(5,961 - 5,980 of 10,079)
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Title
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MODELING THE INFORMATION CONTENT OF THE LIMIT ORDER BOOK BY BAGGING
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Creator
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Li, Wenyi
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Date
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2018
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Description
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I propose a bagging tree framework to study the information content of the limit order book in U.S. equity market. By measuring the...
Show moreI propose a bagging tree framework to study the information content of the limit order book in U.S. equity market. By measuring the predictability and profitability of the order book data up to 5 levels, I find that the limit orders book is informative. In addition to market orders, limit orders behind the best bid and ask prices also contributes to short-term future price movements. Finally, I design simple strategies to show that this information content can be effectively and consistently translated to economic value. My results may provide important implications for both researchers and market practitioners.
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Title
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The Impact of High-Frequency Trading on the U.S. Equity Market
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Creator
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Pan, Miaomiao
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Date
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2018
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Description
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This dissertation studies the impact of high-frequency trading (HFT) on the U.S equity market. I investigate the trading behavior of high...
Show moreThis dissertation studies the impact of high-frequency trading (HFT) on the U.S equity market. I investigate the trading behavior of high-frequency traders (HFTs) using a massive dataset that contains the NASDAQ ITCH feed messages of all S&P 500 component stocks in year 2012. I identify clusters of extremely high cancellation activity (Blocher et al., 2016) in the order book and use high cancel clusters as a proxy for high-frequency cancellation activity. I examine the change in liquidity measures from one-half second before each cancel cluster starts until after the cancel cluster closes and find that with the presence of high cancel activity, liquidity measures recover to their pre-cluster level faster than in non-cancel clusters. Furthermore, an analysis of 1-minute time intervals finds various HFT proxies to be positively related to liquidity, especially for large-cap stocks and certain sectors. Using the Li criterion (Li et al. 2018), I differentiate trades placed by HFTs versus low-frequency traders (LFTs) and compares the two types of trades under the VAR/VMA framework (Hasbrouck 1991). Evidence shows that HFT trades contribute more to the price discovery process than LFT trades and HFTs impose adverse selection costs on LFTs. This study disambiguates unreliable liquidity and faster price discovery.
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Title
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NANOSTRUCTURED SULFUR COMPOSITE CATHODES FOR LITHIUM-SULFUR BATTERIES
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Creator
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Dunya, Hamza
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Date
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2018
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Description
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Since the high demand for clean and efficient energy is the main motivation in the research of renewable energy, there have been extensive...
Show moreSince the high demand for clean and efficient energy is the main motivation in the research of renewable energy, there have been extensive studies on secondary lithium batteries. As a part of this initiative, lithium-ion batteries (LIBs) were introduced by Sony Corporation in 1991. Currently, LIBs are exclusively used in portable devices, such as laptops and cell phones. In the last decade, LIBs have also been widely used in hybrid electric vehicles (HEVs). However, state of the art has reached its limitation barriers due to high cost and low specific energy density. Lithium-sulfur batteries (LSBs) are considered promising next-generation energy storage systems due to high theoretical specific capacity and specific energy,1675 mAh g-1 and 2500 Wh g-1, respectively. The elemental sulfur as cathode material in LSBs is inexpensive, nontoxic, and abundant on the earth.Although LSBs have many advantages mentioned above, there are many challenges for commercialization of LSBs. The main roadblock is polysulfide shuttle (PSS), which is the migration of discharged lithium polysulfide intermediates from the cathode to the anode, leading to fast capacity fading and low Coulombic efficiency. Other important issues include volume change of sulfur during discharge (~80% expansion) and the insulating nature of sulfur.This dissertation describes two different approaches to achieve a decreased polysulfide shuttle effect for lithium-sulfur batteries; first approach, major focus, is nanostructured dual core-shell sulfur cathode composites and second is to design and synthesize new solvents as the electrolyte additives. For the cathode study, we synthesized two shells in the core-shell design. The inner shell was used as the carbon material (nanospheres and nanorods) to enhance the electrical conductivity of the cathode matrix. The outer shell was polysulfide retention materials (g-C3N4, TiO2, AlF3, and MnO2). g-C3N4, TiO2, and AlF3 coatings were used with hollow carbon nanospheres and MnO2 was coated on the nitrogen-doped hollow carbon nanorods. Significant enhancement in capacity retention was observed for all polysulfide resistant coated materials. g-C3N4-coated composite displayed the highest specific capacity among the materials with hollow nanosphere design. The nitrogen-doped hollow carbon nanorod coated with MnO2 displayed one of the highest initial discharge capacities reported in the literature. For electrolyte study, we designed and synthesized four new fluoroether sulfones as the electrolyte via Michael addition reaction of divinyl sulfone and fluoro alcohols to decrease the dissolution of polysulfides intermediates.
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Title
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Role of Respiratory Enzymes on Growth of Pseudomonas aeruginosa in Luria-Bertani and Artificial Urine Media
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Creator
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Hu, Yuyao
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Date
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2018
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Description
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Pseudomonas aeruginosa is a Gram-negative opportunistic pathogen that causes many hospital-acquired infections. The treatment of P. aeruginosa...
Show morePseudomonas aeruginosa is a Gram-negative opportunistic pathogen that causes many hospital-acquired infections. The treatment of P. aeruginosa infections is difficult due its multiple defense and adaptive mechanisms. One of these mechanisms is the flexibility of its respiratory chain. The human cell respiratory chain is composed of four respiratory enzymes with low mechanistic flexibility. On the other hand, the respiratory chain of P. aeruginosa contains 23 respiratory enzymes that ensure survival under harsh conditions. To elucidate the physiologic role of these respiratory enzymes, our research compared the growth parameters of wild type P. aeruginosa and nine separate respiratory enzyme mutants, in both LB and artificial urine media (AUM). The deletion mutants include the sodium-translocating NADH: quinone oxidoreductase, complex I, succinate dehydrogenase, cytochrome bc1 complex, cytochrome c oxidase and cyanide insensitive terminal oxidase. Our data indicate that the growth curve of the cytochrome bc1 complex knockout mutant showed a significantly lower yield and lower growth rate compared with the wild type in both LB and AUM media. Additionally, the cyanide insensitive terminal oxidase mutant showed a significant lower yield compared with the wild type in LB media growth. These results indicate the important roles of these enzymes in the cell biology of P. aeruginosa.
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Title
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Buckminster Fuller and Evelyn McCermiak (?)
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Date
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1948-1949
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Description
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Photograph of Buckminster Fuller with a student, identified on the rear of the photograph as Evelyn McCermiak (or McCermak). Photographer...
Show morePhotograph of Buckminster Fuller with a student, identified on the rear of the photograph as Evelyn McCermiak (or McCermak). Photographer unknown. Date of photograph is unknown. Date range provided is an estimate based on Fuller's tenure at the Institute of Design.
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Collection
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Institute of Design records, 1937-ca. 1962
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