درد کا حد سے گزرنا ہے دوا ہو جانا
نحمدہ ونصلی علی رسولہ الکریم امّا بعد فاعوذ بااللہ من الشیطن الرجیم
بسم اللہ الرحمن الرحیم
معزز اسا تذہ کرام اور میرے ہم مکتب ساتھیو!السلام علیکم! آج مجھے جس موضوع پر گفتگو کرنی ہے وہ ہے:’’درد کا حد سے گزرنا ہے دوا ہو جانا ‘‘
جنابِ صدر!
دکھ درد، تکلیف ہم معنی الفاظ ہیں، زندگی میں ہر شخص کوکسی نہ کسی موقع پر رنج وغم اور دکھ و تکلیف سے واسطہ پڑتا ہے خوشیاں روٹھ جاتی ہیں، رنج و الم کے بادل گھٹائیں بن کر برسنا شروع ہو جاتے ہیں گھر کے آنگن میں نوید ومسرت کی چاندنی بکھیرنے والا قمر گہنا جاتا ہے۔
صدرِ ذی وقار!
زندگی کے نشیب وفراز سے انسان ہمکنارر ہتا ہے۔ افراط و تفریط کا سلسلہ شروع رہتا ہے، کامیاب انسان وہ ہے جوایسے حالات میں مستقل مزاج رہتا ہے ان بوقلمونیوں سے اس کے پائے استقلال میں لغزش نہیں آتی اور یوں اس کی زندگی کی گاڑی رواں دواں رہتی ہے۔بقول غالبؔ
رنج سے خوگر ہوا انساں تو مٹ جاتا ہے رنج
مشکلیں اتنی پڑیں مجھ پر کہ آساں ہو گئیں
صدرِ محترم!
جب کوئی چیز حد سے بڑھ جاتی ہے، اپنی انتہا کو پہنچ جاتی ہے تو اس کا وجود عنقا ہو جاتاہے اس کی حیثیت بدل جاتی ہے اس کے نفع نقصان کا تصور تبدیل ہو جاتا ہے۔ اس کے مضر اثرات مصلح ہو جاتے ہیں اس میں یکسر تبدیلی آجاتی ہے اور ایّام کے ساتھ ساتھ وہ قصہ پارینہ بن جاتی ہے۔
محترم سامعین!
رات اپنی انتہا کو پہنچتی ہے تو بادِ نسیم صبح کے حیات بخش جھونکوں سے آشنا ہے۔ دن اپنی بلندیوں کومس کرتا ہے تو قمر کی برووت بھری چاندنی قلب و ذہن کی طراوت کا باعث بنتی...
Background of the Study: The aim of the present research was to examine the assessment practices of Speech-Language Pathologists for Cognitive Communication Disorders after Traumatic Brain Injury.
Methodology: It was a cross-sectional survey method, a convenient sampling technique. Research was carried out from January 2021 to June 2021. The sample size was n=21, out of which n= 9 (42.8%) participants, each from Rawalpindi and Islamabad n= 3 (14.4%) participants from Lahore filled in their responses. Medium; being Online, the questionnaire was distributed either through email, WhatsApp or Facebook MessengerApp. SLPs who were undergraduates or who had no experience working with TBI clients were excluded. Questionnaire included 12 items. Responses of research participants were recorded using Google Forms and presented in the form of n (%). The data were analyzed using descriptive analysis, and chi-square analysis was performed to confirm the association between settings, city of practice and years of experience through Statistical Package of Social Sciences (SPSS) Version 22.0.
Results: Speech-Language Pathologists reported that they routinely assessed (62% each) Receptive and Expressive communication. However; less than half of the participants routinely evaluated domains like verbal pragmatic skills (43.3%), functional communication (33.3%) and phonemic awareness (33.3%). SLPs assessed their clients by employing tests like MoCA (55.62%), Quick Aphasia Battery (18.75%), Cognitive Assessment (LOTCA Protocol) (14.35%) and a combination of Formal (48%) and Informal (52%) clinical interviews.
Conclusion: Informal discourse assessment is incorporated more frequently as compared to informal discourse evaluation in assessment practices of Speech-Language pathologists of Pakistan for cognitive communication impairment followed by traumatic brain injury.
Piezoceramic/polymer composites with 1-3 connectivity are the most extensively studied and utilized for different applications among existing 10 types of diphasic composites. This type of composite consists of individual piezoceramic rods or fibers aligned in the direction parallel to poling and embedded in a polymer matrix. The piezoceramic fiber or rods play an active role for energy conversion between the mechanical and electrical energy, while the polymer phase acts as a passive medium and transfers the mechanical energy between the piezoelectric ceramic and surrounding with which the composite interacts. These composites are widely used in underwater hydrophone applications, ultrasound actuators and sensors in medical diagnostic devices. In this study, piezoceramics modified compositions; Pb/Co doped barium titanate (Ba0.95Pb0.05)(Ti0.99Co0.01)O3 (BT-PC) and Sr doped lead zirconate titanate (Pb0.94Sr0.04)(Zr0.52Ti0.48)O3 (PZT-S) were synthesized through solid state reaction method. Self-synthesized BT-PC powder has particle size ~0.4μm and after sintering and poling its key properties were; εr= 1100, d33= 136pC/N, g33= 14×10-3 Vm/N, kt=31%, and tanδ= 0.005. Likewise, the basic properties of the PZT-S were; εr= 1327, d33= 335pC/N, g33= 29×10-3 Vm/N, kt=45%, and tanδ= 0.030. Beside these, a novel Pbfree potassium sodium niobate (KNN) based optimized composition 0.9475(Li0.02(Na0.53K0.48)0.98)(Nb0.80Ta0.20)O5-0.0525AgSbO3-0.5wt.%MnO2, (LKNNT -AS-M) with electrical properties; εr= 1927, d33= 287pC/N, g33= 17×10-3 Vm/N, kt=38%, and tanδ= 0.038 was also used as an active phase. Monothane-A70, araldite- F, and Epo-Tek 301 were used as a passive polymer matrix in this work. Three different techniques named as; a novel die-pressing technique, modified align-and-fill, and improved dice-and-fill technique were used for the fabrication of 1-3 composites. Several series of the composites including; BT-PC/monothane-A70, PZT-S/monothane-A70, PZT-S/araldite-F, and LKNNT-AS-M/Epo-Tek 301 with varying piezoceramics rods diameter, spacing between the rods and aspect ratio were developed. The composites developed through die-pressing and align-and-fill techniques possess piezoceramics rods diameter ~1.20mm and ~0.78mm respectively with ceramics contents 11-35 vol. %. However, with dice-and-fill process the LKNNTxiv AS-M ceramic pillars cross-sectional dimensions were 50´50μm with relatively high aspect ratio up to 11. In addition, an underwater transducer with sample changing options was developed indigenously. Disc shape samples of monolithic piezoceramic and 1-3 composite were assembled in the self-designed transducer individually. Transducer’s underwater voltage receiving sensitivity (Sh) and transmitting voltage response (Sv) were investigated in the frequency range 10-200 kHz using a calibrated projector method with pulse technique Developed 1-3 composites were passed through comprehensive microstructural, dielectric, elastic and resonance investigations. Results revealed that all the fabricated 1-3 composites possess clear thickness resonance modes without any mode coupling. The BT-PC/monothane-A70 composites exhibited thickness coupling factor kt (~44%), figure of merit FOM (up to 7169fm2/N), acoustic impedance Z (8-13Mrayl) and elastic stiffness C33 D (36-65GPa). The PZT-S based composites exhibited superior properties due to high piezoelectric charge coefficient (d33~335 pC/N) and high electromechanical coupling coefficient (k33~67%) of PZT-S compared to BT-PC piezoceramic. In addition, low stiffness (C33 D ~ 21-55 GPa) PZT-S/monothane-A70 composites have better acoustic impedance (Z ~ 6-14 Mrayl), high charge coefficient (d33~202-271 pC/N), high hydrostatic charge and voltage coefficients (dh ~ 136-171 pC/N, gh ~ 33- 114×10-3 Vm/N) and high figure of merit (FOM ~ 4488-19364 fm2/N) compared to the PZT-S/araldite-F composites encompassing high stiffness (C33 D ~ 23-60 GPa). The Pb-free LKNNT-AS-M/Epo-Tek 301 composites also exhibited the enhanced properties such as higher thickness factor kt ~63-67%, lower planar factor kp ~27-34%, higher kt/kp ratio ~2.3, low electrical (tanδ ~0.027) and mechanical (Qm ~9) losses, encouraging acoustic impedance Z ~4.2-7.8Mrayl and ~5 times higher voltage coefficient g33 compared to LKNNT-AS-M piezoceramic. Likewise, the underwater results revealed that the transducer with 1-3 PZT-S/araldite-F sample exhibited better voltage receiving sensitivity Sh (-214dB ref 1V/μPa) due to its ~295% higher piezoelectric voltage coefficient gh (30´10-3Vm/N) compared to PZT-S. The above mentioned promising results of the developed composites indicate that they have the potential to be used as active elements in high performance ultrasonic transducers.