犯罪報道からみる南米出身者のコミュニティ

Alberto ? Kiyoshi,FONSECA SAKAI 전남대학교 글로벌디아스포라연구소 2007 전남대학교 세계한상문화연구단 국제학술회의 Vol.2007 No.8

Twenty Years of Clinical Experience with Cardiac Myxomas: Diagnosis, Treatment, and Follow Up

Tomás Francisco Cianciulli,Alberto Cozzarin,Juan Bautista Soumoulou,María Cristina Saccheri,Ricardo José Méndez,Martín Alberto Beck,Juan Alberto Gagliardi,Jorge Alberto Lax 한국심초음파학회 2019 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.27 No.1

BACKGROUND Cardiac myxomas are the most frequent cardiac tumors. Although histologically benign, in some cases myxomas may be lethal, due to impairment of cardiac dynamics and their thromboembolic potential. The study aimed to assess the clinical presentation of cardiac myxomas and their correlation with echocardiographic features and to describe the perioperative results and long-term outcome of surgically treated patients. METHODS A prospective study of 53 patients with cardiac myxomas who were operated the Hospital Argerich, followed clinically and with echocardiography from 1993 until 2013. All patients underwent echocardiographic studies. RESULTS The patient's mean age was 53 ± 16 years (62.3% were women). The most common findings were dyspnea followed by embolic events. Most tumors were localized in the left atrium (77.4%), mainly in the fossa ovalis (63%). Mean size of the tumors was 4.76 x 3.50 cm. Tumors were generally mobile (88%) and went beyond the valve plane, causing mild mitral or tricuspid valve obstruction (58%) and dilation of the respective atrial chamber. Patients whose tumors were obstructive had higher pulmonary artery systolic pressures (50 vs 33 mmHg p < 0.01). According to the echocardiographic appearance 67% of tumors had a smooth surface and the remaining 32% had a villous surface. All patients with embolic manifestations had tumors with a villous surface. CONCLUSIONS Clinical presentation relates to the ultrasound characteristics of myxomas. Smooth tumors are larger, occur with obstructive symptoms, and benefit from an elective surgery, whereas villous myxomas entailed a high embolic risk and require prompt surgical treatment.

V-notched elements under mode II loading conditions

Alberto Sapora,Pietro Cornetti,Alberto Carpinteri 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.49 No.4

We apply the Finite Fracture Mechanics criterion to address the problem of a V-notched structure subjected to mode II loading, i.e., we provide a way to determine the direction and the load at which a crack propagates from the notch tip and express the critical conditions in terms of the generalized stress intensity factor. Weight functions for V-notch emanated cracks available in the literature allow us to implement the fracture criterion proposed in an almost completely analytical manner: the determination of the critical load and the direction of crack growth is reduced to a stationary point problem. A comparison with experimental data presented in the Literature concludes the paper.

Generalized fracture toughness for specimens with re-entrant corners: Experiments vs. theoretical predictions

Alberto Carpinteri,Pietro Cornetti,Nicola Pugno,David Taylor,Alberto Sapora 국제구조공학회 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.32 No.5

In this paper the results of a series of experimental tests upon three-point bending specimens made of polystyrene and containing re-entrant corners are firstly described. Tests involved different notch angles, different notch depths and finally different sizes of the samples. All the specimens broke at the defect, as expected because of the material brittleness and, hence, the generalized stress intensity factor was expected to be the governing failure parameter. Recorded failure loads are then compared with the predictions provided by a fracture criterion recently introduced in the framework of Finite Fracture Mechanics: fracture is assumed to propagate by finite steps, whose length is determined by the contemporaneous fulfilment of energy balance and stress requirements. This fracture criterion allows us to achieve the expression of the generalized fracture toughness as a function of the tensile strength, the fracture toughness and the notch opening angle. Comparison between theoretical predictions and experimental data turns out to be more than satisfactory.

Generalized fracture toughness for specimens with re-entrant corners: Experiments vs. theoretical predictions

Carpinteri, Alberto,Cornetti, Pietro,Pugno, Nicola,Sapora, Alberto,Taylor, David Techno-Press 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.32 No.5

In this paper the results of a series of experimental tests upon three-point bending specimens made of polystyrene and containing re-entrant corners are firstly described. Tests involved different notch angles, different notch depths and finally different sizes of the samples. All the specimens broke at the defect, as expected because of the material brittleness and, hence, the generalized stress intensity factor was expected to be the governing failure parameter. Recorded failure loads are then compared with the predictions provided by a fracture criterion recently introduced in the framework of Finite Fracture Mechanics: fracture is assumed to propagate by finite steps, whose length is determined by the contemporaneous fulfilment of energy balance and stress requirements. This fracture criterion allows us to achieve the expression of the generalized fracture toughness as a function of the tensile strength, the fracture toughness and the notch opening angle. Comparison between theoretical predictions and experimental data turns out to be more than satisfactory.

V-notched elements under mode II loading conditions

Sapora, Alberto,Cornetti, Pietro,Carpinteri, Alberto Techno-Press 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.49 No.4

We apply the Finite Fracture Mechanics criterion to address the problem of a V-notched structure subjected to mode II loading, i.e., we provide a way to determine the direction and the load at which a crack propagates from the notch tip and express the critical conditions in terms of the generalized stress intensity factor. Weight functions for V-notch emanated cracks available in the literature allow us to implement the fracture criterion proposed in an almost completely analytical manner: the determination of the critical load and the direction of crack growth is reduced to a stationary point problem. A comparison with experimental data presented in the Literature concludes the paper.

Usefulness of Pep-Test for Laryngo-Pharyngeal Reflux: A Pilot Study in Primary Care

Alberto Bozzani,Ignazio Grattagliano,Gaia Pellegatta,Manuele Furnari,Carlotta Galeone,Vincenzo Savarino,Edoardo Savarino,Rudi De Bastiani 대한가정의학회 2020 Korean Journal of Family Medicine Vol.41 No.4

Background: Gastroesophageal reflux disease is a digestive disorder characterized by nausea, regurgitation, and heartburn. Gastroesophageal reflux is the primary cause of laryngeal symptoms, especially chronic posterior laryngitis. The best diagnostic test for this disease is esophageal impedance-pH monitoring; however, it is poorly employed owing to its high cost and invasiveness. Salivary pepsin measured using a lateral flow device (Pep-test) has been suggested as an indirect marker of laryngopharyngeal reflux (LPR). The present study tested the reliability of Pep-test in diagnosing LPR in uninvestigated primary care attenders presenting with chronic laryngeal symptoms, and evaluated the raw pepsin concentration in patients with LPR. Methods: A multicenter, non-interventional pilot study was conducted on 86 suspected patients with LPR and 59 asymptomatic subjects as controls in three Italian primary care settings. A reflux symptom index questionnaire was used to differentiate patients with LPR (score >13) from controls (score <5). Two saliva samples were collected, and comparisons between the groups were performed using two-sided statistical tests, according to variable distributions. Results: There was no statistical difference in the salivary pepsin positivity between LPR patients and controls, whereas the pepsin intensity value was higher in controls than in LPR patients. Conclusion: A high prevalence of pepsin positivity was observed in asymptomatic controls. Pepsin measurement should not be considered as a diagnostic test for LPR in primary care patients.

Creativity in Surgery

Alberto PENA 대한외과학회 2019 대한외과학회 학술대회 초록집 Vol.2019 No.10

Development and Implementation of an Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) Decoder using GNU Radio and USRP1

Alberto S. Banacia,Joseph C. Acebedo,Johari C. Villegas,Arvin Tate N. Yu 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.1

The recent adoption by the Philippine government of Japan’s Integrated Services Digital Broadcasting- Terrestrial (ISDB-T) standard as the digital TV standard to be used in the country prompts the need for a platform that will facilitate understanding of its concept and provide a framework for evaluating algorithms that will improve ISDB-T receiver’s performance. This research work develops and implements an ISDB-T decoder in a Software-Defined Radio (SDR) platform. The study covers two parts. First, a recorded raw baseband ISDB-T signal in .dat file format was simulated through the configuration of signal processing blocks in GNU Radio Companion (GRC). The successful simulation produced a transport stream .ts H264- MPEG-4 AVC file and resulted to the display of the signal in a 6MHz bandwidth with a 64QAM constellation plot, a 34.22 dB Modulation Error Rate (MER), 8.95 dB and 18.00 dB Bit Error Rate (BER) for the Viterbi and Reed Solomon decoders, respectively. The simulation measurements served as indicators for the quality of the decoded signal as the output transport stream file was played simultaneously in VLC media player. Second, an actual reception of a private Philippine ABS-CBN Digital Television Terrestrial (DTT) signal located in UHF Channel 43 was performed in real-time through the system integration of the USRP1 with the GRC Signal flow graph. A Log Periodic LP0410 PCB antenna that can operate within 400MHz to 1GHz is also integrated to the SDR platform to receive the digital broadcast. Due to proprietary DTV issues, the system was only able to display ABS-CBN’s frequency spectrum centered at its assigned frequency of 611.143MHz at a 6MHz bandwidth.

Comparison of apical extrusion of intracanal bacteria by various glide-path establishing systems: an in vitro study

Alberto Dagna,Rashid El Abed,Sameeha Hussain,Ibrahim H Abu-Tahun,Livia Visai,Federico Bertoglio,Floriana Bosco,Riccardo Beltrami,Claudio Poggio,김현철 대한치과보존학회 2017 Restorative Dentistry & Endodontics Vol.42 No.4

Objectives: This study compared the amount of apically extruded bacteria during the glide-path preparation by using multi-file and single-file glide-path establishing nickel-titanium (NiTi) rotary systems. Materials and Methods: Sixty mandibular first molar teeth were used to prepare the test apparatus. They were decoronated, blocked into glass vials, sterilized in ethylene oxide gas, infected with a pure culture of Enterococcus faecalis, randomly assigned to 5 experimental groups, and then prepared using manual stainless-steel files (group KF) and glide-path establishing NiTi rotary files (group PF with PathFiles, group GF with G-Files, group PG with ProGlider, and group OG with One G). At the end of canal preparation, 0.01 mL NaCl solution was taken from the experimental vials. The suspension was plated on brain heart infusion agar and colonies of bacteria were counted, and the results were given as number of colony-forming units (CFU). Results: The manual instrumentation technique tested in group KF extruded the highest number of bacteria compared to the other 4 groups (p < 0.05). The 4 groups using rotary glide-path establishing instruments extruded similar amounts of bacteria. Conclusions: All glide-path establishment instrument systems tested caused a measurable apical extrusion of bacteria. The manual glide-path preparation showed the highest number of bacteria extruded compared to the other NiTi glide-path establishing instruments.