Hydroxylapatite for Laryngotracheal Framework Reconstruction

1989 ◽  
Vol 98 (9) ◽  
pp. 713-717 ◽  
Author(s):  
Minoru Hirano ◽  
Tetsuji Yoshida ◽  
Shinji Sakaguchi
Keyword(s):  
The Other ◽  
Two Stage ◽  
Second Stage

Hydroxylapatite plates and rings were employed for reconstruction of the laryngotracheal framework in 12 patients. The cause of the framework defect was surgery for stenosis in nine cases and removal of malignancy in the other three. The trough method associated with a two-stage procedure was tolerated in all 12 cases. Hydroxylapatite plates or rings were used to reconstruct the framework during the second stage. The implant was well taken in all cases, without any infection or rejection. Nine of the 12 cases resulted in excellent airways.

scholarly journals Symptomatic trochanteric non-union following total hip replacement treated with reattachment combined with two-stage revision surgery of the femoral stem

2019 ◽  
Vol 101 (6) ◽  
pp. e133-e135
Author(s):  
E Drampalos ◽  
L Bayam ◽  
J Oakley ◽  
M Hemmady ◽  
J Hodgkinson
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Posterior Approach ◽  
Femoral Stem ◽  
The Other ◽  
Artificial Joint ◽  
Two Stage ◽  
Non Union ◽  
Total Hip ◽  
Second Stage

We present a case of symptomatic trochanteric non-union following total hip replacement treated initially with a Dall-Miles grip plate. After failure of this treatment, the patient had a two-stage revision. Trochanteric non-union is one of the well-described complications after total hip replacement. It is frequently difficult to treat, while potentially causing weakness, altered gait and instability of the artificial joint. We believe that reattachment of the trochanter combined with a staged revision of the femoral stem using a posterior approach for the second stage could be a valuable technique to be added to the orthopaedic armamentarium for recurrent and symptomatic trochanteric non-unions after primary total hip replacement, particularly after failure to treat with all the other techniques described in literature.

Dynamic Modelling and Performance of a Two Stage Piezoelectric Servovalve

2016 ◽  
Author(s):  
Johan Persson ◽  
Andrew R. Plummer ◽  
Christopher R. Bowen ◽  
Phil L. Elliott
Keyword(s):  
Closed Loop ◽  
Dynamic Modelling ◽  
Flow Characteristics ◽  
The Other ◽  
Step Response ◽  
Hydraulic Fluid ◽  
Two Stage ◽  
Second Stage ◽  
And Performance ◽  
Spool Valve

This paper describes the design, simulation and testing of a piezoelectrically-actuated two stage spool valve. The first stage is a small spool controlled by a piezoelectric ring bender and the second stage is a closed loop position controlled main spool. A dynamic mathematical model of the valve has been derived. Step response tests for both the first stage and second stage are presented, and experimental second stage frequency response results are shown. The mathematical models for the amplifier, first stage and second stage spool behaviour are validated against experimental data. The second stage spool behaviour is found to be very sensitive to the first stage flow characteristics. In addition, the displacement of the hydraulic fluid by the piezoelectric ring bender, from one side of the piezoelectric ring bender to the other, had a significant impact on the valve characteristics.

scholarly journals Two-Stage Allocations and the Double $Q$-Function

10.37236/1714 ◽  
2003 ◽  
Vol 10 (1) ◽  
Author(s):  
Sergey Agievich
Keyword(s):  
The Other ◽  
Empty Cell ◽  
Two Stage ◽  
Second Stage ◽  
Th Cell ◽  
Asymptotic Expressions ◽  
Q Function

Let $m+n$ particles be thrown randomly, independently of each other into $N$ cells, using the following two-stage procedure.1. The first $m$ particles are allocated equiprobably, that is, the probability of a particle falling into any particular cell is $1/N$. Let the $i$th cell contain $m_i$ particles on completion. Then associate with this cell the probability $a_i=m_i/m$ and withdraw the particles.2. The other $n$ particles are then allocated polynomially, that is, the probability of a particle falling into the $i$th cell is $a_i$.Let $\nu=\nu(m,N)$ be the number of the first particle that falls into a non-empty cell during the second stage. We give exact and asymptotic expressions for the expectation ${\bf E}\nu$.

scholarly journals Design of a 335 GHz Frequency Multiplier Source Based on Two Schemes

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 948 ◽  
Author(s):  
Jin Meng ◽  
Dehai Zhang ◽  
Guangyu Ji ◽  
Changfei Yao ◽  
Changhong Jiang ◽  
...  
Keyword(s):  
Output Power ◽  
High Power ◽  
Power Source ◽  
Terahertz Imaging ◽  
Frequency Multiplier ◽  
The Other ◽  
Two Stage ◽  
Second Stage ◽  
W Band ◽  
On Chip

Based on a W-band high-power source, two schemes are proposed to realize a 335 GHz frequency multiplier source. The first scheme involves producing a 335 GHz signal with a two-stage doubler. The first doubler adopts two-way power-combined technology and the second stage is a 335 GHz doubler using a balanced circuit to suppress the odd harmonics. The measured output power was about 17.9 and 1.5 dBm at 167.5 and 335 GHz, respectively. The other scheme involves producing a 335 GHz signal with a single-stage quadrupler built on 50 µm thick quartz circuit adopting an unbalanced structure. The advantage of the unbalanced structure is that it can provide bias to the diodes without an on-chip capacitor, which is hard to realize with discrete devices. The measured output power was about 5.8 dBm at 337 GHz when driven with 22.9 dBm. Such 335 GHz frequency multiplier sources are widely used in terahertz imaging, radiometers, and so on.

scholarly journals Structures lexico-syntaxiques fondées sur le verbe viser dans l’écrit scientifique. Analyse contrastive franco-polonaise

2021 ◽  
Vol 33 ◽  
pp. 1-12
Author(s):  
Katarzyna Gabrysiak
Keyword(s):  
Subject Matter ◽  
Two Dimensions ◽  
The Other ◽  
Main Body ◽  
Two Stage ◽  
Scientific Text ◽  
Syntactic Structures ◽  
Second Stage ◽  
Stage Process ◽  
The Subject

The paper offers an analysis of lexical-syntactic structures based on the verb form viser typical of a scientific text, that is a text that follows quite a stable and rigid structure. A corpus-based analysis, achieved through the use of the Scientext corpora, runs across two dimensions. The first dimension is constituted by the subject matter of the text while the other dimension concerns the relation between the author of the text and the recipient. The analysis presented is a two-stage process. At the first stage, lexical-syntactic structures are singled out. The second stage is to assign those structures to the particular parts of the text, such as Introduction, Main body, Conclusion.

HELPING AND SABOTAGING IN TOURNAMENTS

2005 ◽  
Vol 07 (02) ◽  
pp. 211-228 ◽  
Author(s):  
MATTHIAS KRÄKEL
Keyword(s):  
The Other ◽  
Two Stage ◽  
Second Stage ◽  
Asymmetric Equilibria ◽  
The Cost ◽  
Cost Effect

A two-stage, two-person tournament is discussed, in which each player can influence the other one at the first stage by choosing help, sabotage or no action. At the second stage, the players choose effort to win the tournament. Helping and sabotaging have two effects — they influence the likelihood of winning (likelihood effect) and they determine the equilibrium efforts and, therefore, effort costs (cost effect). Depending on the interplay of the two effects, diverse types of equilibria are possible. In particular, if the cost effect dominates the likelihood effect (i.e., both players concentrate on minimizing effort costs), two asymmetric equilibria will coexist in which one player helps his opponent, whereas the other one chooses sabotage and vice versa.

Tests of a Two-Stage Model of Visual Matching

1983 ◽  
Vol 56 (2) ◽  
pp. 343-354
Author(s):  
Karen Rosen ◽  
Maurice Hershenson
Keyword(s):  
Stimulus Duration ◽  
The Other ◽  
Stage Model ◽  
Comparison Process ◽  
Two Stage ◽  
Second Stage ◽  
Visual Matching ◽  
Square Configuration

Predictions from a model of visual matching were tested in two experiments. The model consists of a wholistic comparison process followed by an element-by-element comparison process. All stimuli are processed by the first stage but only those that permit a decision based on a wholistic comparison produce responses. When discrimination is difficult and a decision cannot be reached by a wholistic comparison, the second stage of processing is initiated. Degree of discriminability and stimulus duration (100 and 1000 msec.) were varied in both experiments. In Exp. 1, the stimulus elements were arranged in a square configuration to facilitate a wholistic comparison. As predicted, the hard-different stimuli took longer to match than the same or easy-different stimuli. The hard-different stimuli presented for 1000 msec, took longer to match than those presented for 100 msec. There was no difference in accuracy between responses to hard-different pairs at the two durations. In Exp. 2, the stimulus elements were arranged in a horizontal row and placed one above the other to facilitate element-by-element comparison. As predicted, these stimuli produced slower and more accurate responses for same and hard-different stimulus pairs only when they were exposed for 1000 msec. Responses to easy-different stimulus pairs were made quickly and accurately.

The Formation of the Jewish Canon

2021 ◽  
pp. 3-33
Author(s):  
Gilles Dorival
Keyword(s):  
First Century ◽  
The Other ◽  
Third Century ◽  
Stage Model ◽  
Two Stage ◽  
Historical Process ◽  
Second Stage ◽  
The Third ◽  
Classic Theory ◽  
The Moment

The word canon means a list of biblical books understood as being inspired by God, and therefore normative, enumerated according to a given order and in a determined number. There were three great theories about the canon: Levita (1538), Grabe (1715) and the classic theory (end of the nineteenth century), according to which the canon results from a historical process, first the canonization of the Law (between 450 and 400 BCE), then Prophets’ one (third century), and last Writings’ one (during the Hasmonean period or at the end of the first century in Jabneh). Rectifications to the classic model must be provided. In the second stage, it is inappropriate to speak about a canonization of the Prophets; this canonization included both the Torah and the Prophets: they are not two separate orders, but a single corpus at the same level. On the other hand, one must distinguish two Jewish canons. The first one is defined by Law and Prophets and can be dated back to the third century BCE. The second one involves three orders with a ranking: first, the Torah that, second, the Prophets repeat and reinforce, and which, third, the Writings repeat. It dates back to the years 200 CE. So, maybe the classic three-stage model has to be changed into a two-stage model: first, the Torah and the Prophets; second, the Torah, the Prophets, and the Writings. In other words, the canonization involving only the Torah may never have occurred. But this scenario is not fully established and the classic theory must be kept for the moment.

Two-Stage Surgical Treatment of Unresectable Obstructive Rectal Cancer with Synchronous Hepatic Metastases

2007 ◽  
Vol 73 (12) ◽  
pp. 1218-1223
Author(s):  
Konstantinos E. Tsimogiannis ◽  
George K. Pappas-Gogos ◽  
Konstantinos Nikas ◽  
Stella Stefanaki-Nikou ◽  
Konstantinos Gossios ◽  
...  
Keyword(s):  
Rectal Cancer ◽  
Surgical Treatment ◽  
Hepatic Metastases ◽  
Rectal Tumor ◽  
The Other ◽  
Open Approach ◽  
Hepatic Tumors ◽  
Two Stage ◽  
Second Stage ◽  
Number Of Patients

Unresectable obstructing rectal cancer with synchronous hepatic metastases is usually a fatal disease. This prospective study was scheduled to treat this difficult condition using a multimodal curative strategy combined with a two-stage surgical treatment. Patients with T4N2 or N3M1 rectal cancer and hepatic metastases underwent a two-stage surgical treatment; in the first stage, a decompressing colostomy plus radiofrequency ablation (RFA) in liver metastases. In the second stage, a colectomy was done with stoma closing and resection of superficial necrotic hepatic tumors, plus repetition of RFA in recurrent or new hepatic tumors. Four patients were included, with 1 to 8 (total 20) hepatic metastases, each <5 cm in diameter. In the first stage, two patients were operated on by open approach and two laparoscopically. All hepatic tumors were treated by RFA to produce at least a 1-cm tumor-free margin. After chemoradiation of the rectal tumor, the second stage of surgical treatment was successful in colectomies and stoma closing. Three had complete necrosis of hepatic tumors and one a recurrent tumor plus two new metastases treated by RFA. Two patients died 14 and 42 months after the first stage of surgical treatment, and the other two patients are alive. One of them is disease-free 54 months after the first stage and the other with new recurrence 52 months after the first stage of the procedure. The multimodal curative strategy for the treatment of unresectable obstructing rectal cancer with synchronous hepatic metastases, containing a two-stage surgical treatment with RFA of hepatic metastases and chemoradiation of the rectal tumor between the two stages of the procedure, is a promising method. A larger number of patients with long-term follow-up is necessary to confirm these findings.

Impulsivity and Aggression: A Meta-analysis Using the UPPS Model of Impulsivity

2019 ◽  
Author(s):  
Konrad Bresin
Keyword(s):  
Structural Equation Modeling ◽  
Sensation Seeking ◽  
Structural Equation ◽  
Meta Analysis ◽  
The Other ◽  
Equation Modeling ◽  
Negative Urgency ◽  
Two Stage ◽  
Trait Impulsivity

Trait impulsivity has long been proposed to play a role in aggression, but the results across studies have been mixed. One possible explanation for the mixed results is that impulsivity is a multifaceted construct and some, but not all, facets are related to aggression. The goal of the current meta-analysis was to determine the relation between the different facets of impulsivity (i.e., negative urgency, positive urgency, lack of premeditation, lack of perseverance, and sensation seeking) and aggression. The results from 93 papers with 105 unique samples (N = 36, 215) showed significant and small-to-medium correlations between each facet of impulsivity and aggression across several different forms of aggression, with more impulsivity being associated with more aggression. Moreover, negative urgency (r = .24, 95% [.18, .29]), positive urgency (r = .34, 95% [.19, .44]), and lack of premeditation (r = .23, 95% [.20, .26]) had significantly stronger associations with aggression than the other scales (rs &lt; .18). Two-stage meta-analytic structural equation modeling showed that these effects were not due to overlap among facets of impulsivity. These results help advance the field of aggression research by clarifying the role of impulsivity and may be of interest to researchers and practitioners in several disciplines.

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