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Background: Physical frailty and impaired executive function of the brain show similar pathophysiology. Both of these factors lead to dysfunction of neuromuscular and abilities in elderly. High-speed power training (HSPT) has been determined to have positive effects on neuromuscular function and gait performance, as well as executive function in the elderly.

Aim: The effectiveness of resistance training in improving cognitive function in older adults is well demonstrated. In particular, unconventional high-speed resistance training can improve muscle power development. In the present study, the effectiveness of 12 weeks of elastic band-based high-speed power training (HSPT) was examined.

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Methods: Participants were randomly assigned into a HSPT group (n = 14, age 75.0 0.9 years), a low-speed strength training (LSST) group (n = 9, age 76.0 1.3 years) and a control group (CON; n = 7, age 78.0 1.0 years). A 1-h exercise program was provided twice a week for 12 weeks for the HSPT and LSST groups, and balance and tone exercises were carried out by the CON group.

This is Coldplay at it's finest. I see the song as a life spun out of control. Whether it's alcohol/drugs or gambling or a problematic relationship, when he's begging "can anybody fly this thing" I hear him asking for help in the situation. I was going through some early stages of drug addiction and coming into my early teen years wondering if anybody "could fly this thing" as in deal with my parents, pass 10th grade and still party. But i had the naivity and youthful confidence to take it on at a high speed. Make sense? it fit that time of my life beautifully, I used to get very high and just sit there with my headphones on full blast. haha. good times

Even though I'm sure this is not the real intent of the song.To me, it feels like my situation.I've never lived anywhere except this same city.In the same area.With my mom.I'm 17.People expect a lot of me.They're really confident that I'm going to make something of myself.But I'm scared.I am stuck between two options.Going to a college in my state for science.Or going to New York for dance.

this song is about a person being in love, but theyre not exactly sure how they feel about it. the "bubble" represents the delicate relationship that could "burst" at any time. even despite uneasy feelings the relationship continues because of trust. much like you trust people not tohurt you by driving at high speeds, the subject trusts that his love wont hurt him

I love this song not only for the lyrics but for the effects also. The base line that guy provides at the end of the song combined with the edgy plane motor like sounds. This song is about how sometimes life moves to fast and u dnt even knw it because ur living in a shell not being open to anything. That's wat "we've been living life inside a bubble means. And where chris says "can any1 fly this thing" is where he's asking if anyone feels the same way he does about how fast life is goin and does anyone know how to deal with it. But the climax or message of the song is in the chorus "confidence in high speed" it means don't take the high speed of life as something bad take as ur doing so well in life that its just passing by every single day

All of my songs in my playlists and radio stations play too fast, as if I am fast forwarding them. Sounds like its skipping but its just playing super fast, the count is going faster than real time. Help! It sucks buttholes!

It plays to fast, not much but a little, enough to make each sound a pitch higher, than normal.. This is only consistig with the use of spotify, everyother sound format and player, replays the song at the correct speed. Only spotify fails.

I'm pretty sure I just experienced the same problem, or I need less coffee. Samual L. Jackson sounded like a 15-year old boy in Black Snake Moan unlike yesterday when I watched the movie. Not cool. After listening to several tracks that all sounded too "bright" I decided to restart Spotify. Suddenly it didn't sound like he was clutching his private parts and the song was good again.

High-efficiency and high-speed photodetectors with broadband responses are playing pivotal roles for wavelength-division multiplexing optical communications. Germanium photodetectors on silicon platforms exhibit potential cost advantage due to the compatibility for monolithic integration with silicon-based electronic circuits for signal amplification and processing. In this article, we report a normal incidence, germanium photodetector enabled by guided-mode resonances in photonic crystal, which successfully resolved the compromise between quantum efficiency, wavelength coverage and bandwidth requirement, a drawback usually faced by conventional photodetectors operating at normal incidence. The resonant photonic crystal structure is designed to support multiple resonances in the target wavelength range. With an intrinsic absorption layer thickness of 350 nm, the device achieved a high external quantum efficiency of 50% at 1550 nm, along with an enhancement around 300% for the entire C-band. Using a mesa diameter of 14 m, the fabricated device exhibited a 3-dB bandwidth of 33 GHz and obtained clear eye diagrams at bit rate up to 56 Gbps. This work provides a promising method to design high-efficiency, high-speed, normal incidence germanium photodetectors for optical interconnect systems.

Therefore, there is a desire to implement normal-incident Ge photodetectors to achieve high speed and high efficiency across the whole C-band. In this article, we present a normal incidence Ge-on-Si PIN photodetector with a 350 nm intrinsic layer, which employs GMRs to enhance the light absorption. A high responsivity of 0.62 A/W is achieved at 1550 nm. In addition, a PhC structure is designed to excite overlapped multiple resonances to broaden the wavelength coverage, leading to EQE around 50% across the whole C-band. With a mesa diameter of 14 m, the fabricated device exhibits a 3-dB bandwidth of 33 GHz and obtains clear eye diagrams at bit rate up to 56 Gbps. These characteristics compare favorably with previous reports, as shown in Supplementary Section V.

The GMRs in PhC have been widely employed in applications including photodetectors [29], [30], [31], [32], low threshold lasers [33] and optical filters [34], [, 35]. Specially, multi-GMRs in PhC have been used to realize wide-band filters. GMR can provide not only an efficient way to channel light from free space to within the PhC slab, but also strong enhancement of the local field [36]. As a result, realizing a normal incident photodetector from a PhC with multiple resonances will lead to enhanced absorption in a wide wavelength range. Another important characteristic of GMR is that strong optical resonances can be achieved in PhC with only a few periods [37], which enables the use of GMRs in small-size photodetectors for high-speed applications.

To understand the role of GMRs in our structure, a simulation is conducted on an infinite two-dimensional PhC using the finite-difference time-domain (FDTD) method with periodic boundary condition. The holes are arranged in the x-y plane, as shown in Figure 2(a). For polarization independence, the hole-array is given the same period in the x and y directions. The period, etching depth and diameter of the holes are optimized to achieve multiple resonant modes spreading across the C-band. The permittivity of Ge used in FDTD simulations is experimentally measured using spectroscopic ellipsometer. When the illumination is a y-polarized plane wave at normal incident, multiple GMRs at the point are excited. Calculated absorption spectra of the resonant PhC and the reference structure with no PhC are shown in Figure 2(b). A strong absorption enhancement is obvious in the wavelength range from 1480 to 1580 nm, with four resonance peaks at 1485, 1521, 1550 and 1574 nm, which are marked as mode I, II, III and IV. The dispersion relation of these four GMRs around point is given in Supplementary Section I. Wide spectral width of these resonances primarily comes from the material absorption of Ge. Figure 2(c) shows the electric/magnetic field intensity distributions of these resonant modes. It is seen that most of the electric/magnetic field is confined in the high index layers of Ge and Si. Consequently, the resonance-mode-trapped photons are gradually absorbed in the Ge layer. More discussion of these four resonant modes is given in Supplementary Sections II and III.

Figure 3(b) and (c) shows the EQEs and the corresponding enhancement of the fabricated PDs with different hole-array periods, respectively. Strongly enhanced EQE is realized in a wide wavelength range. The peak wavelength red-shifts as the PhC period increases with peak EQE enhancement around 350%. Comparing the EQE enhancement results between the devices with period of 520 and 540 nm, we can find that mode IV of the 520-nm-period device coincides with mode II of the 540-nm-period device. However, the EQE enhancement of mode II is higher than that of mode IV. Ignoring the slight difference in PhC period, the reason of this discrepancy in enhancement can only come from the different field distributions of mode II and mode IV. As shown in Figure 2(c), the overlap between the field and the doped regions for mode IV is much larger than that for mode II.

Figure 3(d) shows the measured optical responses of the 14-m-diameter patterned PDs, where the diameter of the circular PhC region is around 7 m. A tapered lensed fiber is used to focus the incident light spot diameter to 6 m. As we can see, the optical responses exhibit similar results as the 30-m-diameter patterned PDs. While the resonance peaks are not that clear as compared with that in Figure 3(b). When the size of effective region decreases, the strength of collective resonance in the PhC decreases as the proportion of light leakage from edges becomes larger and the resonance effect gets weaker [38], [, 39]. Moreover, the smaller incident spot size from the tapered lensed fiber has a worse uniformity than that of the standard single-mode fiber, which also degrades the performance of the multiresonances. Despite the existence of these nonideal effects, around 3 times enhancement of EQE is universally achieved in the wavelength range from 1500 to 1565 nm, covering the whole C-band. Specially, the highest EQE at 1550 nm is 50%. At the same time, the fact that the mesa is small means that the junction capacitance is small, which is critical for high-speed photodetectors. 006ab0faaa