Dynamic motion of two-link arms with different link lengths using singularities

The 11th International Symposium on Adaptive Motion of Animals and Machines. Kobe University, Japan. 2023-06-06/09. Adaptive Motion of Animals and Machines Organizing Committee.Poster Session P3

Outcomes of solitary postoperative recurrence of esophageal squamous cell carcinoma diagnosed with FDG-PET/CT and treated with definitive radiation therapy

Background Surgical resection of esophageal cancer is frequently performed to achieve a complete cure. However, the postoperative recurrence rate is 36.8–42.5%, leading to poor prognosis. Radiation therapy has been used to treat recurrences; solitary recurrence has been proposed as a prognostic factor for radiation therapy, though its significance is unclear. 18F-fluorodeoxyglucose positron emission tomography is a highly accurate diagnostic modality for esophageal cancer. This retrospective study aimed to analyze the outcomes of solitary postoperative recurrences of esophageal squamous cell carcinoma diagnosed with 18F-fluorodeoxyglucose positron emission tomography and treated with definitive radiation therapy. Methods We examined 27 patients who underwent definitive radiation therapy for single or multiple postoperative recurrences of esophageal squamous cell carcinoma between May 2015 and April 2021. 18F-fluorodeoxyglucose positron emission tomography/computed tomography was performed within 3 months before the commencement of radiation therapy. Kaplan–Meier, univariate, and multivariate analyses were performed to examine the overall survival and identify potential prognostic factors. Results The 1-, 2-, and 3-year overall survival rates were 85.2%, 62.6%, and 47.3%, respectively, and solitary recurrence was the only significant factor associated with overall survival (P = 0.003). The 1-, 2-, and 3-year overall survival rates in patients with solitary recurrence were 91.7%, 80.2%, and 80.2%, respectively, and in patients with multiple recurrences they were 80.0%, 50.3%, and 25.1%, respectively. Multivariate analysis also showed solitary recurrence as a significant factor for overall survival. Conclusions When diagnosed with 18F-fluorodeoxyglucose positron emission tomography/computed tomography, solitary recurrence appears to have a more favorable prognosis than multiple recurrences

The Fine Structure of the Pancreatic Endocrine Cells of Salamander, Hinobius nebulosus

The pancreatic endocrine cell of adult salamanders, Hynobius nebulosus, was studied with light and electron microscopy. The following results were obtained. 1. The endocrine cells were distributed individually or in small groups, islets, and were located either in the acinus or in the duct epithelium. 2. Two types of endocrine cell group, the A cell islet and B cell islet, were observed. Each islet was light-microscopically composed of two to five cells, but electron-microscopically, only two or three cells were in direct contact with each other. 3. These islets were not always composed of the same cell type, but frequently were mingled with other cell types. 4. A and B cells were easily distinguished on the basis of the morphology of secretory granules. 5. In the B cells, the secretory granule core did not show a typical crystalline pattern. Crystalloid structures originated from mitochondria were occasionally encountered and intracytoplasmic filaments were most prominent. 6. D cells were identified by the correlative observation of thin sections with an adjacent semithin section stained with silver impregnation by HELLMAN and HELLERSTROM. The D cell secretory granules were electron low dense to moderately dense and showed varying numbers of elongate profiles besides round ones. 7. F-like cells contain electron dense, elliptic secretory granules except for spherical ones. 8. Another type of cells was distinguished. They had a scanty cytoplasm which contained extremely dense, secretory granules with different shapes. 9. The average long and short diameters of secretory granules of each cell type were measured using Reiz-ASM image analyzers

LIGHT-DEPENDENT PROTON MOVEMENT AND PHOTOINTERMEDIATES ON BACTERIORHODOPSIN PHOTOCYCLE

The relationship between photointermeidates of bacteriorhbdopsin (bR) and proton uptake was investigated by a flash photolysis technique. Attention was paid to keep the sample in a light-adapted state and under the same conditions during measurements. The decay of M-intermediate (M), the formation and decay of O-intermediates (O), the recovery of bR and release and the uptake of protons were measured with a purple membrane suspension (pH 7.0, 0.5 M NaCl) at various temperatures. The following reaction scheme for the bR photocycle was deduced from the results. 1) The decay process of M consists of three components (M_, M_ and M_s). 2) O is formed from the faster component of M (M_). 3) A part of M (M_ and M_s) decays directly to bR without passing through O. 4) The uptake of protons is coupled with the decay of the slowest M (M_s). The above reaction scheme was confirmed by the results obtained from similar experiments using an analog pigment of bR, Np-bR, M of which decays much more slowly than that in native bR system

Experimental demonstration of quantum teleportation of a squeezed state

Quantum teleportation of a squeezed state is demonstrated experimentally. Due to some inevitable losses in experiments, a squeezed vacuum necessarily becomes a mixed state which is no longer a minimum uncertainty state. We establish an operational method of evaluation for quantum teleportation of such a state using fidelity, and discuss the classical limit for the state. The measured fidelity for the input state is 0.85$\pm$ 0.05 which is higher than the classical case of 0.73$\pm$0.04. We also verify that the teleportation process operates properly for the nonclassical state input and its squeezed variance is certainly transferred through the process. We observe the smaller variance of the teleported squeezed state than that for the vacuum state input.Comment: 7 pages, 1 new figure, comments adde

Helicity Selection of the Cycloidal Order in Noncentrosymmetric EuIrGe3_3

The magnetic helicities of the cycloidal ordering in EuIrGe$_3$, with a noncentrosymmetric tetragonal structure, have been studied by circularly polarized resonant X-ray diffraction. It is shown that the helicity of each cycloidal domain is uniquely determined and satisfies the symmetry relations of the $C_{4v}$ point group of the crystal structure. The result shows that the cycloidal helicity is determined by the Dzyaloshinskii-Moriya type antisymmetric exchange interaction. The domain selection and the phase transition by the external magnetic field along [100] and [110] have also been studied. It is shown that the cycloidal plane prefers to be perpendicular to the field and the transverse conical state is realized.Comment: 6 pages, 4 figures, 5 figures in the supplemental material, accepted for publication in J. Phys. Soc. Jp

Intimal sarcoma from the iliac artery

We present a rare case of intimal sarcoma arising from the common iliac artery in an 82-year-old man who presented with intermittent claudication. He had undergone endovascular therapy with self-expanding stents to both iliac arteries that had occluded soon after placement. After salvage bypass grafting, a diagnosis of intimal sarcoma with angiosarcoma phenotype from the iliac artery was made. Further bypass graft surgery relieved symptoms temporarily. However, the tumor progressed and the left limb became ischemic. The chemotherapy of eribulin did not prevent tumor progression. The patient died of the disease 20 months after the first surgery