Abstract:
:A frequency reconfigurable dipole antenna based on a silicon radiator is presented. The silicon radiator is activated with the aid of highly dense solid-state plasma by injecting carriers into the intrinsic region of p-i-n diodes. The fabrication and design guideline of the reconfigurable dipole antenna with this plasma radiator are described. When the plasma radiator is activated or deactivated, the length of the dipole arm changes, which means that the operating frequency of the dipole antenna is reconfigurable. When all the channels in the plasma radiator are activated, the operating frequency is tuned from 6.3 GHz to 4.9 GHz. The measured tunable bandwidth of our fabricated dipole antenna is approximately 31%, which is a practical value in comparison to conventional frequency reconfigurable antennas whose tunable bandwidth is in a range from 20% to 50%. To further support the validity of our results, we provide the well-matched simulation results from an antenna simulation. These results demonstrate that silicon with its commercial technology, which has not attracted attention in comparison to a metal antennas, is a promising tunable material for a frequency reconfigurable antenna. This plasma-based reconfigurable antenna has great potential for use in the dynamic communication environment.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Kim DJ,Jo ES,Cho YK,Hur J,Kim CK,Kim CH,Park B,Kim D,Choi YKdoi
10.1038/s41598-018-33278-1subject
Has Abstractpub_date
2018-10-09 00:00:00pages
14996issue
1issn
2045-2322pii
10.1038/s41598-018-33278-1journal_volume
8pub_type
杂志文章abstract::Cattleyak are interspecific hybrids between cattle and yak, exhibiting the same prominent adaptability as yak and much higher performances than yak. However, male infertility of cattleyak resulted from spermatogenic arrest has greatly restricted their effective utilization in yak breeding. In past decades, much work h...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-18607-0
更新日期:2018-01-12 00:00:00
abstract::The association of seasonal trivalent influenza vaccine (TIV) with increased infection by 2009 pandemic H1N1 (A(H1N1)pdm09) virus, initially observed in Canada, has elicited numerous investigations on the possibility of vaccine-associated enhanced disease, but the potential mechanisms remain largely unresolved. Here, ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep37341
更新日期:2016-11-16 00:00:00
abstract::Bats are an important reservoir for zoonotic viruses. To date, only three RVA strains have been reported in bats in Kenya and China. In the current study we investigated the genetic diversity of RVAs in fecal samples from 87 straw-colored fruit bats living in close contact with humans in Cameroon using viral metagenom...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep34209
更新日期:2016-09-26 00:00:00
abstract::Fatty liver (FL) disease is the most common type of chronic liver disease. We hypothesized that liver's response to the process where large droplets of triglyceride fat accumulate in liver cells is reflected also in gene pathway expression in blood. Peripheral blood genome wide gene expression analysis and ultrasonic ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-28563-y
更新日期:2018-07-09 00:00:00
abstract::We propose a novel method to determine the complex amplitude of each eigenfunction composing a vibrational wavepacket of / molecular ions evolving with a ~10 fs time scale. We find that the two-dimensional spectrogram of the kinetic energy release (KER) of H(+)/D(+) fragments plotted against the time delay of the prob...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep11366
更新日期:2015-06-12 00:00:00
abstract::The Hurst effect plays an important role in many areas such as physics, climate and finance. It describes the anomalous growth of range and constrains the behavior and predictability of these systems. The Hurst effect is frequently taken to be synonymous with Long-Range Dependence (LRD) and is typically assumed to be ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep09068
更新日期:2015-03-13 00:00:00
abstract::The inter-relationship between subtropical western-central Pacific sea surface temperatures (STWCPSST), sea ice concentrations in the Beaufort Sea (SICBS), and the North Atlantic Oscillation (NAO) in summer are investigated over the period 1980-2016. It is shown that the Arctic response to the remote impact of the Pac...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-019-39896-7
更新日期:2019-03-05 00:00:00
abstract::All-inorganic visibly-transparent energy-harvesting clear laminated glass windows are the most practical solution to boosting building-integrated photovoltaics (BIPV) energy outputs significantly while reducing cooling- and heating-related energy consumption in buildings. By incorporating luminophore materials into la...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep06632
更新日期:2014-10-16 00:00:00
abstract::There are more than 2300 genes that are predominantly expressed in mouse testes. The role of hundreds of these genes has been studied in mouse spermatogenesis but still there are many genes whose function is unknown. Gene knockout (KO) strategy in mice is widely used for in vivo study of gene function. The present stu...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-23176-x
更新日期:2018-03-21 00:00:00
abstract::Parental care is widespread in Archosaurs (birds, crocodilians, dinosaurs and pterosaurs), and this group provides a useful model for the evolution of parent-offspring interactions. While offspring signalling has been well-studied in birds, the modulation of parental care in crocodilians remains an open question. Here...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep15547
更新日期:2015-10-23 00:00:00
abstract::Microbial life below the seafloor has changed over geological time, but these changes are often not obvious, as they are not recorded in the sediment. Sulphur (S) isotope values in pyrite extracted from a Plio- to Holocene sequence of the Peru Margin (Ocean Drilling Program, ODP, Site 1229) show a down-core pattern th...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-36943-7
更新日期:2019-01-24 00:00:00
abstract::Copper complexes with potent anti-tumor effect have been extensively developed. Most investigations of their modes of action focused on the biomolecular targets but not the signal transduction between target binding and cell death. We have previously shown that the cytotoxic complex pyridine(2,4-dihydroxybenzaldehyde ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep36868
更新日期:2016-11-14 00:00:00
abstract::The frontal lobes are essential for human volition and goal-directed behavior, yet their function remains unclear. While various models have highlighted working memory, reinforcement learning, and cognitive control as key functions, a single framework for interpreting the range of effects observed in prefrontal cortex...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-21407-9
更新日期:2018-03-01 00:00:00
abstract::Previous results regarding the associations between esophageal squamous-cell carcinoma (ESCC) risk and smoking/alcohol drinking in high-risk areas are inconsistent. We performed a large population-based case-control study from 2010 to 2013 in a high-incidence area of China, and enrolled 1353 ESCC cases and 1961 contro...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-17617-2
更新日期:2017-12-08 00:00:00
abstract::During bipedal walking, modern humans dorsiflex their forefoot at the metatarsophalangeal joints (MTPJs) prior to push off, which tightens the plantar soft tissues to convert the foot into a stiff propulsive lever. Particular features of metatarsal head morphology such as "dorsal doming" are thought to facilitate this...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep30532
更新日期:2016-07-28 00:00:00
abstract::Here we quantify the effects of artisanal fisheries on the ecology of a small cetacean, the Ganges River dolphin (Platanista gangetica gangetica, GRD), in a large river system of Nepal. We examine the size-classes of fisheries' catches, behavioural changes in GRD in response to fishing activities, and diel overlap bet...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-75997-4
更新日期:2020-11-02 00:00:00
abstract::Both heart rate (HR) and brain functioning involve the integrated output of a multitude of regulatory mechanisms, that are not quantified adequately by linear approximations such as means and standard deviations. It was therefore considered whether non-linear measures of HR complexity are more strongly associated with...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep16619
更新日期:2015-11-13 00:00:00
abstract::Automatic release and vertical transferring of silicon/silicon oxide nanowire arrays with a high integrity are demonstrated by an Ag-assisted ammonia etching method. By adding a water steaming step between Ag-assisted HF/H2O2 and ammonia etching to form a SiOx protective layer sheathing Si nanowires, we can tune the c...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep03940
更新日期:2014-02-03 00:00:00
abstract::Circulating tumor cells (CTCs) are important clinical indicators for prognosis and treatment efficacy. However, CTC investigation is hampered by their low number, making the establishment of permanent CTC lines very challenging. We derived and characterized nine CTC lines using blood samples from a patient with metast...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-34365-z
更新日期:2018-10-29 00:00:00
abstract::Cyclophilin A (CyPA), secreted by vascular smooth muscle cells in response to oxidative stress, is important in the pathogenesis of progressive peripheral arterial occlusion disease (PAOD), which is common among chronic kidney disease. We explored the prevalence of PAOD in Taiwan's elderly (≥ 65 years old) population ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep09937
更新日期:2015-04-24 00:00:00
abstract::To assess the correlation between penile hypersensitivity and premature ejaculation (PE), a total of 420 consecutive subjects attending our andrologic clinic for suspected PE were enrolled. The entire cohort was asked to complete the self-report intravaginal ejaculation latency time (IELT) by stopwatch. According to t...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-09155-8
更新日期:2017-09-05 00:00:00
abstract::The current study was conducted to assess the effects of microinjection of different dosages of guide RNA (gRNA)/Cas9 protein on the mutation rate, embryo survival, embryonic development, hatchability and early fry survival in channel catfish, Ictalurus punctatus. Guide RNAs targeting two of the channel catfish immune...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-34738-4
更新日期:2018-11-07 00:00:00
abstract::Despite the increasing number of studies conducted recently to evaluate the association between HPV infections and the risk of prostate cancer, the results remain inconclusive. Furthermore, the prevalence and distribution of overall and individual HPV types worldwide in prostate cancer has not been reported until now....
journal_title:Scientific reports
pub_type: 杂志文章,meta分析
doi:10.1038/srep14667
更新日期:2015-10-06 00:00:00
abstract::Neutrophil gelatinase-associated lipocalin (NGAL, lipocalin 2 or LCN2) is an iron carrier protein whose circulating level is increased by kidney injury, bacterial infection and obesity, but its metabolic consequence remains elusive. To study physiological role of LCN2 in energy homeostasis, we challenged female Lcn2 k...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-15825-4
更新日期:2017-11-14 00:00:00
abstract::A child with Down syndrome, like any other child, may benefit from interacting with memory stimuli, but needs additional support and help. The use of special teaching methods, which add playfulness and use of the computer, can enhance the memory processes of these children. In this work, we present the virtual environ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-60014-5
更新日期:2020-02-21 00:00:00
abstract::We investigated whether maternal metabolic environment affects mesenchymal stromal/stem cells (MSCs) from umbilical cord's Wharton's Jelly (WJ) on a molecular level, and potentially render them unsuitable for clinical use in multiple recipients. In this pilot study on umbilical cords post partum from healthy non-obese...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-017-18034-1
更新日期:2017-12-14 00:00:00
abstract::Magnetic iron oxide nanoparticles (MIONs) have established a niche as a nanomedicine platform for diagnosis and therapy, but they present a challenging surface for ligand functionalization which limits their applications. On the other hand, coating MIONs with another material such as gold to enhance these attachments ...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-018-29711-0
更新日期:2018-08-23 00:00:00
abstract::Hepatitis C virus (HCV) uses components of the very-low-density lipoprotein (VLDL) pathway for assembly/release. We previously reported that hepatocyte nuclear factor 4α (HNF4α) participates in HCV assembly/release through downstream factors those participate in VLDL assembly/secretion. Cell-death-inducing DFFA-like e...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep27778
更新日期:2016-06-10 00:00:00
abstract::We report a small molecule tandem organic photovoltaic (OPV) cell with a high power conversion efficiency (PCE) of 7.27%. This cell contains two subcells with an identical mixed active layer of C70:5 wt%TAPC (1,1-bis-(4-bis(4-methyl-phenyl)-amino-phenyl)-cyclohexane). The performance was dramatically improved by simpl...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/srep23916
更新日期:2016-04-01 00:00:00
abstract::Busulfan (Bu) is an alkylating agent commonly used in preparative regimens for hematologic malignant and non-malignant patients undergoing hematopoietic stem cell transplantation (HSCT). The objective of the present study was to develop an UPLC-MS/MS method for quantification of Bu in human plasma. A total of 55 patie...
journal_title:Scientific reports
pub_type: 杂志文章
doi:10.1038/s41598-020-65919-9
更新日期:2020-06-02 00:00:00