Đặt vấn đề: Áp xe trung thất (AXTT) do thủng thực quản (TQ) đã được biết đến từ lâu là nhiễm khuẩ... more Đặt vấn đề: Áp xe trung thất (AXTT) do thủng thực quản (TQ) đã được biết đến từ lâu là nhiễm khuẩn nặng, nguy cơ tử vong cao. Mục đích nghiên cứu đánh giá kết quả điều trị phẫu thuật AXTT tại bệnh viện Việt Đức. Đối tượng và phương pháp nghiên cứu: Nghiên cứu tiến cứu kết hợp hồi cứu các trường hợp chẩn đoán AXTT do thủng TQ được điều trị tại bệnh viện Việt Đức từ 1/2016 đến 3/2019, bao gồm các trường hợp tử vong. Chẩn đoán AXTT theo tiêu chuẩn của Estrera (1983), Số liệu được xử lý bằng phần mềm SPSS 20.0. Nghiên cứu được thông qua hội đồng khoa học của bệnh viện. Kêt quả: Tổng số 40 ca, tỷ lệ nam: nữ 4,7: 1; Tuổi từ 36 đến 60 tuổi chiếm 60%. Chấn thương 70%, bệnh lý 30%. Do hóc xương chiếm 88,5%. Thủng ở 1/3 trên TQ 57,5%, 1/3 giữa TQ 22,5 %, và 1/3 dưới TQ 20%. Type I chiếm 55%, type IIb chiếm 45%, không có type IIa. Phương pháp điều trị phẫu thuật: Dẫn lưu đơn thuần 82,1%, mở ngực 17,9%. Trong dẫn lưu có dẫn lưu cổ 40,6%; Dẫn lưu ngực 31,2%, Dẫn lưu cổ + Ngực 28,1%. Trong m...
Tạp chí Phẫu thuật Tim mạch và Lồng ngực Việt Nam, 2021
Objectives: Use of the HAS-BLED score in risk stratifying patients on dual antiplatelet therapy a... more Objectives: Use of the HAS-BLED score in risk stratifying patients on dual antiplatelet therapy after stent placement. Methods & Results: 304 patients who underwent stent placement from June, 2018 to December 2018. There is 6,57% patients with medium & severe bleeding. Area under the curve of HAS-BLED score (AUC); PRECISE-DAPT score and CRUSADE were sequential 0.59; 0,79 and 0,84 (p=0,0001) at post-PCI procedures; were sequential 0,72; 0,94 và 0,88 (p=0,00001) at less than 6 months after PCI procedures, and were sequential 0,87; 0,73 và 0,70 (p=0,0068) at more than 6 months after PCI procedures. Conclusion: the HAS-BLED score was most useful for predicting bleeding in patients on on dual antiplatelet therapy after stent placement at more than 6 months after PCI procedures. PRECISE-DAPT score was most useful for predicting bleeding at less than 6 months after PCI procedures and CRUSADE score was most useful for predicting bleeding at post procedure.
Tạp chí Phẫu thuật Tim mạch và Lồng ngực Việt Nam, 2021
Objectives: NT-ProBNP could influence the pacemaker parameters in patients with sick sisnus syndr... more Objectives: NT-ProBNP could influence the pacemaker parameters in patients with sick sisnus syndrome? Methods and Results: 93 patients with sick sinus syndrome were implanted 2 chambers pacemaker with mean aged 61,19±14,95 years old and 37,6% of male. The pacemaker parameters of ventricular lead include: Pacing thresholds were measured 0.75 ± 0.17 V, sensing amplitudes were measured 9,93 ± 4.01 mV, and lead impedances were measured 710,06 ± 130,86 ᾨ. The pacemaker parameters of atrial lead include: Pacing thresholds were measured 1,06 ± 0,29 V, sensing amplitudes were measured 2,58 ± 1,23 mV, and lead impedances were measured 509,13 ± 69,22 ᾨ. There is not significantly relationships of NT-ProBNP and pacemaker parameters of ventricular lead, atrial lead impedance, atrial lead sensing amplitudes (p>0,05). However, there is significantly relationship of NT-ProBNP and atrial lead pacing threshold (r=0,34; p=0,003). Conclusion: There is significantly relationship of NT proBNP and atr...
This paper proposes a method to mitigate two major issues of Adversarial Transformation Networks ... more This paper proposes a method to mitigate two major issues of Adversarial Transformation Networks (ATN) including the low diversity and the low quality of adversarial examples. In order to deal with the first issue, this research proposes a stacked convolutional autoencoder based on pattern to generalize ATN. This proposed autoencoder could support different patterns such as all-feature pattern , border feature pattern , and class model map pattern . In order to deal with the second issue, this paper presents an algorithm to improve the quality of adversarial examples in terms of L 0 -norm and L 2 -norm. This algorithm employs an adversarial feature ranking heuristics such as JSMA and COI to prioritize adversarial features. To demonstrate the advantages of the proposed method, comprehensive experiments have been conducted on the MNIST dataset and the CIFAR-10 dataset. For the first issue, the proposed autoencoder can generate diverse adversarial examples with the average success rate...
Đặt vấn đề: Áp xe trung thất (AXTT) là nhiễm khuẩn nặng, nguy cơ tử vong cao, nguyên nhân do bệnh... more Đặt vấn đề: Áp xe trung thất (AXTT) là nhiễm khuẩn nặng, nguy cơ tử vong cao, nguyên nhân do bệnh lý nhiễm khuẩn miệng, họng, đặc biệt liên quan đến tổn thương thực quản (TQ). Mục đích nghiên cứu chúng tôi mô tả một số đặc điểm lâm sàng và cận lâm sàng giúp cho chẩn đoán bệnh. Đối tượng và phương pháp nghiên cứu: Nghiên cứu tiến cứu các trường hợp chẩn đoán AXTT do tổn thương TQ được điều trị tại Bệnh viện Việt Đức từ 1/2016 đến 10/2019, bao gồm các trường hợp tử vong và nặng về. Chẩn đoán theo tiêu chuẩn của Estrera (1983), phân loại theo Endo S (1999). Kết quả: Tổng số có 40 trường hợp, tuổi trung bình: 48,5 ± 17,74 tuổi, nam giới chiếm 82,5 %. Nguyên nhân tổn thương TQ do chấn thương chiếm 70%, chủ yếu hóc xương; do bệnh lý 30%, trong đó hội chứng Boerhaave chiếm 62,5%. Vị trí tổn thương hay gặp nhất ở 1/3 trên (TQ cổ) chiếm 65%, TQ ngực (1/3 giữa) chiếm 15 %, và TQ ngực (1/3 dưới) 20%. Phân độ theo Endo: type I 28 bệnh nhân chiếm 70%, không có type IIa, type IIb có 12 trường ...
Effect of roasting on texture, colour, and nutrient content and sensory acceptability of soybean ... more Effect of roasting on texture, colour, and nutrient content and sensory acceptability of soybean was studied at four temparture (160, 180, 200 and 220 oC) and time (10, 15, 20 and 25 minutes) combinations. In general, hardness and toughness decreased with increased in roasting temperature and time except at 200 and 220 oC for 20 minutes. L* values of roasted soybean decreased at increased temperatures while a* values increased with increasing roasting temperature and time that affected to hue and chroma values of soybean. The highest sensory evaluation including colour, appearance, roasted odour and overall quality were found for soybean roasted at 200 oC for 20 minutes. Lipid and ash content of the roasted soybean was found to have increased following the roasting time and temperature. While the protein content of the soybean roasted decreased as the roasting time and temperature increased.
Objective: This study sought to evaluate the feasibility and safety of catheter ablation in pregn... more Objective: This study sought to evaluate the feasibility and safety of catheter ablation in pregnancy with limited fluoroscopy. Method: A case-control retrospective study. Results: Ten patients with tachycardia in pregnancy (age 26, 30 ± 4, 52 years; gestational age 26, 90 ± 2, 88 weeks) successfully underwent radiofrequency catheter ablation procedures with limited fluoroscopy. Type of tachycardia consisted of 2 patients with atrial tachycardia; 2 patients with ventricular tachycardia; 4 patients with atrioventricular reentrant tachycardia; 2 patients with atrioventricular nodal reentrant tachycardia. Procedure time, fluoroscopy time, total dose area product were 66, 50 ± 19, 86 minutes; 118, 80 ± 64, 38 seconds; 0, 73 ± 0, 64 Gy-cm2 respectively. There were not any complications during and after procedures. All pregnancy normally delivered healthy babies. Conclusion: Catheter ablation with limited fluoroscopy can be performed safely and with good outcomes in pregnancy.
The issue of gauge unification in the (non-supersymmetric) Standard Model is reinvestigated. It i... more The issue of gauge unification in the (non-supersymmetric) Standard Model is reinvestigated. It is found that with just an additional fourth generation of non-sequential and long-lived quarks and leptons, SU(3)⊗SU(2)⊗U(1) gauge couplings converge to a common point ∼ 3.5× 10 GeV (τp ∼ 10 34±1 years). This result is due to the non-negligiblebut still perturbative-contributions of the top and fourth generation Yukawa couplings to the gauge two-loop β functions, in contrast with the three generation case where such a contribution is too small to play an important role in unification. Typeset using REVTEX
Since 2002, Vietnam has implemented rice contract-farming policies to develop the linkage among s... more Since 2002, Vietnam has implemented rice contract-farming policies to develop the linkage among stakeholders in the agricultural sector; however, there is very low participation of farmers. Therefore, this study aims to determine the perception on both advantages and disadvantages of rice contract farming (RCF); identify the reasons for non-participation and drop-out of rice contract farming; and indicate the typology of contract by using data from documentation, key informant interviews, and focus group discussions. The results indicate that farmers considered the guaranteed output price and stable income as the most advantages of RCF while the main disadvantages were reducing the household’s freedom or losing flexibility in making decisions on-farm production, management, and selling product; possible delays in payments, in input delivery, in harvesting, and output delivery. In addition, farmers did not want to participate in RCF because of reducing the household’s freedom in maki...
Tách thành động mạch chủ là bệnh nặng nguy cơ tử vong cao. Can thiệp nội mạch điều trị bệnh lý độ... more Tách thành động mạch chủ là bệnh nặng nguy cơ tử vong cao. Can thiệp nội mạch điều trị bệnh lý động mạch chủ là phương pháp ít xâm lấn và hiệu quả. Nghiên cứu nhằm mục tiêu đánh giá hiệu quả của can thiệp nội mạch điều trị tách thành động mạch chủ cấp. Đây là nghiên cứu can thiệp không có đối chứng. Nghiên cứu 96 bệnh nhân có độ tuổi trung bình 59 ± 10 được chẩn đoán tách thành động mạch chủ cấp có biến chứng được can thiệp nội mạch. Tỷ lệ thành công về mặt kỹ thuật 97,9%. Tỷ lệ sống còn qua theo dõi thời gian trung bình 30 tháng là 91,67%, yếu tố vỡ động mạch chủ thì 1 làm tăng nguy cơ tử vong (HR = 4,46 với p = 0,03). Tái cấu trúc động mạch chủ sau can thiệp làm tăng kích thước lòng thật nhỏ nhất (19,4 ± 4,3 mm so với 24 ± 5,4 mm p < 0,05), giảm đường kính lòng giả lớn nhất (37,1 ± 11.4 mm so với 26,5 ± 13,1 mm p < 0,05). Như vậy can thiệp nội mạch điều trị bệnh nhân tách thành động mạch chủ Stanford B cấp có tỷ lệ sống còn cao và giúp tái cấu trúc động mạch chủ.
Low-resolution Analogue-to-Digital Converters (ADCs) is a promising solution to reduce power cons... more Low-resolution Analogue-to-Digital Converters (ADCs) is a promising solution to reduce power consumption for millimeter wave (mmWave) systems in which the number of antennas at base stations is very large. In this paper, we develop downlink user scheduling for mmWave systems using low-resolution ADCs. Although the sum-rate of Maximum Rate algorithm is very impressive in mmWave systems, it is difficult to use in practice, especially for a large number of users due to exhaustive search. Therefore, we proposed a novel scheduling, termed as NOUS, which selects users who are semi-orthogonal to each other in the beamspace. A closed-form expression for the scheduling criteria in the downlink channel over a mmWave system with low-resolution ADCs and Zero-forcing precoder is derived. The numerical results show that the NOUS algorithm almost achieves the performance of Maximum Rate with lower complexity and outperforms the performance of Proportional Fair in terms of the sum rate.
Journal of Research and Development on Information and Communication Technology, 2015
Automated user interaction testing of Web applications has been received great attentions... more Automated user interaction testing of Web applications has been received great attentions from the research community and industry. Currently, several available tools are proposed to partly deal withthe problem. However, how to perform the automated user interaction testing of whole Web applications effectively is still an open problem. This research proposes a method and develops a tool supporting automated user interaction testing of whole Web applications. In this method, the model of each Web page of the Web application under testing which describes the user interaction (UI) is represented by a finite state automaton. The whole model that describes the behaviors of the whole Web application then is constructed by composing the models of all Web pages. After that, test paths are generated automatically based on the compositional model of the Web application so that these test paths cover a...
In this talk, I will present a new pespective on the origin of a phenomenologically very successf... more In this talk, I will present a new pespective on the origin of a phenomenologically very successful model of quark mass hierarchy: the pure phase mass matrix. Two extra compact spatial dimensions are introduced. In addition, a scenario is presented, in which standard fermions “live” inside a thick brane whose thickness is of the size of the compact dimension. Fermions are “localized” inside the thick brane by domain walls. These “locations” along the sixth dimension determine the nature of the pure phase mass matrix: In one instance, it is hermitian and at another instance, it is non hermitian. The latter case requires the breaking of both the symmetry between left‐handed and right‐handed fermions, as well as the family symmetry.
The dialect identification was studied for many languages over the world nevertheless the researc... more The dialect identification was studied for many languages over the world nevertheless the research on signal processing for Vietnamese dialects is still limited and there were not many published works. There are many different dialects for Vietnamese. The influence of dialectal features on speech recognition systems is important. If the information about dialects is known during speech recognition process, the performance of recognition systems will be better because the corpus of these systems is normally organized according to different dialects. This paper will present the combination of MFCC coefficients and fundamental frequency features of Vietnamese for dialectal identification based on GMM. The experiment result for the dialect corpus of Vietnamese shows that the performance of dialectal identification is increased from 59% for the case using only MFCC coefficients to 71% for the case using MFCC coefficients and the information of fundamental frequency.
Đặt vấn đề: Áp xe trung thất (AXTT) do thủng thực quản (TQ) đã được biết đến từ lâu là nhiễm khuẩ... more Đặt vấn đề: Áp xe trung thất (AXTT) do thủng thực quản (TQ) đã được biết đến từ lâu là nhiễm khuẩn nặng, nguy cơ tử vong cao. Mục đích nghiên cứu đánh giá kết quả điều trị phẫu thuật AXTT tại bệnh viện Việt Đức. Đối tượng và phương pháp nghiên cứu: Nghiên cứu tiến cứu kết hợp hồi cứu các trường hợp chẩn đoán AXTT do thủng TQ được điều trị tại bệnh viện Việt Đức từ 1/2016 đến 3/2019, bao gồm các trường hợp tử vong. Chẩn đoán AXTT theo tiêu chuẩn của Estrera (1983), Số liệu được xử lý bằng phần mềm SPSS 20.0. Nghiên cứu được thông qua hội đồng khoa học của bệnh viện. Kêt quả: Tổng số 40 ca, tỷ lệ nam: nữ 4,7: 1; Tuổi từ 36 đến 60 tuổi chiếm 60%. Chấn thương 70%, bệnh lý 30%. Do hóc xương chiếm 88,5%. Thủng ở 1/3 trên TQ 57,5%, 1/3 giữa TQ 22,5 %, và 1/3 dưới TQ 20%. Type I chiếm 55%, type IIb chiếm 45%, không có type IIa. Phương pháp điều trị phẫu thuật: Dẫn lưu đơn thuần 82,1%, mở ngực 17,9%. Trong dẫn lưu có dẫn lưu cổ 40,6%; Dẫn lưu ngực 31,2%, Dẫn lưu cổ + Ngực 28,1%. Trong m...
Tạp chí Phẫu thuật Tim mạch và Lồng ngực Việt Nam, 2021
Objectives: Use of the HAS-BLED score in risk stratifying patients on dual antiplatelet therapy a... more Objectives: Use of the HAS-BLED score in risk stratifying patients on dual antiplatelet therapy after stent placement. Methods & Results: 304 patients who underwent stent placement from June, 2018 to December 2018. There is 6,57% patients with medium & severe bleeding. Area under the curve of HAS-BLED score (AUC); PRECISE-DAPT score and CRUSADE were sequential 0.59; 0,79 and 0,84 (p=0,0001) at post-PCI procedures; were sequential 0,72; 0,94 và 0,88 (p=0,00001) at less than 6 months after PCI procedures, and were sequential 0,87; 0,73 và 0,70 (p=0,0068) at more than 6 months after PCI procedures. Conclusion: the HAS-BLED score was most useful for predicting bleeding in patients on on dual antiplatelet therapy after stent placement at more than 6 months after PCI procedures. PRECISE-DAPT score was most useful for predicting bleeding at less than 6 months after PCI procedures and CRUSADE score was most useful for predicting bleeding at post procedure.
Tạp chí Phẫu thuật Tim mạch và Lồng ngực Việt Nam, 2021
Objectives: NT-ProBNP could influence the pacemaker parameters in patients with sick sisnus syndr... more Objectives: NT-ProBNP could influence the pacemaker parameters in patients with sick sisnus syndrome? Methods and Results: 93 patients with sick sinus syndrome were implanted 2 chambers pacemaker with mean aged 61,19±14,95 years old and 37,6% of male. The pacemaker parameters of ventricular lead include: Pacing thresholds were measured 0.75 ± 0.17 V, sensing amplitudes were measured 9,93 ± 4.01 mV, and lead impedances were measured 710,06 ± 130,86 ᾨ. The pacemaker parameters of atrial lead include: Pacing thresholds were measured 1,06 ± 0,29 V, sensing amplitudes were measured 2,58 ± 1,23 mV, and lead impedances were measured 509,13 ± 69,22 ᾨ. There is not significantly relationships of NT-ProBNP and pacemaker parameters of ventricular lead, atrial lead impedance, atrial lead sensing amplitudes (p>0,05). However, there is significantly relationship of NT-ProBNP and atrial lead pacing threshold (r=0,34; p=0,003). Conclusion: There is significantly relationship of NT proBNP and atr...
This paper proposes a method to mitigate two major issues of Adversarial Transformation Networks ... more This paper proposes a method to mitigate two major issues of Adversarial Transformation Networks (ATN) including the low diversity and the low quality of adversarial examples. In order to deal with the first issue, this research proposes a stacked convolutional autoencoder based on pattern to generalize ATN. This proposed autoencoder could support different patterns such as all-feature pattern , border feature pattern , and class model map pattern . In order to deal with the second issue, this paper presents an algorithm to improve the quality of adversarial examples in terms of L 0 -norm and L 2 -norm. This algorithm employs an adversarial feature ranking heuristics such as JSMA and COI to prioritize adversarial features. To demonstrate the advantages of the proposed method, comprehensive experiments have been conducted on the MNIST dataset and the CIFAR-10 dataset. For the first issue, the proposed autoencoder can generate diverse adversarial examples with the average success rate...
Đặt vấn đề: Áp xe trung thất (AXTT) là nhiễm khuẩn nặng, nguy cơ tử vong cao, nguyên nhân do bệnh... more Đặt vấn đề: Áp xe trung thất (AXTT) là nhiễm khuẩn nặng, nguy cơ tử vong cao, nguyên nhân do bệnh lý nhiễm khuẩn miệng, họng, đặc biệt liên quan đến tổn thương thực quản (TQ). Mục đích nghiên cứu chúng tôi mô tả một số đặc điểm lâm sàng và cận lâm sàng giúp cho chẩn đoán bệnh. Đối tượng và phương pháp nghiên cứu: Nghiên cứu tiến cứu các trường hợp chẩn đoán AXTT do tổn thương TQ được điều trị tại Bệnh viện Việt Đức từ 1/2016 đến 10/2019, bao gồm các trường hợp tử vong và nặng về. Chẩn đoán theo tiêu chuẩn của Estrera (1983), phân loại theo Endo S (1999). Kết quả: Tổng số có 40 trường hợp, tuổi trung bình: 48,5 ± 17,74 tuổi, nam giới chiếm 82,5 %. Nguyên nhân tổn thương TQ do chấn thương chiếm 70%, chủ yếu hóc xương; do bệnh lý 30%, trong đó hội chứng Boerhaave chiếm 62,5%. Vị trí tổn thương hay gặp nhất ở 1/3 trên (TQ cổ) chiếm 65%, TQ ngực (1/3 giữa) chiếm 15 %, và TQ ngực (1/3 dưới) 20%. Phân độ theo Endo: type I 28 bệnh nhân chiếm 70%, không có type IIa, type IIb có 12 trường ...
Effect of roasting on texture, colour, and nutrient content and sensory acceptability of soybean ... more Effect of roasting on texture, colour, and nutrient content and sensory acceptability of soybean was studied at four temparture (160, 180, 200 and 220 oC) and time (10, 15, 20 and 25 minutes) combinations. In general, hardness and toughness decreased with increased in roasting temperature and time except at 200 and 220 oC for 20 minutes. L* values of roasted soybean decreased at increased temperatures while a* values increased with increasing roasting temperature and time that affected to hue and chroma values of soybean. The highest sensory evaluation including colour, appearance, roasted odour and overall quality were found for soybean roasted at 200 oC for 20 minutes. Lipid and ash content of the roasted soybean was found to have increased following the roasting time and temperature. While the protein content of the soybean roasted decreased as the roasting time and temperature increased.
Objective: This study sought to evaluate the feasibility and safety of catheter ablation in pregn... more Objective: This study sought to evaluate the feasibility and safety of catheter ablation in pregnancy with limited fluoroscopy. Method: A case-control retrospective study. Results: Ten patients with tachycardia in pregnancy (age 26, 30 ± 4, 52 years; gestational age 26, 90 ± 2, 88 weeks) successfully underwent radiofrequency catheter ablation procedures with limited fluoroscopy. Type of tachycardia consisted of 2 patients with atrial tachycardia; 2 patients with ventricular tachycardia; 4 patients with atrioventricular reentrant tachycardia; 2 patients with atrioventricular nodal reentrant tachycardia. Procedure time, fluoroscopy time, total dose area product were 66, 50 ± 19, 86 minutes; 118, 80 ± 64, 38 seconds; 0, 73 ± 0, 64 Gy-cm2 respectively. There were not any complications during and after procedures. All pregnancy normally delivered healthy babies. Conclusion: Catheter ablation with limited fluoroscopy can be performed safely and with good outcomes in pregnancy.
The issue of gauge unification in the (non-supersymmetric) Standard Model is reinvestigated. It i... more The issue of gauge unification in the (non-supersymmetric) Standard Model is reinvestigated. It is found that with just an additional fourth generation of non-sequential and long-lived quarks and leptons, SU(3)⊗SU(2)⊗U(1) gauge couplings converge to a common point ∼ 3.5× 10 GeV (τp ∼ 10 34±1 years). This result is due to the non-negligiblebut still perturbative-contributions of the top and fourth generation Yukawa couplings to the gauge two-loop β functions, in contrast with the three generation case where such a contribution is too small to play an important role in unification. Typeset using REVTEX
Since 2002, Vietnam has implemented rice contract-farming policies to develop the linkage among s... more Since 2002, Vietnam has implemented rice contract-farming policies to develop the linkage among stakeholders in the agricultural sector; however, there is very low participation of farmers. Therefore, this study aims to determine the perception on both advantages and disadvantages of rice contract farming (RCF); identify the reasons for non-participation and drop-out of rice contract farming; and indicate the typology of contract by using data from documentation, key informant interviews, and focus group discussions. The results indicate that farmers considered the guaranteed output price and stable income as the most advantages of RCF while the main disadvantages were reducing the household’s freedom or losing flexibility in making decisions on-farm production, management, and selling product; possible delays in payments, in input delivery, in harvesting, and output delivery. In addition, farmers did not want to participate in RCF because of reducing the household’s freedom in maki...
Tách thành động mạch chủ là bệnh nặng nguy cơ tử vong cao. Can thiệp nội mạch điều trị bệnh lý độ... more Tách thành động mạch chủ là bệnh nặng nguy cơ tử vong cao. Can thiệp nội mạch điều trị bệnh lý động mạch chủ là phương pháp ít xâm lấn và hiệu quả. Nghiên cứu nhằm mục tiêu đánh giá hiệu quả của can thiệp nội mạch điều trị tách thành động mạch chủ cấp. Đây là nghiên cứu can thiệp không có đối chứng. Nghiên cứu 96 bệnh nhân có độ tuổi trung bình 59 ± 10 được chẩn đoán tách thành động mạch chủ cấp có biến chứng được can thiệp nội mạch. Tỷ lệ thành công về mặt kỹ thuật 97,9%. Tỷ lệ sống còn qua theo dõi thời gian trung bình 30 tháng là 91,67%, yếu tố vỡ động mạch chủ thì 1 làm tăng nguy cơ tử vong (HR = 4,46 với p = 0,03). Tái cấu trúc động mạch chủ sau can thiệp làm tăng kích thước lòng thật nhỏ nhất (19,4 ± 4,3 mm so với 24 ± 5,4 mm p < 0,05), giảm đường kính lòng giả lớn nhất (37,1 ± 11.4 mm so với 26,5 ± 13,1 mm p < 0,05). Như vậy can thiệp nội mạch điều trị bệnh nhân tách thành động mạch chủ Stanford B cấp có tỷ lệ sống còn cao và giúp tái cấu trúc động mạch chủ.
Low-resolution Analogue-to-Digital Converters (ADCs) is a promising solution to reduce power cons... more Low-resolution Analogue-to-Digital Converters (ADCs) is a promising solution to reduce power consumption for millimeter wave (mmWave) systems in which the number of antennas at base stations is very large. In this paper, we develop downlink user scheduling for mmWave systems using low-resolution ADCs. Although the sum-rate of Maximum Rate algorithm is very impressive in mmWave systems, it is difficult to use in practice, especially for a large number of users due to exhaustive search. Therefore, we proposed a novel scheduling, termed as NOUS, which selects users who are semi-orthogonal to each other in the beamspace. A closed-form expression for the scheduling criteria in the downlink channel over a mmWave system with low-resolution ADCs and Zero-forcing precoder is derived. The numerical results show that the NOUS algorithm almost achieves the performance of Maximum Rate with lower complexity and outperforms the performance of Proportional Fair in terms of the sum rate.
Journal of Research and Development on Information and Communication Technology, 2015
Automated user interaction testing of Web applications has been received great attentions... more Automated user interaction testing of Web applications has been received great attentions from the research community and industry. Currently, several available tools are proposed to partly deal withthe problem. However, how to perform the automated user interaction testing of whole Web applications effectively is still an open problem. This research proposes a method and develops a tool supporting automated user interaction testing of whole Web applications. In this method, the model of each Web page of the Web application under testing which describes the user interaction (UI) is represented by a finite state automaton. The whole model that describes the behaviors of the whole Web application then is constructed by composing the models of all Web pages. After that, test paths are generated automatically based on the compositional model of the Web application so that these test paths cover a...
In this talk, I will present a new pespective on the origin of a phenomenologically very successf... more In this talk, I will present a new pespective on the origin of a phenomenologically very successful model of quark mass hierarchy: the pure phase mass matrix. Two extra compact spatial dimensions are introduced. In addition, a scenario is presented, in which standard fermions “live” inside a thick brane whose thickness is of the size of the compact dimension. Fermions are “localized” inside the thick brane by domain walls. These “locations” along the sixth dimension determine the nature of the pure phase mass matrix: In one instance, it is hermitian and at another instance, it is non hermitian. The latter case requires the breaking of both the symmetry between left‐handed and right‐handed fermions, as well as the family symmetry.
The dialect identification was studied for many languages over the world nevertheless the researc... more The dialect identification was studied for many languages over the world nevertheless the research on signal processing for Vietnamese dialects is still limited and there were not many published works. There are many different dialects for Vietnamese. The influence of dialectal features on speech recognition systems is important. If the information about dialects is known during speech recognition process, the performance of recognition systems will be better because the corpus of these systems is normally organized according to different dialects. This paper will present the combination of MFCC coefficients and fundamental frequency features of Vietnamese for dialectal identification based on GMM. The experiment result for the dialect corpus of Vietnamese shows that the performance of dialectal identification is increased from 59% for the case using only MFCC coefficients to 71% for the case using MFCC coefficients and the information of fundamental frequency.
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