Outcomes of arthroscopic dorsal wrist ganglion excision: a 44-month retrospective comparative study

Amaro Pedro,Cardoso Afonso,Caldeira José,Falcão Pedro,Baptista Carolina 대한정형외과 스포츠의학회 2020 Arthroscopy and Orthopedic Sports Medicine Vol.7 No.2

Background: This study retrospectively compares the clinical outcomes of excision of dorsal cysts of the wrist by open and arthroscopic approaches, considering three variables: recurrence rates, residual pain, and the time required for patients to return to their work activities. Methods: All patients who submitted to open or arthroscopic surgical excision of wrist ganglions between January 2012 and December 2017 were evaluated with a mean follow-up period of 44 months. Preoperative and postoperative pains were evaluated using a visual analogue scale, and functional outcomes were evaluated using the Disabilities of the Arm, Shoulder and Hand (Quick-DASH) questionnaire. Recurrences were confirmed by clinical examination, ultrasound, or magnetic resonance imaging. Results: Our study showed that there are no statistically significant differences between the two surgical techniques regarding the recurrence rate or residual pain. Conclusion: Patients who underwent arthroscopic surgery had a statistically significant early return to work.

Clinical outcomes after a new arthroscopic assisted fixation technique of acute acromioclavicular joint dislocation

Pedro Amaro,Luís Pires,Paulo Rego,Raul Alonso 대한정형외과 스포츠의학회 2022 Arthroscopy and Orthopedic Sports Medicine Vol.9 No.2

Background: Multiple surgical techniques have been described for the treatment of unstable acromioclavicular (AC) dislocation injuries. However, consensus on the most adequate procedure is yet to be established. This study aimed to evaluate the clinical and radiological results of a single cohort of patients treated with an arthroscopically assisted endobutton coracoclavicular (CC) reconstruction and AC suture anchor-button internal brace technique. Methods: A total of 15 patients were evaluated with a minimum follow-up of two years. The clinical evaluation comprised a complete physical examination of both shoulders and an assessment of shoulder function scores. Bilateral anteroposterior stress views were obtained before and at the time of the last follow-up for radiological evaluation. Additionally, the CC distance and AC distance were measured on both sides. Results: On average, 94.8 points and 32.6 points were noted in the constant score and the University of California-Los Angeles shoulder scale, respectively. Regarding the constant score, the contralateral side averaged 96 points. This difference was not statistically significant. The average CC difference was reduced from 13 mm preoperatively to 2 mm postoperatively. The average AC difference was reduced from 16 mm preoperatively to 3.5 mm postoperatively. The mean time to return to sport was 3.6 months, and the mean time to return to professional competition was four months. Conclusion: An arthroscopically assisted endobutton CC reconstruction and AC suture anchor-button internal brace technique with excellent functional results and good radiological outcomes having a low complication rate has been reported by this study.

Mechanical Properties of Alumina Nanofilled Polymeric Composites Cured with DDSA and MNA

Ana M. Amaro,Deesy G. Pinto,Luís Bernardo,Sérgio Lopes,João Rodrigues,Cristina S. Louro 한국섬유공학회 2018 Fibers and polymers Vol.19 No.2

Reinforced concrete is widely used in structures. New materials to replace both the steel and the concrete have been studied in many research centres. One of the possibilities for the reinforcement is the partial or total replacement of the steel bars by new composite materials. Nano composites are very promising, and an investigation line was developed to this end by an interdisciplinary team. On this work, the mechanical properties of epoxy resin nanocomposites (EPNCs) filled with α-Al2O3 nanoparticles (NPs) with irregular shape and approximately 100 nm maximum diameter size was investigated. The variable study was the alumina NPs contents: 1, 3 and 5 wt.%. The NPs were previously pretreated with a silane agent (APTES). Two hardeners, 3-dodec-2-enyloxolane-2,5-dione (DDSA) and 8-methyl-3a,4,7,7a-tetrahydro-4,7-methano-2- benzofuran-1,3-dione (MNA), frequently used in epoxy resin embedding tissues, were used simultaneously for this study. Unlike other hardeners, DDSA does not need curing treatment, constituting a novel application and a saving time-energy during the manufacturing process. Considering the mechanical behaviour, it was observed that the EPNCs filled with 5 wt.% of alumina NPs showed the maximum improvement in flexural modulus, around 14 % when compared to the pristine EP sample. No relevant effect was observed on the flexural strength by adding alumina NPs. Additionally, the maximum increase observed for hardness, and Young’s modulus were about 13 % and 28 %, respectively (the maximum increase was observed at 3 wt.%).

안구운동추적 정보기반 능동적 샘플링을 반영한 시각 하이퍼네트워크 모델

김은솔,김지섭,Karinne Ramirez Amaro,Michael Beetz,장병탁 한국정보과학회 2012 한국정보과학회 학술발표논문집 Vol.39 No.1B

기계 학습에서 입력 데이터의 차원을 줄이는 문제(dimension reduction)는 매우 중요한 문제 중의 하나이다. 입력 변수의 차원이 늘어남에 따라 처리해야하는 연산의 수와 계산 복잡도가 급격히 늘어나기 때문이다. 이를 해결하기 위하여 다수의 기계 학습 알고리즘은 명시적으로 차원을 줄이거나(feature selection), 데이터에 약간의 연산을 가하여 차원이 작은 새로운 입력 데이터를 만든다(feature extraction). 반면 사람이 여러 종류의 고차원 센서 데이터를 입력받아 빠른 시간 안에 정확하게 정보를 처리할 수 있는 가장 큰 이유 중 하나는 실시간으로 판단하여 가장 필요한 정보에 집중하기 때문이다. 본 연구는 사람의 정보 처리 과정을 기계 학습 알고리즘에 반영하여, 집중도를 이용하여 효율적으로 데이터를 처리하는 방법을 제시한다. 이 성질을 시각 하이퍼네트워크 모델에 반영하여, 효율적으로 고차원 입력데이터를 다루는 방법을 제안한다. 실험에서는 시각 하이퍼네트워크를 이용하여 고차원의 이미지 데이터에서 행동을 분류하였다.

Formulations of Beauveria bassiana MABb1 and mesoporous materials for the biological control of Sphenarium purpurascens in maize crops from Puebla, Mexico

Romero-Arenas Omar,Amaro-Leal Luis Josué,Rivera Antonio,Parraguirre-Lezama Conrado,Sánchez-Morales Primo,Villa-Ruano Nemesio 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.3

This investigation reports on the biological control of Sphenarium purpurascens by using different concentrations of conidia from a native strain of Beauveria bassiana (MABb1) isolated in Puebla, Mexico under laboratory and in situ conditions. Formulations containing this native strain combined with two mesoporous materials (diatomaceous earth “D” and zeolite “Z”) were assayed in order to determine their effect on the mortality of the grasshopper. Concentrations of 3.67 × 108 to 10.30 × 108 conidia mL−1 caused a substantial mortality rate in the fourth-instar nymphs and adults of S. purpurascens. The observed mortality was directly proportional to the concentration of conidia. Under controlled conditions, the highest specific death rate K(d−1) was 0.78 for the formulation containing Z + D + MABb1 at 72 h post-infection. The formulations of D + MABb1 and Z + D + MABb1 caused a noticeable decrease in the population of grasshoppers in the experimental plots with statistical significant differences (α < 0.05). Interestingly, an increase in the mortality of S purpurascens occurred in July, August and September 2017 when the highest incidence of the grasshopper was recorded. Remarkably, the treatment based on Z + D + MABb1, produced an improvement in the yields of experimental maize plots (7847.4 ± 0.70 Kg ha−1) in comparison to control plots (4453.9 ± 0.50 Kg ha−1). These favorable consequences are reported for the first time in corn crops from Mexico.

Effect of Hostile Solutions on Composites Laminates Subjected to Low and High Velocity Impact Loads

P.N.B. Reis,A.M. Amaro,M. A. Neto,J.S. Cirne 한국섬유공학회 2019 Fibers and polymers Vol.20 No.1

Composite structures can be exposed to different hostile environments, which cause degradation of their mechanical properties. However, this subject is not completely understood. Therefore, the aim of the present work is to study the low velocity impact and the response at high strain rates of carbon/epoxy laminates, after immersion into hydrochloric acid (HCl) and sodium hydroxide (NaOH). From the experimental tests, it is very clear that exposure to corrosive solutions affects significantly the impact strength, but their effects are strongly dependent of the exposure time. Finally, alkalinesolutions show to be more aggressive.

Preparation of MCA-SiO2 and Its Flame Retardant Effects on Glass Fiber Reinforced Polypropylene

P.N.B. Reis,A.M. Amaro,M. A. Neto,J.S. Cirne 한국섬유공학회 2019 Fibers and polymers Vol.20 No.1

In this work, a new synergistic charring agent of melamine cyanurate-fumed silica (MCA-SiO2) has been synthesized through the facile self-assembly process, where melamine (ME) and cyanuric acid (CA) reacted and deposited on the fumed silica in the aqueous suspension. Then GF-PP/IFR-(MCA-SiO2) composites were prepared by melting blend of GF-PP and IFR containing MCA-SiO2. The general properties of the resulting composites were characterized by Cone calorimeter test (CCT), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR) etc. Results show that the addition of SiO2 could greatly reduced the heat release rate (HRR) of the GF-PP/IFR-MCA composites and improved the flame retardant properties during burning. When the content of SiO2 in MCA-SiO2 was 20 wt%, the flame retardant property of the composites reached the UL-94 V-0 rating, corresponding to a the limiting oxygen index (LOI) of 32.4 %. This enhanced flame retardant property could be attributed to the fact that the fumed silica with low thermal conductivity could prevent the heat exchange, and assist in the formation of compact and dense char during the burning.

ISA 기반 시·공간적 특징 학습을 통한 사람의 요리 동작 인식

이기석(Kisuk Lee),김은솔(Eun-Sol Kim),Karinne Ramirez Amaro,Michael Beetz,장병탁(Byoung-Tak Zhang) 한국정보과학회 2012 한국정보과학회 학술발표논문집 Vol.39 No.2B

Photometric redshifts for the Kilo-Degree Survey : Machine-learning analysis with artificial neural networks

Bilicki, M.,Hoekstra, H.,Brown, M. J. I.,Amaro, V.,Blake, C.,Cavuoti, S.,de Jong, J. T. A.,Georgiou, C.,Hildebrandt, H.,Wolf, C.,Amon, A.,Brescia, M.,Brough, S.,Costa-Duarte, M. V.,Erben, T.,Glazebroo EDP Sciences 2018 Astronomy and astrophysics Vol.616 No.-

<P>We present a machine-learning photometric redshift (ML photo-<I>z</I>) analysis of the Kilo-Degree Survey Data Release 3 (KiDS DR3), using two neural-network based techniques: ANNz2 and MLPQNA. Despite limited coverage of spectroscopic training sets, these ML codes provide photo-<I>z</I>s of quality comparable to, if not better than, those from the Bayesian Photometric Redshift (BPZ) code, at least up to <I>z</I>phot ≲ 0.9 and <I>r</I> ≲ 23.5. At the bright end of <I>r</I> ≲ 20, where very complete spectroscopic data overlapping with KiDS are available, the performance of the ML photo-<I>z</I>s clearly surpasses that of BPZ, currently the primary photo-<I>z</I> method for KiDS. Using the Galaxy And Mass Assembly (GAMA) spectroscopic survey as calibration, we furthermore study how photo-<I>z</I>s improve for bright sources when photometric parameters additional to magnitudes are included in the photo-<I>z</I> derivation, as well as when VIKING and WISE infrared (IR) bands are added. While the fiducial four-band <I>ugri</I> setup gives a photo-<I>z</I> bias 〈<I>δz</I>/(1 + <I>z</I>)〉 = −2 × 10<SUP>−4</SUP> and scatter <I>σδz/(1+z)</I> < 0.022 at mean 〈<I>z</I>〉 = 0.23, combining magnitudes, colours, and galaxy sizes reduces the scatter by ~7% and the bias by an order of magnitude. Once the <I>ugri</I> and IR magnitudes are joined into 12-band photometry spanning up to 12 <I>μ</I>m, the scatter decreases by more than 10% over the fiducial case. Finally, using the 12 bands together with optical colours and linear sizes gives 〈<I>δz</I>/(1 + <I>z</I>)〉 < 4 × 10<SUP>−5</SUP> and <I>σ</I><I>δz</I>/(1+<I>z</I>) < 0.019. This paper also serves as a reference for two public photo-<I>z</I> catalogues accompanying KiDS DR3, both obtained using the ANNz2 code. The first one, of general purpose, includes all the 39 million KiDS sources with four-band <I>ugri</I> measurements in DR3. The second dataset, optimised for low-redshift studies such as galaxy-galaxy lensing, is limited to <I>r</I> ≲ 20, and provides photo-<I>z</I>s of much better quality than in the full-depth case thanks to incorporating optical magnitudes, colours, and sizes in the GAMA-calibrated photo-<I>z</I> derivation.</P>

Food Value and Safety Status of Raw (Unfermented) and Fermented Higher Basidiomycetes, Lenzites quercina (L) P. Karsten

Clement Olusola Ogidi,Victor Olusegun Oyetayo,Bamidele Juliet Akinyele,Camilo Amaro De Carvalho,Maria Catarina Megumi Kasuya 한국식품영양과학회 2018 Preventive Nutrition and Food Science Vol.23 No.3

Food value and safety of a wild macrofungus, Lenzites quercina were investigated. The proximate and mineral composition of raw and fermented L. quercina were assessed using standard methods. Brine shrimp lethality bioassay was adopted for assessment of the toxicological property of the extracts obtained from raw and fermented L. quercina. The result of proximate composition revealed higher protein content (26.15%) in fermented L. quercina, while the value of carbohydrate (38.3%), crude fibre (27.6%), and ash contents (6.5%) were higher (P<0.05) in raw L. quercina when compared to fermented L. quercina. The macro and micro elements in the raw and fermented L. quercina were in decreasing order of Ca> K> Zn> Fe> Na> Mg> Pb> Cu with values ranging from 4.04 mg/g to 721.6 mg/g. The amino acids in raw and fermented L. quercina ranged from 0.05 mg/g to 23.78 mg/g, while the fatty acids ranged from 0.11% to 38.5%. The mortality rate of the Artemia salina against the extracts was from 8.0% to 38.0% with lethal dose at 50% of population within 49.11 and 250.50 g/mL. The results from this study revealed that L. quercina possesses essential amino acids, fatty acids, and substantial micro elements, which may be useful in the formulation of functional foods and nutraceuticals.