
Data for the article: Fault reactivation and propagation during the 2017 Pohang earthquake sequence
No full textData for Ree et al. in Geophysical Research Letter: Fault reactivation and propagation during the 2017 Pohang earthquake sequence
(1) Earthquake catalog
Earthquake catalog from 15 November 2017 and 20 November 2018 in the Pohang area. Earthquake source parameters are relocated by HypoDD. The table is in the following format: yyyy mm dd HH MM SS.SS Magnitude Latitude Longitude Depth
Magnitude scale: ML; Latitude: °N; Longitude: °E; Depth: km
(2) File of Movie S1 in Supporting Informatio
High temperature polyimide thin films: The effect of photosensitive (DMAEM) precursor and different backbone structures on water sorption
No full textThree different polyimide films, BPDA-PDA, PMDA-ODA, and BTDA-ODA, were prepared from amic acid and photosensitive(DMAEM) precursors. The effect of backbone structures and precursors on the water sorption and the morphological structure in polyimide thin films was investigated. Gravimetric technique was employed to study the water sorption kinetics and wide angle x-ray diffraction (WAXD) technique for the morphological structure investigation of fully cured polyimide thin films. PMDA-ODA, BPDA-PDA and BTDA-ODA polyimide films prepared from amic acid precursor exhibited water diffusivities of 10.5 x 10(-10) cm(2)sec(-1), 1.4 x 10(-10) cm(2)sec(-1), and 10 x 10(-10) cm(2)sec(-1), respectively. For the linear BPDA-PDA polyimide, photosensitive(DMAEM) precursor distrupted the packing order in the microstructure. The disordered structure of polyimide thin film affected significantly the water sorption kinetics. The diffusivity of water in BPDA-PDA polyimide thin film prepared from photosensitive precursor was increased to 5.0 x 10(-10) cm(2)sec(-1). However, for the hinged PMDA-ODA and BTDA-ODA polyimide thin films prepared from photosensitive precursor no significant changes were observed in the morphological structure and water sorption kinetics.X1110sciescopu
New high performance digital memory devices fabricated with DNA and DNA-mimics
No full textWe report the first digital nonvolatile memory devices fabricated with DNA and DNA-mimicking brush polymers. Salmon testes and calf thymus DNA devices, as well as DNA-mimicking brush polymer devices revealed p-type unipolar write-once-read-many-times memory behaviors with low switching-on voltage and high ON/OFF current ratio. Such permanent memory characteristics were confirmed to originate from the charge trapping and hopping nature of nucleobase moieties. Overall, this study demonstrated that DNA and DNA-mimicking polymers are good candidate materials for the production of p-type permanent memory devices with high performance, high stability and low power consumption.111sciescopu
Structural Characteristics of Amphiphilic Cyclic and Linear Block Copolymer Micelles in Aqueous Solutions
No full textThe structural characteristics of aqueous micelles composed of amphiphilic cyclic poly(n-butyl acrylate-b-ethylene oxide) (cyclic PBA-b-PEO) or a linear analogue (i.e., linear poly(n-butyl acrylate-b-ethylene oxide-b-n-butyl acrylate) (linear PBA-b-PEO-b-PBA)) were examined for the first time using synchrotron X-ray scattering techniques and quantitative data analysis. The scattering data were analyzed using a variety of methodologies in a comprehensive complementary manner. These analyses provided details of the structural information about the micelles. Both micelles were found to consist of a core and a fuzzy shell; however, the cyclic block copolymer had a strong tendency to form micelles with core and shell parts that were more compact and dense than the corresponding parts of the linear block copolymer micelles. The PBA block of the cyclic copolymer was found to form a hydrophobic core with a density that exceeded the density of the homopolymer in the bulk state. The structural differences originated primarily from the topological difference between the cyclic and linear block copolymers. The elimination of the chain end groups (which introduced entropy and increased the excess excluded volume) from the amphiphilic block copolymer yielded more stable dense micelles in solution.X113125sciescopu
WATER DIFFUSION AND SORPTION IN FILMS OF HIGH-PERFORMANCE POLY(4,4'-OXYDIPHENYLENE PYROMELLITIMIDE) - EFFECTS OF HUMIDITY, IMIDIZATION HISTORY AND FILM THICKNESS
No full textPoly(4,4'-oxydiphenylene pyromellitimide) (PMDA-ODA) films of 10-109 mu m thickness were prepared from its poly(amic acid) precursor by thermal imide-ring-closure formation at various temperatures. Water sorption in the films was measured at 25 degrees C over 22-100% relative humidity using an electromicrobalance. Water diffusion in all the films was a nearly Fickian process despite the morphological heterogeneity due to the ordered and less ordered phases. Depending upon humidity, film thickness and imidization history, the diffusion coefficient and water uptake varied in the ranges of 1 x 10(-9) to 3 x 10(-9) cm(2) s(-1) and 0.4 to 4.5 wt%, respectively. Overall, both the diffusion coefficient and the water uptake increased with increasing humidity and film thickness, but decreased as the imidization temperature and time increased. The water sorption results were interpreted by consideration of morphological variations (molecular order, chain orientation and microvoids) due to film thickness and imidization history.X1160sciescopu
EFFECTS OF HUMIDITY, IMIDIZATION HISTORY, AND THICKNESS ON WATER SORPTION BEHAVIOR OF POLY(P-PHENYLENE BIPHENYLTETRACARBOXIMIDE) FILMS
No full textPoly(p-phenylene biphenyltetracarboximide) films with various thicknesses were prepared from the poly(amic acid) precursor by thermal imidization at 230-400 degrees C for 1-10 h under a nitrogen atmosphere. The water sorption in the films was measured at 25 degrees C over 22-100% relative humidity using a Cahn microbalance as a function of film thickness and thermal imidization history. The water diffusion in all the films followed nearly Fickian process despite the morphological heterogeneity due to the ordered and less ordered phases. The diffusion coefficient and water uptake varied in 0.85 X 10(-10) - 7.50 X 10(-10) cm(2)/s and 0.12-2.4 wt %, respectively, depending upon humidity, film thickness, and imidization history. Both diffusion coefficient and water uptake increased with increasing humidity, but decreased as imidization temperature and time increased. With increasing film thickness, the diffusion coefficient increased whereas the water uptake decreased. The water sorption behavior was interpreted with the consideration of morphological variations, such as polymer chain order, in-plane orientation, and intermolecular packing order due to the film thickness and imidization history. (C) 1995 John Wiley & Sons, Inc.X1130sciescopu
- …
