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https://www.readbyqxmd.com/read/28210096/interactive-data-exploration-with-smart-drill-down
#1
Manas Joglekar, Hector Garcia-Molina, Aditya Parameswaran
We present smart drill-down, an operator for interactively exploring a relational table to discover and summarize "interesting" groups of tuples. Each group of tuples is described by a rule. For instance, the rule (a, b, ⋆, 1000) tells us that there are a thousand tuples with value a in the first column and b in the second column (and any value in the third column). Smart drill-down presents an analyst with a list of rules that together describe interesting aspects of the table. The analyst can tailor the definition of interesting, and can interactively apply smart drill-down on an existing rule to explore that part of the table...
May 2016: Proceedings
https://www.readbyqxmd.com/read/28208497/universality-and-asymptotic-scaling-in-drilling-percolation
#2
Peter Grassberger
We present simulations of a three-dimensional percolation model studied recently by K. J. Schrenk et al. [Phys. Rev. Lett. 116, 055701 (2016)PRLTAO0031-900710.1103/PhysRevLett.116.055701], obtained with a new and more efficient algorithm. They confirm most of their results in spite of larger systems and higher statistics used in the present Rapid Communication, but we also find indications that the results do not yet represent the true asymptotic behavior. The model is obtained by replacing the isotropic holes in ordinary Bernoulli percolation by randomly placed and oriented cylinders, with the constraint that the cylinders are parallel to one of the three coordinate axes...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28208132/an-outbreak-of-acute-hepatitis-caused-by-genotype-ib-hepatitis-a-viruses-contaminating-the-water-supply-in-thailand
#3
Kriangsak Ruchusatsawat, Jongkonnee Wongpiyabovorn, Chonthicha Kawidam, Laddawan Thiemsing, Somchai Sangkitporn, Sayaka Yoshizaki, Masashi Tatsumi, Naokazu Takeda, Koji Ishii
BACKGROUND: In 2000, an outbreak of acute hepatitis A was reported in a province adjacent to Bangkok, Thailand. AIMS: To investigate the cause of the 2000 hepatitis A outbreaks in Thailand using molecular epidemiological analysis. METHODS: Serum and stool specimens were collected from patients who were clinically diagnosed with acute viral hepatitis. Water samples from drinking water and deep-drilled wells were also collected. These specimens were subjected to polymerase chain reaction (PCR) amplification and sequencing of the VP1/2A region of the hepatitis A virus (HAV) genome...
February 17, 2017: Intervirology
https://www.readbyqxmd.com/read/28207597/implant-anchorage-in-the-nasopalatine-canal-for-the-rehabilitation-of-severely-atrophic-maxilla
#4
Pâmela Leticia Dos Santos, Gustavo Henrique Souza Silva, Raquel Damazia da Silva, Fernanda Rayssa Da Silva Pereira, Jéssica Lemos Gulinelli
PURPOSE: This study aimed to describe the clinical case of implant placement in the nasopalatine canal as an aid for atrophic maxilla rehabilitation. CASE REPORT: The surgical procedure was carried out in 2 stages, the first part consisted of a surgery to lift the maxillary sinus membrane associated with the xenogeneic bone placement and the second part consisted of the surgery for the implants placement, both under local anesthesia. A number of seven osseointegrated implants were placed in the maxilla, one was anchored in the nasopalatine canal region after having its neurovascular content emptied by means of the use of drill threads of the implant system...
February 14, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28207578/the-impact-of-a-cochlear-implant-electrode-array-on-the-middle-ear-transfer-function
#5
David Pazen, Andreas Anagiotos, Maike Nünning, Antoniu-Oreste Gostian, Magdalene Ortmann, Dirk Beutner
OBJECTIVES: As a treatment for partial deafness with residual hearing in the lower frequency range, the combined acoustic and electric stimulation of the cochlea has become widespread. Acoustic stimulation is provided by a hearing aid's airborne sound and the electric stimulation by a cochlear implant electrode array, which may be inserted through the round window or a cochleostomy. To take advantage of that concept, it is essential to preserve residual hearing after surgery. Therefore, the intracochlear electrode array should not compromise the middle ear vibration transmission...
February 15, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28207242/surface-casing-pressure-as-an-indicator-of-well-integrity-loss-and-stray-gas-migration-in-the-wattenberg-field-colorado
#6
Greg Lackey, Harihar Rajaram, Owen A Sherwood, Troy L Burke, Joseph N Ryan
The risk of environmental contamination by oil and gas wells depends strongly on the frequency with which they lose integrity. Wells with compromised integrity typically exhibit pressure in their outermost annulus (surface casing pressure, SfCP) due to gas accumulation. SfCP is an easily measured but poorly documented gauge of well integrity. Here, we analyze SfCP data from the Colorado Oil and Gas Conservation Commission database to evaluate the frequency of well integrity loss in the Wattenberg Test Zone (WTZ), within the Wattenberg Field, Colorado...
February 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28205482/trans-metacarpal-screw-fixation-for-extra-articular-proximal-phalangeal-base-fractures
#7
Eichi Itadera, Takahiro Yamazaki
We developed a new internal fixation method for extra-articular fractures at the base of the proximal phalanx using a headless compression screw to achieve rigid fracture fixation through a relatively easy technique. With the metacarpophalangeal joint of the involved finger flexed, a smooth guide-pin is inserted into the intramedullary canal of the proximal phalanx through the metacarpal head and metacarpophalangeal joint. Insertion tunnels are made over the guide-pin using a cannulated drill. Then, a headless cannulated screw is placed into the proximal phalanx...
March 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28205326/an-innovative-method-for-fragment-reattachment-after-complicated-crown-fracture
#8
Riccardo Tonini
: The case of a nineteen-year-old female with atypical fractures to three maxillary incisors (#11 FDI, #8 universal; #21 FDI, #9 universal and #22 FDI, #10 universal) with one showing a complicated crown fracture and pulp exposure is reported. A partial pulpotomy had been carried out immediately after trauma and the patient complained of acute pain on percussion of the left central incisor. Direct restoration with resin-based composite was carried out on the two teeth where fragments were not available (tooth #8 and #10) and root canal treatment with reattachment of fragments and fiber post was carried out on the third (tooth #9)...
February 16, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28197759/minimally-invasive-multi-port-approach-to-the-lateral-skull-base-a-first-in-vitro-evaluation
#9
Igor Stenin, Stefan Hansen, M Nau-Hermes, W El-Hakimi, M Becker, J Bredemann, J Kristin, T Klenzner, J Schipper
PURPOSE: The aim of the study was to validate a minimally invasive, multi-port approach to the internal auditory canal at the lateral skull base on a cadaver specimen. METHODS: Fiducials and a custom baseplate were fixed on a cadaver skull, and a computed tomography image was acquired. Three trajectories from the mastoid surface to the internal auditory canal were computed with a custom planning tool. A self-developed positioning system with a drill guide was attached to the baseplate...
February 14, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28196000/population-statistics-approach-for-safety-assessment-in-robotic-cochlear-implantation
#10
Tom Williamson, Kate Gavaghan, Nicolas Gerber, Stefan Weder, Lukas Anschuetz, Franca Wagner, Christian Weisstanner, Georgios Mantokoudis, Marco Caversaccio, Stefan Weber
HYPOTHESIS: Descriptive statistics with respect to patient anatomy and image guidance accuracy can be used to assess the effectiveness of any system for minimally invasive cochlear implantation, on both an individual patient and wider population level. BACKGROUND: Minimally invasive cochlear implantation involves the drilling of a tunnel from the surface of the mastoid to cochlea, with the trajectory passing through the facial recess. The facial recess anatomy constrains the drilling path and places prohibitive accuracy requirements on the used system...
February 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28192269/anterior-transposition-of-anomalous-tortuous-vertebral-artery-causing-cervical-radiculopathy-a-report-of-2-cases-and-review-of-literature
#11
Doris D Wang, Jan-Karl Burkhardt, Stephen T Magill, Michael T Lawton
BACKGROUND: Cervical radiculopathy secondary to compression from vertebral artery (VA) tortuosity is a rare entity. OBJECTIVE: To describe successful transposition of tortuous VA loops causing cervical radiculopathy through an anterolateral approach. METHODS: Two patients with cervical radiculopathy (first case at C5-6 and second case at C3-4) secondary to anomalous VA loop compression underwent anterolateral approaches to the cervical spine for decompression and VA transposition...
February 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28186873/pre-operative-simulation-of-periacetabular-osteotomy-via-a-three-dimensional-model-constructed-from-salt
#12
Kensuke Fukushima, Naonobu Takahira, Katsufumi Uchiyama, Mitsutoshi Moriya, Masashi Takaso
INTRODUCTION: Periacetabular osteotomy (PAO) is an effective joint-preserving procedure for young adults with developmental dysplasia of the hip. Although PAO provides excellent radiographic and clinical results, it is a technically demanding procedure with a distinct learning curve that requires careful 3D planning and, above all, has a number of potential complications. We therefore developed a pre-operative simulation method for PAO via creation of a new full-scale model. METHODS: The model was prepared from the patient's Digital Imaging and Communications in Medicine (DICOM) formatted data from computed tomography (CT), for construction and assembly using 3D printing technology...
2017: SICOT-J
https://www.readbyqxmd.com/read/28185726/comparison-of-transportal-and-outside-in-techniques-for-posterolateral-femoral-tunnel-drilling-in-double-bundle-acl-reconstruction-three-dimensional-ct-analysis-of-bone-tunnel-geometry
#13
Shunichiro Kambara, Hiroshi Nakayama, Motoi Yamaguchi, Akio Matsumoto, Ken Sasaki, Kaori Kashiwa, Tomoya Iseki, Shinichi Yoshiya
PURPOSE: To comparatively analyze the geometry of the posterolateral femoral (PL) tunnel in double-bundle ACL reconstruction between far anteromedial transportal (TP) and outside-in (OI) drilling techniques based on three-dimensional computed tomography (3DCT) image analysis. METHODS: Forty patients who underwent anatomic double-bundle hamstring ACL reconstruction using the TP (n: 20) or OI (n: 20) method with postoperative CT data available were included in the study...
February 6, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28181707/optimal-parameters-to-avoid-thermal-necrosis-during-bone-drilling-a-finite-element-analysis
#14
Mohamed Mediouni, Daniel R Schlatterer, Amal Khoury, Tobias von Bergen, Sunil H Shetty, Manit Arora, Amit Dhond, Neil Vaughan, Alexander Volosnikov
The drilling bone may potentially cause excessive frictional heat, which can lead to local bone necrosis. This heat generation and local necrosis has been suggested to contribute to the resorption of bone around the placed screws, ending in loss of screw purchase in the bone and inadvertent loosening and/or the bone-implant construct. In vivo studies on this subject have inherent obstacles not the least of which is controlling the variables and real time bone temperature data acquisition. Theoretical models can be generated using computer software and the inclusion of known constants for the mechanical properties of metal and bone...
February 9, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28179920/cbct-assessment-of-root-dentine-removal-by-gates-glidden-drills-and-two-engine-driven-root-preparation-systems
#15
Azade Harandi, Fatemeh Mohammadpour Maleki, Ehsan Moudi, Maryam Ehsani, Soraya Khafri
INTRODUCTION: The aim of this study was to compare the dentine removing efficacy of Gates-Glidden drills with hand files, ProTaper and OneShape single-instrument system using cone-beam computed tomography (CBCT). METHODS AND MATERIALS: A total of 39 extracted bifurcated maxillary first premolars were divided into 3 groups (n=13) and were prepared using either Gates-Glidden drills and hand instruments, ProTaper and OneShape systems. Pre- and post-instrumentation CBCT images were obtained...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28177406/short-term-influence-of-drilling-fluid-on-ciliates-from-activated-sludge-in-sequencing-batch-reactors
#16
Roman Babko, Tatiana Kuzmina, Grzegorz Łagód, Katarzyna Jaromin-Gleń, Yaroslav Danko, Małgorzata Pawłowska, Artur Pawłowski
Spent drilling muds are the liquid residues of rock drilling operations. Due to a high concentration of suspended solids and potentially detrimental chemical properties, they can negatively affect microorganisms participating in wastewater treatment processes. We evaluated the addition of a potassium-polymer drilling fluid (DF) to activated sludge in laboratory sequencing batch reactors (SBRs) for municipal wastewater treatment. Ciliate assemblage, the most dynamic component of eukaryotes in activated sludge, and which is highly sensitive to changes in the system, was evaluated...
January 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28174267/k-isotopes-as-a-tracer-of-seafloor-hydrothermal-alteration
#17
Christopher A Parendo, Stein B Jacobsen, Kun Wang
At ocean spreading ridges, circulation of seawater through rock at elevated temperatures alters the chemical and isotopic composition of oceanic crust. Samples obtained from drilling into ocean floor and from ophiolites have demonstrated that certain isotope systems, such as (18)O/(16)O and (87)Sr/(86)Sr, are systematically modified in hydrothermally altered oceanic crust. Although K is known to be mobile during hydrothermal alteration, there have not yet been any K-isotope analyses of altered oceanic crustal materials...
February 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28173971/the-acceleration-and-deceleration-profiles-of-elite-female-soccer-players-during-competitive-matches
#18
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
OBJECTIVES: The aim of this study was to determine the acceleration (≥2ms(-2)) and deceleration (≤-2ms(-2)) profiles of elite female soccer players during competitive matches. DESIGN: Single cohort, observational study. METHODS: An Optical Player Tracking system was used to determine acceleration (≥2ms(-2)) and deceleration (≤-2ms(-2)) variables for twelve elite female players across seven competitive matches. RESULTS: In total, players performed 423 (±126) accelerations and 430 (±125) decelerations per match...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28171711/useful-of-temporal-bone-prototype-for-drilling-training%C3%A2-a-prospective-study
#19
C Aussedat, F Venail, Y Nguyen, E Lescanne, M Marx, D Bakhos
OBJECTIVES: Dissection of cadaveric temporal bones (TBs) is considered the gold standard for surgical training in otology. For many reasons, access to the anatomic lab and cadaveric TBs is difficult for some facilities. The aim of this prospective and comparative study was to evaluate the usefulness of a physical TB prototype for drilling training in residency. DESIGN: Prospective study. SETTING: Tertiary referral centre. PARTICIPANTS: Thirty-four residents were included...
February 7, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28166171/when-should-we-change-drill-bits-a-mechanical-comparison-of-new-reprocessed-and-damaged-bits
#20
Richard Myers, Hyunchul Kim, Adam H Hsieh, Robert V O'Toole, Marcus F Sciadini
OBJECTIVES: We assessed how reprocessed and damaged drill bits perform relative to new drill bits in terms of drilling force required, heat generated at near and far cortices, and number of usable passes. METHODS: Nine pairs of non-osteoporotic human cadaveric femora were tested using 3 types of 3.2-mm drill bits (new, reprocessed, and damaged) in 3 investigations (force, temperature, and multiple usable passes). Operating room conditions were simulated. Force and temperature data were collected for each type...
February 1, 2017: Journal of Orthopaedic Trauma
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