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Synthesis of Poly(norbornene carboxylic acid) Binders for Silicon Anodes
Anjali Nagapadi Preman,이효철,안석균 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Ring opening metathesis polymerization (ROMP) is well-known to synthesize well-defined polymers with controlled molecular weight and narrow molecular weight distribution. Herein, we investigated the potential of poly(norbornene carboxylic acid) (PNCA) for Si anode binders to alleviate the volume expansion during charge and discharge. A series of PNCA having various molecular weights were synthesized by ROMP with third-generation Grubb’s catalyst. In particular, we examine the electrochemical performance of Si nanoparticle anodes prepared with hydrogenated and non-hydrogenated PNCA binder as compared to conventional poly(acrylic acid) binder. Our study can provide a useful guideline to rationally design polymer binders for Si anodes that can exhibit high capacity and long-term stability.
Energy Efficient and Secure Multipoint Relay Selection in Mobile Ad hoc Networks
( Anjali Anand ),( Rinkle Rani ),( Himanshu Aggarwal ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.4
Nodes in MANETs are battery powered which makes energy an invaluable resource. In OLSR, MPRs are special nodes that are selected by other nodes to relay their data/control traffic which may lead to high energy consumption of MPR nodes. Therefore, employing energy efficient MPR selection mechanism is imperative to ensure prolonged network lifetime. However, misbehaving MPR nodes tend to preserve their energy by dropping packets of other nodes instead of forwarding them. This leads to huge energy loss and performance degradation of existing energy efficient MPR selection schemes. This paper proposes an energy efficient secure MPR selection (ES-MPR) technique that takes into account both energy and security metrics for MPR selection. It introduces the concept of `Composite Eligibility Index` (CEI) to examine the eligibility of a node for being selected as an MPR. CEI is used in conjunction with willingness to provide distinct selection parameters for Flooding and Routing MPRs. Simulation studies reveal the efficiency of ES-MPR in selection of energy efficient secure and stable MPRs, in turn, prolonging the network operational lifetime.
( Anjali Anand ),( Rinkle Rani ),( Himanshu Aggarwal ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.11
A Mobile Ad hoc Network (MANET) consists of mobile nodes which co-operate to forward each other`s packets without the presence of any centralized authority. Due to this lack of centralized monitoring authority, MANETs have become vulnerable to various kinds of routing misbehaviour. Sometimes, nodes exhibit non-cooperating behaviour for conserving their own resources and exploiting others` by relaying their traffic. A node may even drop packets of other nodes in the guise of forwarding them. This paper proposes an efficient Reputation and Collaboration technique through route-request for handling such misbehaving nodes. It lays emphasis not only on direct observation but also considers the opinion of other nodes about misbehaving nodes in the network. Unlike existing schemes which generate separate messages for spreading second-hand information in the network, nodes purvey their opinion through route-request packet. Simulation studies reveal that the proposed scheme significantly improves the network performance by efficiently handling the misbehaving nodes in the network.
Anjali Km Prasad,Ananda MUKHOPADHYAY 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.1
In Darjeeling Terai-Dooars, looper stage of Hyposidra infixaria is often causing heavy damage to tea crop as key pest. Therefore for conducting experiment related to its control, rearing on artificial diet becomes an imperative. H. infixaria showed better survival on modified artificial diet of its congener H. talaca than on tea-leaves used as natural diet. Shorter life-cycle, superior developmental traits, higher fecundity and better food utilization capability indicated suitability of the artificial diet. Activity of midgut amylase, protease and lipase of loopers provided suitable hint for formulating balanced artificial diet that supported its normal growth and development. This first attempt of rearing of the pest species (H. infixaria) through three consecutive generations on artificial diet could be useful in mass production of disease-free specimen for the purpose of research and development activity related to tea plant protection and industrial-level production of bioagents.
Clinical experience of long-term use of dienogest after surgery for ovarian endometrioma
Anjali Chandra,노아미,정경아,유태리,전지현,박소연,이사라,문혜성,정혜원 대한산부인과학회 2018 Obstetrics & Gynecology Science Vol.61 No.1
Objective Endometriosis is a common and recurring gynecologic disease which have afflicting females of reproductive age. We investigated the efficacy of long-term, post-operative use of dienogest for ovarian endometrioma. Methods We studied 203 patients who had undergone laparoscopic or robotic surgery for ovarian endometrioma, and were administrated dienogest 2 mg/day beginning in July of 2013, and continuing. We evaluated side effects of dienogest and ultrasonography was performed every 6 months to detect potential recurrence of endometrioma (2 cm) in these post-surgical patients. Results The follow-up observation periods were 30.2±20.9 months from surgery. The mean age was 34.1±7.2 years old. The mean diameter of pre-operative endometrioma was 5.6±3.0 cm2. One hundred eighty-two (89.7%) women received dienogest continuously for 12.0±7.1 months. Of the subjects, 21 (10.3%) patients discontinued dienogest at 2.4±1.0 months. The most common side effect when dienogest was discontinued was abnormal uterine bleeding. The occurrence rate of vaginal bleeding was 15.8%, a number which did not differ significantly in patients with/without post-operative gonadotropin releasing hormone agonist administration. The other side effects were gastrointestinal trouble including constipation, acne, headache, depression, hot flush, weight gain, and edema. However, no serious adverse events or side effects were documented and recurrent endometriomas were diagnosed in 3 patients (1.5%). Conclusion The data indicates that dienogest was both tolerable and safe for long-term use as prophylaxis in an effort to obviate the recurrence of ovarian endometrioma post-operatively, as well as potential need for surgical re-intervention.