Publications by authors named "Kensuke Harada"

Fourier-transform microwave spectroscopy has been applied for the 13C/18O-substituted tropolone to observe tunneling-rotation transitions as well as pure rotational transitions. The tunneling-rotation transitions were observed between the 13C-4 and -6 forms as well as between 13C-3 and -7, between 13C-1 and -2, and between 18O-8 and -9 (we denote these tunneling pairs as 13C-46, etc., below) although they have an asymmetric tunneling potential due to the difference in the zero point energy (ZPE).

View Article and Find Full Text PDF

This study introduces a rapid motion-replanning technique driven by a semantic 3D voxel mapping system, essential for humanoid robots to autonomously navigate unknown territories through online environmental sensing. Addressing the challenges posed by the conventional approach based on polygon mesh or primitive extraction for mapping, we adopt semantic voxel mapping, utilizing our innovative Extended-Octomap (ExOctomap). This structure archives environmental normal vectors, outcomes of Euclidean Cluster Extraction, and principal component analysis within an Octree structure, facilitating an (log ) efficiency in semantic accessibility from a position query x∈R3.

View Article and Find Full Text PDF

This paper presents a remotely operated robotic system that includes two mobile manipulators to extend the functional capabilities of a human body. Compared with previous tele-operation or robotic body extension systems, using two mobile manipulators helps with enlarging the workspace and allowing manipulation of large or long objects. The system comprises a joystick for controlling the mobile base and robotic gripper, and a motion capture system for controlling the arm poses.

View Article and Find Full Text PDF

Complex contact-rich insertion is a ubiquitous robotic manipulation skill and usually involves nonlinear and low-clearance insertion trajectories as well as varying force requirements. A hybrid trajectory and force learning framework can be utilized to generate high-quality trajectories by imitation learning and find suitable force control policies efficiently by reinforcement learning. However, with the mentioned approach, many human demonstrations are necessary to learn several tasks even when those tasks require topologically similar trajectories.

View Article and Find Full Text PDF

The Hedgehog (HH)-GLI pathway plays an important role in cell dedifferentiation and is therefore pivotally involved in the malignant transformation of cancer cells. GANT61, a selective inhibitor of GLI1 and GLI2, was reported as a promising treatment for cancer in various tissues; however, the biological impact of GANT61 in hepatocellular carcinoma (HCC), especially in undifferentiated HCC cells, remains unclear. In this study, we investigated the antitumor effect of GANT61 using two undifferentiated hepatoma cell lines: HLE and HLF.

View Article and Find Full Text PDF

Rotational transitions of the mono(β)-deuterated vinyl radical, HDC=CH, produced in a supersonic jet expansion by the ArF excimer laser photolysis, were observed by millimeter-wave spectroscopy. The b-type rotational transitions together with the weak a-type transitions were observed only for the lower component of the tunneling doublet, and no tunneling-rotation transitions connecting the lower and upper components were observed, suggesting that state mixing between the two components is negligibly small. The derived molecular constants such as the A rotational constant, Fermi contact interaction constants, and magnetic dipolar interaction constants indicate that the carrier of the observed spectrum is the trans-form of HDC=CH isomers, where the α-proton is located on the opposite side of the β-deuteron.

View Article and Find Full Text PDF

High resolution Fourier transform emission spectroscopy of the A∼Π-X∼Π band of the OCS ion was performed in the UV region to observe the ν (CO stretch) progression bands (υ = 0 → 2-5) for both the Ω=3/2 and 1/2 spin components. Accurate molecular constants including the rotational constants, B = 0.194 765(13) and 0.

View Article and Find Full Text PDF

This paper presents an integrated assembly and motion planning system to recursively find the assembly sequence and motions to assemble two objects with the help of a horizontal surface as the supporting fixture. The system is implemented in both assembly level and motion level. In the assembly level, the system checks all combinations of the assembly sequences and gets a set of candidates.

View Article and Find Full Text PDF

The pure rotational spectra of the FeCO radical in the ν2 (bending) and ν3 (Fe-C stretching) vibrational states of the ground X̃(3)Σ(-) electronic state were observed in the millimeter-wave region. The equilibrium rotational and centrifugal distortion constants were determined to be Be = 4374.631 (58) MHz and De = 1.

View Article and Find Full Text PDF

The ortho to para conversion of water ion, H2O(+), due to the interaction between the magnetic moments of the unpaired electron and protons has been theoretically studied to calculate the spontaneous emission lifetime between the ortho- and para-levels. The electron spin-nuclear spin interaction term, Tab(SaΔIb + SbΔIa) mixes ortho (I = 1) and para (I = 0) levels to cause the "forbidden" ortho to para |ΔI| = 1 transition. The mixing term with Tab = 72.

View Article and Find Full Text PDF

The H(2)C=CD isotopic species of vinyl radical produced in a supersonic jet expansion by ultraviolet laser photolysis was studied by millimeter-wave spectroscopy. Due to the tunneling motion of the α deuteron, the ground state is split into two components, 0(+) and 0(-). Tunneling-rotation transitions connecting the lower (0(+)) and upper (0(-)) components of the tunneling doublet were observed in the frequency region of 184-334 GHz, including three R- and two Q-branch transitions.

View Article and Find Full Text PDF

Background: Coronary artery wall echogenicity increases on echocardiograms during the acute phase of Kawasaki disease (KD). According to this background, echogenicity of the coronary artery wall in patients with KD is quantified by using integrated backscatter (IB) analysis.

Methods: IB analysis is a quantitative method for evaluating echogenicity.

View Article and Find Full Text PDF

Ortho-para mixing interaction due to the coupling of nuclear and electron spins was detected for the first time by millimeter-wave spectroscopy of the deuterated vinyl radical H(2)CCD. The ground state of H(2)CCD is split by the deuteron tunneling into two components 0(+) and 0(-) separated by DeltaE(0)=1186.794(16) MHz.

View Article and Find Full Text PDF

Aim: Mice lacking apolipoprotein A-V (apoA-V) displayed an increase in serum triglyceride (TG) levels; however, the correlation of apoA-V levels with TG levels in humans is controversial, and the exact mechanism by which apoA-V affects TG levels is unclear. The aim of the present study was to clarify the impact of apoA-V on the lipoprotein subclass profile in preadolescent children, which has not been studied.

Method: The study subjects were 178 (89 male, 89 female) 4th grade elementary school children (mean+/-SD: 9.

View Article and Find Full Text PDF

Background: The aim of the present study was to assess 3 year auditory and neurodevelopmental outcomes of persistent pulmonary hypertension of the newborn (PPHN) before and after introducing inhaled nitric oxide (i-NO) therapy, and to detect the clinical factors affecting poor outcome.

Methods: A retrospective historical cohort study of 26 survivors with PPHN with oxygenation index (OI) >or=25 (13 infants without i-NO therapy, control group; 13 with i-NO therapy, i-NO group) was performed. Auditory brainstem response (ABR) at 6 and 12 months and neurodevelopmental outcomes at 3 years of age were evaluated.

View Article and Find Full Text PDF

Background: The purpose of the present paper was to identify the predictive factors for survival for out-born infants born between 23 and 24 weeks of gestation.

Methods: Ninety-two infants born between 23 and 24 weeks' gestation who were admitted to a level III neonatal intensive care unit from 1987 to 2000, were retrospectively studied. Survival was defined as discharge from the neonatal intensive care unit.

View Article and Find Full Text PDF

The rotational spectrum of cobalt mononitrosyl (CoNO) produced by ultraviolet photolysis of Co(CO)(3)NO was observed in the millimeter-wave region. Seven rotational transitions in the ground state ranging from J = 6-5 to 12-11, with hyperfine splittings due to the Co nucleus (I = 7/2), were detected in a supersonic jet environment, while higher-frequency transitions in the range from J = 29-28 to 35-34 were measured in the ground, nu(1), nu(2), nu(3), and 2nu(2) vibrational states using a free-space absorption cell. It was confirmed from the observed spectral pattern that the CoNO molecule has a linear structure with the electronic ground state of (1)Sigma(+) symmetry.

View Article and Find Full Text PDF

The objective of this study was to test the hypothesis that accelerated endothelial dysfunction and the development of premature atherosclerosis are associated with age in subjects with coronary artery lesions after Kawasaki disease (KD). A case-control study was performed at a university hospital that included 35 post-KD subjects across a wide age range (range, 8-42 years) without traditional cardiovascular risk factors and 35 age- and sex-matched healthy control subjects (Cont). Flow-mediated dilatation (FMD) of the brachial artery-induced by reactive hyperemia, intima media thickness (IMT), and elastic modulus (Ep) of the common carotid artery were compared between KD and Cont subjects assessed against age.

View Article and Find Full Text PDF

A questionnaire study was performed to determine the current status of palivizumab prophylaxis against respiratory syncytial virus infection in Japanese children with congenital heart disease <2 years of age. Palivizumab prophylaxis decreased the respiratory syncytial virus hospitalization rate by 42.8%.

View Article and Find Full Text PDF

Background: The aim of the present paper was to investigate the effect of initial hemoglobin level on red blood cell transfusion and neonatal adaptation in extremely low-birthweight (ELBW) infants.

Methods: Subjects consisted of 54 ELBW infants admitted to level III neonatal intensive care unit between 1995 and 2000, and divided into two groups based on hemoglobin level at birth. High hemoglobin was defined as hemoglobin > or =15.

View Article and Find Full Text PDF

Background: A full dose of corticosteroid is required to induce complete remission (CR) in steroid-sensitive nephrotic syndrome (SSNS), unless it is possible to taper and discontinue along with the course after CR. But the mechanism of this change in steroid sensitivity remains unknown. P-glycoprotein (PGP) can eliminate given corticosteroids from cytoplasm, which results in corticosteroid resistance.

View Article and Find Full Text PDF

Background: The purpose of the present study was to evaluate the usefulness of serum S100B as a clinical marker of intracranial lesions in newborns.

Methods: The study involved 22 normal and 40 diseased newborns. Serum S100B level was measured on days 1 and 6 in normal newborns.

View Article and Find Full Text PDF

Background: This study was performed to investigate the incidence of arrhythmias in patients with Kawasaki disease (KD).

Methods And Results: Electrophysiologic studies (EPS) were performed in 40 patients (mean age: 10.3+/-5.

View Article and Find Full Text PDF