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1.
Artigo em Inglês | MEDLINE | ID: mdl-29534021

RESUMO

The 2013 Partial Amendment of the Disaster Countermeasures Basic Law mandated that a roster of vulnerable persons during disasters be created, and further development of evacuation support is expected. In this study, the number of vulnerable people living in target analytical areas are identified in terms of neighborhood units by using the National Health Insurance Database to create a realistic and efficient evacuation support plan. Later, after considering the "vulnerability" of an area to earthquake disaster damage, a quantitative evaluation of the state of the disaster is performed using a principle component analysis that further divided the analytical target areas into neighborhood units to make a detailed determination of the number of disaster-vulnerable persons, the severity of the disaster, etc. The results of the disaster evaluation performed after considering the vulnerability of an area are that 628 disaster-vulnerable persons live in areas with a relatively higher disaster evaluation value.


Assuntos
Desastres , Características de Residência/estatística & dados numéricos , Populações Vulneráveis/estatística & dados numéricos , Cidades/estatística & dados numéricos , Estudos Transversais , Planejamento em Desastres/métodos , Terremotos , Humanos , Japão , Programas Nacionais de Saúde
2.
Nanotechnology ; 27(42): 425401, 2016 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-27632684

RESUMO

In this work, we demonstrate homogeneously distributed In0.3Ga0.7N/GaN quantum disks (QDs), with an average diameter below 10 nm and a high density of 2.1 × 10(11) cm(-2), embedded in 20 nm tall nanopillars. The scalable top-down fabrication process involves the use of self-assembled ferritin bio-templates as the etch mask, spin coated on top of a strained In0.3Ga0.7N/GaN single quantum well (SQW) structure, followed by a neutral beam etch (NBE) method. The small dimensions of the iron cores inside ferritin and nearly damage-free process enabled by the NBE jointly contribute to the observation of photoluminescence (PL) from strain-relaxed In0.3Ga0.7N/GaN QDs at 6 K. The large blueshift of the peak wavelength by over 70 nm manifests a strong reduction of the quantum-confined Stark effect (QCSE) within the QD structure, which also agrees well with the theoretical prediction using a 3D Schrödinger equation solver. The current results hence pave the way towards the realization of large-scale III-N quantum structures using the combination of bio-templates and NBE, which is vital for the development of next-generation lighting and communication devices.

3.
Sci Rep ; 5: 9371, 2015 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-25792119

RESUMO

Quantum dots photonic devices based on the III-V compound semiconductor technology offer low power consumption, temperature stability, and high-speed modulation. We fabricated GaAs nanodisks (NDs) of sub-20-nm diameters by a top-down process using a biotemplate and neutral beam etching (NBE). The GaAs NDs were embedded in an AlGaAs barrier regrown by metalorganic vapor phase epitaxy (MOVPE). The temperature dependence of photoluminescence emission energies and the transient behavior were strongly affected by the quantum confinement effects of the embedded NDs. Therefore, the quantum levels of the NDs may be tuned by controlling their dimensions. We combined NBE and MOVPE in a high-throughput process compatible with industrial production systems to produce GaAs NDs with tunable optical characteristics. ND light emitting diode exhibited a narrow spectral width of 38 nm of high-intensity emission as a result of small deviation of ND sizes and superior crystallographic quality of the etched GaAs/AlGaAs layer.

4.
Ann Nucl Med ; 24(4): 233-40, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-20333484

RESUMO

Clinical or subclinical hyperparathyroidism (HPT) is one of the most common endocrine disorders. In patients with HPT who meet the indications for parathyroidectomy, complete surgical resection of all hyperfunctioning parathyroid tissue is essential for the curative treatment. The conventional surgical approach is bilateral neck exploration, whereas minimally invasive parathyroidectomy has been made possible by the introduction of (99m)Tc-sestamibi scintigraphy for preoperative localization of parathyroid adenomas. In minimally invasive surgery, the surgeon expects some modalities that predict complete resection of all hyperfunctioning parathyroid glands. The prevalence rate of (99m)Tc-sestamibi scanning for single parathyroid adenoma was widely accepted as 85-95%. Moreover, the recent developing technology of semiconductor electronics has produced useful portable gamma-probes. Intraoperative navigation using these devices provides the possibility of easy and definitive identification of parathyroid nodules during the operation. In minimally invasive radioguided parathyroidectomy using gamma-probe, different protocols are based on different timing and doses of tracer injected. Each procedure is technically easy, safe, with a low morbidity rate, and has better cosmetic results and lower overall cost than conventional bilateral neck exploration. We have applied this technique in selected patients and achieved success comparable to that achieved with contemporaneously performed standard neck exploration. In the hands of a competent surgeon, the use of sestamibi scanning and radioguided parathyroidectomy in appropriately selected patients is a useful technique.


Assuntos
Hiperparatireoidismo/cirurgia , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Paratireoidectomia/métodos , Cirurgia Assistida por Computador/métodos , Humanos , Hiperparatireoidismo/metabolismo , Período Intraoperatório , Hormônio Paratireóideo/metabolismo
5.
J Nanosci Nanotechnol ; 9(3): 1897-903, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19435056

RESUMO

Based on recent theoretical photoluminescence intensity calculations, the population densities of sixteen semiconducting single-walled carbon nanotubes grown by alcohol catalytic chemical vapor deposition were estimated for two different temperatures. The profiles of population density merely as functions of tube-diameter or chiral angle are found to be widely scattered. However, systematic profiles are detectable when separately split into (2n + m), (n + 2m) and (n - m) family arrays. Apart from these well-knit family behaviors, the population densities of the group of nanotubes forming another three possible series [viz. constant-n, constant-m and constant-(n + m)] also show evidence of good correlations. Hence, a two-dimensional chiral-zone selective growth principle is hypothesized.

6.
Nihon Hotetsu Shika Gakkai Zasshi ; 49(1): 84-92, 2005 Feb.
Artigo em Japonês | MEDLINE | ID: mdl-15838155

RESUMO

PURPOSE: Intraoral views of teeth with dowel and post hole taken by small three-dimensional X-ray CT (3DX) were compared with three-dimensional images from specimen sections of the same extracted teeth. This comparison shows the usefulness of 3DX for examination of cracked teeth in the oral cavity. MATERIALS AND METHODS: After taking dental tomographic images using 3DX for fractured teeth in the oral cavity, the fractured teeth were extracted and three-dimensional images for them and their cracks were obtained from a set of photographed sections. Then both sets of three-dimensional images for the fractured teeth were compared in terms of the form and region of the cracks. DISCUSSION: The tooth cracks were observed at the root face region in the intraoral view. Also, in the extracted teeth, fracture lines were recognized from the three-dimensional images. Moreover, a discontinuous image was obtained in teeth from the dental tomographic image using 3DX. This discontinuous image in teeth was observed in the same region and direction as the cracks of the three dimensional image from specimen sections of the extracted teeth. CONCLUSIONS: The discontinuous images of teeth in the dental tomographic images from 3DX were observed in the same region and direction as the cracks of teeth in the three-dimensional images from specimen sections of the extracted teeth. It was confirmed that dental tomographic images from 3DX are useful for finding cracks in living teeth. However, dental tomographic images from small three-dimensional X-ray CT are not perfectly reliable because the discontinuous image is not found in some teeth where the cracks are recognized by images from specimen sections after extraction.


Assuntos
Imageamento Tridimensional , Técnica para Retentor Intrarradicular , Radiografia Dentária/métodos , Tomografia Computadorizada por Raios X/métodos , Fraturas dos Dentes/diagnóstico por imagem , Dente/diagnóstico por imagem , Humanos , Dente/patologia , Extração Dentária , Fraturas dos Dentes/patologia
8.
World J Surg ; 28(11): 1075-8, 2004 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-15490052

RESUMO

Minimally invasive surgery using endoscopic vision is widely employed for the treatment of thyroid diseases. We have performed endoscopic thyroidectomy by the axillary approach (axillary approach) and video-assisted thyroidectomy via a 3 cm cervical incision (video-assisted approach). In this study, we evaluated the efficacy of these two procedures. Each procedure was performed in 20 consecutive consenting patients. The degree of invasiveness after surgery was compared using postoperative results. The amount of pain and satisfaction with surgery was evaluated by grade (1-5) using a patient questionnaire. All thyroidectomies were completed successfully. No recurrent laryngeal nerve palsies occurred. Operating time for the video-assisted approach was significantly shorter than that for the axillary approach (p < 0.01). The amount of pain for the axillary approach on 1, 3, and 5 days after operation, respectively, was graded 3.2+/-0.7, 2.1+/-0.6, and 1.6+/-0.7 compared to 2.7+/-1.1, 1.7+/-0.7, and 1.1+/-0.2 for the video-assisted approach. The postoperative course was significantly less painful in patients undergoing the video-assisted approach on postoperative days 3 and 5 (p < 0.01). The degrees of satisfaction for the axillary approach and the video-assisted procedure were 1.2+/-0.4 and 2.4+/-1.0, respectively (p < 0.01). The video-assisted approach is less "invasive" than the axillary approach, but the axillary approach may be indicated for patients who are anxious about the visible cosmetic results.


Assuntos
Tireoidectomia/métodos , Cirurgia Vídeoassistida , Adulto , Axila , Cosméticos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Dor Pós-Operatória/epidemiologia , Satisfação do Paciente
9.
J Am Coll Surg ; 196(2): 189-95, 2003 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-12595044

RESUMO

BACKGROUND: Surgical treatments for thyroid diseases require skin incisions that can result in prominent scars, complaints resulting from adhesions, hypesthesia, and paresthesia in the neck. We have developed an endoscopic thyroidectomy using an axillary approach. In this article, we compare our original technique with conventional open surgery from the aspects of surgical invasiveness and patients' complaints after surgery. STUDY DESIGN: Each procedure was performed in 20 patients with follicular tumors. The two groups were similar for age, gender, and the mean diameter of the thyroid tumor. No statistically significant difference in the final pathological diagnosis was found between the two groups. Surgical invasiveness and patients' complaints after surgery were compared using results of the operation and a questionnaire. RESULTS: The operating time for open surgery was significantly shorter than that for endoscopic surgery (p < 0.01). In the endoscopic surgery group, the patient questionnaires revealed that 4 patients had severe anterior chest pain on the first postoperative day. The postoperative pain decreased after, and we could not find any difference between the two groups with regard to postoperative pain. Three months after surgery, one patient who had received an endoscopic procedure complained of slight hypesthesia, and none of the patients complained of discomfort while swallowing. Among the patients who underwent open surgery, 13 patients (65%; p < 0.01) complained of hypesthesia or paresthesia and 6 patients (30%; p < 0.05) complained of discomfort while swallowing. All of the patients treated using the endoscopic procedure were satisfied with the cosmetic results, but 15 patients who underwent open surgery complained of unsatisfactory cosmetic results (p < 0.01). CONCLUSIONS: The incidence of postoperative complaints after endoscopic surgery is considerably lower than that after open surgery.


Assuntos
Endoscopia/métodos , Tireoidectomia/métodos , Adulto , Axila , Cicatriz/etiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Satisfação do Paciente , Doenças da Glândula Tireoide/cirurgia , Tireoidectomia/efeitos adversos , Resultado do Tratamento
10.
Biomed Pharmacother ; 56 Suppl 1: 14s-17s, 2002.
Artigo em Inglês | MEDLINE | ID: mdl-12487243

RESUMO

We describe our technique for performing a mini-incision parathyroidectomy in patients with hyperparathyroidism. Since our procedure differs from conventional parathyroidectomy in requiring a 2- or 3-cm skin incision and no raising of skin flap, this technique resulted in a good cosmetic status and less invasiveness. Hypesthesia or paresthesia in the neck and discomfort while swallowing related to a large skin incision and raising of skin flap are minimized. Although the cosmetic results of endoscopic techniques are better than those of our procedures, endoscopic instruments remain traumatic, can easily inflict iatrogenic lesions to parathyroid adenomas and enhance the risk of tumor cell exfoliation, especially if the parathyroid adenoma is manipulated by the instruments. Our surgical procedure can be less technically demanding and time-consuming. Although the number of patients whom we have treated in this manner is still small, we believe that our new procedure constitutes a useful surgical treatment for hyperparathyroidism.


Assuntos
Paratireoidectomia/métodos , Humanos , Procedimentos Cirúrgicos Minimamente Invasivos/instrumentação , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Paratireoidectomia/instrumentação
11.
Biomed Pharmacother ; 56 Suppl 1: 60s-63s, 2002.
Artigo em Inglês | MEDLINE | ID: mdl-12487254

RESUMO

We recently developed a new surgical technique for carrying out thyroidectomy, to minimize surgical invasiveness and improve the cosmetic result. Our procedure differs from conventional thyroidectomy in requiring a 3-cm skin incision and no raising of the skin flap. Since this technique decreased tissue trauma by obviating unnecessary neck exploration, hypesthesia or paresthesia in the neck and discomfort while swallowing, related to a large skin incision and raising of the skin flap, are minimized. Since thyroidectomy is performed after delivering the thyroid gland through the small skin incision, sufficient exposure for dissection of the pretracheal and paratracheal space can be obtained. Therefore, injuring the recurrent laryngeal nerve and the parathyroid gland can be avoided. Although the number of patients that we have treated in this manner is still small, we believe that our new procedure constitutes a useful surgical treatment for patients with thyroid disease.


Assuntos
Tireoidectomia/métodos , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Procedimentos Cirúrgicos Minimamente Invasivos/estatística & dados numéricos , Doenças da Glândula Tireoide/cirurgia , Tireoidectomia/estatística & dados numéricos
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