• Journal of Korean Foot and Ankle Society
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• v.7 no.1
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• pp.131-134
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• 2003

Most interdigital neuroma can be diagnosed clinically. But, diagnostic local injection method, sonography and magnetic resonance image(MRI) have been used as secondary tests for clinical confirmation or surgery. Recently, there have been active discussions on the method of interdigital neuroma diagnosis for which sonography or MRI is used. For finding out the location or the number of interdigital neuroma particularly in non-typical clinical manifestation or surgery, MRIs, which are exellent in tissue contrast, may be quite helpful. This case had an interdigital neuroma showing non-typical manifestation. MRIs were used for clinical diagnostic confirmation and finding out the location and the number of interdigital neuroma. Thus, the validity along with literary consideration is being reported.

• Journal of Korean Foot and Ankle Society
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• v.11 no.2
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• pp.182-186
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• 2007

Purpose: We examined the relationship of interdigital neuroma occurring site and the surrounding structures, including the deep transverse metatarsal ligament (DTML) by cadaver study and clinical results. Materials and Methods: Seventeen fresh frozen cadavers study were done to evaluate the relationship of interdigital neuroma occuring site and the DTML at two phase of the gait cycle with 60 degree of metatarsophalangeal dorsiflexion and with 15 degrees of ankle dorsiflexion. We measured the distance from interdigital nerve bifurcation of the common digital nerve to anterior margin of the DTML and longitudinal length of DTML itself. Clinically, we checked the location of interdigital neuroma and DTML length during surgery in 32 feet. Results: In the second and third web space, the mean distance from bifurcation of the common digital nerve of foot to the anterior margin of DTML was 16.7 mm, 15.1 mm in the mid-stance position, and 15.9 mm. 14.6 mm in heel-off position. Second, Third web space ligament itself length were average 12.8 mm, 10.6 mm. Clinically, all of the cases of interdigital neuroma started at the bifurcation area of the common digital nerve and interdigital neuroma was average 7.5 mm (range; 6-11 mm). Conclusion: Interdigital neuroma were located more distally than DTML in both the mid-stance and heel off stage. The main lesion was located between metatarsal head and metatarsophalangeal joint and more distal than the DTML anterior margin.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.10a
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• pp.218-221
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• 2001

이 논문에서는 800MHz 대역에서의 interdigital 커패시터를 이용한 높은 지향성의 방향성 결합기를 설계하였다. 본 논문에서는 20dB 방향성 결합기 설계에 있어 interdigital 커패시터의 파라미터 W, G, Ge, Lo, Wt에 따른 결합도와 격리도의 변화를 분석하여 최적화 함으로써 30dB이상의 지향성을 얻도록 설계하는 것을 목적으로 하였다.

• Journal of Korean Foot and Ankle Society
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• v.12 no.1
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• pp.106-110
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• 2008

Morton's neuroma has been treated with resection of the enlarged interdigital nerve by most of surgeons, but the numbness after resection could bother the patients. We reported the experiences of the good results after treatment of Morton's neuroma with the decompression of the interdigital nerve. Three patients, 4 feet were diagnosed to Morton's neuroma and taken the surgery, decompression of the interdigital nerve after the conservative treatments. The decompression can be considered first as another choice of treatment for interdigital neuroma before resection of the nerve.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.11a
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• pp.198-199
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• 2005

Conformal mapping based models are given for interdigital capacitors on substrates with a thin superstrate and covering dielectric thin film. This model is useful for a wide range of dielectric constant and layer thickness. Interdigital capacitors with finger numbers n>3 are discussed.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.2
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• pp.95-104
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• 2011

In this paper, the metamaterial transmission line (TL) based on the complementary spiral resonators (CSRs) and interdigital structure is presented for reducing the phase noise of the voltage-controlled oscillator (VCO). The metamaterial TL is realized by adopting the array of the CSRs etched on the ground plane and the interdigital transmission line on the signal plane. The interdigital TL on the signal plane has been used to obtain higher Q value than the conventional TL without the interdigital structure. The resonance properties and inherent saturation of Q value of the proposed metamaterial TL have been analyzed by varying the width of the TL on the signal plane, dimensions of the CSRs, current directions between the CSRs, number of the unit cell-pair of the CSRs, and whether or not there is the interdigital structure in this paper. The phase noise and tuning range of the proposed VCO are -127.50~-125.33 dBc/Hz at 100 kHz and 5.744~5.852 GHz.

• Animal cells and systems
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• v.16 no.4
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• pp.295-301
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• 2012

Interdigital tissue regression is one of the most well-known examples of embryonic programmed cell death, providing the mechanism behind separation of developing digits. Caspases have been shown to play a key part in this process, with activated caspase-3 localized between the developing digits. In caspase-3 knock-out adult mice, however, the digits are completely separated with no webbing. In other mutants with defects in the apoptotic machinery, such as Apaf1 deficient mice, interdigital tissue regression is initially inhibited but the webbing eventually disappears as alternative/additional cell death mechanisms step in. In order to investigate whether a similar temporal effect occurs after loss of caspase-3, we have used an in vitro approach to inhibit caspase-3 at specific times during digit separation. Previous limb explant culture approaches have encountered problems with proper limb development in culture, and thus a modified technique was used. The new approach enables detailed observation of the effects of caspase-3 inhibition on interdigital regression. Using these methods, we show that caspase-3 inhibition caused a delay in the loss of interdigital tissue compared with control explants, similar to that observed in Apaf1 mutant mice. Along with immunohistochemistry, active caspase-3 positive cells of the interdigital vs. digital regions were measured by flow cytometry. Notably, activated caspase-3 in vivo was found not only in the interdigital mesenchyme but also in the TUNEL negative digit region, supporting a role for caspase-3 in nonapoptotic events.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.55 no.1
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• pp.26-30
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• 2006

For the purpose of developing capacitive humidity sensor having interdigital electrodes, interdigital electrode was modeled and simulated to obtain capacitance and sensitivity as a function of geometric parameters like the structural gap and thickness. For the development of ASIC, switched capacitor signal processing circuits for capacitive humidity sensor were designed and simulated by Cadence using $0.25{\mu}m$ CMOS process parameters. The signal processing circuits are composed of amplifier for voltage gain control, and clock generator for sensor driving and switch control. The characteristics of the fabricated sensors are; 1) sensitivity is 9fF/%R.H., 2) temperature coefficient of offset(TCO) is $0.4%R.H./^{\circ}C$, 3) nonlinearity is 1.2%FS, 4) hysteresis is 1.5%FS in humidity range of $3%R.H.{\sim}98%R.H.$. The response time is 50 seconds in adsorption and 70 seconds in desorption. Fabricated process used in this capacitive humidity sensor having interdigital electrode are just as similar as conventional IC process technology. Therefore this can be easily mass produced with low cost, simple circuit and utilized in many applications for both industrial and environmental measurement and control system, such as monitoring system of environment, automobile, displayer, IC process room, and laboratory etc.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.3
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• pp.565-573
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• 2000

In this paper, a interdigital microstrip bandpass filter is designed. A interdigital microstrip bandpass filter has many advantages such as insertion return loss, lower return loss, higher frequency selectivity and smaller in size in comparison with the conventional coupled line filter. A interdigital microstrip bandpass filter consists of quasi TEM-mode strip line resonators between parallel ground plant. Each resonator element is a quarter wavelength long of the center frequency and is short circuited at one end and open circuited at the other end. In the filter design, Ensemble software is used. Experimental results show that the bandwidth of interdigital microstrip bandpass filter is 2.52GHz, insertion loss is -1.8dB and return loss is -17.0dB at 11.20Hz.

• Proceedings of the IEEK Conference
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• 2003.07a
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• pp.338-341
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• 2003

In this paper, we designed and implemented a microstrip directional coupler that has high directivity at 2.14 GHz. To design coupler that has high directivity, we used interdigital capacitors instead of lumped elements. The measured results show the diretivity is higher than 30 dB at 2.14 GHz.