Optimizing Big Data Retrieval and Job Scheduling Using Deep Learning Approaches

Big data analytics in business intelligence do not provide effective data retrieval methods and job scheduling that will cause execution inefficiency and low system throughput.This paper aims to enhance the capability of data retrieval and job scheduling to speed up the operation of big data analytics to overcome inefficiency and low throughput problems.First,integrating stacked sparse autoencoder and Elasticsearch indexing explored fast data searching and distributed indexing,which reduces the search scope of the database and dramatically speeds up data searching.Next,exploiting a deep neural network to predict the approximate execution time of a job gives prioritized job scheduling based on the shortest job first,which reduces the average waiting time of job execution.As a result,the proposed data retrieval approach outperforms the previous method using a deep autoencoder and Solr indexing,significantly improving the speed of data retrieval up to 53%and increasing system throughput by 53%.On the other hand,the proposed job scheduling algorithmdefeats both first-in-first-out andmemory-sensitive heterogeneous early finish time scheduling algorithms,effectively shortening the average waiting time up to 5%and average weighted turnaround time by 19%,respectively.

Isolated gastric variceal bleeding caused by splenic lymphoma-associated splenic vein occlusion

Isolated gastric varices(IGV) can occur in patients with left-sided portal hypertension resulting from splenic vein occlusion caused by thrombosis or stenosis. In left-sided portal hypertension,blood flows retrogradely through the short and posterior gastric veins and the gastroepiploic veins,leading to the formation of an IGV. The most common causes of splenic vein occlusion are pancreatic diseases,such as pancreatic cancer,pancreatitis,or a pseudocyst. However,various other cancers,such as colon,gastric,or renal cancers,have also been known to cause splenic vein occlusion. Our patient presented with a rare case of IGV bleeding induced by splenic lymphoma-associated splenic vein occlusion. Splenectomy,splenic artery embolization,and stenting of the splenic vein are the current treatment choices. Chemotherapy,however,is an alternative effective treatment for splenic vein occlusion caused by chemotherapy-sensitive tumors. Our patient responded well to chemotherapy with a cyclophosphamide,hydroxydaunorubicin,oncovin,and prednisolone regimen,and the splenic vein occlusion resolved after the lymphoma regressed.

Wavefront control of subcycle vortex pulses via carrier-envelope-phase tailoring

The carrier-envelope phase(CEP)of an ultrashort laser pulse is becoming more crucial to specify the temporal characteristic of the pulse's electric field when the pulse duration becomes shorter and attains the subcycle regime;here,the pulse duration of the intensity envelope is shorter than one cycle period of the carrier field oscillation.When this subcycle pulse involves a structured wavefront as is contained in an optical vortex(OV)pulse,the CEP has an impact on not only the temporal but also the spatial characteristics owing to the spatiotemporal coupling in the structured optical pulse.However,the direct observation of the spatial effect of the CEP control has not yet been demonstrated.In this study,we report on the measurement and control of the spatial wavefront of a subcycle OV pulse by adjusting the CEP.To generate subcycle OV pulses,an optical parametric amplifier delivering subcycle Gaussian pulses and a Sagnac interferometer as a mode converter were integrated and provided an adequate spectral adaptability.The pulse duration of the generated OV pulse was 4.7 fs at a carrier wavelength of 1.54μm.To confirm the wavefront control with the alteration of the CEP,we developed a novel f-2f interferometer that exhibited spiral fringes originating from the spatial interference between the subcycle OV pulse and the second harmonic of the subcycle Gaussian pulse producing a parabolic wavefront as a reference;this resulted in the successful observation of the rotation of spiral interference fringes during CEP manipulation.