718 research outputs found
AAS227 - Synthesizing Understanding from Data with yt
No full textThis is a talk I gave at the AAS227 about yt. yt is available at yt-project.org.<div><br></div><div>While I am listed as the author of this talk, the yt community is composed of more than a hundred code contributors and mailing list participants, and we are grateful to their involvement and support.</div><div><br></div><div>Additionally, the yt project is built on other members of the scientific software ecosystem such as Jupyter, NumPy, Cython, h5py and hdf5, Matplotlib, and Sympy.</div
Finding the mitral annular lines from 2D + 1D precordial echocardiogram using graph-search technique.
No full text利用分子診斷來分析Duffy, Yt及Colton血型基因型在台、菲、泰三種族的分佈
No full text[[abstract]]We used a polymerase chain reaction-restriction fragment length polymorphism (PCR.RFLP) method for DNA.based typing of Duffy, Yt and Colton blood groups in Taiwanese, Filipinos and Thais. A total of 200 Taiwanese, 115 Filipinos and 105 Thais were studied. In the Duffy blood group in Taiwanese, 180 cases (90%) were homozygote of Fya, 18 cases (9%) were double heterozygote of Fya and Fyb, and 2 cases (1%) were homozygote 'of Fyb. In Filipinos, 98 cases (85.2%) were homozygote of Fya, 16 cases (14.0%) were double heterozygote ofFya and Fyb and 1 case (0.8%) was homozygote of Fyb. In Thais, 87 cases (82.9%) were homozygote of Fya, 18 cases (17.1%) were double heterozygote of Fya and Fyb, and no case of Fyb was found. These results correlate well with serological phenotype. For the Yt blood group, only YTI was found in Taiwanese. Among Filipinos, 114/115 (99. 1%) was YTI/l and 1/115 (0.9%) was YTI/2. In Thais, 103/105 (98.1%) was YTI/ 1 and 2/105 (1.9%) was YTI/2. For the Colton blood group, the results showed that there was only COB allele in these three populations. Our results provide the first data of the Yt and Colton blood groups in these three populations.[[abstract]]血型的決定，傳統上是利用血清學的方法，但有些血型因其抗體不易獲得，因此無法確定。為了解決此問題，我們利用聚合?鏈鎖反應及核酸限制?切割的方法(PCR-RFLP)來偵測Duffy、Yt及Colton等血型。我們分析了台灣人、菲律賓人及泰國人，結果顯示：90%的台灣人為FyaFya，9%為FyaFyb，而1%為FybFyb；85.2%的菲律賓人為FyaFya，14%為FyaFyb，0.8%為FybFyb；至於泰國人則82.9%為FyaFya，17.1%為FyaFyb。Duffy血型的基因診斷法與血清學診斷法結果相當一致。有關Yt血型方面，台灣人只有YT1的基因型；而菲律賓人中99.1%有YT1/1基因型，1.9%為YT1/2基因型。至於Colton血型，則三個種族均只有Coa的基因型。在本研究中，我們提供了關於Duffy、Yt及Colton血型在台、菲、泰三種族的第一手資料
Correction to: Chemoradiation in elderly patients with glioblastoma from the multiinstitutional GBMmolRPA cohort: is shortcourse radiotherapy enough or is it a matter of selection?
No full textThe name of author Do Hoon Lim was incorrect in the initial online publication. The original article has been corrected
Effect of donepezil on transcranial magnetic stimulation parameters in Alzheimer's disease
Full text linkIntroduction: There is a need for a reliable, noninvasive biomarker for Alzheimer's disease (AD). We assessed whether short-latency afferent inhibition (SAI), a transcranial magnetic stimulation paradigm that assesses cholinergic circuits of the brain, could become such a biomarker.
Methods: Nineteen patients with AD underwent four SAI testing sessions. The timing of their usual donepezil dose was altered to create different cholinergic states for each session. This was compared to the SAI results from 20 healthy subjects.
Results: SAI was not able to distinguish the different cholinergic states assessed in our study. There appeared to be a diurnal variation in cholinergic function in the control group, which was not present in the AD cohort.
Discussion: SAI does not appear to have a role in diagnosis and assessment of AD patients. The loss of diurnal variation, however, warrants further investigation as it may provide further biochemical insights about AD
Nonparametric Learning Rules from Bandit Experiments: The Eyes have it!
Full text linkHow do people learn? We assess, in a distribution-free manner, subjects?learning and choice rules in dynamic two-armed bandit (probabilistic reversal learning) experiments. To aid in identification and estimation, we use auxiliary measures of subjects?beliefs, in the form of their eye-movements during the experiment. Our estimated choice probabilities and learning rules have some distinctive features; notably that subjects tend to update in a non-smooth manner following choices made in accordance with current beliefs. Moreover, the beliefs implied by our nonparametric learning rules are closer to those from a (non-Bayesian) reinforcement learning model, than a Bayesian learning model.
Can Cause and Effect be Distinguised by Simple Regression? ESRI Memorandum Series No. 50 (revised) 1968(?)
Full text linkLet data be (Xt, Yt), t = 1, 2, ..., T. We assume throughout that T is "large". We try to evolve statistical tests for identifying whether X or Y is the cause, the other variable being the effect
Establishing a Web-Based DICOM Teaching File Authoring Tool Using Open-Source Public Software.
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