Band Structure and Fermi Surface of an Extremely Overdoped Iron-Based Superconductor KFe2As2 (2008)
Sato, T., Nakayama, K., Sekiba, Y., Richard, P., Souma, S., ...
We have performed high-resolution angle-resolved photoemission spectroscopy on heavily overdoped KFe_2As_2 (transition temperature (Tc = 3 K). We observed several renormalized bands near the Fermi...
Richard, P., Sato, T., Nakayama, K., Souma, S., Takahashi, T., ...
We have performed an angle-resolved photoemission spectroscopy study of the new superconductor Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ in the low energy range. We report the observation of an anomaly around...
Niestemski, F. C., Neupane, M., Richard, P., ...
The superconducting phase of the high-Tc cuprates has been thought to be described by a single d-wave pairing order parameter. Recently, there has been growing evidence suggesting that another form...
Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2 (2008)
Ding, H., Richard, P., Nakayama, K., Sugawara, T., Arakane, T., Sekiba, Y., ...
The recent discovery of superconductivity in iron-arsenic compounds below a transition temperature (Tc) as high as 55K ended the monopoly of copper oxides (cuprates) in the family of high-Tc...
Superconducting Gap and Pseudogap in Iron-Based Layered Superconductor La(O$_{1-x}$F$_x$)FeAs (2008)
Sato, T., Souma, S., Nakayama, K., Terashima, K., Sugawara, K., Takahashi, T., ...
We report high-resolution photoemission spectroscopy of newly-discovered iron-based layered superconductor La(O$_{0.93}$F$_{0.07}$)FeAs (Tc = 24 K). We found that the superconducting gap shows a...
Combined analysis of eta meson hadro- and photo-production off nucleons (2008)
Nakayama, K., Oh, Yongseok, Haberzettl, H.
The $\eta$-meson production in photon- and hadron-induced reactions, namely, $\gamma p \to p \eta$, $\pi^- p \to n\eta$, $pp \to pp\eta$, and $pn \to pn\eta$, are investigated in a combined analysis...
Face detection in normal and prosopagnosic individuals (2008)
Garrido, L., Duchaine, B., Nakayama, K.
Face detection, the process of finding a face in a visual scene, is a critical step in face processing, yet it has received relatively little attention compared with other face processes. The present...
Nucleon and Delta resonances in K Sigma(1385) photoproduction from nucleons (2007)
Oh, Yongseok, Ko, Che Ming, Nakayama, K.
The reaction mechanisms for $K\Sigma(1385)$ photoproduction from the reaction $\gamma p \to K^+\Sigma^{0}(1385)$ in the resonance energy region are investigated in a hadronic model. Both...
Family resemblance: ten family members with prosopagnosia and within-class object agnosia (2007)
Duchaine, B., Germine, L., Nakayama, K.
We report on neuropsychological testing done with a family in which many members report severe face recognition impairments. These ten individuals are high functioning in everyday life and performed...
No global processing deficit in the Navon task in 14 developmental prosopagnosics (2007)
Duchaine, B., Yovel, G., Nakayama, K.
Faces are represented in a more configural or holistic manner than other objects. Substantial evidence indicates that this representation results from face-specific mechanisms, but some have argued...
No global processing deficit in the Navon task in 14 developmental prosopagnosics (2007)
Duchaine, B.C., Yovel, G., Nakayama, K.
Faces are represented in a more configural or holistic manner than other objects. Substantial evidence indicates that this representation results from face-specific mechanisms, but some have argued...
On the sign of the pi-rho-omega coupling constant (2006)
Nakayama, K., Oh, Yongseok, Haidenbauer, J., Lee, T. -S. H.
It is shown that the relative sign between the $NN\omega$ and $\pi\rho\omega$ coupling constants can be determined most sensitively from $\omega$ production processes in $NN$ collisions. Recent data...
Nakayama, K., Sato, T., Terashima, K., Matsui, H., Takahashi, T., Kubota, M., ...
We have performed high-resolution angle-resolved photoemission spectroscopy on YBa2Cu3O7-delta (Y123; delta = 0.06; Tc = 92 K). By accurately determining the Fermi surface and energy band dispersion,...
Nakayama, K., Sato, T., Dobashi, T., Terashima, K., Souma, S., Matsui, H., ...
We have performed systematic angle-resolved photoemission spectroscopy (ARPES) on single-layered cuprate superconductor Bi2Sr2CuO6 to elucidate the origin of shadow band. We found that the shadow...
Duchaine, B., Yovel, G., Butterworth, E., Nakayama, K.
For more than 35 years, researchers have debated whether face recognition is carried out by face-specific mechanisms or whether it involves more general mechanisms that are also used for objects....
Gauge-invariant approach to meson photoproduction including the final-state interaction (2006)
Haberzettl, H., Nakayama, K., Krewald, S.
A fully gauge-invariant (pseudoscalar) meson photoproduction amplitude off a nucleon including the final-state interaction is derived. The approach based on a comprehensive field-theoretical...
Photoproduction of Xi off nucleons (2006)
Nakayama, K., Oh, Yongseok, Haberzettl, H.
The photoproduction reaction $\gamma N \to K K \Xi$ is investigated based on a relativistic meson-exchange model of hadronic interactions. The production amplitude is calculated in the tree-level...
Developmental prosopagnosia: a window to content-specific face processing (2006)
Developmental prosopagnosia is characterized by severely impaired face recognition. Individuals with this disorder, which often runs in families, have no history of brain damage and intact early...
The two standardized tests of face recognition that are widely used suffer from serious shortcomings [Duchaine, B. & Weidenfeld, A. (2003). An evaluation of two commonly used tests of unfamiliar face...
Gauge-Invariant Approach to Meson Photoproduction Including the Final-State Interaction (2005)
Haberzettl, H., Nakayama, K., Krewald, S.
A gauge-invariant formalism is presented for the practical treatment of photo- and electroproduction of pseudoscalar mesons off nucleons that allows an explicit incorporation of hadronic final-state...
Analyzing $\eta'$ Photoproduction Data on the Proton at Energies of 1.5--2.3 GeV (2005)
A combined analysis of the existing data on the reactions $\gamma p \to p \eta^\prime $ and $pp \to pp\eta^\prime $, based on a relativistic meson exchange model of hadronic interactions, is...
Photo-excitation of hyperons and exotic baryon in gamma N --> K Anti-K N (2005)
Oh, Yongseok, Nakayama, K., Lee, T. -S. H.
We investigate the reaction of $\gamma N \to K \bar{K} N$ focusing on the photoproduction of $\Lambda(1520)$ and putative exotic $\Theta(1540)$. We consider various background production mechanisms...
Analyzing eta' photoproduction data on the proton at energies of 1.5--2.3 GeV (2005)
The recent high-precision data for the reaction $\gamma p\to p\eta'$ at photon energies in the range 1.5--2.3 GeV obtained by the CLAS collaboration at the Jefferson Laboratory have been analyzed...
Convergence of cell cycle regulation and growth factor signals on GRASP65 (2005)
Yoshimura,S., Yoshioka,K., Barr,F. A., Lowe,M., Nakayama,K., Ohkuma,S., ...
Dissociations of face and object recognition in developmental prosopagnosia (2005)
Neuropsychological studies with patients suffering from prosopagnosia have provided the main evidence for the hypothesis that the recognition of faces and objects rely on distinct mechanisms. Yet...
Convergence of cell cycle regulation and growth factor signals on GRASP65 (2005)
Yoshimura, S., Yoshioka, K., Barr, F. A., Lowe, M., Nakayama, K., Ohkuma, S., ...
Normal and abnormal face selectivity of the M170 response in developmental prosopagnosics (2005)
Harris, A., Duchaine, B., Nakayama, K.
Developmental prosopagnosia is a lifelong impairment in face recognition despite normal low-level visual processing. Here we used magnetoencephalography (MEG) to examine the M170 response, a...
Fundamental characteristics of liquid cluster ion source for surface modification (2005)
Takaoka, GH, Noguchi, H, Nakayama, K, Hironaka, Y, Kawashita, M
Pentaquark Theta^+(1540) production in gamma N --> K Anti-K N (2004)
Oh, Yongseok, Nakayama, K., Lee, T. -S. H.
The recent developments in the search of exotic pentaquark hadrons are briefly reviewed. We then focus on investigating how the exotic pentaquark $\Theta(1540)$ baryon production can be identified in...
Cooperative regulation of the cell division cycle by the protein kinases RAF and AKT (2004)
Mirza, A M, Gysin, S, Malek, N, Nakayama, K, Roberts, J M, McMahon, Martin
The RAS-activated RAF-->MEK-->extracellular signal-regulated kinase (ERK) and phosphatidylinositol 3'-kinase (PI3'-kinase)-->PDK1-->AKT signaling pathways are believed to cooperate to promote the...
Titov, A. I., Ejiri, H., Haberzettl, H., Nakayama, K.
We analyze the problem of how to determine the parity of the $\Theta^+$ pentaquark in the reaction $\gamma N\to K\Theta\to NK\bar{K}$, where $N=n,p$. Our model calculations indicate that the...
Remarks on the parity determination of narrow resonances (2004)
Hanhart, C., Haidenbauer, J., Nakayama, K.
Recently several proposals were put forward to determine the parity of narrow baryonic resonances, in particular the $\Theta^+$. In these proceedings we will briefly comment on the general problems...
Normal Greeble learning in a severe case of developmental prosopagnosia (2004)
Duchaine, B.C., Dingle, K., Butterworth, E., Nakayama, K.
A central question in cognitive neuroscience is whether mechanisms exist that are specialized for particular domains. One of the most commonly cited examples of a domain-specific competence is the...
On the determination of the parity of the $\Theta^+$ (2004)
Hanhart, C., Haidenbauer, J., Nakayama, K.
We critically examine the possibility of determining the parity of the $\Theta^+(1540)$ from the reactions $NN\to \Theta^+Y$ ($Y$ = $\Lambda$, $\Sigma$) recently discussed in the literature....
The most general spin structures of the spin-1/2 baryon and spinless meson production operator for both photon and nucleon induced reactions are derived from the partial-wave expansions of these...
Developmental prosopagnosia and the Benton facial recognition test (2004)
The Benton Facial Recognition Test is used for clinical and research purposes, but evidence suggests that it is possible to pass the test with impaired face discrimination abilities. The authors...
Spin observables in the photoproduction of the $\Theta^+$ are explored for the purpose of determining the parity of the $\Theta^+$. Based on reflection symmetry in the scattering plane, we show that...
Consistent analysis of the reaction $\gamma p \to p \eta^\prime$ and $pp \to pp\eta^\prime$ (2004)
The production of $\eta'$ mesons in the reactions $\gamma p\to p\eta'$ and $pp\to pp\eta'$ is described consistently within a relativistic meson exchange model of hadronic interactions. The...
Determination of the $\Theta^+$ parity from $\gamma n \to K^- K^+ n$ (2003)
It is demonstrated that measurements of photon asymmetry in the $\gamma n \to K^- K^+ n$ reaction, can most likely determine the parity of the newly discovered $\Theta^+$ pentaquark. We predict that...
The Semi-Regenerative Method Of (2003)
James M. Calvin, Peter W. Glynn, K. Nakayama
We develop a class of techniques for analyzing the output of simulations of a semi-regenerative process. Called the semi-regenerative method, the approach can be used in virtually all situations in...
Experimental study of pp eta dynamics in the pp --> ppeta reaction (2003)
Moskal, P., Budzanowski, A., Czyzykiewicz, R., Grzonka, D., Janusz, M., ...
A high statistics measurement of the pp --> ppeta reaction at an excess energy of Q = 15.5 MeV has been performed at the internal beam facility COSY-11. The stochastically cooled proton beam and the...
Near-threshold $\omega$ and $\phi$ meson productions in $pp$ collisions (2003)
Using a relativistic effective Lagrangian at the hadronic level, near-threshold $\omega$ and $\phi$ meson productions in proton proton ($pp$) collisions, $p p \to p p \omega/\phi$, are studied within...
An analysis of the reaction pp --> pp\eta near threshold (2003)
Nakayama, K., Haidenbauer, J., Hanhart, C., Speth, J.
It is shown that most of the available data on the $pp\to pp\eta$ reaction, including the invariant mass distributions in the $pp\to pp\eta$ reaction recently measured at COSY, can be understood in...
Analysis of the reaction pp to pp eta near threshold (2003)
Nakayama, K., Haidenbauer, J., Hanhart, C., Speth, J.
This version is available at the following Publisher URL: http://prc.aps.org
Normal recognition of emotion in a prosopagnosic (2003)
Duchaine, B.C., Parker, H., Nakayama, K.
In the leading model of face perception, facial identity and facial expressions of emotion are recognized by separate mechanisms. In this report, we provide evidence supporting the independence of...
We present results for the $p p \to p p \omega$ reaction studied by considering two different scenarios: with and without the inclusion of nucleon resonance excitations. The recently measured angular...
The attentional blink in space and time (2002)
We report the results of two experiments addressing spatiotemporal variations in the “attentional blink” (AB). In the first experiment, six streams of letters were presented simultaneously around...
The role of priming in conjunctive visual search (2002)
Kristjansson, A., Wang, D., Nakayama, K.
To assess the role of priming in conjunctive visual search tasks, we systematically varied the consistency of the target and distractor identity between different conditions. Search was fastest in...
Eta Meson Production in NN Collisions (2002)
Nakayama, K., Speth, J., Lee, T. -S. H.
Eta meson production in both proton-proton and proton-neutron collisions is investigated within a relativistic meson exchange model of hadronic interactions. It is found that the available cross...
The Origin of Brain Potentials Associated with Selective Visual Attention. (2002)
This study is designed to find the origins of electrical signals generated by the brain in association with selective visual attention. A series of behavioral and electro-physiological tests on...
The development of 4H-SiC {03(3)over-bar8) wafers (2002)
Nakayama, K, Miyanagi, Y, Shiomi, H, Nishino, S, Kimoto, T, Matsunami, H
Less attention is more in the preparation of antisaccades, but not prosaccades (2001)
Kristjansson, A., Chen, Y., Nakayama, K.
To make a saccadic eye movement to a target we must first attend to it. It is therefore not surprising that diverting attention increases saccade latency, but is latency increased in all cases? We...
Pseudoscalar and vector meson production in NN collisions (2001)
Heavy meson production in nucleon-nucleon collisions is discussed within a meson exchange model of hadronic interactions, paying special attention to the basic dynamics that determine the behavior of...
Ohira, S, Nakayama, K, Ise, T, Ishida, T, Nogami, T, Watanabe, I, ...
The reactions pn -> d omega and pn -> d phi near threshold (2001)
Nakayama, K., Haidenbauer, J., Speth, J.
This version is available at the following Publisher URL: http://prc.aps.org
Rapid, object based learning in the deployment of transient attention (2001)
Kristjansson, A., Mackeben, M., Nakayama, K.
We show that transient attention summoned by an exogenous cue shows rapid learning of the relationship between the cue and a subsequent target in a discrimination task. In experiment 1, performance...
The reactions p + n --> d + omega and p + n --> d + phi near threshold (2000)
Nakayama, K., Haidenbauer, J., Speth, J.
The reactions p+n-->d+omega and p+n-->d+phi are studied within a relativistic meson-exchange model of hadronic interactions. Predictions for the total cross sections and for the angular distributions...
eta' meson production in proton-proton collisions (1999)
Nakayama, K., Arellano, H. F., Durso, J. W., Speth, J.
The pp -> pp eta' reaction is investigated within a relativistic meson-exchange model of hadronic interactions. We explore the role of nucleonic and mesonic, as well as the N* resonance currents, in...
$\phi$-meson production in proton-proton collisions (1999)
Nakayama, K., Durso, J. W., Haidenbauer, J., Hanhart, C., Speth, J.
The production of $\phi$-mesons in proton-proton collisions is investigated within a relativistic meson-exchange model of hadronic interactions. The experimental prerequisites for extracting the...
The Reaction $pp \to pp\phi$ and the Validity of the OZI Rule (1998)
Haidenbauer, J., Nakayama, K., Durso, J. W., Hanhart, C., Speth, J.
The reaction $pp \to pp \phi$ is investigated within a relativistic meson-exchange model of hadronic interactions. The possibility of extracting the $NN\phi$ coupling constant from a study of this...
On the treatment of $NN$ interaction effects in meson production in $NN$ collisions (1998)
We clarify under what circumstances the nucleon--nucleon final state interaction fixes the energy dependence of the total cross--section for the reaction $NN \to NNx$ close to production threshold,...
Production of $\omega$-mesons in proton-proton collisions (1998)
Nakayama, K., Szczurek, A., Hanhart, C., Haidenbauer, J., Speth, J.
The production of $\omega$-mesons in proton-proton collisions for proton incident energies up to 2.2 GeV is investigated within a meson-exchange model of hadronic interactions. We find a large...
The influence of negative-energy states on proton-proton bremsstrahlung (1996)
We investigate the effect of negative-energy states on proton-proton bremsstrahlung using a manifestly covariant amplitude based on a T-matrix constructed in a spectator model. We show that there is...
De Jong, F., Nakayama, K., Lee, T. -S. H.
The proton-proton bremsstrahlung is investigated within a coupled-channel model with the $\Delta$ degree of freedom. The model is consistent with the $NN$ scattering up to 1 GeV and the $\gamma...
A 6.9-in. high resolution projection CRT for an HDTV display (1994)
Asano, T., Hirota, K., Oku, K., Tanaka, Y., Nakayama, K., Ohsawa, M.
Projected Linear Response Theory for Charge-Exchange Excitations and Double Beta Decay (1993)
Krmpotić, F., Mariano, A., Kuo, T. T. S., Nakayama, K.
The projected random phase approximation (PRPA) for charge-exchange excitations is derived from the time-dependent variational principle. Explicit results for the unperturbed energies (including the...
Spin decomposition of the response of $^{44}$Ca and $^{48}$Ca to 300 MeV proton (1991)
Baker, F.T, Bimbot, L., Fergerson, R.W., Glashausser, C., Green, A., Haeusser, O., ...