gebhart/patrepeval huggingface dataset:
Board 64: ROS as an Undergraduate Project-based Learning Enabler (2020)

Abstract Future engineering and science jobs will require a greater degree of speciality and diversity at the same time. In manufacturing and service industries robots will likely play a huge job generator. Self driving cars, trucks, and humanoids will only be the start. Advanced robots have traditionally been taught heavily at the graduate level, but not until recently at the undergraduate level. However, the Robotic Operating System (ROS) is a game changer in this regard. ROS allows programmers and engineers to tackle extremely difficult problems without specific knowledge of some of the components. In this paper we look at a year long study of robotic arm mechanisms using a PBL technique. We detail the learning difficulties encountered when developing a program from scratch as well as some of the successes. As part of our measurement of merit, we provide our materials on the internet and track their usage by others. Details of where and how we obtained our data are also provided. The current project is based on the Kobuki Turtlebot and the Trossen Robotics Arm Pincher. In this PBL we attempt to mount a robotic arm on the Turtlebot to retrieve objects located in remote locations using a previously built map. Then building off other student projects we attempt to extend our Kobuki's capabilities from basic navigation to navigation with a mission and purpose.
Accurate length measurement of multiple cotton fibers (2008)

We present the design and realization of an imaging system intended for use as a reference method for the accurate measurement of cotton fiber length. The prototype system is composed of an off-the-shelf scanner that generates a grayscale image of multiple individualized fibers, followed by customized image processing algorithms that compute the length of each fiber in the image. Although the system requires some degree of separation between the individual fibers at scan time, it is shown to produce highly accurate length measurements that are invariant to fiber orientation, shape, interfiber intersections, and intrafiber crimps and crossovers. Hence, in its present state, the proposed system serves as an excellent reference method for assessing the efficacy of commercially available length measurement systems.
Electric power applications of superconductivity (2004)

The development of superconducting systems for electric power is driven by the promise of improved efficiency, smaller size, and reduced weight as compared to existing technologies and by the possibility of new applications. Superconducting power components can also contribute to improved power quality and increased system reliability. This paper addresses historical developments and technology status of four superconducting power applications: cables, superconducting magnetic energy storage (SMES), fault-current limiters, and transformers. Today, SMES is the only fully functional superconducting system and it has seen only limited use at grid power levels. A few model or demonstration units exist for each of the other three applications. Superconductivity faces several hurdles on the path to widespread use. Perhaps the most important is the need for operating voltages of 100 kV or more. Though progress in this and other areas has been rapid, considerable development is needed before superconducting devices perform reliably in the utility environment. As a result, today, most initial installations are aimed at niche applications and will be installed where space is limited, where power demands are increasing over existing corridors, and/or where initial development costs can be offset by enhanced power grid performance.
Cooperative Exploration of Rough Martian Terrains with the "Scorpion" Legged Robot as an Adjunct to a Rover. (2003)

NASA needs autonomous robotic exploration of difficult (rough and/or steep) scientifically interesting Martian terrains. Concepts involving distributed autonomy for cooperative robotic exploration are key to enabling new scientific objectives in robotic missions. We propose to utilize a legged robot as an adjunct scout to a rover for access to difficult - scientifically interesting - terrains (rocky areas, slopes, cliffs). Our final mission scenario involves the Ames rover platform and Scorpion acting together to explore a steep cliff, with the Scorpion robot rappelling down using the K9 as an anchor as well as mission planner and executive. Cooperation concepts, including wheeled rappelling robots have been proposed before. Now we propose to test the combined advantages of a wheeled vehicle with a legged scout as well as the advantages of merging of high level planning and execution with biologically inspired, behavior based robotics. We propose to use the 8-legged, multifunctional autonomous robot platform Scorpion that is currently capable of: Walking on different terrains (rocks, sand, grass, ...). Perceiving its environment and modifying its behavioral pattern accordingly. These capabilities would be extended to enable the Scorpion to: communicate and cooperate with a partner robot; climb over rocks, rubble piles, and objects with structural features. This will be done in the context of exploration of rough terrains in the neighborhood of the rover, but inaccessible to it, culminating in the added capability of rappelling down a steep cliff for both vertical and horizontal terrain observation.
Antenna Miniaturization Influence on the Performance of Impulse Radio UWB system (2008)

In this paper the effect of antenna miniaturization in a UWB system is presented. Modified small-size printed tapered monopole antennas are designed in different scaling sizes. In order to evaluate the antennas performance and their functionality, the performance of three kinds of UWB systems, correlation detection, energy detection and transmitted reference UWB, is studied in the presence of each antenna in the AWGN channel. The simulation results show that our designed antenna and its miniaturized geometries are suitable for UWB applications.
Review: Bioengineering approach for the repair and regeneration of peripheral nerve (2018)

Complex craniofacial surgeries of damaged tissues have several limitations, which present complications and challenges when trying to replicate facial function and structure. Traditional treatment techniques have shown suitable nerve function regeneration with various drawbacks. As technology continues to advance, new methods have been explored in order to regenerate damaged nerves in an effort to more efficiently and effectively regain original function and structure. This article will summarize recent bioengineering strategies involving biodegradable composite scaffolds, bioactive factors, and external stimuli alone or in combination to support peripheral nerve regeneration. Particular emphasis is made on the contributions of growth factors and electrical stimulation on the regenerative process.
ChemInform Abstract: Formation and Uses of the Dianion Formally Produced by Conjugate Addition of Bis(phenylthio)methyl Dianion to Cyclohex‐2‐en‐1‐one. (1986)

Abstract Durch Reaktion des aus (I) in situ erzeugten Dianions (IV) mit Elektrophilen (H 2 O, PhCHO, MeI) werden die Cyclohexanone (V) erhalten.
Sex-Dependent Differences in Estrogen Regulation of Choline Acetyltransferase Are Altered by Neonatal Treatments* (1986)

We investigated whether estrogenic actions of testosterone during development which mediate the suppression of feminine reproductive behavior and cyclic gonadotropin secretion also contribute to reported sex differences in the induction of choline acetyltransferase (ChAT) after estrogen priming in the diagonal band region of the preoptic area. Newborn female rats received estradiol (E2 females); newborn males received 1,4,6-androstatrien-3,17-dione (ATD), an inhibitor of aromatase (ATD males); and some of both sexes received vehicle treatment (control). In adulthood, feminine sexual behavior (lordosis) was tested after E2 plus progesterone priming. The neonatal treatments reversed the sex-specific response pattern; E2 females were defeminized and displayed minimal lordosis, as did control males, while ATD males showed maximal lordosis, as did control females. E2 was then administered, and ChAT activity was measured in the horizontal and vertical nuclei of the diagonal bands (hDB and vDB, respectively). Controls exhibited the normal sex-specific response to E2. Females showed increased ChAT activity in the hDB and unaltered activity in the vDB: males had unaltered ChAT activity in the hDB and decreased activity in the vDB. In neonatally treated males and females, ChAT activity after E2 administration was not altered from the normal sex-specific pattern in the hDB, i.e. all females showed increased hDB ChAT after E2, and no male responded. In the vDB, groups defeminized in terms of lordosis (E2 females and control males) showed higher ChAT activity in the absence of E2 priming, and E2 treatment decreased vDB ChAT in these groups. In addition, ATD males showed a unique response to E2 in the vDB, namely increased ChAT activity. Although neonatal E2 and ATD treatments did not completely reverse the sex-specific pattern of E2 priming on ChAT activity, the results obtained suggest that a net increase in diagonal band cholinergic function, as indexed by increased ChAT activity after E2 priming, may contribute to the ability of hormones to induce lordosis and/or LH surges.
ChemInform Abstract: Regioselective Lactonization of Unsymmetrical 1,4‐Diols: An Efficient Access to Lactone Lignans. (2011)

Abstract A Ru‐based catalyst system with a fine‐tuned chelating tertiary phosphine‐protic amine ligand is developed, which allows a highly regioselective lactonization of unsymmetrically substituted 1,4‐diols.
Complete and SOS-Mediated Response of <i>Staphylococcus aureus</i> to the Antibiotic Ciprofloxacin (2006)

Staphylococcus aureus infections can be difficult to treat due to both multidrug resistance and the organism's remarkable ability to persist in the host. Persistence and the evolution of resistance may be related to several complex regulatory networks, such as the SOS response, which modifies transcription in response to environmental stress. To understand how S. aureus persists during antibiotic therapy and eventually emerges resistant, we characterized its global transcriptional response to ciprofloxacin. We found that ciprofloxacin induces prophage mobilization as well as significant alterations in metabolism, most notably the up-regulation of the tricarboxylic acid cycle. In addition, we found that ciprofloxacin induces the SOS response, which we show, by comparison of a wild-type strain and a non-SOS-inducible lexA mutant strain, includes the derepression of 16 genes. While the SOS response of S. aureus is much more limited than those of Escherichia coli and Bacillus subtilis, it is similar to that of Pseudomonas aeruginosa and includes RecA, LexA, several hypothetical proteins, and a likely error-prone Y family polymerase whose homologs in other bacteria are required for induced mutation. We also examined induced mutation and found that either the inability to derepress the SOS response or the lack of the LexA-regulated polymerase renders S. aureus unable to evolve antibiotic resistance in vitro in response to UV damage. The data suggest that up-regulation of the tricarboxylic acid cycle and induced mutation facilitate S. aureus persistence and evolution of resistance during antibiotic therapy.
An automatic MR-PET registration algorithm (1996)

We present an algorithm to automatically register magnetic resonance (MR) and positron emission tomography (PET) slices of the human brain. Our algorithm is an integrated approach. We simultaneously segment the brain in both modalities and register the slices. The algorithm does not attempt to remove the skull from the MR image, but rather uses "templates" constructed from PET images to locate the boundary between the brain and the surrounding tissue in the MR images. The PET templates are a sequence of estimates of the boundary of the brain in the PET images.
Radial Reflection Diffraction Tomography Notes (2002)

We are developing the theory behind a new imaging modality which uses a single transducer rotating about its center to launch a field radially outward and collect the backscattered (reflected) field. We use diffraction tomography techniques, based upon a linearized version of the field scattering equation, to form images of the medium surrounding the transducer. As there is one transducer which both transmits the incident field and measures the backscattered field, the operation mode is multimonostatic.
Mapping Linked Genes in Drosophila melanogaster Using Data from the F2 Generation of a Dihybrid Cross (2008)

Research Article| November 01 2008 Mapping Linked Genes in Drosophila melanogaster Using Data from the F2 Generation of a Dihybrid Cross Pamela A. Marshall Pamela A. Marshall Search for other works by this author on: This Site PubMed Google Scholar The American Biology Teacher (2008) 70 (9): 554–556. https://doi.org/10.2307/27669342 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Pamela A. Marshall; Mapping Linked Genes in Drosophila melanogaster Using Data from the F2 Generation of a Dihybrid Cross. The American Biology Teacher 1 November 2008; 70 (9): 554–556. doi: https://doi.org/10.2307/27669342 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentThe American Biology Teacher Search This content is only available via PDF. Copyright National Association of Biology Teachers Article PDF first page preview Close Modal You do not currently have access to this content.
Surface modification with lasers (1990)

Abstract Laser‐induced processing has been widely exploited in the microelectronics industry, to produce deposits with well‐controlled chemical composition, feature size, and morphology. A brief survey of the most commonly used techniques for laser patterning of materials on surfaces is presented. The issues which are key to continued progress in the field of surface modification with lasers are examined, including laser heating of surfaces, the role of mass transport in the kinetics of deposit growth, the study of the surface reactions involved in laserinduced processes, and some aspects of materials properties which are important in surface modification techniques.
Prediction of the pilot‐scale recovery of a recombinant yeast enzyme using integrated models (2001)

This article describes the rapid prediction of recovery process performance for a new recombinant enzyme product on the basis of a broad portfolio of computer models and highly targeted experimentation. A process model for the recombinant system was generated by linking unit operation models in an integrated fashion, with required parameter estimation and physical property determination accomplished using data from scale-down studies. This enabled the generic modeling framework established for processing of a natural enzyme from bakers' yeast to be applied. An experimental study of the same operations at the pilot scale showed that the process model gave a conservative prediction of recombinant enzyme recovery. The model successfully captured interactions leading to a low overall product yield and indicated the need for further study of precipitate breakage in the feed zone of a disc stack centrifuge in order to improve performance. The utility of scale-down units as an aid to fast model generation and the advantage of integrating computer modeling and scale-down studies to accelerate bioprocess development are highlighted.
RADIATION EFFECTS FOR DOWNWARD FLAME SPREAD OVER A THERMALLY THIN FUEL IN A PARTIAL-GRAVITY ENVIRONMENT (2004)

This study explores the effects of radiation on a downward flame spread over a thermally thin solid fuel in a partial-gravity environment. The radiation effect and gravitational field strength (g) are predicted not to influence the ignition delay time. The flame-spread rate reaches a maximum at g = 0.01. At g > 0.01, the flame stretch effect dominates the behaviors of the flame. Radiation heat transfer and oxygen transport control the flame behaviors for g < 0.01. The predicted quenching limit is g = 5 × 10−6, close to the value obtained experimentally elsewhere. Radiation has two simultaneous effects. One is to reduce the flame strength by carrying heat to the ambient. The other one is combined with upstream conduction to enhance the total forward heat transfer rate and thus preheat virgin fuel upstream. The solid fuel temperature is low and some fuel is left over in low gravity due to radiation loss. Energy analyses indicate that the conduction heat flux from the flame () dominates its behaviors. However, radiation gradually competes with as the gravity is reduced.
Balance Impairment Is Associated With Neuromuscular Dysfunction In Breast Cancer Patients With Chemotherapy-induced Peripheral Neuropathy (2015)

HISTORY: A clinically relevant side-effect of chemotherapy in cancer treatment is peripheral neuropathy. Peripheral neuropathy causes balance and gait problems limiting the patient’s daily life. The neuromuscular mechanisms underlying these impairments are poorly understood. PHYSICAL EXAMINATION: This study aimed to assess balance performance of patients with chemotherapy-induced peripheral neuropathy (CIPN) vs. healthy controls (CON) and to determine differences in the underlying neuromuscular mechanisms. DIFFERENTIAL DIAGNOSIS: 20 breast cancer patients with CIPN (PAT) were compared to 16 matched CON: in a cross-sectional study design, center of pressure displacement (COP) and electromyographic (EMG) activity of M. tibialis anterior (TA), soleus (SOL), gastrocnemius (GM), rectus femoris (RF) and biceps femoris (BF) were recorded in a single leg balance task. Co-contraction index (CCI) of TA/SOL, TA/GM and RF/BF was calculated. To evaluate changes in the excitability of spinal reflex circuitry SOL H-reflexes were elicited. TEST AND RESULTS: In PAT, COP displacement was greater than in CON (+12%, p=0.013) and correlated significantly with an increased level of CCI for TA/SOL (+ +33%, p=0.047). Moreover, PAT revealed a prolonged H-reflex latency (+5%, p=0.021) and a decreased H-reflex sensitivity (-71%, p=0.001). FINAL WORKING DIAGNOSIS: CIPN is associated with decreased spinal excitability, prolonged nerve conduction velocity and impaired ability to modulate spinal reflex activity, resulting in an extensively diminished ability to keep postural equilibrium. As a consequence, to compensate for the neuromuscular degradation and secure postural stability, increased simultaneous antagonistic muscle activation is used. TREATMENT AND OUTCOMES: To counteract these postural degradation sensorimotor training could serve as a training modality and thus should be considered when treating CIPN patients to improve their balance.
Gain spectrum of the Ho-doped fiber amplifier (2015)

We demonstrate the efficient amplification of small signals in a spectral range of 2020–2120 nm by an all-fiber Ho-doped amplifier pumped at 1125 nm. A maximum gain of 35.8 dB was achieved at a wavelength of 2050 nm. A gain greater than 30 dB was obtained over the whole range.
Microwave Spectrum, Structure, and Quadrupole Coupling Constants of Spiropentyl Chloride (1966)

The microwave spectra of C5H735Cl and C5H737Cl have been observed and analyzed. If the spiropentane ring is assumed to be in the D2d configuration, with methylene-group parameters similar to cyclopropyl chloride, the following parameters are calculated from the observed moments of inertia: r(CCl)=1.74 Å, r(CC)=1.51 Å, and ∠RCCl=118°. The quadrupole coupling constants in the inertial axis system have been obtained for both isotopic species. For the 35Cl species, the values are χaa=−30.98 MHz, χbb=6.22 MHz, and χcc=24.76 MHz. Evidence is presented which indicates that the chemical bond linking the chlorine to the ring is not axially symmetric and does not lie along the C–Cl internuclear line.
Positive selection of NKT cells by CD1+, CD11c+ non-lymphoid cells residing in the extrathymic organs (1999)

Previously, we found that NK1.1+, TCRα β+ natural killer T (NKT) cells develop in cytokine-supplemented suspension cultures of fetal liver established from normal, but not from β2 microglobulin-deficient [β2m(− / −)] mice, and that recombination-deficient SCID fetal liver can reconstiute NKT cell development in β2m(− / −) fetal liver cultures. We found here that cells of SCID adult liver, bone marrow, spleen and thymus were able to reconstitute NKT cell development in the former culture system with efficiency comparable to normal thymic cells. The reconstitution of NKT cells was also seen in the bone marrow chimeras that had been administered a combination of β2m(− / −) and Rag-2(− / −) bone marrow cells. Development of NKT cells was hampered by depletion of CD11c+ or CD11b+ cells, but not by removal of B220+ or Gr-1+ cells from cultures of normal fetal liver cells. Furthermore CD11c+, CD11b+ and / or CD11c+ CD11b– cells (both populations were CD1-dull positive) enriched from Rag-2-deficient fetal livers and pulsed with α-galactosylceramide, a possible antigen for NKT cells, were shown to reconstitute the NKT cell development in β2m(− / −) fetal liver cultures. Collectively, our findings suggest that non-lymphoid cells, presumably CD11c+, CD11b+ and / or CD11c+, CD11b– dendritic cells, are involved in the mechanism of positive selection of NKT cells in the thymus and extrathymic organs.
History and status of the American black bear in Mississippi (2012)

Historically abundant throughout Mississippi, American black bears (Ursus americanus) have declined due to habitat loss and overharvest. By the early 1900s, the bear population was estimated at <12 individuals, and Mississippi closed black bear hunting in 1932. However, habitat loss continued and by 1980 suitable habitat was estimated at 20% (20,234 km2) of historic levels (101,171 km2) with the decline continuing. Although black bear abundance is currently unknown, a recent increase in occurrence reports and documented reproduction suggests the population may be increasing. There have been 21 reported nuisance complaints since 2006, of which 7 were apiary damage. Additionally, 31 bear mortalities were reported since 1972; 80% were human caused. Government and private organizations have emphasized education on bear ecology and human–bear coexistence, while habitat restoration through land retirement programs (e.g., Conservation Reserve and Wetland Reserve Programs) will improve habitat abundance and suitability for black bears. Black bears are naturally recolonizing Mississippi with current state agency management directed at supporting population reestablishment through habitat conservation and species protection.
Structural study of circulating thymic factor: a peptide isolated from pig serum. II. Amino acid sequence. (1977)

The amino acid sequence of a circulating thymic factor (FTS, facteur thymique sérique) isolated from pig serum has been established as less than Glu-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn-OH. This sequence was obtained by Edman analysis both on the intact peptide and after tryptic digestion. The COOH-terminal residue was identified by carboxypeptidase A digestion. A synthetic peptide was prepared which showed the same biological activities as native pig circulating thymic factor, thus confirming the proposed primary structure.