scholarly journals A Gyroless Algorithm with Multi-Hypothesis Initialization for Projectile Navigation

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7487
Author(s):  
Nabil Jardak ◽  
Ronan Adam ◽  
Sébastien Changey
Keyword(s):  
Inertial Sensors ◽  
Measurement Model ◽  
The Other ◽  
High Rate ◽  
Navigation Solution ◽  
Operating Range ◽  
Navigation Algorithm ◽  
High Acceleration ◽  
Initialization Algorithm ◽  
Gps Observations

Projectiles are subjected to a high acceleration shock at launch (20,000 g and higher) and can spin very fast. Thus, the components of onboard navigation units must therefore withstand such constraints in addition to being inexpensive. This makes only a few inertial sensors suitable for projectiles navigation. Particularly, rate gyroscopes which are gun-hardened and have an appropriate operating range are not widely available. On the other hand, magneto-resistive sensors are inexpensive and can satisfy both gun-hardening and operating range requirements, making them an alternative for angular estimation in guided projectiles. This paper presents a gyroless navigation algorithm for projectiles. The lack of gyroscope is handled by the usage of attitude kinematics computed over past attitude estimates of the filter, coupled with a measurement model based on magnetometer and GPS observations of the attitude. The observability of the attitude when considering non-calibrated magnetometers and its dependency on the initialization is addressed. Then, to cope with the initialization dependency of the filter, we proposed a multi-hypothesis initialization algorithm. In terms of performance, the algorithm is shown to provide a high-rate navigation solution with an interesting performance.

scholarly journals First Report of blaNDM-1 Bearing IncX3 Plasmid in Clinically Isolated ST11 Klebsiella pneumoniae from Pakistan

2021 ◽  
Vol 9 (5) ◽  
pp. 951
Author(s):  
Hazrat Bilal ◽  
Gaojian Zhang ◽  
Tayyab Rehman ◽  
Jianxion Han ◽  
Sabir Khan ◽  
...  
Keyword(s):  
Sequence Type ◽  
The Other ◽  
High Rate ◽  
Antibiotics Resistance ◽  
New Delhi ◽  
Molecular Type ◽  
Plasmid Analysis ◽  
First Time ◽  
Encoding Genes ◽  
Sequence Types

The New Delhi Metallo-β-lactamase (NDM) is among the most threatening forms of carbapenemases produced by K. pneumoniae, well-known to cause severe worldwide infections. The molecular epidemiology of blaNDM-1-harboring K. pneumoniae is not well elucidated in Pakistan. Herein, we aim to determine the antibiotics-resistance profile, genes type, molecular type, and plasmid analysis of 125 clinically isolated K. pneumoniae strains from urine samples during July 2018 to January 2019 in Pakistan. A total of 34 (27.2%) K. pneumoniae isolates were carbapenemases producers, and 23 (18.4%) harbored the blaNDM-1 gene. The other carbapenemases encoding genes, i.e., blaIMP-1 (7.2%), blaVIM-1 (3.2%), and blaOXA-48 (2.4%) were also detected. The Multi Locus Sequence Typing (MLST) results revealed that all blaNDM-1-harboring isolates were ST11. The other sequence types detected were ST1, ST37, and ST105. The cluster analysis of Xbal Pulsed Field Gel Electrophoresis (PFGE) revealed variation amongst the clusters of the identical sequence type isolates. The blaNDM-1 gene in all of the isolates was located on a 45-kb IncX3 plasmid, successfully transconjugated. For the first time, blaNDM-1-bearing IncX3 plasmids were identified from Pakistan, and this might be a new primary vehicle for disseminating blaNDM-1 in Enterobacteriaceae as it has a high rate of transferability.

A Multiregion Model with Capital Accumulation and Endogenous Amenities

2007 ◽  
Vol 39 (9) ◽  
pp. 2248-2270 ◽  
Author(s):  
Wei-Bin Zhang
Keyword(s):  
Capital Accumulation ◽  
Comparative Statics ◽  
The Other ◽  
High Rate ◽  
Unique Equilibrium ◽  
Economic Activities ◽  
Technological Differences ◽  
National Output ◽  
Simulation Results ◽  
Wage Disparities

The author develops a multiregional growth model with endogenous amenity and capital accumulation for any number of regions. The simulation results demonstrate that the national dynamics have a unique equilibrium. Comparative statics analysis shows that, if environmental improvement occurs in the technologically advanced (less advanced) region, the national output rises (falls). As a region improves its technology, the other two regions' aggregated output levels fall—not only in relative, but also in absolute, terms. This implies that if any region has a high rate of technological change and the other regions remain technologically stationary, then economic activities will tend to be concentrated in the technologically advancing region. It is also shown that technological differences appear to play only a small role in accounting for spatial wage disparities and endowments.

Voluntary intake, digestibility and rate of passage of a hay and a silage fed to horses and to cattle

1995 ◽  
Vol 1995 ◽  
pp. 164-164
Author(s):  
B. McLean ◽  
A. Afzalzadeh ◽  
L. Bates ◽  
R.W. Mayes ◽  
F.D.DeB. Hovell
Keyword(s):  
Sugar Beet ◽  
Microbial Degradation ◽  
Poor Quality ◽  
The Other ◽  
Alternative Strategy ◽  
High Rate ◽  
Beet Pulp ◽  
Voluntary Intake ◽  
Hind Gut ◽  
Adequate Nutrient

It is well established that the intake and digestibility of roughages by ruminants is positively correlated with rate of passage (ARC, 1980), presumably to enable as complete a microbial degradation of the poorer roughages as possible. On the other hand hind gut fermenters such as horses have been thought to have adopted the alternative strategy of using a high rate of passage to ‘cream’ off the rapidly degradable material of poor quality roughages so as to maintain adequate nutrient intakes. Surprisingly, there are remarkably few actual comparisons between ruminants and hindgut fermenters in the literature. Traditionally dried roughages (hay) and cereal and ‘by-product concentrates’ have been used as horse feeds (grains, brans sugar beet pulp). Recently there has been more interest in the use of silages with horses (eg Smoulders and Hobiers, 1988). However the information as to the utilisation of silages by horses is limited.

scholarly journals An Investigation into Sub-Critical Choke Flow Performance in High Rate Gas Condensate Wells

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3992
Author(s):  
Nasriani ◽  
Khan ◽  
Graham ◽  
Ndlovu ◽  
Nasriani ◽  
...  
Keyword(s):  
Flow Rate ◽  
Parameter Variation ◽  
Gas Condensate ◽  
The Other ◽  
High Rate ◽  
Production Data ◽  
Empirical Correlations ◽  
New Correlation ◽  
Production Wells ◽  
Data Points

There have been some correlations in the literature to predict the gas and liquid flow rate through wellhead chokes under subcritical flow conditions. The majority of these empirical correlations have been developed based on limited production data sets that were collected from a small number of fields. Therefore, these correlations are valid within the parameter variation ranges of those fields. If such correlations are used elsewhere for the prediction of the subcritical choke flow performance of the other fields, significant errors will occur. Additionally, there are only a few empirical correlations for sub-critical choke flow performance in high rate gas condensate wells. These led the authors to develop a new empirical correlation based on a wider production data set from different gas condensate fields in the world; 234 production data points were collected from a large number of production wells in twenty different gas condensate fields with diverse reservoir conditions and different production histories. A non-linear regression analysis method was applied to their production. The new correlation was validated with a new set of data points from some other production wells to confirm the accuracy of the established correlation. The results show that the new correlation had minimal errors and predicted the gas flow rate more accurately than the other three existing models over a wider range of parameter variation ranges.

FUNGICIDAL CONTROL OF BOTRYTIS CINEREA ON FOUR STRAWBERRY VARIETIES

1968 ◽  
Vol 48 (3) ◽  
pp. 267-272
Author(s):  
C. O. Gourley
Keyword(s):  
Botrytis Cinerea ◽  
Fruit Size ◽  
Gray Mold ◽  
Important Variable ◽  
The Other ◽  
Fruit Rot ◽  
High Rate ◽  
Marketable Yield ◽  
The Mean ◽  
Low Rate

Captan, dichlofluanid at a high and a low rate, thiram, and a mixture of captan and thiram were tested in a field trial to control gray mold fruit rot caused by Botrytis cinerea Pers. on the strawberry varieties Gorella, Midway, Redcoat and Sparkle. The mean marketable yield of the varieties was increased by dichlofluanid (low) and thiram but not by the other treatments over that of non-sprayed plots. Dichlofluanid (high) gave better control of pre-harvest fruit rot than captan. Dichlofluanid (high) significantly reduced mean fruit size. Redcoat yields were higher with the low rate than the high rate of dichlofluanid, but pre-harvest fruit rot control and fruit size did not differ with the two rates. Gorella yields and fruit size were smaller with captan + thiram than with captan or thiram. Thiram reduced fruit size on Midway. The varietal reaction to fungicides suggests that marketable yield is the most important variable in selecting a fungicide for the control of gray mold fruit rot of strawberries.

The Association between Diagnosis of Plantar Fasciitis and Windlass Test Results

2003 ◽  
Vol 24 (3) ◽  
pp. 251-255 ◽  
Author(s):  
Denise De Garceau ◽  
Danielle Dean ◽  
Susan Mais Requejo ◽  
David B. Thordarson
Keyword(s):  
Plantar Fasciitis ◽  
The Other ◽  
High Rate ◽  
Control Group ◽  
Test Results ◽  
Foot Pain ◽  
Positive Test Result ◽  
Pain Group ◽  
Test Result ◽  
Low Rate

Twenty-two patients with plantar fasciitis, 23 patients with other types of foot pain, and 30 patients in a control group were evaluated with the Windlass test performed in a weightbearing and non-weightbearing position. In the non-weightbearing test, the first MP joint was maximally dorsiflexed with the ankle stabilized. The weightbearing test was performed with the toes hanging off the edge of a stool and dorsiflexion of the first MP was performed. Seven of the 22 patients in the plantar fasciitis group had a positive weightbearing Windlass test (31.8%), while only three had a positive test result in a non-weightbearing position (13.6%). None of the patients in the other foot pain group or control group had pain in the weightbearing and non-weightbearing positions. Despite its high rate of specificity, the low rate of sensitivity of the Windlass test may limit its usefulness in the clinical evaluation in patients with plantar fasciitis.

SURFACE DEFORMATION AND EARLY WARNING MAGNITUDE OF 2016 KAIKOURA (NEW ZEALAND) EARTHQUAKE FROM HIGH-RATE GPS OBSERVATIONS

2017 ◽  
Vol 60 (6) ◽  
pp. 602-612
Author(s):  
SONG Chuang ◽  
XU Cai-Jun ◽  
WEN Yang-Mao ◽  
YI Lei ◽  
XU Wen
Keyword(s):  
New Zealand ◽  
Early Warning ◽  
Surface Deformation ◽  
High Rate ◽  
Gps Observations

scholarly journals Feasibility Study of Multi Inertial Measurement Unit

Proceedings ◽  
2019 ◽  
Vol 42 (1) ◽  
pp. 74 ◽  
Author(s):  
Ariel Larey ◽  
Eliel Aknin ◽  
Itzik Klein
Keyword(s):  
Inertial Measurement Unit ◽  
Inertial Sensors ◽  
Low Cost ◽  
Software Tool ◽  
Experimental Results ◽  
Measurement Unit ◽  
Outlier Rejection ◽  
Inertial Measurement ◽  
Navigation Solution ◽  
Sensory Data

An inertial measurement unit (IMU) typically has three accelerometers and three gyroscopes. The output of those inertial sensors is used by an inertial navigation system to calculate the navigation solution–position, velocity and attitude. Since the sensor measurements contain noise, the navigation solution drifts over time. When considering low cost sensors, multiple IMUs can be used to improve the performance of a single unit. In this paper, we describe our designed 32 multi-IMU (MIMU) architecture and present experimental results using this system. To analyze the sensory data, a dedicated software tool, capable of addressing MIMUs inputs, was developed. Using the MIMU hardware and software tool we examined and evaluated the MIMUs for: (1) navigation solution accuracy (2) sensor outlier rejection (3) stationary calibration performance (4) coarse alignment accuracy and (5) the effect of different MIMUs locations in the architecture. Our experimental results show that 32 IMUs obtained better performance than a single IMU for all testcases examined. In addition, we show that performance was improved gradually as the number of IMUs was increased in the architecture.

Dose Dense, High Intensity Therapy in Newly Diagnosed Elderly Patients with Acute Myeloid Leukemia Using Gemtuzumab Ozogamicin (Mylotarg™) and High Dose Cytarabine (HiDAC).

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 4516-4516
Author(s):  
Arati V. Rao ◽  
David A. Rizzieri ◽  
Joseph O. Moore ◽  
Carlos DeCastro ◽  
Amy P. Abernethy ◽  
...  
Keyword(s):  
Acute Myeloid Leukemia ◽  
Elderly Patients ◽  
Myeloid Leukemia ◽  
The Other ◽  
High Rate ◽  
Hematologic Toxicity ◽  
Newly Diagnosed ◽  
Gram Positive ◽  
Dose Dense ◽  
Acute Myeloid

Abstract The failure to overcome drug resistance leads to a high rate of relapse in elderly patients with acute myeloid leukemia. We evaluated, in a Phase I study the feasibility of a dose dense regimen of HiDAC, and MylotargTM therapy for newly diagnosed elderly (≥60 years) patients with AML in terms of toxicity with two cycles of this regimen as the sole induction and consolidation therapy. HiDAC was administered in a dose escalation pattern: 3000mg/m2 intravenously given for 6, and 9 doses, and MylotargTM was administered at a dose of 6mg/m2 intravenously on days 1 and 8 of each cycle. Patients without unacceptable toxicity, defined as failure to recover counts to a minimum of ANC ≥ 500/ μl, platelets ≥ 30K and hematocrit ≥ 25%, received a second cycle of therapy, though not before day 28 following day 1 of induction. In addition, death within the first 30 days of induction (not related to disease progression) and life-threatening non-hematologic toxicity (such as cardiac or pulmonary arrest) was also considered dose-limiting. Patients with persistent disease but at least a 50% decrease in the marrow or peripheral blood blast count, or those with low blood counts and patients achieving CR without platelet recovery (CRp) at the 4–6 week examination received cycle 2 with a de-escalation of the Mylotarg dose (from 6 mg/m2 to 4 mg/m2). All patients received G-CSF 5mcg/kg/day subcutaneously from days 11–14. Eight patients (five male, three female) with a median age of 68 years (range 60–74) were enrolled. In cohort one (6 doses of HiDAC), four of six patients were able to complete both cycles of therapy and two of these have achieved CR. Two of the six patients achieved CRp with persistent thrombocytopenia and thus received a second cycle of chemotherapy off protocol. One patient in this cohort had progressive disease and persistent pancytopenia requiring transfusions and subsequently received chemotherapy using Etoposide and Cyclophosphamide. Five out of six patients are alive and remain disease free. In cohort two (9 doses of HiDAC), two patients have been enrolled thus far. One patient developed neurotoxicity after six doses of HiDAC and thus completed both cycles of therapy with six doses of HiDAC along with protocol dose of MylotargTM. The other patient was able to get all nine doses of HiDAC and both patients have achieved a CR. No unexpected hematologic toxicity was observed. All patients developed grade IV thrombocytopenia requiring platelet transfusions. One patient in cohort one died after developing aspergillus infection and multiorgan failure before he could be evaluated for response. Two patients in cohort one developed uncomplicated gram-positive bacteremia requiring antibiotics. In cohort two, one patient developed neurotoxicity and the other developed uncomplicated gram-positive bacteremia. At the time of submission of this abstract seven out of eight patients are alive with four CR and two CRp. No veno-occlusive disease was seen in these eight patients treated with two cycles of HiDAC and MylotargTM back to back. The high rate of CR and relatively good tolerance of this regimen remains encouraging.

scholarly journals Genomic analysis of coxsackieviruses A1, A19, A22, enteroviruses 113 and 104: viruses representing two clades with distinct tropism within enterovirus C

2013 ◽  
Vol 94 (9) ◽  
pp. 1995-2004 ◽  
Author(s):  
Rafal Tokarz ◽  
Saddef Haq ◽  
Stephen Sameroff ◽  
Stephen R. C. Howie ◽  
W. Ian Lipkin
Keyword(s):  
Phylogenetic Analysis ◽  
Sequence Analysis ◽  
Genomic Analysis ◽  
The Other ◽  
High Rate ◽  
Structural Genes ◽  
Genome Sequences ◽  
Capsid Region ◽  
High Degree ◽  
Degree Of Similarity

Coxsackieviruses (CV) A1, CV-A19 and CV-A22 have historically comprised a distinct phylogenetic clade within Enterovirus (EV) C. Several novel serotypes that are genetically similar to these three viruses have been recently discovered and characterized. Here, we report the coding sequence analysis of two genotypes of a previously uncharacterized serotype EV-C113 from Bangladesh and demonstrate that it is most similar to CV-A22 and EV-C116 within the capsid region. We sequenced novel genotypes of CV-A1, CV-A19 and CV-A22 from Bangladesh and observed a high rate of recombination within this group. We also report genomic analysis of the rarely reported EV-C104 circulating in the Gambia in 2009. All available EV-C104 sequences displayed a high degree of similarity within the structural genes but formed two clusters within the non-structural genes. One cluster included the recently reported EV-C117, suggesting an ancestral recombination between these two serotypes. Phylogenetic analysis of all available complete genome sequences indicated the existence of two subgroups within this distinct Enterovirus C clade: one has been exclusively recovered from gastrointestinal samples, while the other cluster has been implicated in respiratory disease.

Sign in / Sign up

Export Citation Format

Share Document