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Au NPs decorated TiO2 nanotubes array candidate for UV photodetectors

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Progress in Natural Science:Materials International 2017年第6期27卷 641-646页

作者： Suttinart Noothongkaew Jin Kyu Han Young bum Lee Orathai Thumthan Ki-Seok An Department of Physics Faculty of Science Ubon Ratchathani University Thin Film Materials Research Group Korea Research Institute of Chemical Technology

This work reports the Au nanoparticles(NPs) deposited on TiOnanotubes(NTs) which were successfully synthesized by a simple two-step anodization method. This fabrication process is notable for a simple and inexpensive method for obtaining pure TiONTs and Au NPs deposited TiONTs. The prepared samples were characterized by field emission scanning electron microscope(FESEM), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), and I-V curve. We found that the size of Au NPs can be controlled by changing the bias voltage during the deposition. The photodetectors of Au NPs/TiOdevices showed good wavelength selectivity with high photocurrent as compared to pure TiONTs devices. Subsequently, Au NPs deposited on TiONTs at bias voltage of 70 V was potentially used in fabrication of UV photodetector. At this applied voltage, a high density of Au NPs was uniformly deposited on TiONTs. As a result, it enables a high photocurrent and great responsivity in UV region. It is suggested that the Au NPs deposited TiONTs device shows good promise for UV photodetectors with possibility to fine-tune properties in both UV and visible regions and is worthy of further investigation.

关键词： Titanium oxide Gold nanoparticles UV photodetectors

东嘎·洛桑赤列先生与都兰血渭6号墓出土的木牌

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攀登（藏文版） 2024年第2期 86-92页

作者：许新国格桑本夏毛措(译) 青海省文物考古研究所青海省文化厅青海省藏族研究会青海省互联网新闻中心

都兰血渭6号墓位于青藏高原东北方向柴达木盆地东南部的青海省海西蒙古族藏族自治州都兰县热水乡境内,此论文中主要阐述了都兰血渭6号墓出土的木牍的内容和东嘎·洛桑赤列先生对其解释的情况。并将6号墓的墓形与西藏吐蕃王朝时期墓葬坟... 详细信息

都兰血渭6号墓位于青藏高原东北方向柴达木盆地东南部的青海省海西蒙古族藏族自治州都兰县热水乡境内,此论文中主要阐述了都兰血渭6号墓出土的木牍的内容和东嘎·洛桑赤列先生对其解释的情况。并将6号墓的墓形与西藏吐蕃王朝时期墓葬坟土、墓室等形制进行比较和详细的介绍,略述其对吐蕃考古学提出的价值和意义。

关键词：吐蕃王朝时期的墓都兰血渭6号木牍石室墓洞室墓

Block Verification Mechanism Based on Zero-Knowledge Proof in Blockchain

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Computer Systems Science & Engineering 2023年第5期45卷 1805-1819页

作者： Jin Wang Wei Ou Osama Alfarraj Amr Tolba gwang-Jun Kim Yongjun Ren School of Computer&Communication Engineering Changsha University of Science&TechnologyChangsha410004China Department of Computer Science Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia Department of Computer Engineering Chonnam National UniversityGwangju61186Korea School of Computer Science Engineering Research Center of Digital Forensics of Ministry of EducationNanjing University of Information Science&TechnologyNanjing210044China

Since transactions in blockchain are based on public ledger verification,this raises security concerns about privacy *** it will cause the accumulation of data on the chain and resulting in the low efficiency of block verification,when the whole transaction on the chain is *** order to improve the efficiency and privacy protection of block data verification,this paper proposes an efficient block verification mechanism with privacy protection based on zeroknowledge proof(ZKP),which not only protects the privacy of users but also improves the speed of data block *** is no need to put the whole transaction on the chain when verifying block *** just needs to generate the ZKP and root hash with the transaction information,then save them to the smart contract for ***,the ZKP verification in smart contract is carried out to realize the privacy protection of the transaction and efficient verification of the *** the data is validated,the buffer accepts the complete transaction,updates the transaction status in the cloud database,and packages up the ***,the ZKP strengthens the privacy protection ability of blockchain,and the smart contracts save the time cost of block verification.

关键词： Blockchain privacy protection zero-knowledge proof smart contract

Classification of Regular Planar Graphs with Diameter Two

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Acta Mathematica Sinica,English Series 2007年第3期23卷 411-416页

作者： Moo Young SOHN Sang bum Kim Young Soo KWON Rong Quan FENG Mathematics Changwon National University Changwon 641-773 Korea Mathematics Pohang University of Science and Technology Pohang 790-784 Korea LMAM School of Mathematical Sc-iencesPeking University Beijing 100871 P. R. China

In the present paper, the regular planar graphs with diameter two are classified.

关键词： graph regular diameter planar outer planar

DoS Attack Detection Based on Deep Factorization Machine in SDN

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Computer Systems Science & Engineering 2023年第5期45卷 1727-1742页

作者： Jing Wang Xiangyu Lei Qisheng Jiang Osama Alfarraj Amr Tolba gwang-jun Kim School of Computer&Communication Engineering Changsha University of Science&TechnologyChangsha410114China Computer Science Department Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia Department of Computer Engineering Chonnam National UniversityGwangju61186Korea

Software-Defined Network(SDN)decouples the control plane of network devices from the data *** alleviating the problems presented in traditional network architectures,it also brings potential security risks,particularly network Denial-of-Service(DoS)*** many research efforts have been devoted to identifying new features for DoS attack detection,detection methods are less accurate in detecting DoS attacks against client hosts due to the high stealth of such *** solve this problem,a new method of DoS attack detection based on Deep Factorization Machine(DeepFM)is proposed in ***,we select the Growth Rate of Max Matched Packets(GRMMP)in SDN as detection ***,the DeepFM algorithm is used to extract features from flow rules and classify them into dense and discrete features to detect DoS *** training,the model can be used to infer whether SDN is under DoS attacks,and a DeepFM-based detection method for DoS attacks against client host is *** results show that our method can effectively detect DoS attacks in *** with the K-Nearest Neighbor(K-NN),Artificial Neural Network(ANN)models,Support Vector Machine(SVM)and Random Forest models,our proposed method outperforms in accuracy,precision and F1 values.

关键词： Software-defined network denial-of-service attacks deep factorization machine GRMMP

Further antiplasmodial effects of the aqueous extract of cymbopogon citratus stapf (lemon grass) against plasmodium berghei in Swiss albino mice

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Asian Pacific Journal of Tropical Medicine 2008年第3期1卷 7-12页

作者： DV Dapper im Siminialayi OO Ebong Department of Pharmacology Faculty of Basic Medical SciencesCollege of Health SciencesUniversity of Port HarcourtPMB 5323Port HarcourtNigeria Department of Human Physiology and Malaria Research Unit Faculty of Basic Medical SciencesCollege of Health SciencesUniversity of Port HarcourtPMB 5323Port HarcourtNigeria

Lemon grass(Cymbopogon citratus Stapf) is a popular alternative to western medicines for a number of conditions, including fevers,muscle soreness and superficial infections in *** addition to its already reported suppressive effects against *** infection,this study sought to determine its repository and blood schizonticidal activities in established *** infection using Swiss albino mice as *** weighing on average, between 15 and 25g were given 103mg/kg,155mg/kg and 310mg/kg/day of the crude aqueous extract of cymbopogon citratus stapf,in the 4-day test,24-hour Rane test and 72-hour Rane *** effects of these doses of the extract were then compared with chloroquine(5mg/kg/day) and sulphadoxine/pyrimethamine (3mg/kg/day).We report an average percentage suppressive repository activity of 65.8%for the extract at a dose of 310mg/kg and a blood schizonticidal activity that increased from 68.33%in the 24-hour Rane test to 92%in the 72-hour Rane test for the same dose of *** crude aqueous extract of *** stapf thus has significant repository and blood schizonticidal activities against established *** infection in Swiss albino mice compare to that of pyrimethamine and sulphadoxine/pyrimethamine respectively.

关键词： cymbopogon citratus stapf antiplasmodial activity P.berghei

Laparoscopic resection of an adrenal pseudocyst mimicking a retroperitoneal mucinous cystic neoplasm

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World Journal of Gastroenterology 2009年第23期15卷 2923-2926页

作者： bum-Soo Kim Sun-Hyung Joo Sung-Il Choi Jeong-Yoon Song Division of Hepatobiliary Surgery Department of Surgery Kyung Hee University College of Medicine and East-West Neo Medical Center 149 Sangil-dong Gangdong-gu Seoul 134-727 South Korea

Adrenal pseudocysts are rare cystic masses that arise within the adrenal gland and are usually non-functional and asymptomatic. Adrenal pseudocysts consist of a fibrous wall without a cellular lining. We report a patient with a 9 cm, left-sided suprarenal cystic mass who presented with abdominal discomfort of 2 years＇ duration. A 38-year-old woman was referred to our service for evaluation of abdominal discomfort and gastrointestinal symptoms. Routine laboratory tests were within normal limits. An abdominal computed tomography scan showed a 9 cm × 8 cm × 8 cm well-defined cystic lesion displacing the left kidney. Magnetic resonance imaging showed a cystic lesion with low signal intensity on the Tl-weighted image and high signal intensity on the T2-weighted image. A laparoscopic left adrenalectomy was performed to diagnose the lesion. The final pathology showed an adrenal pseudocyst without a cellular lining. The patient had no postoperative complications and she was discharged four days after surgery.

关键词： Adrenal gland Pseudocyst Laparoscopy Adrenalectomy

The effects of methanol extract of cleistopholis patens on the reproductive system of female Wistar rats

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Asian Pacific Journal of Tropical Medicine 2009年第1期2卷 6-12页

作者： Amadi CN Odigie JO Siminialayi im Department of Clinical Pharmacy Faculty of Pharmaceutical SciencesCollege of Health SciencesUniversity of Port HarcourtPMB 5323Port Harcourt Department of Pharmacology College of Health SciencesUniversity of Port HarcourtPMB 5323Port Harcourt

Objective:In Port Harcourt and its environs,extracts of Cleistopholis patens are used by traditional medicine healers for the treatment of menstrual irregularities and other gynaecological *** objective of this study was therefore to determine the effects of orally administered methanol extract of the stem bark of Cleistopholis patens on the reproductive organs of non-pregnant albino(Wistar) ***:3g/kg(low dose) and 6g/kg(high dose) of the extract were administered orally,daily to two different groups of animals,respectively, over a period of 28 days.A third(control) group of animals received distilled water only,orally over the same *** animals from each of the groups were sacrificed on day 8,15 and *** blood samples and reproductive organs respectively were taken from each group of sacrificed animals for hormonal and histopathological ***:Results of the hormonal assay revealed a general increase in the levels of Follicle Stimulating Hormone(FSH),Luteinizing Hormone(LH),progesterone,and *** highest levels were noticed in the animals sacrificed on the 29th day(LH =5.48±0.04 IU/L;FSH =3.80±0.00 IU/ L;Progesterone =7.14±0.15 nmol/L;Estrogen = 0.168±0.002 nmol/L).These increases were statistically significant compared to those of the control animals(LH =2.90±0.00 IU /L;FSH = 1.28±0.02 IU/L; Progesterone = 3.80±0.00 nmol/L;Estrogen = 0.130±0.002 nmol/L;Pime-dependent increase in FSH,LH,progesterone and estrogen *** postulate that these observed effects may have been induced by the phytoestrogens (known to have 1/1 000 th of the efficacy of natural oestrogens) in the *** hormonal and histopathological c

关键词： Methanol extract Cleistopholis Patens Histopathological Hormonal Effects Female Rats

Advances in carbon-based thermoelectric materials for high-performance,flexible thermoelectric devices

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Carbon Energy 2021年第5期3卷 667-708页

作者： Jeong-Seob Yun Seongyun Choi Sang Hyuk im Department of Chemical and Biological Engineering Korea UniversitySeongbuk-guSeoulRepublic of Korea

Waste energy harvesting can contribute to the increase of the efficiency of many industrial processes,which consume energy to produce valuable *** all the wasted energy,heat energy is the most abundant,existing in almost any *** devices have the capability to harvest and convert the thermal energy into electrical power via the Seebeck *** its simple operating principle,thermoelectric devices can be reliable even under the harshest environments,taking advantage of any type of heat *** a result,various inorganic and organic materials are being explored as thermoelectric *** the reported materials,carbon-based materials are promising in terms of commericialization,due to their nontoxic and abundant nature,and solution *** particular,poly(3,4-ethylenedioxythiophene):polystyrene sulfonate(PEDOT:PSS),carbon nanotubes,and graphene are extensively studied as thermoelectric materials owing to their remarkable thermoelectric ***,organic-inorganic hybrid halide perovskites show the potential to be used as future high-performance thermoelectric ***,the progess in carbon materials as thermoelectrics is reviewed in detail,focusing on four base materials(PEDOT:PSS,carbon nanotubes,graphene,and organic-inorganic hybrid halide perovskites).This review illuminates the potential of carbon-based materials in the field of thermoelectrics and their application to next-generation energy devices.

关键词： carbon materials carbon nanotubes graphene halide perovskites PEDOT:PSS thermoelectrics