bluuebunny/crossref_metadata_2025 huggingface dataset:
The rate of salmonella spp. from healthy people in Ho Chi Minh city in 2018
Authors: Nguyen Ly Hoang Ngan , Nguyen Do Phuc , Huynh Thi Kim Phan , Nguyen Thi Anh Dao ,   Institute of Public Health Ho Chi Minh City,   Institute of Public Health Ho Chi Minh City,   Institute of Public Health Ho Chi Minh City,   Institute of Public Health Ho Chi Minh City
Published: January 2021

Survey results of 226 stool samples from healthy people collected from four districts in Ho Minh city in 2018 (districts no. 1, 5, 8 and 9) showed that the number of people carrying Salmonella spp. was 12/226 (5.3%). Twelve fecal samples were positive for Salmonella spp. with 15 Salmonella spp. strains isolated. Three of them are S. Indiana (20.0%); S. Typhimurium, S. Rissen and S. Give. Each has two strains (13.3%): 1 strain has serotypes O: 1 and one strains has 9: 1.5 (6.7%). These Salmonella strains belong to the non-typhoid group (the group that causes diarrhea). The Salmonella spp. strains isolated have highest antibiotic resistance to ampicillin, tetracycline, chloramphenicol (80.0%); followed by sulfamethoxazole/trimethoprim (66.7%); nalidixic acid (40.0%); gentamicin, ciprofloxacin, kanamycin (26.7%). Strains resistant to the third generation cephalosporins were found (cefotaxime and ceftazidime). Three of these are resistant to both types of antibiotics (20.0%). No strains resistance to cefoxitin and cosfomycin were detected.
Bước đầu nghiên cứu khảo sát hàm lượng Acrylanmide trong một số loại thực phẩm giàu tinh bột chế biến sẵn trên địa bàn thành phố Hà Nội
Authors: Đặng Thế Hưng , Nguyễn Thị Hường , Vũ Thị Bích Phương , Nguyễn Văn Long , Đào Thị Thanh Dịu , Chu Mạnh Linh ,   Trung Tâm Xét Nghiệm,Trường Đại học Y tế Công cộng,   Trung Tâm Xét Nghiệm,Trường Đại học Y tế Công cộng,   Trung Tâm Xét Nghiệm,Trường Đại học Y tế Công cộng,   Trung Tâm Xét Nghiệm,Trường Đại học Y tế Công cộng,   Trung Tâm Xét Nghiệm,Trường Đại học Y tế Công cộng,   Trung Tâm Xét Nghiệm,Trường Đại học Y tế Công cộng
Published: January 2021

Đặt vấn đề: Acrylamide là một chất độc hình thành trong thực phẩm giàu tinh bột khi chế biến ở nhiệt độ cao (Ví dụ snack khoai tây, mỳ tôm,…). Các nghiên cứu đã chứng minh rằng acrylamdie là một tác nhân có khả năng gây ung thư ở người và động vật. Để bước đầu đánh giá tình trạng nhiễm acrylamide trong một số thực phẩm, nghiên cứu sử dụng sắc ký lỏng ghép nối khối phổ (LC-MS/MS) để xác định hàm lượng acrylamide trong một số thực phẩm giàu tinh bột chế biến sẵn đang lưu hành trên địa bàn Hà nội được thực hiện. Mục tiêu: Thẩm định phương pháp xác định acrylamide trong thực phẩm bằng LC-MS/MS Ứng dụng phương pháp đã được xây dựng để xác định hàm lượng acrylamide trong một số sản phẩm giàu tinh bột chế biến sẵn đang lưu hành trên địa bàn thành phố Hà Nội Phương pháp nghiên cứu: Đây là phương pháp nghiên cứu mô tả cắt ngang. Mẫu được lấy ngẫu nhiên tại một sốcửa hàng trên địa bàn thành phố Hà nội. Hàm lượng acrylamide được xác định bằngphương pháp sắc ký lỏng ghép nối khối phổ (LC‐MS/MS). Kết quả: Nghiên cứu đã xây dựng được phương pháp định lượng acryamide trong mẫu snack khoai tây chiên bằng LC/MS-MS. Với giá trị giới hạn định lượng LOQ là24,82 ng/mL; khoảng tuyến tính từ 25 đến 2500 ng/mL, độ đúng và độ lặp lại đạt theo yêu cầu của AOAC, phương pháp phân tích đã được sử dụng để xác định acrylamide trong một số mẫu snack khoai tây chiên thu thập trên địa bạn Hà nội. Hàm lượng acrylamide trong mẫuđược xác định dao độngtừ 58mg kg-1 đến1830mg kg-1. Kết luận: Kết quả khảo sát cho thấy 100% mẫu snack khoai tây kiểm tra có chứa acrylamide, nhưng hàm lượng trong mẫu khảo sát thấp hơn so với kết quả khảo sát năm 2009 ở châu Âu.
Xác định hàm lượng Crinamidin trong một số thực phẩm chức năng bằng GC-MS/MS
Authors: Lê Thị Liên , Bạch Thúy Anh , Cao Công Khánh , Trần Nguyên Hà , Lê Thị Hồng Hảo ,   Trường đại học Dược Hà Nội,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Trường đại học Dược Hà Nội,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia
Published: January 2021

Phương pháp xác định hàm lượng Crinamidin bằng sắc ký khí khối phổ hai lần (GC-MS/MS) đã được xây dựng và thẩm định trên nền mẫu thực phẩm chức năng. Phương pháp được thực hiện trên cột DB5-MS, kết hợp với detector khối phổ ba tứ cực. Phương pháp được đánh giá về độ đặc hiệu, đường chuẩn, độ đúng, độ chụm, giới hạn phát hiện (LOD) và giới hạn định lượng (LOQ). Đường chuẩn được xây dựng trong khoảng nồng độ từ 5ppm-50ppm với hệ số tương quan là 0,9970. Độ thu hồi với ba mức nồng độ đều đạt trên 90,1%. Giới hạn phát hiện và giới hạn định lượng của phương pháp lần lượt là 3 và 10 mg/kg. Tất cả các kết quả thu được đều đáp ứng yêu cầu của AOAC trên nền mẫu thực phẩm chức năng. Phương pháp được ứng dụng để phân tích 34 mẫu thực tế trên địa bàn Hà Nội.
Nghiên cứu phương pháp xác định một số steviol glycoside trong thực phẩm bằng phương pháp sắc ký lỏng khối phổ (LC/MS/MS)
Authors: Lưu Thị Huyền Trang , Vũ Thị Kim Oanh , Vũ Thị Trang , Nguyễn Thị Biển ,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia
Published: January 2021

Nghiên cứu này phát triển phương pháp xác định đồng thời mốt số steviol glycoside trong nền mẫu thực phẩm bằng LC-MS/MS. Các chất phân tích được chiết siêu âm ra khỏi nền mẫu bằng methanol ở 40°C trong 60 phút, tách bằng sắc ký lỏng sử dụng cột C18 (100 mm x 2 mm x 3,5 μm), định lượng bằng detector khối phổ với chế độ ESI (-). Thẩm định phương pháp cho kết quả đường chuẩn tuyến tính trong khoảng 0,1 - 20 µg/mL; RSD 1,74 - 5,01%; độ thu hồi 90 – 105% đạt yêu cầu AOAC. Ứng dụng phương pháp phân tích 19 mẫu thực phẩm thu thập trên thị trường (bao gồm cỏ ngọt khô, đường nguyên liệu cỏ ngọt, trà cỏ ngọt, nước giải khát) cho thấy thành phần các steviol glycoside khác nhau trong các đối tượng mẫu khác nhau nhưng hàm lượng chiếm tỷ lệ lớn là stevioside và steviodioside A.
Xác định hàm lượng một số Acid Sialic trong thực phẩm bảo vệ sức khỏe bằng kỹ thuật sắc ký lỏng khối phổ hai lần (LC-MS/MS)
Authors: Nguyễn Thị Hồng Ngọc , Mạc Thị Thanh Hoa , Dương Thị Mai Hoa , Trần Hùng Sơn , Cao Công Khánh , Phạm Thị Thanh Hà , Lê Thị Hồng Hảo ,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia,   Trường Đại học Dược Hà Nội,   Viện Kiểm nghiệm an toàn vệ sinh thực phẩm quốc gia
Published: January 2021

Phương pháp định lượng đồng thời một số hoạt chất nhóm acid sialic (N-acetyl neuraminic acid - NANA và N-glycolyl neuraminic acid - NGNA) bằng kỹ thuật sắc ký lỏng khối phổ hai lần (LC-MS/MS) đã được nghiên cứu và khảo sát trên nền mẫu thực phẩm bảo vệ sức khỏe (TPBVSK). Quá trình phân tách được thực hiện với cột C18 (75 mm x 3,9 mm, 2,5 µm) và pha động đẳng dòng gồm acid formic 0,1 %: acetonitrile (80:20, v/v). Các acid sialic trong tự nhiên tồn tại ở dạng liên hợp được thủy phân bằng acid formic 1M ở 80oC trong 2 giờ trước khi phân tích trên thiết bị LC-MS/MS. Kết quả thẩm định cho thấy phương pháp có độ đặc hiệu và độ chọn lọc tốt, đường chuẩn tuyến tính trong khoảng 0,04 - 4,25 µg/ml, độ lặp lại và độ thu hồi đáp ứng được yêu cầu phân tích theo AOAC. Phương pháp đã được áp dụng để phân tích 45 mẫu TPBVSK trên thị trường.
Xác định hàm lượng sibutramin và phenolphthalein trong trà, cà phê, sữa giảm cân bằng phương pháp sắc ký lỏng siêu hiệu năng ghép nối khối phổ UPLC-MS/MS
Authors: Trương Văn Thân , Nguyễn Thành Duy , Lý Tuấn Kiệt , Hoàng Ngọc Vinh , Chu Vân Hải ,   Trung tâm dịch vụ phân tích thí nghiệm Tp. Hồ Chí Minh,   Trung tâm dịch vụ phân tích thí nghiệm Tp. Hồ Chí Minh,   Trung tâm dịch vụ phân tích thí nghiệm Tp. Hồ Chí Minh,   Trung tâm dịch vụ phân tích thí nghiệm Tp. Hồ Chí Minh,   Trung tâm dịch vụ phân tích thí nghiệm Tp. Hồ Chí Minh
Published: January 2021

Một phương pháp nhanh chóng, đơn giản và hiệu quả để xác định sibutramin và phenolphthalein trong trà, cà phê, sữa giảm cân và được phát triển bằng phương pháp sắc ký lỏng siêu hiệu năng kết hợp với đầu dò khối phổ (mass spectrometry). Kỹ thuật QuEChERS được sử dụng để làm sạch các nền mẫu. Dịch chiết sau đó được tách trên cột sắc ký lỏng C18 bằng hỗn hợp nước loại ion và acetonitril, với 0,1% acid formic. Hiệu suất thu hồi ở nồng độ 50 µg/kg đạt được từ 90,1 ­ 105,8 (RSDR 4,04 ­ 4,24%) đối với trà giảm cân và từ 91,9 ­ 100,2 (RSDR 3,20 ­ 4,71%) đối với cà phê giảm cân và 86,5 ­ 100,5% (RSDR 5,17 ­ 5,49%) đối với sữa giảm cân. Giới hạn định lượng 30 µg/kg cho cả 3 nền mẫu.
Food poisoning assessment in Ba Ria - Vung Tau, 2016 - 2018
Authors: Tieu Van Linh , Dinh Thi Ngan ,   Department of Food Hygiene and Safety of Ba Ria – Vung Tau Province,   Department of Food Hygiene and Safety of Ba Ria – Vung Tau Province
Published: January 2021

Food poisoning could cause serious health issues. In this report, the statistical data about food poisoning available from 2016 to 2018 in Ba Ria - Vung Tau province was analyzed. The aim is to outline basic strategic action plans for addressing key factors that affected food safety in the region. It was found that there were annually 03 cases of foodborne outbreaks with 68 infected people and 01 fatality. The most common causes of food poisoning were microorganisms (72.41%), followed by chemical pesticides (21.83%) and the least were natural toxins (5.74%). Foodborne outbreaks normally occurred in residential kitchens (55.56%), factory canteen (22.22%), and restaurants (22.22%).
Lead accumulation in fish oreochromis niloticus and human health risk assessment for consumers
Authors: Nguyen Minh Tri , Tran Thi Nhu Xuan , Nguyen Hai Phong ,   University of Science, Hue University,   University of Science, Hue University,   University of Science, Hue University
Published: January 2021

Tilapia (Oreochromis niloticus) is very popular in the daily meals of many families in Vietnam. However, lead accumulation in this type of fish has not been taken specifically. Results showed that the nile tilapia in several lakes in the Hue city contented high levels of Pb content exceeding the permitted levels issued by the Ministry of Health. Therefore, consuming them may not be safe. The BSAF bioaccumulative coefficient of Pb was low and there was a strong correlation between Pb contents in sediment and in the flesh of the fish. The risk quotient (RQ) higher than 1 indicated that consuming fish exploited from these areas may endanger users’ health.
Determination of mercury species in seafood by liquid chrom tography - inductively coupled plasma mass spectrometry (LC-ICP-MS)
Authors: Pham Cong Hieu , Dinh Viet Chien , Nguyen Van Ri , Nguyen Thi Anh Huong , Le Thi Hong Hao , Nguyen Thi Minh Loi ,   National Institute for Food Control, Vietnam,   National Institute for Food Control, Vietnam,   VNU University of Science, Vietnam National University­Hanoi,   VNU University of Science, Vietnam National University­Hanoi,   National Institute for Food Control, Vietnam,   Quang Binh University
Published: January 2021

Liquid chromatography hyphenated with inductively coupled plasma mass spectrometry (LC­ICP­MS) was investigated to simultaneously determine three mercury species (mercury methyl mercury and ethyl mercury) in seafood samples. Important parameters such as organic solvents, flow rate of the mobile phase, 2­mercaptoethanol concentration, extraction time and temperature were optimized. The method was validated in term of the limit of detection, limit of quantitation, repeatability, and recovery meeting the AOAC performance requirements. The method has also been validated based on the analysis of certified standard samples DORM­4, then applied to determine three mercury species in 30 seafood samples. Results showed that the content of mercury species was below the maximum limit according to the QCVN 8­2 : 2011/BYT.
Assessment of listeria monocytogenes, staphylococcus aureus and salmonella SPP. Contamination in dairy samples collected in Gia Lam and Ba Vi, Hanoi early 2019
Authors: Nguyen Thi Minh Huyen , Tran Thi Hoa , Ninh Thi Tuyet Lan , Tran Thi Hien ,   Institute of Biotechnology, Vietnam Academy of Science and Technology,   Institute of Biotechnology, Vietnam Academy of Science and Technology,   Institute of Biotechnology, Vietnam Academy of Science and Technology,   VNU University of Science, National University, Hanoi Vietnam
Published: January 2021

Milk and dairy products from dairy farms around Hanoi greatly contribute to the consumed milk quantity in Hanoi. The use of fresh milk or pasteurized milk becomes more and more popular in the daily life of local people. Milk and dairy products were widely sold in numerous stores, particularly in Xuan Mai, Ba Vi, Phu Dong and Gia Lam. However, there have not yet been any studies to assess the pathogenic bacterial contamination of these products. In our study, 49 samples including 23 raw milk samples, 12 pasteurized milk samples, and 14 yogurt samples were collected in order to examine the presence of food­born pathogenic bacteria such as Listeria monocytogenes, Staphylococcus aureus, Salmonella spp. using PCR method. This fast and accurate method works based on the specific amplification of tested bacterial DNA. The results showed that one of the samples may contain Staphylococcus aureus while another may be contaminated with Listeria monocytogenes. None of the samples was contaminated with Salmonella spp. The results were confirmed by gene sequencing.
Simultaneous determination of Rutin, Hesperidin and Quercetin contents in solid dietary supplements by high performance liquid chromatography
Authors: Nguyen Thi Thanh Phuong , Nguyen Thi Hong Hanh , Dam Thi Thu ,   Hanoi Drugs, Cosmetics, Food Quality Control Center,   Hanoi Drugs, Cosmetics, Food Quality Control Center,   Hanoi Drugs, Cosmetics, Food Quality Control Center
Published: January 2021

Simultaneous determination of rutin, hesperidin and quercetin contents in several solid dietary supplement samples is possible by HPLC method. The analysis process usedthe Agilent Zorbax Eclipse XDB C18 column (250 x 4.6 mm; 5 µm), a mobile phase composed of acetonitrile - phosphoric acid solution 0.1% with gradient program. The detection was carried out on a DAD detector at 280 nm for hesperidin and at 254 nm for rutin and quercetin. The limit of quantitation of method was at a low level of concentration (0.021g/100g with rutin, 0.047g/100g with hesperidin and 0.0054g/100g with quercetin); the accuracy of the method was within 97.0 - 101.33%; the precision showed 1.11 - 1.92% of relative standard deviation which showed high repeatability of the method. The method was applied to 20 dietary supplements samples, the results indicated a high level for the selectivity and reliability of the method to be applied.
REACTIVE POWER COMPENSATION AND VOLTAGESTABILIZATION FOR WIND POWER IN A WEAK DISTRIBUTION NETWORK
Authors: ANANTWAR HARSHA , B.S SUDARSHAN , T. R. SRINIVAS , GURUNG VISHAL SINGH , CHAKRAVARTHY ASHISH LAL
Published: January 2021

One of the most promising alternate sources of energy is wind energy. Energy of the wind is converted to electrical energy in wind farms and is then connected to a weak distribution network to supply local loads. Most wind farms use induction generators for electricity generation. These induction generators draw excessive reactive power for their operation and this causes shortage of reactive power in the system and leads to voltage collapse. This problem is simulated on PSCAD/EMTDC platform. For static compensation, capacitor banks are used and for dynamic compensation, Static Var Compensators (SVCs) are used.
LOW POWER ASIC IMPLEMENTATION OF A 256 BIT KEY AES CRYPTO-PROCESSOR AT 45NM TECHNOLOGY
Authors: R ASHWIN , BHUSARE SAROJA S
Published: January 2021

Advanced Encryption Standard (AES), has received significant interest over the past decade due to its performance and security level. Low power devices have gained extreme importance in market today. Power dissipation is one of the most important design constraints to be handled well. A key to successful power management is automatic power reduction. This enables designers to meet their power budgets without adversely affecting their productivity or time to market. In this paper power gating techniques applied on AES crypto-processor is depicted. The goal of power gating is to minimize leakage power by temporarily cutting power off to selective blocks that are not required in the current operation. This AES design was implemented using Verilog HDL and synthesized with Synopsys DC Compiler using Nangate 45 nm open cell library, physical design implementation and power gating was performed using SOC Encounter and achieved a power reduction up to 40%.
PERFORMANCE EVALUTION OF CNTFET-BASED SRAM CELL DESIGN
Authors: MUROTIYA SNEH LATA , MATTA ARAVIND , GUPTA ANU
Published: January 2021

Carbon Nanotube Field-Effect Transistor (CNTFET) technology with their excellent current capabilities, ballistic transport operation and superior thermal conductivities has proved to be a very promising and superior alternative to the conventional CMOS technology. A detailed analysis and simulation based assessment of circuit performance of this technology is presented here. As figures of merit speed, power consumption and stability are considered to evaluate the performance parameters of CNTFET-Based SRAM Cells with different chiral vectors for the optimum performance. A novel performance metric, presented as “SPR,” is used to assess these figures of merit. This comprehensive metric includes a metric of low power delay product (PDP) for write operation and high stability in the operation of a memory cell. It is shown that an 8T SRAM cell provides 73% higher SPR than Dual-Chiral based 6T SRAM cell for CNT technology and 124% higher SPR than its CMOS counterpart, thus attaining superior performance. The CNTFET-based 8T SRAM cell demonstrates that it provides high stability, low delay and low power, which is better than CNTFET-based 6T SRAM cell as well as CMOS SRAM cell.
MEASURING THE PROCESS EFFICIENCY OF CONTROLLED WELDING PROCESSES
Authors: ANWAR M. SAQUIB , UNTAWALE S P
Published: January 2021

This The process efficiency in Seem and Arc Welding is a crucial input to Mathematical models of the process and requires the use of an accurate welding calorimeter. In this paper we compare a liquid nitrogen calorimeter with an insulated box calorimeter for measuring the process efficiency of Fronius CMT, Lincoln STT and Rapid Arc, Kemppi FastRoot and standard pulsed GMAW. All the controlled dip transfer processes had a process efficiency of around 85% when measured with the liquid nitrogen calorimeter.
ON-BOARD MONITORING OF CRACK AND CORROSION USING WIRELESS NETWORK
Authors: S NISHA.M.
Published: January 2021

Structural health monitoring is an important safety factor in aviation that might benefit from advanced smart systems for damage sensing. This paper presents a new concept for a wireless crack and corrosion detection system for onboard health monitoring of aircraft. The sensor which is use to identify the structural damage and material loss on the surface of the aircraft by Ferrous Fluid under magnetic field. The Ferro fluid shall be applied as an emulsion on the test substrate. When a crack occurs, due to the crack there will a flux leakage. By constantly monitoring the flux on the surface of the substrate, whenever there is a flux leakage we can correlate it to a crack. The Ferro fluid shall be a ferromagnetic material and the particles should be in sub micron or nanometer region. These particles shall be mixed in suitable surfactants to get a uniformly monodispersed emulsion. This emulsion is to be applied on the test substrate and then the flux generated due to the emulsion shall be first measured. This measured flux density shall be taken as the baseline. Any deviation from the baseline shall be considered as flux leakage. It is possible to differentiate between the signals received from a crack and corrosion. One of the advantages of the present set up using Ferrous Fluid Sensor (FFS) for the generation and detection of signals can be easily processed by wireless application. The signal sensed by the FFS is transmitted to the cockpit through the wireless sensor network for monitoring of crack and corrosion on the surface of the aircraft.
THERMAL PERFORMANCE ANALYSIS ON SOLAR INTEGRATED COLLECTOR STORAGE
Authors: ARUNASALAM ABISHAKE , RAVI ANJAN , SRIVATSA BOMMU , SENTHIL R.
Published: January 2021

The current trend very well signifies that the world is losing all its fossil fuels at a rapid pace. The main solution to get rid of this problem is to effectively make use of the Renewable Energy Sources available around us. Solar energy is one such renewable source of energy available and is encouraged to be used in every country for its sustainability. However, the energy source and the demand do not match each other, especially in solar heating applications. So at present, energy storage is the main focus in any solar heating and cooling system. Solar radiation is a time dependent energy source with an intermittent character. The main aim of this work is to analyze the charging and discharging performance of solar thermal energy storage system with phase change materials (PCMs) and to investigate the appropriate method of enhancement of heat transfer from fin to PCM and PCM to heat transfer fluid (HTF). The utilization of PCM in the heat storage is investigated experimentally for convective heat transfer between the PCM and air. The selected PCM, Magnesium Chloride hexahydrate worked well in the practical range of temperature of around 110C for a variety of domestic and industrial applications.
POLYVINYLIDENE FLUORIDE AND ZINC OXIDE SMART COMPOSITE MATERIAL
Authors: SAWALE S.S. , SAWALE P.S.
Published: January 2021

This work aimed at fabrication and electromechanical characterization of a smart material system composed of electroactive polymer and ceramic materials. The idea of composite material system is on account of complementary characteristics of the polymer and ceramic for flexibility and piezoelectric activity. Our preliminary work included Polyvinylidene Fluoride (PVDF) as the flexible piezoelectric polymer, and Zinc Oxide (ZnO) as the piezoelectric ceramic brittle, but capable to respond strains without poling. Two alternative processes were investigated. The first process makes use of ZnO fibrous formation achieved by sintering PVA/zinc acetate precursor fibers via electrospinning. Highly brittle fibrous ZnO mat was dipped into a PVDF polymer solution and then pressed to form pellets. The second process employed commercial ZnO nanopowder material. The powder was mixed into a PVDF/acetone polymer solution, and the resultant paste was pressed to form pellets. The free standing composite pellets with electrodes on the top and bottom surfaces were then subjected to sinusoidal electric excitation and response was recorded using a fotonic sensor. An earlier work on electrospun PVDF fiber mats was also summarized here and the electromechanical characterization is reported.
METACOGNITION REVEALED COMPUTATIONALLY
Authors: SWAIN RAMAKRUSHNA , KAMILA NARENDRA KUMAR
Published: January 2021

This paper focuses on current progress for the understanding of human cognition. Here different models have been considered such as MLP, FLANN, PNN, MLR, and HSN for recognition of one of the state of mind. It is argued that in addition to other models, PSO occupies a prominent place in the future of cognitive science, and that cognitive scientists should play an active role in the process. Baysian Approach in the same context has also discussed. The special case of predicting harm doing in a particular mental state has been experimented taking different models into account in depicting decision making as a process of probabilistic, knowledge-driven inference.
SPACE VECTOR BASED THREE PHASE GRID CONNECTED PHOTOVOLTAIC SYSTEM
Authors: PRASAD T. NARASIMHA , DEVI V. LAKSHMI
Published: January 2021

Solar energy has become a very potential new energy; Connected directly with grid-connected photovoltaic (PV) systems does not require bulk and lossy battery. Distributed generation and on-site supply of PV system reduces losses of transmission and distribution, and mitigates environment pollution. This paper establishes a Dynamic model of grid-connected PV system by Matlab/Simulink with d-and q-axis as coordinates which is synchronously rotating with the grid voltage to reflect the characteristics of the system accurately. Based on the accurate modeling system, optimum control and fault analysis are studied. The simulation and analysis verify the effectiveness of the proposed algorithm, and demonstrate that the proposed control system has good static performance.
Machine Learning Approach for Smile Detection in Real Time Images
Authors: Yadappanavar Harsha , S Shylaja S
Published: January 2021

Recognizing facial expressions of human beings by a computer is an interesting and challenging problem. A system that performs the operation of face detection and facial feature extraction accurately and in real time would form a big step in achieving a humanlike interaction between man and machine. In this paper, we propose a method for detecting Smile in real time Images by machine learning approach. Machine learning method involves training a classifier and using it in real time images to determine smile. Our implemented approach has been tested on several Images from different databases and the achieved results were found to be very satisfactory.
REAL-TIME VIDEO WATERMARKING FOR COPYRIGHT PROTECTION BASED ON HUMAN PERCEPTION
Authors: PRIYANKA B.SUMANA , SAGAR N.
Published: January 2021

There is a need for real-time copyright logo insertion in emerging applications, such as Internet protocol television (IPTV). This situation arises in IP-TV and digital TV broadcasting when video residing in a server has to be broadcast by different stations and under different broadcasting rights. Embedded systems that are involved in broadcasting need to have embedded copyright protection. Existing works are targeted towards invisible watermarking, not useful for logo insertion. MPEG-4 is the mainstream exchangeable video format in the Internet today because it has higher and flexible compression rate, lower bit rate, and higher efficiency while superior visual quality.The main steps for MPEG-4 are color space conversion and sampling, DCT and its inverse (IDCT), quantization, zigzag scanning, motion estimation, and entropy coding. In this work a watermarking algorithm that performs the broadcaster's logo insertion as watermark in the DCT domain is been presented. The robustness of DCT watermarking arises from the fact that if an attack tries to remove watermarking at mid frequencies, it will risk degrading the fidelity of the image\video because some perceptive details are at mid frequencies. The suggested methods has implemented in matlab.
FACE RECOGNITION IN EIGEN DOMAIN WITH NEURO-FUZZY CLASSIFIER AND EVOLUTIONARY OPTIMIZATION
Authors: S PRASANTH.R. , R SARITHA.
Published: January 2021

Face Recognition is a nascent field of research with many challenges. The proposed system focuses on recognizing faces in a faster and more accurate way using eigenface approach and genetic algorithm by considering the entire problem as an optimization problem. It consists of two stages: Eigenface approach is used for feature extraction and genetic algorithm based feed forward Neuro-Fuzzy System is used for face recognition. Classification of face images to a particular class is done using an artificial neural network. The training of neural network is done using genetic algorithm, a machine learning approach which optimizes the weights used in the neural network. This is an efficient optimization technique and an evolutionary classification method. The algorithm has been tested on 200 images (20 classes). A recognition score for test lot is calculated by considering almost all the variants of feature extraction. Test results gave a recognition rate of 97.01%.
Saberes ancestrales gastronómicos y turismo cultural de la ciudad de Riobamba, provincia de Chimborazo
Authors: Villalva Michael , Inga Carlos Fernando
Published: January 2021

El artículo científico analiza la diversidad de saberes ancestrales gastronómicos y su aprovechamiento para el fortalecimiento del turismo cultural en la ciudad de Riobamba, para lo cual, se desarrolló una investigación documental partiendo por la revisión de investigaciones etnográficas de los últimos 5 años en la localidad, así como también, 132 artículos científicos que mediante criterios de exhaustividad y pertinencia, permiten el entendimiento teórico de los saberes ancestrales gastronómicos, del mismo modo, mediante el estadígrafo chi cuadrado de Pearson, con base en una investigación descriptiva y correlacional, se ha determinado la influencia de los saberes ancestrales en el turismo cultural, con ello, se determinan los desafíos del patrimonio alimentario, la transculturación alimentaria y los efectos en los sistemas turísticos, promoviendo el diseño de estrategias promocionales en los ámbitos de tradicionalidad, identidad y empoderamiento cultural en la colectividad Riobambeña, dichas estrategias, se convierten en un insumo para la promoción de estos recursos patrimoniales mediante ferias gastronómicas y artesanales, proyectos agrícolas y ganaderos y ferias de emprendimientos gastronómicos en la que entidades y actores tanto públicos como privados deben participar arduamente.
Organizational Culture and Managerial Effectiveness: A Study in Selected Institutions of Higher Learning
Authors: Tyagi Navneesh , Moses D. Baby
Published: January 2021

Purpose- In the area of knowledge, India was the pioneer of this world but now this sector is striving hard to rank itself even in the top 300 educational institutions of the world. An immediate solution to this very problem is through the effectiveness of leaders at managerial positions in these institutions, who have to interact with and motivate their staff and colleagues, communicate with top management and clients and try to achieve their individual as well as organizational goals. Leaders do so with and through people working in their institutions therefore different influential factors contributing to employee's behaviour and attitude need to be explored for obtaining overall leadership and managerial effectiveness.
Organizational culture is one such factor established in the literature that is used to explain staff member's behaviours like job satisfaction, employee turnover intentions, organizational commitment, etc. This study is an earnest the effort to measure the influence of organizational culture on managerial effectiveness of leaders in institutions of higher learning.
Design/methodology/approach- This study uses an exploratory research design. Data
collected via a structured questionnaire was analysed and interpreted through Pearson
correlation and multiple regression analysis.
Findings- Organizational culture has a significantly positive influence on managerial
effectiveness.
Limitations/implications- To obtain more generalised and strong the validity of results,
other parts of the country should also be included with an increased sample size.
Practical implications: Through organizational culture, institutions and its leaders may be able to create a healthier and more productive workplace to enhance overall managerial effectiveness in the institutions.
Originality/value- This research is an original work based on primary data to examine the
influence of organizational culture on managerial effectiveness
Assessing Dutch Fiscal and Debt Sustainability
Authors: Carton Benjamin , Fouejieu Armand
Published: January 2021

Although the Netherlands entered the so-called Great Lockdown with a strong fiscal position, the Dutch fiscal balance is projected to deteriorate by an unprecedented magnitude, largely as a result of necessary fiscal measures deployed to weather the economic impact of the COVID-19 pandemic. This paper performs a stochastic analysis of risks to Dutch fiscal and debt sustainability over the next decade, taking into account alternative recovery scenarios and associated fiscal consolidation paths and also a range of macroeconomic shocks drawn from the historical experience of the Netherlands. The simulations show that even under significant downturn scenarios and assuming an initially less favorable fiscal position due to persistent economic effects of the pandemic, risks to the Dutch fiscal and debt sustainability would remain contained.
Public Debt Dynamics and Intra-Year Exchange Rate Fluctuations
Authors: Acosta Ormaechea Santiago
Published: January 2021

The public sector, in carrying out its operations, often incurs foreign currency denominated liabilities and, as such, is exposed to exchange rate fluctuations that could affect the value of public debt to GDP ratios over time. This paper shows that converting foreign currency denominated flows and stocks into local currency using the average and the end-of-period exchange rates, respectively, as envisaged in public finance manuals, gives rise to an identifiable stock-flow adjustment term—due to intra-year exchange rate fluctuations—that affects public debt accumulation. Importantly, the inclusion of this often-ignored stock-flow adjustment term is critical to accurately project public debt levels and any related indicator that could in turn inform about the risk of debt distress. Using a novel dataset covering 82 countries during 2008–19, the paper shows that this stock flow adjustment term is sizable in countries experiencing large exchange rate depreciations, namely above the 99th percentile of the full sample, reaching 1.2 percent of GDP. Interestingly, the measurement of policy-related concepts such as interest rate-growth differentials and debt stabilizing primary balances are also affected by intra-year exchange rate fluctuations, and in non-negligible ways.
UnFEAR
Authors: Chan-Lau Jorge , Wang Ran
Published: January 2021

We introduce unFEAR, Unsupervised Feature Extraction Clustering, to identify economic crisis regimes. Given labeled crisis and non-crisis episodes and the corresponding features values, unFEAR uses unsupervised representation learning and a novel mode contrastive autoencoder to group episodes into time-invariant non-overlapping clusters, each of which could be identified with a different regime. The likelihood that a country may experience an econmic crisis could be set equal to its cluster crisis frequency. Moreover, unFEAR could serve as a first step towards developing cluster-specific crisis prediction models tailored to each crisis regime.
Utility of Alpha-Fetoprotein-L3 and Golgi Protein 73 for Diagnosis of Hepatocellular Carcinoma
Authors: A. El-Kady Rania , M. El-Naggar Mohammed , A. Abd El-Shakour ehab , H. Bahgat Monir
Published: January 2021

Background: Hepatocellular carcinoma (HCC) is amongst the most common malignant tumors that carries a poor prognosis. Clinically, alpha-fetoprotein (AFP) is the most extensively used serum biomarker for diagnosing HCC. Objectives: The current study was conducted to explore the diagnostic value of serum levels of alpha-fetoprotein-L3 (AFP-L3) and Golgi protein 73 (GP73) regarding HCC, and to determine the diagnostic accuracy of these biomarkers when used individually as well as in combination with AFP. Methodology: Blood samples were collected from 50 patients with HCV-related cirrhosis (25 subjects with HCC and 25 without HCC) recruited from the outpatient clinics of the Specialized Internal Medicine Hospital, Mansoura University, Egypt. Serum concentrations of AFP-L3 and GP73 were evaluated using enzyme-linked immunosorbent assay (ELISA). Diagnostic performance of AFP-L3 and GP73 was determined by receiver operating characteristic (ROC) curve analysis. Results: Overall, the median serum level of AFP-L3 was higher in the HCC group compared to the cirrhotic group (p=0.05). Moreover, a statistically-significant difference was observed between the median serum value of GP73 in HCC patients compared to those with cirrhosis (p < 0.001). The ROC curve analysis showed that the area under the ROC curve (AUROC) values for AFP, AFP-L3 and GP73 were 0.88, 0.67 and 0.83, respectively. Of the 3 biomarkers, GP73 demonstrated the highest sensitivity (88%). The AUROC for AFP and AFP-L3 combination was 0.85, whereas that for AFP and GP73 was 0.90. Conclusion: Our findings indicate that GP73 is more sensitive than AFP and AFP-L3 in diagnosing HCC. Furthermore, the combined determination of GP73 and AFP could improve the diagnostic ability of HCC.
Multi- and Extensive-Drug Resistant Acinetobacter baumannii in ICUs: Risk Factors, Antimicrobial Resistance Profiles and co-harboring of gyrA and parC mutations
Authors: A. Tantawy Enas , M. El-Sayed Hanan , M. Matar Heba , A. El-Azhary Basma
Published: January 2021

Background: Acinetobacter baumannii is a gram-negative organism that is implicated in hospital acquired infections. It confers high resistance to many classes of antibiotics. Objectives: To assess the prevalence of multi and extensive drug-resistant (MDR & XDR) Acinetobacter baumannii, their risk factors, antimicrobial resistance patterns and the presence of gyrA and parC gene mutations of quinolone resistance. Methodology: The study included 106 ICU patients (56 males & 50 females), samples were collected according to sites of infections, Acinetobacter baumannii was identified by morphology, biochemical reactions &API 20NE. Antimicrobial susceptibility testing was performed by disc diffusion method. The E-test was used to detect MIC of Ciprofloxacin & Levofloxacin, then a polymerase chain reaction- restriction fragment length polymorphism was performed to detect the occurence of gyrA and parC gene mutations of Quinolone resistance. Results: Thirty isolates were identified as Acinetobacter baumannii, most of which from respiratory infections (P=0.005) prolonged hospitalization, antibiotic use, urinary catheters & ventilator supports were found to be risk factors of infections. Acinetobacter baumannii isolates showed high resistance to most of the tested antibiotics (29 MDR & 28 XDR). All isolates were resistant to Ciprofloxacin & Levofloxacin with the co-presence of gyrA and parC mutations in all isolates (P<0.001). Conclusions: There is an increased prevalence of MDR & XDR Acinetobacter baumannii among ICU infections. The co-occurrence of gyrA and parC mutations is associated with high resistance to Quinolones.
Crítica Literaria e Histórica Areas infrecuentes en la Producción intelectual de la Mujer Peruana
Authors: Cáceres Sánchez María Leticia
Published: January 2021

El presente trabajo que comenzó por un sondeo bibliográfico de la producción peruana femenina en los últimos ochenta años como paso inicial para una elaboración posterior, me ofreció la oportunidad de descubrir una gama de posibilidades de enfoque como resultado del tratamiento estadístico que debí realizar para clasificar las diversas especializaciones de la escritora peruana. Este material de estudio se prestaba igualmente -por su riqueza y multiplicidad- a un análisis de las aptitudes y preferencias de la mujer peruana en el campo de la cultura humanística y científica hasta llegar, en última instancia, al enjuiciamiento crítico de las obras y al peso de las aportaciones realizadas en los respectivos campos elegidos como quehacer primordial dentro de las letras humanas.
Palma y Torres Caicedo : una amistad literaria
Authors: Holguin Callo Oswaldo
Published: January 2021

José María Torres Caicedo (1830-1889), político, periodista, diplomático, poeta y, crítico colombiano, ejercía al promediar el siglo XIX, en París, un papel único y encomiable: el de propagandista de las nuevas inteligencias hispanoamericanas, no pocas de ellas románticas, surgidas en el vasto campo de las letras. En su carácter de redactor principal de El Correo de Ultramar, importante revista parisiense cuya "parte literaria ilustrada" en español circulaba con profusión en el Nuevo Mundo hispanohablante, se había propuesto la noble tarea de exaltar los valores individuales que la comunidad de pueblos americanos de ancestro ibérico presentaba al mundo como signo de madurez intelectual y, en lo posible, de personalidad propia. En el presente trabajo presentamos dos importantescríticas pioneras, de y a Ricardo Palma, labradas en 1863.
Anthropogenic Reversal of the Natural Ozone Gradient between
Northern and Southern Mid-latitudes
Authors: Parrish David D. , Derwent Richard G. , Turnock Steven T. , O’Connor Fiona M. , Staehelin Johannes , Bauer Susanne E. , Deushi Makoto , Oshima Naga , Tsigaridis Kostas , Wu Tongwen , Zhang Jie
Published: January 2021

Abstract. Our quantitative understanding of natural tropospheric ozone concentrations is limited by the paucity of reliable measurements before the 1980s. We utilize the existing measurements to compare the long-term ozone changes that occurred within the marine boundary layer at northern and southern mid-latitudes. Since 1950 ozone concentrations have increased by a factor of 2.1 ± 0.2 in the northern hemisphere (NH) and are presently larger than in the southern hemisphere (SH), where only a much smaller increase has occurred. These changes are attributed to increased ozone production driven by anthropogenic emissions of photochemical ozone precursors that increased with industrial development. The greater ozone concentrations and increases in the NH are consistent with the predominant location of anthropogenic emission sources in that hemisphere. The available measurements indicate that this interhemispheric gradient was much smaller, and was likely reversed in the natural troposphere with higher concentrations in the SH. Six Earth System Model (ESM) simulations indicate similar total NH increases (1.9 with a standard deviation of 0.3), but they occurred more slowly over a longer time period, and the ESMs do not find higher pre-industrial ozone in the SH. Several uncertainties in the ESMs may cause these model-measurement disagreements: the assumed natural nitrogen oxide emissions may be too large, the relatively greater fraction of ozone injected by stratosphere-troposphere exchange to the NH may be overestimated, ozone surface deposition to ocean and land surfaces may not be accurately simulated, and model treatment of emissions of biogenic hydrocarbons and their photochemistry may not be adequate.
Distributed wind measurements with multiple quadrotor UAVs in the atmospheric boundary layer
Authors: Wetz Tamino , Wildmann Norman , Beyrich Frank
Published: January 2021

Abstract. In this study, a swarm of quadrotor UAVs is presented as a system to measure the spatial distribution of atmospheric boundary layer flow. The big advantage of this approach is, that multiple and flexible measurement points in space can be sampled synchronously. The algorithm to obtain horizontal wind speed and direction is designed for hovering flight phases and is based on the principle of aerodynamic drag and the related quadrotor dynamics. During the FESST@MOL campaign at the Boundary Layer Field Site (Grenzschichtmessfeld, GM) Falkenberg of the Lindenberg Meteorological Observatory - Richard-Aßmann-Observatory (MOL-RAO), 76 calibration and validation flights were performed. The 99 m tower equipped with cup and sonic anemometers at the site is used as the reference for the calibration of the wind measurements. The validation with an independent dataset against the tower anemometers reveals that an average accuracy, regarding the root mean square deviation, of σrms
Borrowing trouble? The impact of a systematic review service on interlibrary loan borrowing in an academic health sciences library
Authors: Jarvis Christy , Gregory Joan Marcotte , Mortensen-Hayes Alison , McFarland Mary
Published: January 2021

Background: With the mandate to review all available literature in the study’s inclusion parameters, systematic review projects are likely to require full-text access to a significant number of articles that are not available in a library’s collection, thereby necessitating ordering content via interlibrary loan (ILL). The aim of this study is to understand what effect a systematic review service has on the copyright royalty fees accompanying ILL requests at an academic health sciences library.Case Presentation: The library created a custom report using ILLiad data to look specifically at 2018 ILL borrowing requests that were known to be part of systematic reviews. This subset of borrowing activity was then analyzed to determine its impact on the library’s copyright royalty expenditures for the year. In 2018, copyright eligible borrowing requests that were known to be part of systematic reviews represented only approximately 5% of total filled requests that involved copyright eligible borrowing. However, these systematic review requests directly or indirectly caused approximately 10% of all the Spencer S. Eccles Library copyright royalty expenditures for 2018 requests.Conclusion: Based on the sample data set, the library’s copyright royalty expenditures did increase, but the overall financial impact was modest.
120th Virtual Annual Meeting and Conference, Medical Library Association, Inc., May 19, 2020, and July 27–August 28, 2020
Authors: Pionke JJ , Aaronson Ellen M.
Published: January 2021

The Medical Library Association (MLA) held its 120th annual meeting and conference virtually May 19, 2020, and July 27–August 28, 2020, due to the coronavirus disease 2019 (COVID-19) pandemic. The meeting was titled the “MLA’20 vConference and Exhibits,” and the theme was “2020 Vision: The Future in Focus.”
Citation bias in otolaryngology systematic reviews
Authors: Vassar Matt , Johnson Austin L. , Sharp Adriana , Wayant Cole
Published: January 2021

Objective: Reproducibility of systemic reviews (SRs) can be hindered by the presence of citation bias. Citation bias may occur when authors of SRs conduct hand-searches of included study reference lists to identify additional studies. Such a practice may lead to exaggerated SR summary effects. The purpose of this paper is to examine the prevalence of hand-searching reference lists in otolaryngology SRs.Methods: The authors searched for systematic reviews published in eight clinical otolaryngology journals using the Cochrane Library and PubMed, with the date parameter of January 1, 2008, to December 31, 2017. Two independent authors worked separately to extract data from each SR for the following elements: whether reference lists were hand-searched, other kinds of supplemental searching, PRISMA adherence, and funding source. Following extraction, the investigators met to review discrepancies and achieve consensus.Results: A total of 539 systemic reviews, 502 from clinical journals and 37 from the Cochrane library, were identified. Of those SRs, 72.4% (390/539) hand-searched reference lists, including 97.3% (36/37) of Cochrane reviews. For 228 (58.5%) of the SRs that hand-searched reference lists, no other supplemental search (e.g., search of trial registries) was conducted.Conclusions: These findings indicate that hand-searching reference lists is a common practice in otolaryngology SRs. Moreover, a majority of studies at risk of citation bias did not attempt to mitigate the bias by conducting additional supplemental searches. The implication is that summary effects in otolaryngology systematic reviews may be biased toward statistically significant findings.