Random Access in Nondelimited Variable-length Record Collections for Parallel Reading with Hadoop

The industry standard Packet CAPture (PCAP) format for storing network packet traces is normally only readable in serial due to its lack of delimiters, indexing, or blocking. This presents a challenge for parallel analysis of large networks, where packet traces can be many gigabytes in size. In this work we present RAPCAP, a novel method for random access into variable-length record collections like PCAP by identifying a record boundary within a small number of bytes of the access point. Unlike related heuristic methods that can limit scalability with a nonzero probability of error, the new method offers a correctness guarantee with a well formed file and does not rely on prior knowledge of the contents. We include a practical implementation of the algorithm with an extension to the Hadoop framework, and a performance comparison to serial ingestion. Finally, we present a number of similar storage types that could utilize a modified version of RAPCAP for random access

Optimal Interventions to Address Drop Foot and Increase Gait Speed in Stroke Populations

Background: The mechanism of stroke or cerebral vascular accident (CVA) is an interruption of blood flow to the brain, which can result in many different neuromuscular impairments including drop foot. There is limited research focusing on comparative interventions for gait improvement in early stroke. Purpose: The purpose of this study was to review the various physical thereapy interventions to benefit patients with drop foot following a single stroke. Methods: A comprehensive systematic search was conducted within the PubMed and ProQuest databases. This study examined papers assessing conventional physical therapy for stroke patients with drop foot who had their 1st stroke and treatment within the 1st year. Results: The study identified five interventions including, kinesiotaping, ankle-foot orthosis with drop foot stimulator, treadmill training with Thera Band, functional electrical stimulationn, and neuromuscular electrical stimulation. Outcome measures (OMs) related to gait speed were assessed to determine effectiveness of treatment. Conclusions: All five interventions were found to be effective in improving gait speed and OMs, such as Berg Balance Scale (BBS), Meter Walk Test(10MWT), Timed Up and Go (TUG), and Fugl-Meyer Assessment Lower Extremity (FMA-LE). These OMs can be correlated towards fall risk. Results are also dependent on compliance and patient preference, not just clinical results.https://soar.usa.edu/casmsummer2020/1008/thumbnail.jp

Project POKE: Developing a STEM Community to Offset Learning Loss Amidst COVID Pandemic Through Aerospace Technologies Project-Based Learning in Hawaii\u27s K-12 Classrooms

Project POKE (Providing an Opportunity for the Keiki in Engineering) is a unique opportunity for middle and high school keiki (‘children’ in Hawaiian) in Hawaii to gain hands-on aerospace experience through interaction with a 1U CubeSat kit. The focus of the project is to build a STEM community based on collaboration and project-based learning to offset learning loss amidst the COVID-19 pandemic. The Project POKE program includes an educator course, CubeSat kit, collaborative digital space, open-ended design challenge, and symposium. Middle and high school teachers concurrently participate in the program’s educator course and meet with their students to teach the provided content. Project POKE builds off of the Artemis CubeSat Kit while adapting the educator course materials to K-12 education. Students are challenged to develop a mission concept to study a problem affecting their community using a CubeSat and present their design concept to STEM professionals at the culminating symposium. The first iteration of the program was completed in the 2021-2022 school year with 14 teachers and over 100 students. Surveyed participants indicated positive sentiment and several learning outcomes upon completing the program. Project POKE creates a diversified STEM community in Hawaii, while demystifying space science and aerospace engineering

Functional cis-regulatory modules encoded by mouse-specific endogenous retrovirus

Cis-regulatory modules contain multiple transcription factor (TF)-binding sites and integrate the effects of each TF to control gene expression in specific cellular contexts. Transposable elements (TEs) are uniquely equipped to deposit their regulatory sequences across a genome, which could also contain cis-regulatory modules that coordinate the control of multiple genes with the same regulatory logic. We provide the first evidence of mouse-specific TEs that encode a module of TF-binding sites in mouse embryonic stem cells (ESCs). The majority (77%) of the individual TEs tested exhibited enhancer activity in mouse ESCs. By mutating individual TF-binding sites within the TE, we identified a module of TF-binding motifs that cooperatively enhanced gene expression. Interestingly, we also observed the same motif module in the in silico constructed ancestral TE that also acted cooperatively to enhance gene expression. Our results suggest that ancestral TE insertions might have brought in cis-regulatory modules into the mouse genome

Cohomology for infinitesimal unipotent algebraic and quantum groups

In this paper we study the structure of cohomology spaces for the Frobenius kernels of unipotent and parabolic algebraic group schemes and of their quantum analogs. Given a simple algebraic group $G$, a parabolic subgroup $P_J$, and its unipotent radical $U_J$, we determine the ring structure of the cohomology ring $H^\bullet((U_J)_1,k)$. We also obtain new results on computing $H^\bullet((P_J)_1,L(\lambda))$ as an $L_J$-module where $L(\lambda)$ is a simple $G$-module with high weight $\lambda$ in the closure of the bottom $p$-alcove. Finally, we provide generalizations of all our results to the quantum situation.Comment: 18 pages. Some proofs streamlined over previous version. Additional details added to some proofs in Section

Second cohomology for finite groups of Lie type

Let $G$ be a simple, simply-connected algebraic group defined over $\mathbb{F}_p$. Given a power $q = p^r$ of $p$, let $G(\mathbb{F}_q) \subset G$ be the subgroup of $\mathbb{F}_q$-rational points. Let $L(\lambda)$ be the simple rational $G$-module of highest weight $\lambda$. In this paper we establish sufficient criteria for the restriction map in second cohomology $H^2(G,L(\lambda)) \rightarrow H^2(G(\mathbb{F}_q),L(\lambda))$ to be an isomorphism. In particular, the restriction map is an isomorphism under very mild conditions on $p$ and $q$ provided $\lambda$ is less than or equal to a fundamental dominant weight. Even when the restriction map is not an isomorphism, we are often able to describe $H^2(G(\mathbb{F}_q),L(\lambda))$ in terms of rational cohomology for $G$. We apply our techniques to compute $H^2(G(\mathbb{F}_q),L(\lambda))$ in a wide range of cases, and obtain new examples of nonzero second cohomology for finite groups of Lie type.Comment: 29 pages, GAP code included as an ancillary file. Rewritten to include the adjoint representation in types An, B2, and Cn. Corrections made to Theorem 3.1.3 and subsequent dependent results in Sections 3-4. Additional minor corrections and improvements also implemente