5,975 research outputs found
Opposing roles of sensory and parietal cortices in awareness in a bistable motion illusion.
No full textMotion-induced blindness (MIB) is a bistable visual phenomenon in which stationary disks surrounded by a moving pattern intermittently disappear from the viewer's awareness. We explored the cortical network that subserves the MIB phenomenon by targeting its constituent parts with disruptive transcranial magnetic stimulation (TMS), in the form of continuous theta burst stimulation (cTBS). Previous neuroimaging and TMS studies have implicated the right posterior parietal cortex (rPPC) in perceptual transitions such as binocular rivalry, while the visual area V5/MT has been suggested to play a key role in MIB. In this study, we found that cTBS applied to the rPPC lengthened the duration of disappearance in MIB, while cTBS applied to V5/MT shortened the duration of disappearance and decreased the frequency of disappearance in MIB. These results demonstrate a causal role for both the rPPC and V5/MT in MIB, and suggest that the rPPC is involved in shifting resources between competing functional areas, while V5/MT processing initiates and maintains MIB
Perancangan Sistem Informasi Pengelola Barang/Inventaris Di Jc Komp
Full text linkInventory information system is a system used to enter inventory data into the database, so that there are no errors in input, output data, and reporting based on the desired data. based on surveys and interviews with jc comp personnel, information was obtained that the existing system in the jc comp warehouse section is still manual. therefore, the system that will be created by the author is the result of a replication of the existing system in the jc comp warehouse section. in addition to the process of input and output of goods, this information system is also equipped with features for creating data reports, input and output of goods, and searching for goods data by item name. with the inventory information system is expected to be useful for the warehouse parts jc comp. By implementing this system in the jc comp warehouse, it is hoped that it can reduce errors that may occur. this system is also expected to further speed up the process of input, output, and report generation, which in turn will help the jc comp warehouseSistem Informasi Persediaan Barang adalah sebuah sistem yang digunakan untuk memasukkan data-data persediaan barang ke dalam database, sehinggga tidak terjadi kesalahan dalam input, output data, dan pembuatan laporan berdasarkan data yang diinginkan. Berdasarkan survey dan wawancara dengan bagian personalia Jc Komp, didapatkan informasi bahwa sistem yang ada dibagian gudang Jc Komp masih manual. Oleh karena itu, sistem yang akan dibuat oleh penulis adalah hasil replikasi dari sistem yang telah ada dibagian gudang Jc Comp. Selain proses input dan output barang, pada sistem informasi ini juga dilengkapi fitur pembuatan laporan data, input, dan output barang, dan pencarian data barang berdasarkan nama barang. Dengan adanya Sistem Informasi persediaan barang ini diharapkan dapat bermanfaat bagi bagian gudang Jc Komp. Dengan diterapkannya sistem ini pada bagian gudang Jc Comp, maka diharapkan dapat mengurangi kesalahan-kesalahan yang mungkin terjadi. Sistem ini juga diharapkan dapat lebih mempercepat proses input, output, dan pembuatan laporan yang pada akhirnya dapat membantu bagian gudang Jc Komp
Near-infrared detectors for ITER LIDAR Thomson scattering
No full textIn this paper we discuss strategies for the development of fast photodetectors suitable for operation in the λ > 850 nm near-infrared (NIR) spectral region in the ITER core LIDAR Thomson scattering (TS) system. Detection of this spectral range is necessary if a Nd:YAG laser operating at the fundamental wavelength (λ = 1.06 μm) will be used as the input laser source. Different types of NIR photodetectors are potentially suitable for use in ITER LIDAR TS: the transferred electron (TE) InGaAsP/InP hybrid pho- todiodes and microchannel plate photomultipliers (MCP PMTs), the In(x)Ga(1−x)As MCP image intensifiers and PMTs, and the detectors based on transmission Si photocathodes. But their characteristics of either sensitivity, active area or speed of response, do not match the ITER specifications and all devices require some developmental work. For each of these detector types we review the characteristics of devices presently available and suggest a realistic development strategy suitable to extend their performances to meet the ITER specifications. Finally the expected performance of the ITER LIDAR TS system for different detector choices are compared by calculating the expected signal-to-noise ratio of the measured plasma temperature and density
Enhancement of the JET edge LIDAR Thomson scattering diagnostic with ultrafast detectors
No full textThe edge light detection and ranging (LIDAR) Thomson scattering diagnostic at the Joint European Torus fusion experiment uses a 3 J ruby laser to measure the electron density and temperature profile at the plasma edge. The original system used a 1 GHz digitizer and detectors with response times of ≈650 ps and effective quantum efficiencies <7%. This system has recently been enhanced with the installation of a new 8 GHz digitizer and four new ultrafast GaAsP microchannel plate photomultiplier tube detectors with response times of <300 ps and effective quantum efficiencies in the range of ~13%−20% (averaged over λ=500–700 nm). This upgrade has enabled the spatial resolution to be reduced to ~6.3 cm along the laser line of sight for a laser pulse of 300 ps full width at half maximum, which is close to the requirements for the ITER core LIDAR. Performance analysis shows that the new system will have an effective spatial resolution of up to 1 cm in the magnetic midplane via magnetic flux surface mapping
An Unusual Optic Neuropathy in a Young Man
No full textBlurred vision and pain above right eyeA 28-year old male with a 6-week history of blurred vision and pain above the right eye as a consequence of a blow to the head.VA: 20/25 OD, 20/20 OS; RAPD ODCTSwollen optic disc with necrotic infiltratesSteroids; Surgery; XRT; Intrathecal antineoplastic antimetabolites1. Kline LB, Garcia JH, Harsh GR: Lymphomatous Optic Neuropathy. Arch Ophthalmol 1984: 102; 1655-1657. 2. Purvin V, Van Dyk HJL: Primary Reticulum Cell Sarcoma of the Brain Presenting as Steroid-Responsive Optic Neuropathy. J Clin. Neuro-Ophthalmol1984: 4; 15-23. 3. Kay MC: Optic Neuropathy Secondary to Lymphoma. J Clin. Neuro-Ophthalmol 1986: 6; 31-34. 4. Bullock JD, Yares B, Kelly M, McDonald L: Non-Hodgkins Lymphoma Involving the Optic Nerve. Ann Ophthalmol 1979: 11; 1477-1480. 5. Walsh FB, Shewmake BJ : An Unusual Case of Reticulum Cell Sarcoma. Am J. Ophthalmol 1972: 74; 741-743. 6. Kraus AM, O\u27Rourke J: Lymphomatous Optic Neuritis. Arch Ophthalmol 1963: 70; 173-175. 7. Kattah JC, Suski ET, Killen JY, et al : Optic Neuritis and Systemic Lymphoma. Am J. Ophthalmol. 1980: 89; 431-436. 8. Miller NR, Iliff WJ: Visual Loss As The Initial Symptom in Hodgkin Disease. Arch Ophthalmol 1975: 93; 1158-1161. 9. Litvak J, Leder MM, Kauver AJ : Hodgkin\u27s Disease Involving Optic Nerve and Brain. J. Neurosurg 1964: 21; 798-801. 10. Garrity JA, Kennerdell JS: Bilaterally Enlarged Extraocular Muscles and Thickened Optic Nerve Sheaths. Frank B. Walsh Society (18th) 1986. 11. Kansu T, Orr LS, Savino PJ, Schatz NJ, Corbett J J: Optic Neuropathy as Initial Manifestation of Lymphoreticular Diseases. Neuro-Ophthalmology Focus 1980, JL Smith ed. Masson, New York, 1980: pp. 125-136. 12. Todd FD, Miller CA, Yates AJ, Mervis LJ : Steroid-Induced Remission in Primary Malignant Lymphoma of the Central Netvous System. Surg Neurol 1986: 26; 79-84. 13. Kikuchi K, Watanabe K, et. al: Steroid-Induced Regression of Primary Malignant Lymphoma of the Brain. Surg Neurol 1986: 26; 291-296
Amenable L-2-Theoretic Methods and Knot Concordance
No full textWe reveal new structures in the topological knot concordance group. As a key ingredient, we develop obstructions using L-2-theoretic methods for amenable groups in Strebel's class recently introduced by Orr and the author. Concerning (h)-solvable knots, which are defined in terms of certain Whitney towers of height h in bounding 4-manifolds, we show the following: for any n>1, there are (n)-solvable but non-(n. 5)-solvable (and therefore nonslice) knots, which are not detected by prior methods using Cochran-Orr-Teichner L-2-signature obstructions as well as Levine algebraic obstructions and Casson-Gordon invariants.X1197sciescopu
Dynamics of Network Formation Processes in the Co-Author Model
Full text linkThis article studies the dynamics in the formation processes of a mutual consent network in game theory setting: the Co-Author Model. In this article, a limited observation is applied and analytical results are derived. Then, 2 parameters are varied: the number of individuals in the network and the initial probability of the links in the network in its initial state. A simulation result shows a finding that is consistent with an analytical result for a state of equilibrium while it also shows different possible equilibria.Dynamics, Network, Game Theory, Model,Simulation, Equilibrium, Complexity
High-level polyomavirus JC viruria following long-term steroid therapy
No full textCASE REPORT JC virus is a highly seroprevalent ubiquitous polyomavirus which is acquired at an early age through respiratory or oral route, Thereafter JCV establishes persistent, but mainly asymptomatic, infections in various tissues, including the genitourinary tract and brain Corresponding author Cristina Costa, MD S.C.D.U. Virologia Azienda Ospedaliero-Universitaria San Giovanni Battista di Torino Via Santena, 9 -10126 Torino E-mail: [email protected] increasing with age, with adult prevalence rate often between 15% and 60
Engineering Framework to Utilize Miniaturized Charpy Type SE(B) Specimens to Predict Jc of Full Sized Specimens
No full textAbstractThis paper introduces our experience of using miniature Charpy type SE(B) specimen in obtaining fracture toughness Jc of a material in the ductile to brittle transition temperature (DBTT) region. Width W x thickness B of 2 x 2 mm, 3 x 3 mm and 10 x 10 mm were chosen as miniature specimens and 25 x 25 mm were chosen as full sized specimen. 0.55% carbon steel JIS S55C, whose tensile to yield stress ratio σTS/σYS was equal to 1.8 was chosen as a material to simulate a degraded (embrittled) material in the DBTT region. Focus was placed on whether cleavage fracture could be predicted for these miniaturized specimens. Another focus was placed on whether the Jc of full sized specimen is predictable from the test results of the miniature sized specimens, in case cleavage fracture were observed. The results showed that the modified Ritch-Knott-Rice (RKR) failure criterion (which predicts the onset of cleavage fracture when the crack opening stress measured at 4 times the crack-tip opening displacement exceeds this σ22c) could predict whether cleavage fracture would occur or not. Another finding was that, in case cleavage fracture was observed though, the critical value σ22c in the modified RKR failure criterion was independent of specimen size, and thus, Jc of the full sized specimen is predictable from the miniature specimen test results, though M = (W-a)σYS/Jc was smaller than ASTM E1921 requirement of 30. Here, a and σYS are crack length and yield strength, respectively
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